{"id":23612,"date":"2026-10-19T02:40:10","date_gmt":"2026-10-18T18:40:10","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=23612"},"modified":"2026-10-26T07:42:13","modified_gmt":"2026-10-25T23:42:13","slug":"niobium-hsla-haz-toughness","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/ko\/niobium-hsla-haz-toughness\/","title":{"rendered":"\ub2c8\uc624\ube00 HSLA HAZ \uc778\uc131"},"content":{"rendered":"

\ub2c8\uc624\ube00 HSLA HAZ \uc778\uc131<\/h1>\n\n\n\n

1400 °C\uc5d0\uc11c \uc815\uc810\uc744 \uc774\ub8e8\ub294 \ub2e8\uc77c \uc6a9\uc811 \uc5f4 \uc0ac\uc774\ud074\uc740 \uc5f4\uc601\ud5a5\ubd80\uc758 \uad6c \uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \uacb0\uc815\ub9bd\uc744 \uc870\ub300\ud654\uc2dc\ud0a4\uba70, \uadf8\ub85c \uc778\ud574 \ub0a8\ub294 \ubbf8\uc138\uc870\uc9c1\uc740 \uc77c\ubc18\uc801\uc73c\ub85c \uc6a9\uc811 \uc870\uc778\ud2b8\uc5d0\uc11c \uac00\uc7a5 \ucde8\uc57d\ud55c \ubd80\ubd84\uc785\ub2c8\ub2e4. \ubcf8 \uc5f0\uad6c\ub294 11\uc885\uc758 \uc2e4\ud5d8\uc6a9 C-Mn \uac15\uc744 \uc774\ub7ec\ud55c \uc0ac\uc774\ud074 \ud558\ub098\uc5d0 \ud1b5\uacfc\uc2dc\ud0a4\uba70, \uc138 \uac00\uc9c0 \ud0c4\uc18c \uc218\uc900\uc5d0 \uc138 \uac00\uc9c0 \ub2c8\uc624\ube00 \uc218\uc900\uc744 \uad50\ucc28\uc2dc\ud0a4\uace0 \uace0\uc815\ub41c \ub2c8\uc624\ube00 \ud568\ub7c9\uc5d0\uc11c \ub450 \uac00\uc9c0 \ub9dd\uac04 \ubcc0\ud615\uc744 \ub354\ud55c \ub4a4, \uc0e4\ub974\ud53c \uacb0\uacfc\ub97c \ubbf8\uc138\uc870\uc9c1\uc758 \ub450 \uac00\uc9c0 \uce21\uc815 \ud2b9\uc9d5\uc778 \uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8\uc758 \uba74\uc801 \ubd84\uc728\uacfc \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8-\uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \uad6c\uc131\uc0c1\uc758 \uba74\uc801 \ubd84\uc728\uacfc \uc5f0\uad00\uc2dc\ud0b5\ub2c8\ub2e4. \ubcf8 \uc5f0\uad6c\uac00 \ubcf4\uace0\ud558\ub294 \uad6c\ubd84\uc120\uc740 \uc57d 6%\uc758 \uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8 \ubd84\uc728\uc785\ub2c8\ub2e4. \uc774 \uc218\uce58\ub97c \ucd08\uacfc\ud558\uba74 \ucde8\uc131 \ud30c\uad34\ub294 \uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8\uc5d0\uc11c \uc2dc\uc791\ub418\uace0, \uadf8 \uc774\ud558\uc5d0\uc11c\ub294 \ud30c\uad34\uac00 \ubca0\uc774\ub098\uc774\ud2b8 \ud328\ud0b7\uc758 \uad50\ucc28\uc810\uc5d0\uc11c \uc2dc\uc791\ub429\ub2c8\ub2e4.<\/p>\n\n\n\n

\ud558\ub098\uc758 \uc6a9\uc811 \uc0ac\uc774\ud074\uc5d0 \ub300\ud55c 11\uc885\uc758 \uc2e4\ud5d8\uc6a9 \uac15<\/h2>\n\n\n\n

\uae30\ubcf8 \uc870\uc131\uc740 \uc77c\ubc18 C-Mn \uac15\uc785\ub2c8\ub2e4. \uc138 \uadf8\ub8f9\uc740 1.5% \ub9dd\uac04\uc744 \uacf5\uc720\ud558\uba70 0.05, 0.10 \ubc0f 0.15% \ud0c4\uc18c\ub97c \ud568\uc720\ud558\uace0, \uac01 \uadf8\ub8f9 \ub0b4\uc5d0\uc11c \uc138 \uac15\uc740 0, 0.015 \ubc0f 0.03% \ub2c8\uc624\ube00\uc744 \ud568\uc720\ud569\ub2c8\ub2e4. \uc774\ub85c\uc368 \ud0c4\uc18c\ub2f9\ub7c9\uc740 0.30, 0.35 \ubc0f 0.40\uc774 \ub429\ub2c8\ub2e4. \ucd94\uac00\ub85c \ub450 \uac15\uc740 \ub2c8\uc624\ube00\uc744 0.015%\ub85c \uc720\uc9c0\ud558\uace0 \ub9dd\uac04\uc744 \ub300\uc2e0 \ubcc0\ud654\uc2dc\ucf1c, \ud558\ub098\ub294 2.1%, \ub2e4\ub978 \ud558\ub098\ub294 0.9%\ub85c \ud558\uc5ec \ub9dd\uac04\uc758 \ud6a8\uacfc\ub97c \ub2c8\uc624\ube00\uc758 \ud6a8\uacfc\ub85c\ubd80\ud130 \ubd84\ub9ac\ud569\ub2c8\ub2e4. \ud0c4\uc18c\ub2f9\ub7c9\uc740 \uc9c8\ub7c9 \ud37c\uc13c\ud2b8\ub85c C + Si\/24 + Mn\/6 + Ni\/40 + Cr\/4 + V\/14\ub85c \uacc4\uc0b0\ub429\ub2c8\ub2e4.<\/p>\n\n\n\n

\uac15\uc885<\/th>C<\/th>Si<\/th>Mn<\/th>P<\/th>S<\/th>Al<\/th>Nb<\/th>N<\/th>Ceq<\/th><\/tr><\/thead>
KT1<\/td>0.05<\/td>0.2<\/td>1.5<\/td>0.01<\/td>0.005<\/td>0.03<\/td>0<\/td>0.003<\/td>0.3<\/td><\/tr>
KT2<\/td>0.05<\/td>0.2<\/td>1.5<\/td>0.01<\/td>0.005<\/td>0.03<\/td>0.015<\/td>0.003<\/td>0.3<\/td><\/tr>
KT3<\/td>0.05<\/td>0.2<\/td>1.5<\/td>0.01<\/td>0.005<\/td>0.02<\/td>0.03<\/td>0.003<\/td>0.3<\/td><\/tr>
KT4<\/td>0.1<\/td>0.2<\/td>1.5<\/td>0.01<\/td>0.005<\/td>0.02<\/td>0<\/td>0.003<\/td>0.35<\/td><\/tr>
KT5<\/td>0.1<\/td>0.2<\/td>1.5<\/td>0.01<\/td>0.005<\/td>0.02<\/td>0.015<\/td>0.003<\/td>0.35<\/td><\/tr>
KT6<\/td>0.1<\/td>0.2<\/td>1.5<\/td>0.01<\/td>0.005<\/td>0.02<\/td>0.03<\/td>0.003<\/td>0.35<\/td><\/tr>
KT7<\/td>0.15<\/td>0.2<\/td>1.5<\/td>0.01<\/td>0.005<\/td>0.03<\/td>0<\/td>0.003<\/td>0.4<\/td><\/tr>
KT8<\/td>0.15<\/td>0.2<\/td>1.5<\/td>0.01<\/td>0.005<\/td>0.02<\/td>0.015<\/td>0.003<\/td>0.4<\/td><\/tr>
KT9<\/td>0.15<\/td>0.2<\/td>1.5<\/td>0.01<\/td>0.005<\/td>0.02<\/td>0.03<\/td>0.003<\/td>0.4<\/td><\/tr>
KT10<\/td>0.05<\/td>0.2<\/td>2.1<\/td>0.01<\/td>0.005<\/td>0.02<\/td>0.015<\/td>0.003<\/td>0.4<\/td><\/tr>
KT11<\/td>0.15<\/td>0.2<\/td>0.9<\/td>0.01<\/td>0.005<\/td>0.02<\/td>0.015<\/td>0.003<\/td>0.3<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\ucd9c\ucc98: \uc6d0\ubb38 \uc7a5\uc758 \ud45c 1 (PDF 99\ud398\uc774\uc9c0). 11\uc885 \uac15\uc758 \uc9c8\ub7c9 \ud37c\uc13c\ud2b8 \ud654\ud559 \uc870\uc131\uacfc \ud574\ub2f9 \uc7a5\uc5d0 \uc778\uc1c4\ub41c \uacf5\uc2dd\uc73c\ub85c \uacc4\uc0b0\ud55c \ud0c4\uc18c\ub2f9\ub7c9. \ubaa8\ub4e0 \ud788\ud2b8\uc758 \uc794\ub7c9\uc740 \ucca0\uc785\ub2c8\ub2e4.<\/em><\/p>\n\n\n\n

