{"id":11734,"date":"2026-01-04T11:32:34","date_gmt":"2026-01-04T03:32:34","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=11734"},"modified":"2026-06-06T11:46:39","modified_gmt":"2026-06-06T03:46:39","slug":"o2-tool-steel-heat-treatment","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/o2-tool-steel-heat-treatment\/","title":{"rendered":"Guia de Tratamento T\u00e9rmico do A\u00e7o Ferramenta O2"},"content":{"rendered":"
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In\u00edcio<\/mark> <\/a>> Centro T\u00e9cnico de Tratamento T\u00e9rmico de A\u00e7os para Ferramentas<\/mark> <\/a> Guia de Tratamento T\u00e9rmico do A\u00e7o Ferramenta O2<\/h6><\/div>\n\n\n\n

Aobo Steel | Fornecedor global de a\u00e7o para ferramentas na China<\/em><\/h4><\/div>\n\n\n\n

Guia de Tratamento T\u00e9rmico do A\u00e7o Ferramenta O2<\/h1>

Diretrizes de tratamento t\u00e9rmico para a\u00e7o ferramenta O2 (DIN 1.2842\/JIS SKS31), com foco na resist\u00eancia ao desgaste, usinabilidade e estabilidade dimensional para aplica\u00e7\u00f5es em ferramentas de trabalho a frio.<\/p><\/div>\n\n\n\n

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Solicite uma consulta r\u00e1pida<\/a><\/div>\n<\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n
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A\u00e7o para ferramentas O2<\/a> is an oil-quenched cold work tool steel with high hardness, high wear resistance, and minimal deformation during heat treatment. Compared with water-quenched steel, O2 steel exhibits better dimensional stability and higher toughness after complete quenching\u00a011<\/a><\/sup>. Os graus equivalentes de a\u00e7o para ferramentas O2 incluem:<\/p>\n\n\n\n

Padr\u00e3o<\/th>Grau<\/th><\/tr><\/thead>
EN\/DIN<\/td>1,2842 \/ 90MnCrV8<\/td><\/tr>
JIS<\/td>SKS31<\/td><\/tr>
GB<\/td>9Mn2V<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Lista de verifica\u00e7\u00e3o r\u00e1pida do tratamento t\u00e9rmico do a\u00e7o ferramenta O2<\/h2>\n\n\n\n

Siga estes passos sequenciais para o tratamento t\u00e9rmico adequado do a\u00e7o ferramenta O2: pr\u00e9-aquecimento, t\u00eampera (austenitiza\u00e7\u00e3o), t\u00eampera em \u00f3leo e revenido.
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  1. Pr\u00e9-aquecimento<\/strong><\/strong>

    Preheat to 649\u2013677\u00b0C (1200\u20131250\u00b0F) until evenly heated. Reduces thermal shock and the risk of deformation or cracking.<\/p> <\/li>

  2. Austenitiza\u00e7\u00e3o (endurecimento)<\/strong><\/strong>

    Heat to 760\u2013800\u00b0C (1400\u20131472\u00b0F). Alloy carbides dissolve, and the microstructure transforms to austenite.<\/p> <\/li>

  3. Resfriamento<\/strong><\/strong>

    Quench in oil. Stop when the workpiece reaches 66\u201393\u00b0C (150\u2013200\u00b0F).<\/p> <\/li>

  4. T\u00eampera<\/strong><\/strong>

    Begin immediately once the workpiece cools to 52\u201365\u00b0C (125\u2013150\u00b0F). Temper at 150\u2013260\u00b0C (300\u2013500\u00b0F). Minimum soak: 2 hours per inch (4.7 min\/mm) of cross-section.<\/p> <\/li><\/ol><\/div>\n\n\n\n

    Processo de tratamento t\u00e9rmico<\/h2>\n\n\n\n

    Pr\u00e9-aquecimento<\/h3>\n\n\n\n

    Preheat to 649\u2013677\u00b0C (1200\u20131250\u00b0F) and hold until the workpiece is uniformly heated throughout. This reduces thermal shock and the risk of deformation or cracking when the steel enters the austenitizing furnace.<\/p>\n\n\n\n

    Austenitiza\u00e7\u00e3o<\/h3>\n\n\n\n

    Heat to 760\u2013800\u00b0C (1400\u20131472\u00b0F). At this temperature, alloy carbides dissolve and the microstructure transforms to austenite. 790\u00b0C (1450\u00b0F) is the recommended standard temperature for most applications. Control soak time carefully \u2014 excessive soaking raises retained austenite content and reduces final hardness.<\/p>\n\n\n\n

    Resfriamento<\/h3>\n\n\n\n

    Quench in oil, stopping when the workpiece reaches 66\u201393\u00b0C (150\u2013200\u00b0F). Maintain quenching oil temperature between 50\u201370\u00b0C (120\u2013160\u00b0F). Do not use water or brine \u2014 the risk of cracking is severe. Do not wrap in stainless foil, as it impedes oil contact.<\/p>\n\n\n\n

    \"Diagrama
    Diagrama de transforma\u00e7\u00e3o isot\u00e9rmica do a\u00e7o ferramenta O2<\/figcaption><\/figure>\n\n\n\n

    T\u00eampera<\/h3>\n\n\n\n

    Begin tempering immediately once the workpiece cools to 52\u201365\u00b0C (125\u2013150\u00b0F) \u2014 do not allow it to reach room temperature first. Temper at 150\u2013260\u00b0C (300\u2013500\u00b0F). Minimum soak time: 2 hours per inch (4.7 min\/mm) of cross-section, followed by air cooling.<\/p>\n\n\n\n

    For demanding applications, double tempering is preferred. For most tooling, a single temper at 175\u2013205\u00b0C (345\u2013400\u00b0F) achieves a working hardness of 58\u201362 HRC.<\/p>\n\n\n\n

    Hardness vs. tempering temperature:<\/strong><\/p>\n\n\n\n

    Temperatura de t\u00eampera \u00b0C (\u00b0F)<\/th>Dureza (HRC)<\/th><\/tr><\/thead>
    150 (300)<\/td>62.5<\/td><\/tr>
    205 (400)<\/td>59.5<\/td><\/tr>
    260 (500)<\/td>56.5<\/td><\/tr>
    315 (600)<\/td>54.0<\/td><\/tr>
    370 (700)<\/td>52.0<\/td><\/tr>
    425 (800)<\/td>49.5<\/td><\/tr>
    480 (900)<\/td>46.0<\/td><\/tr>
    540 (1000)<\/td>41.5<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    Common Issues and Solutions<\/h2>\n\n\n\n

    Deformation and Dimensional Changes<\/h3>\n\n\n\n

    Deformation in O2 steel is usually caused by excessive quench rates or uneven heating. Three controls:<\/p>\n\n\n\n