{"id":19885,"date":"2026-09-27T00:11:15","date_gmt":"2026-09-26T16:11:15","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=19885"},"modified":"2026-10-16T00:04:22","modified_gmt":"2026-10-15T16:04:22","slug":"m7-tool-steel-heat-treatment","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/es\/m7-tool-steel-heat-treatment\/","title":{"rendered":"Tratamiento t\u00e9rmico del acero para herramientas M7"},"content":{"rendered":"

Tratamiento t\u00e9rmico del acero para herramientas M7<\/h1>\n\n\n\n

La composici\u00f3n qu\u00edmica, el ciclo de temple y la l\u00ednea de revenido que la ficha de origen indica para el acero r\u00e1pido al molibdeno M7. Un resumen de referencia de la pr\u00e1ctica publicada y no una especificaci\u00f3n de Aobo Steel.<\/p>\n\n\n\n

M7 en el grupo de los aceros r\u00e1pidos<\/h2>\n\n\n\n

El M7 es un acero r\u00e1pido al molibdeno con tungsteno y sin cobalto. La ficha indica 8,75% de molibdeno frente a 1,75% de tungsteno, por lo que la respuesta al temple se apoya en el molibdeno, y al no haber cifra de cobalto para el grado es la opci\u00f3n sin cobalto junto a los grados con cobalto de la misma familia. Un an\u00e1lisis sin cobalto de este tipo es m\u00e1s f\u00e1cil de rectificar y de mecanizar que un grado con cobalto y cede dureza a las temperaturas de corte m\u00e1s altas, que es el intercambio que hace un taller cuando la operaci\u00f3n trabaja a velocidad moderada en lugar de al tope del rango.<\/p>\n\n\n\n

La ficha es informaci\u00f3n de referencia para el taller y no una especificaci\u00f3n. Indica un paso de precalentamiento, una temperatura de temple y un medio de enfriamiento, luego una tabla de revenido con una sola cifra de dureza en cada fila y sin banda de tolerancia en ninguna parte. Conviene probar una primera herramienta cortada de una colada nueva de acero antes de que el ciclo se aplique a una herramienta de producci\u00f3n.<\/p>\n\n\n\n

Composici\u00f3n qu\u00edmica del M7<\/h2>\n\n\n\n

Elementos que la ficha de referencia enumera, porcentaje<\/h3>\n\n\n\n
Elemento<\/th>Porcentaje<\/th><\/tr><\/thead>
Carbono<\/td>1.00<\/td><\/tr>
Manganese<\/td>0.30<\/td><\/tr>
Silicon<\/td>0.40<\/td><\/tr>
Cromo<\/td>3.75<\/td><\/tr>
Molibdeno<\/td>8.75<\/td><\/tr>
Vanadio<\/td>2.00<\/td><\/tr>
Tungsteno<\/td>1.75<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fuente, informaci\u00f3n de referencia de tratamiento t\u00e9rmico para M7, p\u00e1gina impresa 192.<\/em><\/p>\n\n\n\n

La ficha indica una cifra por elemento en lugar de un rango de especificaci\u00f3n. El cobalto y el azufre figuran en la ficha sin cifra, por lo que esas filas se omiten de la tabla en vez de mostrarse como cero.<\/em><\/p>\n\n\n\n

El molibdeno al 8,75% y el tungsteno al 1,75% sostienen la respuesta al temple del grado. El cromo al 3,75% y el vanadio al 2,00% forman los carburos contra los que se desgasta el filo, y el carbono al 1,00% es de lo que est\u00e1n hechos esos carburos. La cifra de vanadio es alta para un grado al molibdeno, y se manifiesta como resistencia al desgaste en el filo y como costo de rectificado detr\u00e1s de \u00e9l. La ficha lista el cobalto y el azufre sin cifra, por lo que esas filas se omiten de la tabla. Los datos de composici\u00f3n de la tabla son solo de referencia general, los valores reales var\u00edan seg\u00fan la norma, la acer\u00eda y el n\u00famero de colada, as\u00ed que confirme las cifras contra el certificado de ensayo del material de la colada o consulte a Aobo Steel.<\/p>\n\n\n\n

Temple del M7<\/h2>\n\n\n\n

Precalentamiento, temperatura de temple y enfriamiento<\/h3>\n\n\n\n
Paso<\/th>M7<\/th><\/tr><\/thead>
Precalentamiento<\/td>1500 \u00b0F (815 \u00b0C)<\/td><\/tr>
Templar<\/td>2200 \u00b0F (1205 \u00b0C)<\/td><\/tr>
Medio de temple<\/td>Temple en aceite o en sal<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fuente, informaci\u00f3n de referencia de tratamiento t\u00e9rmico para M7, p\u00e1gina impresa 192.<\/em><\/p>\n\n\n\n

La ficha indica un precalentamiento, una temperatura de temple y un medio de enfriamiento para el grado. Esta ficha no lleva asterisco en el precalentamiento, a diferencia de las fichas O1 y O6 que la acompa\u00f1an, por lo que 1500 \u00b0F se indica para la carga tal como est\u00e1 escrita y no como un paso condicionado al tama\u00f1o de la secci\u00f3n.<\/em><\/p>\n\n\n\n