\uc0ac\uc774\ud074\uc740 \ud3c9\uade0\uc774 \uc544\ub2cc \ucd5c\uc545\uc758 \uacbd\uc6b0\ub97c \ub9cc\ub4e4\ub3c4\ub85d \uc120\ud0dd\ub418\uc5c8\uc73c\uba70, 1400 °C\uc758 \uc815\uc810 \uc628\ub3c4\ub97c \uac16\ub294 \ub2e8\uc77c \ud328\uc2a4\ub294 \uace0\uc785\uc5f4 \uc870\ub300\ub9bd HAZ\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \uac00\uc5f4\uc740 \ucd08\ub2f9 50 °C\ub85c \uc815\uc810\uae4c\uc9c0 \uc9c4\ud589\ub418\uace0, \uc720\uc9c0\ub294 10\ucd08\uac04 \uc9c0\uc18d\ub418\uba70, \ub0c9\uac01\uc740 1400~800 °C \uc0ac\uc774\uc5d0\uc11c \ucd08\ub2f9 20 K, \uadf8 \ud6c4 800 °C \uc774\ud558\uc5d0\uc11c \ucd08\ub2f9 2 K\uc785\ub2c8\ub2e4. \uc0e4\ub974\ud53c \uc2dc\ud3b8\uc740 10 x 10 x 55 mm\uc774\uba70 \ub178\uce58\ub294 \uc2dc\ud3b8 \uc911\uc2ec\uc758 \uade0\uc77c\ud55c \ubbf8\uc138\uc870\uc9c1\uc5d0 \uc704\uce58\uc2dc\ud0a4\uace0, 0, -20 \ubc0f -40 °C\uc5d0\uc11c \ud30c\ub2e8\ud558\uc5ec \ucc9c\uc774 \uace1\uc120\uc744 \uc791\uc131\ud588\uc2b5\ub2c8\ub2e4. \uae08\uc18d\uc870\uc9c1 \uad00\ucc30\uc5d0\ub294 2% \ub098\uc774\ud0c8\uacfc \ub974 \ud398\ub77c \uc5d0\uce6d\uc744 \uc0ac\uc6a9\ud588\uace0, \uac70\uc2dc \uacbd\ub3c4\ub294 10 kg \ud558\uc911, \ubbf8\uc138 \uacbd\ub3c4\ub294 10 g \ud558\uc911\uc73c\ub85c \uce21\uc815\ud588\uc73c\uba70, \ub2c8\uc624\ube00 \ud0c4\ud654\ubb3c \uc11d\ucd9c\uc758 \uad6c\ub3d9\ub825\uc740 Thermo-Calc\ub85c \uacc4\uc0b0\ud588\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\"Thermal
\uadf8\ub9bc 1. \ubcf8 \uc5f0\uad6c\uc758 \ubaa8\ub4e0 \uac15\uc5d0 \uc0ac\uc6a9\ub41c \uc5f4 \uc0ac\uc774\ud074. \ucd08\ub2f9 50 °C\ub85c \uac00\uc5f4, 1400 °C\uc5d0\uc11c 10\ucd08 \uc720\uc9c0, 1400~800 °C \uc0ac\uc774\uc5d0\uc11c \ucd08\ub2f9 20 K, 800 °C \uc774\ud558\uc5d0\uc11c \ucd08\ub2f9 2 K\ub85c \ub0c9\uac01. \uc6d0\ubb38 \uadf8\ub9bc\uc5d0\uc11c \uc7ac\ud604.<\/figcaption><\/figure>\n\n\n\n

\uc0ac\uc774\ud074\uc774 \ub0a8\uae38 \uc218 \uc788\ub294 \uc138 \uac00\uc9c0 \ubbf8\uc138\uc870\uc9c1<\/h2>\n\n\n\n

\ubaa8\ub4e0 \ubaa8\uc758 \uc2dc\ud3b8\uc740 \uc870\ub300\ub9bd\uc774\uba70, \uc800\ub2c8\uc624\ube00 \uc870\uac74\uc5d0\uc11c\ub294 \uad6c \uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \uacb0\uc815\ub9bd\uacc4\uc5d0 \uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8\uac00, \uacb0\uc815\ub9bd \ub0b4\ubd80\uc5d0 \uce68\uc0c1 \ud398\ub77c\uc774\ud2b8\uac00 \uc874\uc7ac\ud569\ub2c8\ub2e4. \ub2c8\uc624\ube00\uc744 \ucca8\uac00\ud558\uba74 \uc54c\ub85c\ud2b8\ub9ac\uc624\ubaa8\ub974\ud53d \ud398\ub77c\uc774\ud2b8 \uce35\uc774 \ucd95\uc18c\ub418\uace0 \uc704\ub4dc\ub9cc\uc2a4\ud14c\ud150 \ud398\ub77c\uc774\ud2b8\uac00 \uacb0\uc815\ub9bd\ub0b4 \uce68\uc0c1 \ud398\ub77c\uc774\ud2b8\ub85c \ub300\uccb4\ub418\uba70, 0.03% \ub2c8\uc624\ube00\uc5d0\uc11c\ub294 \uce68\uc0c1 \ud398\ub77c\uc774\ud2b8 \uc790\uccb4\uac00 \ub77c\uc2a4 \uad6c\uc870\ub85c \ub300\uccb4\ub429\ub2c8\ub2e4. \uace0\uc815\ub41c \ub2c8\uc624\ube00 \ud568\ub7c9\uc5d0\uc11c \ud0c4\uc18c\ub97c \ub192\uc774\uba74 \ub3d9\uc77c\ud55c \ud604\uc0c1\uc774 \uc77c\uc5b4\ub098\ubbc0\ub85c, \ub450 \ucca8\uac00\ub294 \ubcc0\ud0dc \uc0dd\uc131\ubb3c\uc5d0 \uac19\uc740 \ubc29\ud5a5\uc73c\ub85c \uc791\uc6a9\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\ud574\ub2f9 \uc7a5\uc740 11\uac1c \uacb0\uacfc\ub97c \uc138 \ubc94\uc8fc\ub85c \ubd84\ub958\ud569\ub2c8\ub2e4. \ubc94\uc8fc I\uc740 \ub113\uc740 \uba74\uc801\uc758 \uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8, \uc704\ub4dc\ub9cc\uc2a4\ud14c\ud150 \ud398\ub77c\uc774\ud2b8 \ubc0f \uc18c\ub7c9\uc758 \ud384\ub77c\uc774\ud2b8\ub97c \uac16\ub294 \uae30\ubcf8 \uac15\uc785\ub2c8\ub2e4. \ubc94\uc8fc II\ub294 \uc587\uc740 \uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8 \uce35\uacfc \uacb0\uc815\ub9bd\ub0b4 \uce68\uc0c1 \ud398\ub77c\uc774\ud2b8\uc774\uba70, \ub2c8\uc624\ube00 \ubb34\ucca8\uac00 \uc911\ud0c4\uc18c \ubc0f \uace0\ud0c4\uc18c \uac15\uacfc \uc911\ub2c8\uc624\ube00\uc758 \uc800\ud0c4\uc18c \uac15\uc744 \ud3ec\ud568\ud569\ub2c8\ub2e4. \ubc94\uc8fc III\uc740 \ub9e4\uc6b0 \uc587\uace0 \ubd88\uc5f0\uc18d\uc801\uc778 \uacbd\uacc4\uce35\uc744 \uac16\ub294 \ubca0\uc774\ub098\uc774\ud2b8 \ub77c\uc2a4 \uad6c\uc870\uc774\uba70, \ub2c8\uc624\ube00\uc744 \ud568\uc720\ud55c \uc911\ud0c4\uc18c\ub2f9\ub7c9 \ubc0f \uace0\ud0c4\uc18c\ub2f9\ub7c9\uacfc \uace0\ub2c8\uc624\ube00\uc758 \uc800\ud0c4\uc18c \uac15\uc744 \ud3ec\ud568\ud569\ub2c8\ub2e4. \uc774 \ud398\uc774\uc9c0\uc758 \ub098\uba38\uc9c0 \ubd80\ubd84\uc5d0\uc11c \uc911\uc694\ud55c \uc810\uc740 \ubc94\uc8fc III\uc5d0\uc11c \ubaa8\ub4e0 \uacb0\uc815\ub9bd\uacc4\uac00 \ud398\ub77c\uc774\ud2b8\ub85c \ub36e\uc774\uc9c0\ub294 \uc54a\uc73c\uba70, \uc774\ub7ec\ud55c \ubd88\uc5f0\uc18d\uc131\uc774 \uade0\uc5f4\uc774 \uc2dc\uc791\ub418\ub294 \uc704\uce58\ub97c \ubc14\uafbc\ub2e4\ub294 \uac83\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\ub2c8\uc624\ube00\uc740 \ubcc0\ud0dc \uc628\ub3c4\ub97c \ub0ae\ucda5\ub2c8\ub2e4<\/h2>\n\n\n\n

