{"id":18309,"date":"2026-09-15T07:44:16","date_gmt":"2026-09-14T23:44:16","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=18309"},"modified":"2026-10-21T10:42:21","modified_gmt":"2026-10-21T02:42:21","slug":"tool-steel-size-change-in-heat-treatment","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/es\/tool-steel-size-change-in-heat-treatment\/","title":{"rendered":"Cambio dimensional del acero para herramientas en el tratamiento t\u00e9rmico"},"content":{"rendered":"<h1 class=\"wp-block-heading has-text-align-center\" id=\"h-tool-steel-size-change-in-heat-treatment\">Cambio dimensional del acero para herramientas en el tratamiento t\u00e9rmico<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">El acero templado sale del temple m\u00e1s grande de lo que entr\u00f3, y cu\u00e1nto se mueve depende de la familia de grado. Las cifras a continuaci\u00f3n muestran el crecimiento esperado para aceros para herramientas de temple en agua, en aceite y en aire, de modo que pueda dejar un troquel con suficiente sobreespesor para el corte de acabado despu\u00e9s del temple en lugar de desecharlo.<\/p>\n\n\n\n<h2 id=\"h-expected-growth-by-tool-steel-family\" class=\"wp-block-heading\">Crecimiento esperado por familia de acero para herramientas<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Crecimiento de una pieza totalmente templada por pulgada de dimensi\u00f3n. Las dos columnas de ejemplo a la derecha traducen la tasa a una longitud de 12 in. y de 300 mm, y se calculan a partir de la tasa en lugar de citarse. El crecimiento de un bloque particular tambi\u00e9n depende de su forma, por lo que la segunda mitad de esta p\u00e1gina importa tanto como la tabla.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Familia<\/th><th class=\"has-text-align-left\" data-align=\"left\">Grados t\u00edpicos<\/th><th class=\"has-text-align-left\" data-align=\"left\">Crecimiento esperado, in. por in.<\/th><th class=\"has-text-align-left\" data-align=\"left\">En una longitud de 12 in.<\/th><th class=\"has-text-align-left\" data-align=\"left\">En una longitud de 300 mm<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">Temple al agua<\/td><td class=\"has-text-align-left\" data-align=\"left\">W1, W2<\/td><td class=\"has-text-align-left\" data-align=\"left\">+0.002 a +0.004<\/td><td class=\"has-text-align-left\" data-align=\"left\">+0.024 a +0.048 pulg.<\/td><td class=\"has-text-align-left\" data-align=\"left\">+0.6 a +1.2 mm<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/aobosteel.com\/es\/oil-hardening-tool-steel\/\">Temple en aceite<\/a><\/td><td class=\"has-text-align-left\" data-align=\"left\">O1, O2, O6<\/td><td class=\"has-text-align-left\" data-align=\"left\">+0.0015<\/td><td class=\"has-text-align-left\" data-align=\"left\">+0.018 pulg.<\/td><td class=\"has-text-align-left\" data-align=\"left\">+0.45 mm<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">endurecimiento por aire<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2, A6, S7, H13<\/td><td class=\"has-text-align-left\" data-align=\"left\">+0.001<\/td><td class=\"has-text-align-left\" data-align=\"left\">+0.012 pulg.<\/td><td class=\"has-text-align-left\" data-align=\"left\">+0.30 mm<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/aobosteel.com\/es\/d2-tool-steel\/\">endurecimiento por aire<\/a><\/td><td class=\"has-text-align-left\" data-align=\"left\">D2<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u00b10.0005<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u00b10.006 in.<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u00b10.15 mm<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Fuente: Tool and Die Making Troubleshooter (R. M. Leed), Tabla 8-9, a partir de datos de distorsi\u00f3n de Bethlehem Steel Corporation. Las columnas de 12 in. y 300 mm se calculan a partir de la tasa de la tercera columna.