El precalentamiento de 1500 \u00b0F (815 \u00b0C) eleva la carga antes de la temperatura de austenizaci\u00f3n, y la ficha no indica condici\u00f3n alguna, por lo que el paso rige para toda carga y no solo para secciones gruesas. El temple se realiza a 2200 \u00b0F (1205 \u00b0C), que queda dentro de la banda de 2150 \u00b0F a 2225 \u00b0F que nuestra tabla de temple y revenido da para los grados al molibdeno, seguido de un enfriamiento en aceite o en sal. La sal es el m\u00e1s r\u00e1pido de los dos medios y al que recurre un taller en una herramienta con secci\u00f3n suficiente para necesitarlo, mientras que el aceite limita la distorsi\u00f3n en piezas esbeltas. La ficha indica una sola temperatura de temple, por lo que un taller que trabaje con una ventana de austenizaci\u00f3n distinta opera fuera de lo que da la ficha.<\/p>\n\n\n\n

Respuesta al revenido del M7<\/h2>\n\n\n\n

Dureza que deja cada temperatura de revenido<\/h3>\n\n\n\n
Revenido, \u00b0F<\/th>\u00b0C<\/th>M7, HRC<\/th><\/tr><\/thead>
Reci\u00e9n templado<\/td>Sin revenido<\/td>66<\/td><\/tr>
900<\/td>480<\/td>65<\/td><\/tr>
950<\/td>510<\/td>66<\/td><\/tr>
1000<\/td>540<\/td>66<\/td><\/tr>
1050<\/td>565<\/td>65<\/td><\/tr>
1100<\/td>595<\/td>64<\/td><\/tr>
1150<\/td>620<\/td>58<\/td><\/tr>
1200<\/td>650<\/td>54<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fuente, informaci\u00f3n de referencia de tratamiento t\u00e9rmico para M7, p\u00e1gina impresa 192.<\/em><\/p>\n\n\n\n

La ficha escalona las temperaturas de revenido de 50 \u00b0F en 50 \u00b0F desde 900 \u00b0F hasta 1200 \u00b0F e indica una cifra Rockwell C en cada fila. La primera fila es la dureza tal como se templa, antes de cualquier revenido. Las cifras se mantienen dentro de un punto del valor tal como se templa hasta 1050 \u00b0F y caen despu\u00e9s de eso, y la ficha termina en 1200 \u00b0F.<\/em><\/p>\n\n\n\n

Tal como se templa el grado se sit\u00faa en 66 HRC, y la ficha lo mantiene dentro de un punto desde ah\u00ed hasta 1050 \u00b0F (565 \u00b0C) antes de que la l\u00ednea se quiebre. Los escalones posteriores indican 64 HRC a 1100 \u00b0F (595 \u00b0C), 58 HRC a 1150 \u00b0F (620 \u00b0C) y 54 HRC a 1200 \u00b0F (650 \u00b0C). Una meseta tan plana deja margen para elegir la temperatura de revenido por tenacidad, y cualquier p\u00e9rdida real de dureza de trabajo comienza por encima de 1050 \u00b0F. La ficha indica una cifra en cada fila y no dice nada sobre el n\u00famero de ciclos de revenido, as\u00ed que trate la l\u00ednea como la respuesta del grado y acuerde los ciclos con su tratador t\u00e9rmico antes de que la herramienta entre en servicio.<\/p>\n\n\n\n

\n

Tratamiento t\u00e9rmico del acero para herramientas M7, PDF imprimible<\/strong><\/p>\n\n

La composici\u00f3n qu\u00edmica, el ciclo de temple y la respuesta al revenido del M7 de esta p\u00e1gina en un solo PDF, con nuestros datos de contacto.<\/p>\n\n

\n
Descargar PDF, 374 KB<\/a><\/div>\n\n<\/div>\n<\/div>\n\n\n\n

Datos de referencia relacionados<\/h2>\n\n\n\n

El grupo al que pertenece este grado figura en el cat\u00e1logo de aceros r\u00e1pidos<\/a>, y la forma en que se eligen los grados para trabajo de corte se expone en la p\u00e1gina de selecci\u00f3n de acero para herramientas de corte r\u00e1pido<\/a>. Las herramientas para las que se compran los grados al molibdeno est\u00e1n en la p\u00e1gina de acero r\u00e1pido para herramientas de corte<\/a>, y los grados con cobalto junto al M7 est\u00e1n en la p\u00e1gina del acero para herramientas M35<\/a> y la p\u00e1gina del acero para herramientas M42<\/a>. Solo las bandas de revenido est\u00e1n en la Tabla de revenido del acero para herramientas<\/a>, las bandas de temple y revenido de todos los grupos est\u00e1n en la tabla de temple y revenido del acero para herramientas<\/a>, y los rangos de composici\u00f3n de la serie M est\u00e1n en la Tabla de composici\u00f3n del acero para herramientas<\/a>.<\/p>\n\n\n\n

Datos de referencia recopilados de Heat Treatment, Selection, and Application of Tool Steels (William E. Bryson, segunda edici\u00f3n, Hanser). La composici\u00f3n qu\u00edmica, el ciclo de temple y la respuesta al revenido del M7 provienen de la informaci\u00f3n de referencia de tratamiento t\u00e9rmico de la p\u00e1gina impresa 192.<\/p>","protected":false},"excerpt":{"rendered":"

M7 Tool Steel Heat Treatment The chemistry, the hardening cycle and the tempering line the source card prints for molybdenum high speed steel M7. A reference summary of published practice and not an Aobo Steel specification. M7 in the high speed steel group M7 is a molybdenum high speed steel with tungsten and without cobalt. […]<\/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 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