\ud33d\ucc3d \uce21\uc815\uc740 \ub0c9\uac01 \uc911 \uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8\uac00 \ud615\uc131\ub418\uae30 \uc2dc\uc791\ud558\ub294 \uc628\ub3c4\ub97c \uae30\ub85d\ud558\uba70, \uc138 \ud0c4\uc18c \uadf8\ub8f9 \ubaa8\ub450\uc5d0\uc11c \ub2c8\uc624\ube00\uc774 \uc99d\uac00\ud568\uc5d0 \ub530\ub77c \uac12\uc774 \uac10\uc18c\ud569\ub2c8\ub2e4. \ud0c4\uc18c\ub2f9\ub7c9 0.30\uc5d0\uc11c \uc2dc\uc791 \uc628\ub3c4\ub294 \ub2c8\uc624\ube00 \ubb34\ucca8\uac00 \uc2dc 740 °C, 0.015%\uc5d0\uc11c 715 °C, 0.03%\uc5d0\uc11c 700 °C\uc785\ub2c8\ub2e4. 0.35\uc5d0\uc11c\ub294 \uc138 \uac12\uc774 700, 670 \ubc0f 660 °C\uc774\uba70, 0.40\uc5d0\uc11c\ub294 660, 640 \ubc0f 630 °C\uc785\ub2c8\ub2e4. \ud0c4\uc18c\ub294 \ub3d9\uc77c\ud55c \uc591\uc744 \ud6e8\uc52c \ub354 \ud070 \ud3ed\uc73c\ub85c \ub0ae\ucd94\uba70, 0.30 \uadf8\ub8f9\uacfc 0.35 \uadf8\ub8f9 \uc0ac\uc774\uc5d0\uc11c \uc57d 40 °C\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\"Transformation
\uadf8\ub9bc 4. \ub2c8\uc624\ube00 \ud568\ub7c9\uc5d0 \ub300\ud55c \uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8 \ubcc0\ud0dc \uc2dc\uc791 \uc628\ub3c4, \ud0c4\uc18c\ub2f9\ub7c9\ubcc4 \uace1\uc120 \ud558\ub098\uc529. \uc6d0\ubb38 \uadf8\ub9bc\uc5d0\uc11c \uc7ac\uc791\uc131, \uac8c\uc7ac\ub41c \ucc28\ud2b8\uc5d0\uc11c \uace1\uc120\uc744 \ub514\uc9c0\ud0c0\uc774\uc988\ud568.<\/figcaption><\/figure>\n\n\n\n

\uc2dc\uc791 \uc628\ub3c4\uac00 \ub0ae\ub2e4\ub294 \uac83\uc740 \ud398\ub77c\uc774\ud2b8 \ud575\uc0dd\uc131\uc774 \uc9c0\uc5f0\ub418\uace0 \uac15\uc774 \ubca0\uc774\ub098\uc774\ud2b8\uac00 \ud615\uc131\ub418\ub294 \uc628\ub3c4 \ubc94\uc704\uc5d0\uc11c \ub354 \uc624\ub798 \uba38\ubb38\ub2e4\ub294 \uac83\uc744 \uc758\ubbf8\ud558\uba70, \uc774\ub294 \ubc14\ub85c \uc704\uc5d0\uc11c \uc124\uba85\ud55c \ubbf8\uc138\uc870\uc9c1 \ubcc0\ud654\uc785\ub2c8\ub2e4. \uc2e4\uc9c8\uc801\uc778 \uacb0\uacfc\ub294 HAZ \ub0b4 \ub2c8\uc624\ube00\uc774 \ubaa8\uc7ac\uc5d0\uc11c\uc758 \ud1b5\uc0c1\uc801\uc778 \uc5ed\ud560\uc778 \uacb0\uc815\ub9bd \ubbf8\uc138\ud654\ub97c \ud1b5\ud574\uc11c\ub9cc \uc791\uc6a9\ud558\ub294 \uac83\uc774 \uc544\ub2c8\ub77c, \uadf8\ub807\uc9c0 \uc54a\uc73c\uba74 \ubaa8\ub4e0 \uad6c \uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \uacb0\uc815\ub9bd\uacc4\ub97c \ub36e\uc744 \ud3f4\ub9ac\uace0\ub110 \ud398\ub77c\uc774\ud2b8\ub97c \uc5b5\uc81c\ud568\uc73c\ub85c\uc368\ub3c4 \uc791\uc6a9\ud55c\ub2e4\ub294 \uac83\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8\uc640 \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8-\uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \ubd84\uc728<\/h2>\n\n\n\n

\uba74\uc801 \ubd84\uc728\uc740 \ub974 \ud398\ub77c \uc5d0\uce6d \uc2dc\ud3b8\uc5d0\uc11c \uce21\uc815\ub418\uc5c8\uc73c\uba70, \ub450 \ud2b9\uc9d5\uc740 \ub2c8\uc624\ube00\uc5d0 \ub530\ub77c \ubc18\ub300 \ubc29\ud5a5\uc73c\ub85c \ubcc0\ud654\ud569\ub2c8\ub2e4. \uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8\ub294 \uc800\ud0c4\uc18c \uadf8\ub8f9\uc5d0\uc11c \ub2c8\uc624\ube00\uc5d0 \ub530\ub77c \uae09\uaca9\ud788 \uac10\uc18c\ud558\uace0 \uc911\ud0c4\uc18c \ubc0f \uace0\ud0c4\uc18c \uadf8\ub8f9\uc5d0\uc11c\ub294 \uc57d\uac04\ub9cc \uac10\uc18c\ud558\ub294\ub370, \ud574\ub2f9 \uc7a5\uc740 \uc774\ub97c \ub2c8\uc624\ube00 \ud0c4\ud654\ubb3c \uc11d\ucd9c\uc774 \uacbd\uacc4\ub85c \ud3b8\uc11d\ub418\uae30 \uc804\uc5d0 \ub2c8\uc624\ube00\uc758 \ub300\ubd80\ubd84\uc744 \uc18c\ubaa8\ud558\uae30 \ub54c\ubb38\uc73c\ub85c \uc124\uba85\ud569\ub2c8\ub2e4. \ud0c4\uc18c\ub2f9\ub7c9 \ub0b4\uc5d0\uc11c \ub9dd\uac04\uc774\ub098 \ud0c4\uc18c\ub97c \ubcc0\ud654\uc2dc\ud0a4\ub294 \uac83\uc740 \uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8 \ubd84\uc728\uc5d0 \uac70\uc758 \uc601\ud5a5\uc744 \ubbf8\uce58\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\"Grain
\uadf8\ub9bc 8. \uc138 \ud0c4\uc18c \uadf8\ub8f9\uc5d0 \ub300\ud55c \ub2c8\uc624\ube00 \ud568\ub7c9 \ub300\ube44 \uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8 \uba74\uc801 \ubd84\uc728. \ud0c4\uc18c \ucd95\uc740 \uc6d0\ub798 \ud50c\ub86f\uc758 \uc138 \ubc88\uc9f8 \ucc28\uc6d0\uc785\ub2c8\ub2e4. \uc6d0\ubb38 \uadf8\ub9bc\uc5d0\uc11c \uc7ac\ud604.<\/figcaption><\/figure>\n\n\n\n