<\/p>\n\n\n\n<h2 id=\"h-where-the-movement-comes-from\" class=\"wp-block-heading\">De d\u00f3nde proviene el movimiento<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Cada cambio de tama\u00f1o en el temple es un cambio de volumen en la estructura cristalina, y la tabla a continuaci\u00f3n muestra los tres pasos que lo componen. El cambio de volumen se cita seg\u00fan lo publicado, y la tercera columna es un tercio de este, que es el cambio en una sola dimensi\u00f3n.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Reacci\u00f3n<\/th><th class=\"has-text-align-left\" data-align=\"left\">Cambio de volumen, %<\/th><th class=\"has-text-align-left\" data-align=\"left\">Cambio dimensional, in. por in.<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">Esferoidita a austenita, durante el calentamiento<\/td><td class=\"has-text-align-left\" data-align=\"left\">-4.64 + 2.21 (%C)<\/td><td class=\"has-text-align-left\" data-align=\"left\">-0.0155 + 0.0074 (%C)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Austenita a martensita, durante el temple<\/td><td class=\"has-text-align-left\" data-align=\"left\">4.64 &#8211; 0.53 (%C)<\/td><td class=\"has-text-align-left\" data-align=\"left\">0.0155 &#8211; 0.0018 (%C)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Esferoidita a martensita, cambio neto despu\u00e9s del endurecimiento<\/td><td class=\"has-text-align-left\" data-align=\"left\">1.68 (%C)<\/td><td class=\"has-text-align-left\" data-align=\"left\">0.0056 (%C)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Fuente: ASM Handbook, Volumen 11, Failures Related to Heat Treating Operations, Tabla 2, cambios dimensionales durante el endurecimiento de aceros para herramientas al carbono. La columna dimensional es un tercio del cambio de volumen, la relaci\u00f3n de deformaci\u00f3n dada como Eq 2 en el mismo cap\u00edtulo.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>C es el carbono disuelto en la austenita, no el carbono del an\u00e1lisis. En un grado alto en cromo como el D2, gran parte del carbono reside en carburos de aleaci\u00f3n y nunca entra en soluci\u00f3n, por lo que el cambio neto para ese grado es mucho menor de lo que sugiere la f\u00f3rmula por s\u00ed sola. Use la f\u00f3rmula para ver la direcci\u00f3n de cada paso y la tabla de crecimiento anterior para la tolerancia.<\/li>\n\n\n\n<li>La esferoidita es la microestructura del acero para herramientas recocido tal como se entrega.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-reading-the-table\" class=\"wp-block-heading\">Leyendo la tabla<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">El crecimiento en al menos una dimensi\u00f3n es normal. Una pieza que no muestra ninguno se ha transformado por completo, y el volumen faltante aparecer\u00e1 m\u00e1s tarde, a menudo despu\u00e9s de una operaci\u00f3n de rectificado o en servicio. Los aceros que retienen mucha austenita son los que m\u00e1s se mueven, por lo que <a href=\"https:\/\/aobosteel.com\/es\/a8-tool-steel-heat-treatment\/\">grados de temple al aire<\/a> se revenen dos y tres veces.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La geometr\u00eda decide qu\u00e9 dimensiones se mueven. Una pieza rectangular larga y delgada que se templa de forma completa crece en ancho, espesor y longitud. Una pieza larga y gruesa que no se templa de forma completa crece en ancho y espesor y se contrae en longitud, que es lo que sorprende a un taller que mecaniza un bloque de troquel largo a la medida final antes del tratamiento t\u00e9rmico.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La ruta segura es dejar sobreespesor y mecanizar el acabado despu\u00e9s del temple. Cuando eso no es posible, un <a href=\"https:\/\/aobosteel.com\/es\/air-hardening-tool-steel\/\">grado de endurecimiento al aire<\/a> es lo m\u00e1s cercano a una garant\u00eda, ya que <a href=\"https:\/\/aobosteel.com\/es\/d5-and-d7-tool-steel-heat-treatment\/\">D2 y sus similares<\/a> se transforman lentamente y muestran el menor cambio dimensional de las cuatro familias. El material a eliminar de la barra tal como se suministra antes de comenzar el mecanizado se establece en la <a href=\"https:\/\/aobosteel.com\/es\/tool-steel-machining-allowance-chart\/\">Tabla de sobremedida de mecanizado<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cuatro pasos reducen el movimiento antes de que comience. El alivio de tensiones de la pieza despu\u00e9s del mecanizado en desbaste libera las tensiones dejadas por el corte, para que el temple no las perturbe primero. El precalentamiento en una o dos etapas mantiene peque\u00f1a la diferencia de temperatura entre secciones delgadas y gruesas. Cargar el horno de modo que la pieza pueda suspenderse verticalmente elimina el pandeo causado por su propio peso a temperatura. La permanencia completa a la temperatura de austenizaci\u00f3n uniformiza la transformaci\u00f3n en toda la secci\u00f3n, como el <a href=\"https:\/\/aobosteel.com\/es\/tool-steel-heat-treatment-troubleshooting-chart\/\">diagrama de soluci\u00f3n de problemas de tratamiento t\u00e9rmico<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cuando una dimensi\u00f3n debe mantenerse con tolerancia estricta, un tratamiento subcero o <a href=\"https:\/\/aobosteel.com\/es\/cryogenic-treatment-of-tool-steel\/\">criog\u00e9nico<\/a> completa la transformaci\u00f3n que el enfriamiento a temperatura ambiente deja incompleta, y la pieza deja de moverse despu\u00e9s. El orden importa. La pieza se templa, se revene una vez para aliviar tensiones, se mantiene por debajo de cero, se devuelve lentamente a temperatura ambiente y se revene de nuevo. Una congelaci\u00f3n profunda a menos 120 \u00b0F se mantiene durante 120 minutos por pulgada de espesor; el enfriamiento criog\u00e9nico controlado llega a aproximadamente menos 320 \u00b0F; y un re-revenido sigue a cada ciclo de congelaci\u00f3n profunda. Un ciclo como este es una decisi\u00f3n del tratador t\u00e9rmico y no del taller, y las etapas que debe incluir un ciclo de acero para herramientas se enumeran en el <a href=\"https:\/\/aobosteel.com\/es\/tool-steel-heat-treatment-guide\/\">gu\u00eda de tratamiento t\u00e9rmico<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mecanizar una herramienta a la medida final antes del temple ahorra tiempo de rectificado justo hasta el punto en que la pieza vuelve sobredimensionada, subdimensionada o fuera de planitud, y entonces cuesta un segundo tratamiento t\u00e9rmico y una reelaboraci\u00f3n. Para los troqueles que mantienen una tolerancia, el sobreespesor es el h\u00e1bito m\u00e1s econ\u00f3mico. El error m\u00e1s com\u00fan, y las comprobaciones que lo previenen, se exponen en el <a href=\"https:\/\/aobosteel.com\/es\/blog\/how-to-avoid-d2-heat-treatment-mistakes\/\">Errores en el tratamiento t\u00e9rmico D2<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El tama\u00f1o se mide en la pieza fr\u00eda y totalmente revenida, nunca directamente despu\u00e9s del temple. Una pieza que se lee sobredimensionada antes del revenido se mover\u00e1 de nuevo a trav\u00e9s de los ciclos de revenido y cualquier paso subcero posterior, as\u00ed que verifique las dimensiones al final de todo el ciclo y compruebe la dureza en la misma cara, usando <a href=\"https:\/\/aobosteel.com\/es\/hardness-testing-methods\/\">M\u00e9todos de ensayo de dureza<\/a> cuando una lima no es suficiente.<\/p>\n\n\n\n<h2 id=\"h-temper-twice-before-measuring\" class=\"wp-block-heading\">Revenir dos veces antes de medir<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Los grados de temple al aire se revenen dos o tres veces porque cada ciclo convierte m\u00e1s austenita retenida y mueve las dimensiones un poco m\u00e1s. Una pieza medida despu\u00e9s de un solo revenido no mantendr\u00e1 la medida que muestra. Las ventanas de revenido y la dureza que produce cada una est\u00e1n en el <a href=\"https:\/\/aobosteel.com\/es\/tool-steel-tempering-chart\/\">tabla de templado<\/a>.