\ud574\ub2f9 \uc7a5 \uc804\uccb4\uc5d0\uc11c MA\ub85c \ubd88\ub9ac\ub294 \ub9c8\ub974\ud150\uc0ac\uc774\ud2b8-\uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \uad6c\uc131\uc0c1\uc740 \uc800\ud0c4\uc18c \ubc0f \uc911\ud0c4\uc18c \uac15\uc5d0\uc11c \ub2c8\uc624\ube00\uc5d0 \ub530\ub77c \uc99d\uac00\ud558\uace0 \uace0\ud0c4\uc18c \uac15\uc5d0\uc11c\ub294 \uc99d\uac00\ud558\uc9c0 \uc54a\uc73c\uba70, \uadf8 \uc774\uc720\ub294 \ub3d9\uc77c\ud569\ub2c8\ub2e4. \uace0\uc815\ub41c \ub2c8\uc624\ube00 \ud568\ub7c9\uc5d0\uc11c \ub9dd\uac04\uc744 \ubcc0\ud654\uc2dc\ud0a4\uba74 \uadf8 \ud6a8\uacfc\ub294 \ub2c8\uc624\ube00 \ud6a8\uacfc\ubcf4\ub2e4 \ud6e8\uc52c \ud07d\ub2c8\ub2e4. 2.1% \ub9dd\uac04 \ubc0f \ud0c4\uc18c\ub2f9\ub7c9 0.40\uc5d0\uc11c MA \ubd84\uc728\uc740 5%\uc5d0 \ub2ec\ud574 \uacc4\uc5f4 \uc911 \ucd5c\uace0\uc774\uba70, 0.9% \ub9dd\uac04 \ubc0f \ud0c4\uc18c\ub2f9\ub7c9 0.30\uc5d0\uc11c\ub294 MA\uac00 \uc804\ud600 \ubc1c\uacac\ub418\uc9c0 \uc54a\uc558\uc73c\uba70, \uc800\uc790\ub4e4\uc740 \uc774 \uacb0\uacfc\ub97c 15\uac1c \uc774\uc0c1\uc758 \ubbf8\uc138\uc870\uc9c1 \uc0ac\uc9c4\uc5d0\uc11c \ud655\uc778\ud588\uc2b5\ub2c8\ub2e4. \uc774 \ub2e8\uc77c \ube44\uad50\ub294 \uc5b4\ub5a4 \uc6d0\uc18c\uac00 MA\ub97c \uc9c0\ubc30\ud558\ub294\uc9c0\uc5d0 \ub300\ud55c \ud574\ub2f9 \uc7a5\uc5d0\uc11c \uac00\uc7a5 \uba85\ud655\ud55c \uc9c4\uc220\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\uacbd\ub3c4\uc640 \uc0e4\ub974\ud53c \ucc9c\uc774 \uace1\uc120<\/h2>\n\n\n\n

\ubaa8\uc758 HAZ\uc758 \uacbd\ub3c4\ub294 \uc704\uc5d0\uc11c \uc124\uba85\ud55c \ud398\ub77c\uc774\ud2b8\uc5d0\uc11c \ubca0\uc774\ub098\uc774\ud2b8\ub85c\uc758 \ubcc0\ud654\uc640 \ud568\uaed8 \ud0c4\uc18c\uc640 \ub2c8\uc624\ube00 \ubaa8\ub450\uc5d0 \ub530\ub77c \uc99d\uac00\ud569\ub2c8\ub2e4. \ucc9c\uc774 \uac70\ub3d9\uc740 \uacbd\ub3c4\ubcf4\ub2e4 \uac15\ub4e4\uc744 \ub354 \ub69c\ub837\ud558\uac8c \uad6c\ubd84\ud569\ub2c8\ub2e4. \uac00\uc7a5 \ub0ae\uc740 \ucc9c\uc774 \uc628\ub3c4\ub294 \ub2c8\uc624\ube00 \ubb34\ucca8\uac00 \uc911\ud0c4\uc18c \uac15\uc778 KT4\uc5d0 \uc18d\ud569\ub2c8\ub2e4. 0.015% \ub2c8\uc624\ube00\uc758 \uc800\ud0c4\uc18c \uac15\uc778 KT2\uac00 \uadf8 \ub2e4\uc74c\uc774\uba70, \uc800\ub9dd\uac04 \uace0\ud0c4\uc18c \uac15\uc778 KT11\uc774 \uadf8 \ub4a4\ub97c \uc787\uc2b5\ub2c8\ub2e4. \uc774 \uc138 \uac15\uc740 \uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8\uc640 \uce68\uc0c1 \ud398\ub77c\uc774\ud2b8\uc758 \ubbf8\uc138\uc870\uc9c1\uc744 \uacf5\uc720\ud558\uba70 \uacbd\ub3c4\uc640 \uacb0\uc815\ub9bd \ud06c\uae30\uac00 \ub9e4\uc6b0 \uc720\uc0ac\ud558\uc5ec, \ud574\ub2f9 \uc7a5\uc5d0\uc11c \uce68\uc0c1 \ud398\ub77c\uc774\ud2b8\uac00 \ub354 \ub098\uc740 \uc778\uc131\uc744 \uac16\ub294 \uac83\uc73c\ub85c \ud3c9\uac00\ub418\ub294 \uc774\uc720\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\"Fracture
\uadf8\ub9bc 12. 7\uc885 \uac15\uc5d0 \ub300\ud55c \uc2dc\ud5d8 \uc628\ub3c4\uc5d0 \ub530\ub978 \ud30c\ub2e8 \uc678\uad00, 0, -20 \ubc0f -40 °C\uc5d0\uc11c. \uc6d0\ubb38 \uadf8\ub9bc\uc5d0\uc11c \uc7ac\ud604.<\/figcaption><\/figure>\n\n\n\n

\uac00\uc7a5 \ub098\uc05c \ub450 \uace1\uc120\uc740 \ud0c4\uc18c\ub2f9\ub7c9 0.40\uc758 \ucd5c\uace0\uce58\uc5d0 \uc788\ub294 \ub450 \uac15\uc778 KT8\uacfc KT10\uc5d0 \uc18d\ud569\ub2c8\ub2e4. KT10\uc740 \uacc4\uc5f4 \uc911 \uac00\uc7a5 \ub192\uc740 MA \ubd84\uc728\uc744, KT8\uc740 \uac00\uc7a5 \ub0ae\uc740 \uac83 \uc911 \ud558\ub098\ub97c \uac16\uc9c0\ub9cc, \uadf8\ub4e4\uc758 \ucc9c\uc774 \uace1\uc120\uc740 \uac70\uc758 \uacb9\uce69\ub2c8\ub2e4. \uc800\uc790\ub4e4\uc740 \ucc9c\uc774 \uc628\ub3c4\uac00 MA \ubd84\uc728\uc774 \uc544\ub2c8\ub77c \ubbf8\uc138\uc870\uc9c1 \ud2b9\uc9d5\uc5d0 \uc758\ud574 \uacb0\uc815\ub41c\ub2e4\ub294 \uacb0\ub860\uc744 \uc9c1\uc811 \ub3c4\ucd9c\ud558\uba70, \uc774\ub294 \uc774 \ubd84\uc57c\uc758 \uc774\uc804 \uc5f0\uad6c\uac00 \uc758\uacac\uc744 \ub2ec\ub9ac\ud588\ub358 \uc810\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n

\ucde8\uc131 \ud30c\uad34\uac00 \uc2dc\uc791\ub418\ub294 \uc704\uce58\uc640 6% \uaddc\uce59<\/h2>\n\n\n\n

\ubaa8\ub4e0 \uac15\uc5d0 \ub300\ud574 \ud30c\ub2e8\uba74\uc744 \uc870\uc0ac\ud558\uace0 \uac1c\uc2dc \uc704\uce58\ub97c \uadf8 \uc9c0\uc810\uc758 \ubbf8\uc138\uc870\uc9c1\uacfc \ub300\uc870\ud558\uc5ec \ubd84\ub958\ud588\uc2b5\ub2c8\ub2e4. \uc138 \ubc94\uc8fc\uac00 \ub098\uc654\uc2b5\ub2c8\ub2e4. \uae30\ubcf8 \uac15\uc740 \uad6c \uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \uacbd\uacc4 \uadfc\ucc98\uc758 \uc7ac\uc0dd \ud384\ub77c\uc774\ud2b8 \ucf5c\ub85c\ub2c8\uc5d0\uc11c \ud30c\ub2e8\ub418\uace0, \uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8 \uba74\uc801\uc774 \uc0c1\ub300\uc801\uc73c\ub85c \ud070 \uac15\uc740 \uadf8 \ud398\ub77c\uc774\ud2b8 \ub0b4\ubd80\uc5d0\uc11c \ud30c\ub2e8\ub429\ub2c8\ub2e4. \uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8\uac00 \uc587\uace0 \ubd88\uc5f0\uc18d\uc801\uc778 \uacbd\uc6b0 \ud30c\uad34\ub294 \uc11c\ub85c \ub2e4\ub978 \ubc29\uc704\ub97c \uac16\ub294 \ubca0\uc774\ub098\uc774\ud2b8 \ud328\ud0b7\uc758 \uad50\ucc28\uc810\uc5d0\uc11c \uc2dc\uc791\ub418\uc5b4 \ud328\ud0b7\uc744 \ud1b5\ud574 \uc804\ud30c\ub429\ub2c8\ub2e4. \ud30c\uad34 \ub2e8\uc704\ub294 -40 °C \uc2dc\ud3b8\uc5d0\uc11c \uce21\uc815\ub418\uc5c8\uc73c\uba70 \ubaa8\ub4e0 \uac15\uc5d0\uc11c \uc57d 90 µm\ub85c \ub098\ud0c0\ub098, \ub2c8\uc624\ube00\uc740 \uc774 \uc218\uc900\uc5d0\uc11c \ubcbd\uac1c \ub2e8\uc704\uc758 \ud06c\uae30\ub97c \ubcc0\ud654\uc2dc\ud0a4\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