<\/p>\n\n\n\n<h2 id=\"h-air-hardening-wins-on-stability\" class=\"wp-block-heading\">El temple al aire gana en estabilidad<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La diferencia entre m\u00e1s o menos 0.0005 in. por in. para el D2 y 0.0015 in. por in. para un grado de temple al aceite es la diferencia entre una pasada de acabado y un bloque desechado. Donde una matriz se rectifica despu\u00e9s del endurecimiento, incline la elecci\u00f3n hacia los <a href=\"https:\/\/aobosteel.com\/es\/cold-work-tool-steels\/\">grados de trabajo en fr\u00edo<\/a> que se transforman al aire.<\/p>\n\n\n\n<h2 id=\"h-d2-is-the-reference-case\" class=\"wp-block-heading\">El D2 es el caso de referencia<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">D2 es el grado que m\u00e1s a menudo se mecaniza cerca de la medida antes del temple, y el que tiene el menor margen de error cuando el taller supone que no hay movimiento. El <a href=\"https:\/\/aobosteel.com\/es\/d2-tool-steel-heat-treatment-guide\/\">Gu\u00eda de tratamiento t\u00e9rmico D2<\/a> incluye la secuencia de temple, incluidos el precalentamiento y los ciclos de revenido que estabilizan el tama\u00f1o.<\/p>\n\n\n\n<h2 id=\"h-keep-the-heat-treat-record\" class=\"wp-block-heading\">Conserve el registro del tratamiento t\u00e9rmico<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Las cifras de crecimiento anteriores promedian una familia de grado, y la pieza que tiene delante es una colada de acero con un registro de tratamiento t\u00e9rmico. Anote lo que hizo el horno y conserve el certificado de colada junto con ella para que la pr\u00f3xima pieza del mismo grado se prevea a partir de datos en lugar de memoria.<\/p>\n\n\n\n<h3 id=\"h-related-reference-pages\" class=\"wp-block-heading\">P\u00e1ginas de referencia relacionadas<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/aobosteel.com\/es\/tool-steel-hardenability-chart\/\">Tabla de templabilidad del acero para herramientas<\/a> \u00b7 <a href=\"https:\/\/aobosteel.com\/es\/tool-steel-annealing-normalizing-temperature-chart\/\">Tabla de recocido y normalizado del acero para herramientas<\/a> \u00b7 <a href=\"https:\/\/aobosteel.com\/es\/quench-cracking-tool-steel\/\">agrietamiento por temple en acero para herramientas<\/a> \u00b7 <a href=\"https:\/\/aobosteel.com\/es\/tool-steel-forging-temperature-guide\/\">gu\u00eda de temperaturas de forja del acero para herramientas<\/a> \u00b7 <a href=\"https:\/\/aobosteel.com\/es\/blog\/tool-steel-delivery-conditions\/\">Condiciones de suministro del acero para herramientas<\/a> \u00b7 <a href=\"https:\/\/aobosteel.com\/es\/d2-tool-steel-machining-guide\/\">Gu\u00eda de mecanizado de acero para herramientas D2<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Fuentes: Tool and Die Making Troubleshooter (R. M. Leed, Hanser Gardner), Tabla 8-9 y las secciones sobre distorsi\u00f3n y tratamiento subcero, basadas en datos de distorsi\u00f3n de Bethlehem Steel; ASM Handbook, Volumen 11, Failures Related to Heat Treating Operations, Tabla 2. Datos de referencia solo para comparaci\u00f3n. El movimiento real depende del dise\u00f1o de la pieza, la masa, la geometr\u00eda, el grado y la pr\u00e1ctica de temple. Confirme la tolerancia con su proveedor de tratamiento t\u00e9rmico antes de mecanizar la pieza a medida.<\/p>","protected":false},"excerpt":{"rendered":"<p>Tool Steel Size Change in Heat Treatment Hardened steel comes out of the quench larger than it went in, and how much it moves depends on the grade family. The figures below show expected growth for water-, oil-, and air-hardening tool steels, so you can leave a die with enough stock for the finish cut [&hellip;]<\/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":"set","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 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Steel Size Change in Heat Treatment Hardened steel comes out of the quench larger than it went in, and how much it moves depends on the grade family. 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