\uac15\uc885<\/th>C %<\/th>Ceq<\/th>Nb %<\/th>\uacb0\uc815\ub9bd \ud06c\uae30, µm<\/th>\ubbf8\uc138\uad6c\uc870<\/th>G.B. \ud398\ub77c\uc774\ud2b8 %<\/th>MA %<\/th>\uac1c\uc2dc\uc810<\/th><\/tr><\/thead>
\uc800 C, \uc720\ub9ac Nb<\/td>0.05<\/td>0.3<\/td>0<\/td>348<\/td>\uc704\ub4dc\ub9cc\uc2a4\ud14c\ud150 \ud398\ub77c\uc774\ud2b8 \ubc0f \uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8\uc640 \uc18c\ub7c9\uc758 \ud384\ub77c\uc774\ud2b8<\/td>14<\/td>0.2<\/td>\uacb0\uc815\ub9bd\uacc4 \uadfc\ucc98\uc758 \uc7ac\uc0dd \ud384\ub77c\uc774\ud2b8<\/td><\/tr>
\uc800 C, Nb<\/td>0.05<\/td>0.3<\/td>0.03<\/td>207<\/td>\ub798\uc2a4 \uc870\uc9c1<\/td>5<\/td>1<\/td>\ubca0\uc774\ub098\uc774\ud2b8 \ud328\ud0b7\uc758 \uad50\ucc28\ubd80<\/td><\/tr>
\uc911 C, \uc720\ub9ac Nb<\/td>0.1<\/td>0.35<\/td>0<\/td>336<\/td>\uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8 \ubc0f \uc704\ub4dc\ub9cc\uc2a4\ud14c\ud150 \ud398\ub77c\uc774\ud2b8\uc640 \uce68\uc0c1 \ud398\ub77c\uc774\ud2b8<\/td>6<\/td>0.5<\/td>\uacb0\uc815\ub9bd\uacc4\uc5d0\uc11c<\/td><\/tr>
\uc911 C, Nb<\/td>0.1<\/td>0.35<\/td>0.03<\/td>248<\/td>\ub798\uc2a4 \uc870\uc9c1<\/td>2<\/td>2<\/td>\ubca0\uc774\ub098\uc774\ud2b8 \ud328\ud0b7\uc758 \uad50\ucc28\ubd80<\/td><\/tr>
\uace0 C, \uc720\ub9ac Nb<\/td>0.15<\/td>0.4<\/td>0<\/td>342<\/td>\uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8 \ubc0f \uc704\ub4dc\ub9cc\uc2a4\ud14c\ud150 \ud398\ub77c\uc774\ud2b8\uc640 \uce68\uc0c1 \ud398\ub77c\uc774\ud2b8<\/td>6<\/td>0.5<\/td>\uacb0\uc815\ub9bd\uacc4\uc5d0\uc11c<\/td><\/tr>
\uace0 C, Nb<\/td>0.15<\/td>0.4<\/td>0.03<\/td>230<\/td>\ub798\uc2a4 \uc870\uc9c1<\/td>1.8<\/td>1<\/td>\ubca0\uc774\ub098\uc774\ud2b8 \ud328\ud0b7\uc758 \uad50\ucc28\ubd80<\/td><\/tr>
\uc800 C, \uace0 Mn<\/td>0.05<\/td>0.4<\/td>0.015<\/td>236<\/td>\ub798\uc2a4 \uc870\uc9c1<\/td>2.5<\/td>5<\/td>\ubca0\uc774\ub098\uc774\ud2b8 \ud328\ud0b7\uc758 \uad50\ucc28\ubd80<\/td><\/tr>
\uace0 C, \uc800 Mn<\/td>0.15<\/td>0.3<\/td>0.015<\/td>330<\/td>\uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8 \ubc0f \uc704\ub4dc\ub9cc\uc2a4\ud14c\ud150 \ud398\ub77c\uc774\ud2b8\uc640 \uce68\uc0c1 \ud398\ub77c\uc774\ud2b8<\/td>6<\/td>0<\/td>\uacb0\uc815\ub9bd\uacc4\uc5d0\uc11c<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\ucd9c\ucc98, \uc6d0\ubb38 2\uc7a5\uc758 \ud45c 2(PDF 113\ucabd). \uacb0\uc815\ub9bd \ud06c\uae30, \ubbf8\uc138\uc870\uc9c1, \uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8 \ubd84\uc728, MA \ubd84\uc728, \uadf8\ub9ac\uace0 \uc601\ud558 40 \u00b0C\uc5d0\uc11c \ud30c\ub2e8\ub41c \uc2dc\ud3b8\uc5d0\uc11c \uad00\ucc30\ub41c \uac1c\uc2dc\uc810.<\/em><\/p>\n\n\n\n

\ud45c\ub97c \uc870\uc131\ubcf4\ub2e4 \uc785\uacc4 \ud398\ub77c\uc774\ud2b8 \ubd84\uc728\ub85c \uc77d\uc73c\uba74 \uba85\ud655\ud788 \uad6c\ubd84\ub41c\ub2e4. 6% \uc774\uc0c1\uc778 \ubaa8\ub4e0 \uac15\uc740 \uc785\uacc4 \ud398\ub77c\uc774\ud2b8 \ub610\ub294 \uadf8 \uc606\uc758 \ud384\ub77c\uc774\ud2b8\uc5d0\uc11c \ud30c\ub2e8\ub418\uc5c8\uace0, 6% \ubbf8\ub9cc\uc778 \ubaa8\ub4e0 \uac15\uc740 \ud328\ud0b7 \uad50\ucc28\ubd80\uc5d0\uc11c \ud30c\ub2e8\ub418\uc5c8\ub2e4. \ucc55\ud130\uc5d0\uc11c \uc81c\uc2dc\ud558\ub294 \ubb3c\ub9ac\uc801 \uc774\uc720\ub294 \uacbd\ub3c4 \ucc28\uc774\ub85c, \uc785\uacc4 \ud398\ub77c\uc774\ud2b8\ub294 \uacb0\uc815\ub9bd \ub0b4\ubd80\ubcf4\ub2e4 \uc57d 100 HV \ub0ae\uae30 \ub54c\ubb38\uc5d0 \uc5f0\uc18d\uc801\uc778 \uc785\uacc4\uce35\uc774 \uc751\ub825\uc744 \uc9d1\uc911\uc2dc\ucf1c \uadf8\uacf3\uc5d0\uc11c \uade0\uc5f4\uc774 \ubc1c\uc0dd\ud55c\ub2e4. 6% \ubbf8\ub9cc\uc5d0\uc11c\ub294 \uc774 \uce35\uc774 \ubaa8\ub4e0 \uacb0\uc815\ub9bd\uc744 \ub36e\uc9c0 \ubabb\ud558\uace0, \uae30\uc9c0\ub294 \ub300\ubd80\ubd84 \ub798\uc2a4 \ubc29\ud5a5\uc73c\ub85c \uc815\ub82c\ub41c MA\ub97c \uac00\uc9c4 \ubca0\uc774\ub098\uc774\ud2b8\uc774\uba70, \uc751\ub825 \uc9d1\uc911\uc740 \ud328\ud0b7 \uacbd\uacc4\ub85c \uc774\ub3d9\ud55c\ub2e4.<\/p>\n\n\n\n

\"Relationship
\uadf8\ub9bc 16. \uc785\uacc4 \ud398\ub77c\uc774\ud2b8 \uba74\uc801 \ubd84\uc728\uc5d0 \ub300\ud55c \ub450 \uac00\uc9c0 \ud30c\ub2e8 \uac70\ub3d9\uc73c\ub85c, 6%\uac00 \uc5f0\uc18d \ubc0f \ubd88\uc5f0\uc18d \uc785\uacc4 \uacbd\ub85c\uc758 \uacbd\uacc4\uc120\uc774\ub2e4. \ucd9c\ucc98 \uadf8\ub9bc\uc5d0\uc11c \uc7ac\ud604.<\/figcaption><\/figure>\n\n\n\n

\ucc55\ud130\ub294 6%\ub77c\ub294 \uc218\uce58\uac00 \uc5b4\ub514\uae4c\uc9c0 \uc801\uc6a9\ub420 \uc218 \uc788\ub294\uc9c0\uc5d0 \uc8fc\uc758\ud55c\ub2e4. \uc785\uacc4 \ud398\ub77c\uc774\ud2b8 \ubd84\uc728\uc740 \uc870\uc131, \uc5f4 \uc0ac\uc774\ud074 \ubc0f \uc774\uc804 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8 \uacb0\uc815\ub9bd \ud06c\uae30\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9c0\ubbc0\ub85c, \uc774 \uc218\uce58\ub294 \uc774 \uc5f4 \uc0ac\uc774\ud074 \ud558\uc758 \uc774 \uac15\uc885\uad70\uc5d0 \ub300\ud55c \uae30\uc900\uc774\uba70 \ubaa8\ub4e0 HSLA \ub4f1\uae09\uc5d0 \ub300\ud55c \ubcf4\ud3b8\uc801 \uc784\uacc4\uac12\uc740 \uc544\ub2c8\ub2e4.<\/p>\n\n\n\n

\ub9dd\uac04\uc774 MA \ubd84\uc728\uc744 \uacb0\uc815\ud558\ub294 \uc774\uc720<\/h2>\n\n\n\n

\uc81c\uc548\ub41c \uba54\ucee4\ub2c8\uc998\uc740 \uc785\uacc4 \ud398\ub77c\uc774\ud2b8\uac00 \uc131\uc7a5\ud558\uba74\uc11c \ud0c4\uc18c\uc640 \ud569\uae08 \uc6d0\uc18c\ub97c \uc804\ubc29\uc758 \uc624\uc2a4\ud14c\ub098\uc774\ud2b8\ub85c \ubc30\ucd9c\ud558\uc5ec \ud398\ub77c\uc774\ud2b8\uc640 \ubca0\uc774\ub098\uc774\ud2b8 \uc0ac\uc774\uc758 \uc601\uc5ed\uc774 \ub18d\ud654\ub418\uace0, \ucd94\uac00 \ub0c9\uac01 \uc2dc \uc77c\ubd80\uac00 MA\ub85c \ubcc0\ud0dc\ud55c\ub2e4\ub294 \uac83\uc774\ub2e4. \uc2dc\ubbac\ub808\uc774\uc158 \uc2dc\ud3b8\uc5d0 \ub300\ud55c \uc804\uc790 \ub9c8\uc774\ud06c\ub85c\ud504\ub85c\ube0c \uc120 \uc2a4\uce94\uc740 \uc774 \ub18d\ud654\ub97c \ud655\uc778\ud55c\ub2e4. \ud0c4\uc18c\uc640 \ub9dd\uac04 \ubaa8\ub450 \ud3b8\uc11d\ub418\uba70, 2.1% \ub9dd\uac04\uac15\uc5d0\uc11c\ub294 \ub9dd\uac04\uc774 \ud0c4\uc18c\ubcf4\ub2e4 \ub354 \uac15\ud558\uac8c \ud3b8\uc11d\ub41c\ub2e4.<\/p>\n\n\n\n

0.9% \ub9dd\uac04\uac15\uc740 \uc774 \uba54\ucee4\ub2c8\uc998\uc758 \uac80\uc99d\uc774\ub2e4. \uc785\uacc4\uc5d0\uc11c \uba85\ud655\ud55c \ud0c4\uc18c \ub18d\ud654\ub97c \ubcf4\uc774\uc9c0\ub9cc \ub9dd\uac04 \ud3b8\uc11d\uc740 \uc57d\ud558\uba70, MA\ub97c \uc804\ud600 \ud568\uc720\ud558\uc9c0 \uc54a\ub294\ub2e4. \ub530\ub77c\uc11c \uc800\uc790\ub4e4\uc740 \ud0c4\uc18c \ub18d\ud654\uc640 \ud569\uae08 \uc6d0\uc18c \ud3b8\uc11d\uc774\ub77c\ub294 \ub450 \uc870\uac74\uc774 \ub3d9\uc2dc\uc5d0 \ud544\uc694\ud558\ub2e4\uace0 \ubcf4\uace0, \ub2c8\uc624\ube00 \uc790\uccb4\ub294 0.015%\uc5d0\uc11c \uce21\uc815 \uac00\ub2a5\ud55c \ud3b8\uc11d\uc744 \ubcf4\uc774\uc9c0 \uc54a\uc558\uc73c\uba70 \uc774\ub294 \ud504\ub85c\ube0c\uac00 \ubd84\ud574\ud558\uae30\uc5d0 \ub108\ubb34 \ub0ae\uc740 \uc218\uc900\uc774\ub77c\uace0 \uc5b8\uae09\ud55c\ub2e4. \uc774\ub294 \ub9dd\uac04 \ubcc0\uc885\uc774 \ub3d9\uc77c \uc218\uc900\uc758 \ub2c8\uc624\ube00 \ucca8\uac00\ubcf4\ub2e4 MA \ubd84\uc728\uc744 \ub354 \ud06c\uac8c \ubcc0\ud654\uc2dc\ud0a4\ub294 \uc774\uc720\uc640, 2.1% \ub9dd\uac04\uac15\uc774 \uc2dc\ub9ac\uc988\uc5d0\uc11c \ucd5c\uace0 MA \ubd84\uc728\uc778 5%\uc5d0 \ub3c4\ub2ec\ud55c \ubc18\uba74 1.5% \ub9dd\uac04 \uae30\ubcf8\uac15\uc740 0.2%\uc778 \uc774\uc720\ub97c \uc124\uba85\ud55c\ub2e4.<\/p>\n\n\n\n

\uac15\uc7ac \uc8fc\ubb38\uc5d0 \ub300\ud55c \uc2dc\uc0ac\uc810<\/h2>\n\n\n\n

\uc774 \uacb0\uacfc\ub294 \uc6a9\uc811\ubd80 \uc778\uc131\uc774 \uc694\uad6c\uc0ac\ud56d\uc77c \ub54c HSLA \ud6c4\ud310 \uad6c\ub9e4\uc790\uac00 \uc694\uad6c\ud574\uc57c \ud560 \uc138 \uac00\uc9c0 \uc218\uce58\ub97c \uc81c\uc2dc\ud55c\ub2e4. \uccab\uc9f8\ub294 \ud0c4\uc18c\ub2f9\ub7c9\uc73c\ub85c, \ubcc0\ud0dc \uc628\ub3c4\uc640 \uc870\ub9bd\uc5ed HAZ\uc758 \ubca0\uc774\ub098\uc774\ud2b8 \uc591\uc744 \ubaa8\ub450 \uacb0\uc815\ud55c\ub2e4. \ub458\uc9f8\ub294 \ud574\ub2f9 \ud0c4\uc18c\ub2f9\ub7c9\uc5d0 \ub300\ud55c \ub9dd\uac04 \uc218\uc900\uc73c\ub85c, \ub9dd\uac04\uc740 MA \ud615\uc131 \uc5ec\ubd80\ub97c \uacb0\uc815\ud558\ub294 \uc6d0\uc18c\uc774\ub2e4. \uc14b\uc9f8\ub294 \ubaa8\uc7ac \uacb0\uacfc\uac00 \uc544\ub2cc \ucd5c\uc800 \uc0ac\uc6a9 \uc628\ub3c4\uc5d0\uc11c\uc758 \uc2dc\ubbac\ub808\uc774\uc158 HAZ \uc0e4\ub974\ud53c \uacb0\uacfc\ub85c, \ubaa8\uc7ac \ud2b9\uc131\uc740 \uc6a9\uc811\ubd80 \uc606 \uc870\ub9bd\uc5ed\uc5d0 \ub300\ud574 \uc544\ubb34\uac83\ub3c4 \ub9d0\ud574\uc8fc\uc9c0 \uc54a\ub294\ub2e4.<\/p>\n\n\n\n

1.5% \ub9dd\uac04\uc5d0\uc11c 0.015~0.03%\uc758 \ub2c8\uc624\ube00\uc740 \ubcf8 \uc5f0\uad6c\uc5d0\uc11c \uc785\uacc4 \ud398\ub77c\uc774\ud2b8\uac00 6% \ubbf8\ub9cc\uc778 \ubbf8\uc138 \ubca0\uc774\ub098\uc774\ud2b8 \uc870\uc9c1\uc744 \uc0dd\uc131\ud55c \uc870\uac74\uc774\uba70, \ud574\ub2f9 \uac15\ub4e4\uc740 \uc785\uacc4\ub97c \ub530\ub77c\uac00 \uc544\ub2cc \ud328\ud0b7 \uad50\ucc28\ubd80\uc5d0\uc11c \ud30c\ub2e8\ub418\uc5c8\ub2e4. 2.1% \ub9dd\uac04\uc5d0\uc11c \ub3d9\uc77c\ud55c \ub2c8\uc624\ube00 \ucca8\uac00\ub294 \ucd5c\uace0 MA \ubd84\uc728\uacfc \ub450 \uac1c\uc758 \ucd5c\uc545 \uc804\uc774 \uace1\uc120 \uc911 \ud558\ub098\ub97c \uc0dd\uc131\ud588\uc73c\ubbc0\ub85c, \ub2c8\uc624\ube00 \ub2e8\ub3c5\uc73c\ub85c\ub294 \uc778\uc131 \ucca8\uac00 \uc6d0\uc18c\uac00 \uc544\ub2c8\ub2e4. \ub2c8\uc624\ube00\uacfc \ud2f0\ud0c0\ub284\uc774 \ubaa8\uc7ac\uc5d0\uc11c \uac15\ub3c4\ub97c \ub192\uc774\ub294 \uc57c\uae08\ud559\uc801 \ubc30\uacbd\uc740 \ub2e4\uc74c\uc744 \ucc38\uc870\ud558\uc2ed\uc2dc\uc624 \ubbf8\uc138\ud569\uae08\uac15 \uac15\ud654 \uba54\ucee4\ub2c8\uc998<\/a>, \uadf8\ub9ac\uace0 \uc774 \uc2e4\ud5d8 \uc6a9\uac15\uc758 \uc870\uc131\uc774 \ubaa8\ub378\ub85c \uc0bc\uc740 \uc2a4\ud2b8\ub9bd \ub4f1\uae09\uc740 \ub2e4\uc74c\uc744 \ucc38\uc870\ud558\uc2ed\uc2dc\uc624 \ubbf8\uc138\ud569\uae08 \uc2a4\ud2b8\ub9bd\uac15 \uc870\uc131<\/a>. \ub3d9\uc77c \ub4f1\uae09 \uc800\ud569\uae08\uac15\uc758 \ud15c\ud37c\ub9c1 \uac70\ub3d9\uc740 \ub2e4\uc74c\uc5d0\uc11c \ub2e4\ub8f9\ub2c8\ub2e4 \uc800\ud569\uae08\uac15 \ud15c\ud37c\ub9c1 \ub3d9\uc5ed\ud559<\/a>.<\/p>\n\n\n\n

\ucd9c\ucc98: Alloy Steel, Properties and Use, InTech, 2011, Chapter 4, Tables 1 and 2 and Figures 1, 4, 8, 12 and 16 (PDF 99~113\ud398\uc774\uc9c0), CC BY 3.0 \ub77c\uc774\uc120\uc2a4. \uc774 \ucc55\ud130\ub294 \uc778\uc6a9\ud55c \ucc38\uace0\ubb38\ud5cc\uc5d0\uc11c \uc6d0\ub798 \ubc1c\ud45c\ub41c \uc5f0\uad6c\ub97c \ubcf4\uace0\ud55c\ub2e4. \uc774 \ud398\uc774\uc9c0\uc758 \ubaa8\ub4e0 \ud45c\uc640 \uadf8\ub9bc\uc740 \ucd9c\ucc98 PDF\uc5d0\uc11c 300 dpi\ub85c \ub80c\ub354\ub9c1\ud558\uc5ec \uc704 \ud14d\uc2a4\ud2b8\ub97c \uc791\uc131\ud558\uae30 \uc804\uc5d0 \uc140 \ub2e8\uc704\ub85c \ud310\ub3c5\ud588\uc73c\uba70, \uc218\uce58\ub294 \ucd9c\ucc98 \ud14d\uc2a4\ud2b8 \ub808\uc774\uc5b4\uc640 \ub300\uc870 \ud655\uc778\ud558\uc600\uace0 \ub458\uc774 \ub2e4\ub97c \uacbd\uc6b0 \ub80c\ub354\ub9c1\ub41c \uc774\ubbf8\uc9c0\ub97c \uae30\uc900\uc73c\ub85c \uc0bc\uc558\ub2e4. \uc774 \ud398\uc774\uc9c0\ub294 \ubc1c\ud45c\ub41c \uc5f0\uad6c\uc758 \ucc38\uace0 \uc694\uc57d\uc774\uba70 Aobo Steel\uc758 \uc0ac\uc591\uc774 \uc544\ub2c8\ubbc0\ub85c, \uc218\uce58\ub97c \uacf5\uc815 \uc2dc\ud2b8\uc5d0 \uae30\uc7ac\ud558\uae30 \uc804\uc5d0 \ub4f1\uae09\uacfc \uc6a9\uc811 \uc808\ucc28\ub97c \ud655\uc778\ud558\uc2ed\uc2dc\uc624.<\/p>","protected":false},"excerpt":{"rendered":"

Niobium HSLA HAZ Toughness A single weld thermal cycle that peaks at 1400 °C coarsens the prior austenite grains in the heat affected zone, and the microstructure it leaves behind is usually the weakest part of a welded joint. This study runs eleven experimental C-Mn steels through one such cycle, three carbon levels crossed with […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"normal-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-23612","page","type-page","status-publish","hentry"],"yoast_head":"\nNiobium HAZ Toughness in HSLA Steel, Grain Boundary Ferrite<\/title>\n<meta name=\"description\" content=\"Eleven experimental C-Mn steels through a 1400 C weld cycle, showing how niobium, carbon and manganese set grain boundary ferrite, MA fraction and HAZ toughness.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/aobosteel.com\/ko\/niobium-hsla-haz-toughness\/\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Niobium HSLA HAZ Toughness\" \/>\n<meta property=\"og:description\" content=\"Eleven experimental C-Mn steels through a 1400 C weld cycle, showing how niobium, carbon and manganese set grain boundary ferrite, MA fraction and HAZ toughness.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/aobosteel.com\/ko\/niobium-hsla-haz-toughness\/\" \/>\n<meta property=\"og:site_name\" content=\"AoboSteel\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/profile.php?id=61565368220197\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-25T23:42:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/Aobo-Steel-Niobium-HAZ-Toughness-fig-1-thermal-cycle.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\uc608\uc0c1 \ub418\ub294 \ud310\ub3c5 \uc2dc\uac04\" \/>\n\t<meta name=\"twitter:data1\" content=\"11\ubd84\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"TechArticle\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/niobium-hsla-haz-toughness\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/niobium-hsla-haz-toughness\\\/\"},\"author\":{\"name\":\"Evan\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/person\\\/96118415c30ca6bb52eaf1127b052ef7\"},\"headline\":\"Niobium HSLA HAZ Toughness\",\"datePublished\":\"2026-10-18T18:40:10+00:00\",\"dateModified\":\"2026-10-25T23:42:13+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/niobium-hsla-haz-toughness\\\/\"},\"wordCount\":2240,\"publisher\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/niobium-hsla-haz-toughness\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/Aobo-Steel-Niobium-HAZ-Toughness-fig-1-thermal-cycle.jpg\",\"inLanguage\":\"ko-KR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/niobium-hsla-haz-toughness\\\/\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/niobium-hsla-haz-toughness\\\/\",\"name\":\"Niobium HAZ Toughness in HSLA Steel, Grain Boundary Ferrite\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/niobium-hsla-haz-toughness\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/niobium-hsla-haz-toughness\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/Aobo-Steel-Niobium-HAZ-Toughness-fig-1-thermal-cycle.jpg\",\"datePublished\":\"2026-10-18T18:40:10+00:00\",\"dateModified\":\"2026-10-25T23:42:13+00:00\",\"description\":\"Eleven experimental C-Mn steels through a 1400 C weld cycle, showing how niobium, carbon and manganese set grain boundary ferrite, MA fraction and HAZ toughness.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/niobium-hsla-haz-toughness\\\/#breadcrumb\"},\"inLanguage\":\"ko-KR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/aobosteel.com\\\/niobium-hsla-haz-toughness\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"ko-KR\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/niobium-hsla-haz-toughness\\\/#primaryimage\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/Aobo-Steel-Niobium-HAZ-Toughness-fig-1-thermal-cycle.jpg\",\"contentUrl\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/Aobo-Steel-Niobium-HAZ-Toughness-fig-1-thermal-cycle.jpg\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/niobium-hsla-haz-toughness\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\\\/\\\/aobosteel.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Niobium HSLA HAZ Toughness\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#website\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/\",\"name\":\"AoboSteel\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/aobosteel.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"ko-KR\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#organization\",\"name\":\"AoboSteel\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ko-KR\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/01\\\/cropped-aobo-steel-1.avif\",\"contentUrl\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/01\\\/cropped-aobo-steel-1.avif\",\"width\":1052,\"height\":592,\"caption\":\"AoboSteel\"},\"image\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/profile.php?id=61565368220197\",\"https:\\\/\\\/www.linkedin.com\\\/in\\\/aobosteel-evan\\\/\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/person\\\/96118415c30ca6bb52eaf1127b052ef7\",\"name\":\"Evan\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ko-KR\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g\",\"caption\":\"Evan\"},\"sameAs\":[\"http:\\\/\\\/www.aobosteel.com\",\"https:\\\/\\\/www.facebook.com\\\/profile.php?id=61565368220197\",\"https:\\\/\\\/www.instagram.com\\\/aobosteel\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/in\\\/aobosteel-evan\\\/\",\"https:\\\/\\\/x.com\\\/AobosteelEvan\",\"https:\\\/\\\/www.youtube.com\\\/@aobosteel\"],\"url\":\"https:\\\/\\\/aobosteel.com\\\/ko\\\/blog\\\/author\\\/admin\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"HSLA \uac15 \ub2c8\uc624\ube00 HAZ \uc778\uc131, \uc785\uacc4 \ud398\ub77c\uc774\ud2b8","description":"11\uc885\uc758 \uc2e4\ud5d8\uc6a9 C-Mn \uac15\uc7ac\ub97c 1400 C \uc6a9\uc811 \uc0ac\uc774\ud074\ub85c \uc2dc\ud5d8\ud558\uc5ec \ub2c8\uc624\ube00, \ud0c4\uc18c, \ub9dd\uac04\uc774 \uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8, MA \ubd84\uc728, HAZ \uc778\uc131\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/aobosteel.com\/ko\/niobium-hsla-haz-toughness\/","og_locale":"ko_KR","og_type":"article","og_title":"Niobium HSLA HAZ Toughness","og_description":"Eleven experimental C-Mn steels through a 1400 C weld cycle, showing how niobium, carbon and manganese set grain boundary ferrite, MA fraction and HAZ toughness.","og_url":"https:\/\/aobosteel.com\/ko\/niobium-hsla-haz-toughness\/","og_site_name":"AoboSteel","article_publisher":"https:\/\/www.facebook.com\/profile.php?id=61565368220197","article_modified_time":"2026-10-25T23:42:13+00:00","og_image":[{"url":"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/Aobo-Steel-Niobium-HAZ-Toughness-fig-1-thermal-cycle.jpg","type":"","width":"","height":""}],"twitter_card":"summary_large_image","twitter_misc":{"\uc608\uc0c1 \ub418\ub294 \ud310\ub3c5 \uc2dc\uac04":"11\ubd84"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"TechArticle","@id":"https:\/\/aobosteel.com\/niobium-hsla-haz-toughness\/#article","isPartOf":{"@id":"https:\/\/aobosteel.com\/niobium-hsla-haz-toughness\/"},"author":{"name":"Evan","@id":"https:\/\/aobosteel.com\/#\/schema\/person\/96118415c30ca6bb52eaf1127b052ef7"},"headline":"Niobium HSLA HAZ Toughness","datePublished":"2026-10-18T18:40:10+00:00","dateModified":"2026-10-25T23:42:13+00:00","mainEntityOfPage":{"@id":"https:\/\/aobosteel.com\/niobium-hsla-haz-toughness\/"},"wordCount":2240,"publisher":{"@id":"https:\/\/aobosteel.com\/#organization"},"image":{"@id":"https:\/\/aobosteel.com\/niobium-hsla-haz-toughness\/#primaryimage"},"thumbnailUrl":"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/Aobo-Steel-Niobium-HAZ-Toughness-fig-1-thermal-cycle.jpg","inLanguage":"ko-KR"},{"@type":"WebPage","@id":"https:\/\/aobosteel.com\/niobium-hsla-haz-toughness\/","url":"https:\/\/aobosteel.com\/niobium-hsla-haz-toughness\/","name":"HSLA \uac15 \ub2c8\uc624\ube00 HAZ \uc778\uc131, \uc785\uacc4 \ud398\ub77c\uc774\ud2b8","isPartOf":{"@id":"https:\/\/aobosteel.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/aobosteel.com\/niobium-hsla-haz-toughness\/#primaryimage"},"image":{"@id":"https:\/\/aobosteel.com\/niobium-hsla-haz-toughness\/#primaryimage"},"thumbnailUrl":"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/Aobo-Steel-Niobium-HAZ-Toughness-fig-1-thermal-cycle.jpg","datePublished":"2026-10-18T18:40:10+00:00","dateModified":"2026-10-25T23:42:13+00:00","description":"11\uc885\uc758 \uc2e4\ud5d8\uc6a9 C-Mn \uac15\uc7ac\ub97c 1400 C \uc6a9\uc811 \uc0ac\uc774\ud074\ub85c \uc2dc\ud5d8\ud558\uc5ec \ub2c8\uc624\ube00, \ud0c4\uc18c, \ub9dd\uac04\uc774 \uacb0\uc815\ub9bd\uacc4 \ud398\ub77c\uc774\ud2b8, MA \ubd84\uc728, HAZ \uc778\uc131\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.","breadcrumb":{"@id":"https:\/\/aobosteel.com\/niobium-hsla-haz-toughness\/#breadcrumb"},"inLanguage":"ko-KR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/aobosteel.com\/niobium-hsla-haz-toughness\/"]}]},{"@type":"ImageObject","inLanguage":"ko-KR","@id":"https:\/\/aobosteel.com\/niobium-hsla-haz-toughness\/#primaryimage","url":"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/Aobo-Steel-Niobium-HAZ-Toughness-fig-1-thermal-cycle.jpg","contentUrl":"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/Aobo-Steel-Niobium-HAZ-Toughness-fig-1-thermal-cycle.jpg"},{"@type":"BreadcrumbList","@id":"https:\/\/aobosteel.com\/niobium-hsla-haz-toughness\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/aobosteel.com\/"},{"@type":"ListItem","position":2,"name":"Niobium HSLA HAZ Toughness"}]},{"@type":"WebSite","@id":"https:\/\/aobosteel.com\/#website","url":"https:\/\/aobosteel.com\/","name":"\uc544\uc624\ubcf4\uc2a4\ud2f8","description":"","publisher":{"@id":"https:\/\/aobosteel.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/aobosteel.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"ko-KR"},{"@type":"Organization","@id":"https:\/\/aobosteel.com\/#organization","name":"\uc544\uc624\ubcf4\uc2a4\ud2f8","url":"https:\/\/aobosteel.com\/","logo":{"@type":"ImageObject","inLanguage":"ko-KR","@id":"https:\/\/aobosteel.com\/#\/schema\/logo\/image\/","url":"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/cropped-aobo-steel-1.avif","contentUrl":"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/cropped-aobo-steel-1.avif","width":1052,"height":592,"caption":"AoboSteel"},"image":{"@id":"https:\/\/aobosteel.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/profile.php?id=61565368220197","https:\/\/www.linkedin.com\/in\/aobosteel-evan\/"]},{"@type":"Person","@id":"https:\/\/aobosteel.com\/#\/schema\/person\/96118415c30ca6bb52eaf1127b052ef7","name":"\uc5d0\ubc18","image":{"@type":"ImageObject","inLanguage":"ko-KR","@id":"https:\/\/secure.gravatar.com\/avatar\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g","caption":"Evan"},"sameAs":["http:\/\/www.aobosteel.com","https:\/\/www.facebook.com\/profile.php?id=61565368220197","https:\/\/www.instagram.com\/aobosteel\/","https:\/\/www.linkedin.com\/in\/aobosteel-evan\/","https:\/\/x.com\/AobosteelEvan","https:\/\/www.youtube.com\/@aobosteel"],"url":"https:\/\/aobosteel.com\/ko\/blog\/author\/admin\/"}]}},"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"trp-custom-language-flag":false},"uagb_author_info":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/ko\/blog\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"Niobium HSLA HAZ Toughness A single weld thermal cycle that peaks at 1400 °C coarsens the prior austenite grains in the heat affected zone, and the microstructure it leaves behind is usually the weakest part of a welded joint. This study runs eleven experimental C-Mn steels through one such cycle, three carbon levels crossed with…","rttpg_featured_image_url":null,"rttpg_author":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/ko\/blog\/author\/admin\/"},"rttpg_comment":0,"rttpg_category":null,"rttpg_excerpt":"Niobium HSLA HAZ Toughness A single weld thermal cycle that peaks at 1400 °C coarsens the prior austenite grains in the heat affected zone, and the microstructure it leaves behind is usually the weakest part of a welded joint. This study runs eleven experimental C-Mn steels through one such cycle, three carbon levels crossed with…","_links":{"self":[{"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/pages\/23612","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/comments?post=23612"}],"version-history":[{"count":3,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/pages\/23612\/revisions"}],"predecessor-version":[{"id":24527,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/pages\/23612\/revisions\/24527"}],"wp:attachment":[{"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/media?parent=23612"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}