{"id":16029,"date":"2026-06-23T12:40:22","date_gmt":"2026-06-23T04:40:22","guid":{"rendered":"https:\/\/aobosteel.com\/?p=16029"},"modified":"2026-06-23T12:40:23","modified_gmt":"2026-06-23T04:40:23","slug":"case-hardening-steel-guide","status":"publish","type":"post","link":"https:\/\/aobosteel.com\/es\/blog\/case-hardening-steel-guide\/","title":{"rendered":"Gu\u00eda para el endurecimiento superficial del acero: Proceso y usos"},"content":{"rendered":"<h1 id=\"h-case-hardening-steel-process-grades-and-when-to-use-it\" class=\"wp-block-heading has-large-font-size\">Acero cementado: proceso, grados y cu\u00e1ndo usarlo<\/h1>\n\n\n\n<h2 id=\"h-what-is-case-hardening\" class=\"wp-block-heading\">\u00bfQu\u00e9 es el endurecimiento superficial?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">El endurecimiento superficial es un conjunto de tratamientos que producen una capa externa dura y resistente al desgaste (la \u201ccapa\u201d) sobre un n\u00facleo tenaz y d\u00factil. El m\u00e9todo m\u00e1s com\u00fan es la carburaci\u00f3n, que introduce carbono por difusi\u00f3n en la superficie del acero con bajo contenido de carbono. Los m\u00e9todos de difusi\u00f3n relacionados son la carbonitruraci\u00f3n (carbono y nitr\u00f3geno) y la nitruraci\u00f3n (solo nitr\u00f3geno). Todos ellos endurecen la superficie modificando su composici\u00f3n qu\u00edmica, para luego templar la pieza donde el proceso lo requiera.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El endurecimiento superficial no debe confundirse con el endurecimiento por inducci\u00f3n o por llama. Estos \u00faltimos tambi\u00e9n endurecen una capa superficial, pero lo hacen calentando y enfriando localmente acero que ya contiene suficiente carbono, sin a\u00f1adir ning\u00fan elemento nuevo. Esta gu\u00eda trata sobre los procesos de endurecimiento superficial por difusi\u00f3n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Una pieza cementada est\u00e1 dise\u00f1ada para ofrecer dos propiedades a la vez:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Una superficie dura y resistente al desgaste, t\u00edpicamente de 58 a 64 HRC.<\/li>\n\n\n\n<li>Un n\u00facleo resistente y a prueba de golpes, t\u00edpicamente de 30 a 45 HRC.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Un acero endurecido en toda su extensi\u00f3n a 60 HRC ser\u00eda demasiado fr\u00e1gil para una pieza sometida a cargas de impacto, mientras que un n\u00facleo con una dureza de 35 HRC se desgastar\u00eda r\u00e1pidamente si quedara expuesto en la superficie. El endurecimiento superficial separa estos dos requisitos en dos zonas distintas de la misma pieza.<\/p>\n\n\n\n<h2 id=\"h-how-case-hardening-works\" class=\"wp-block-heading\">C\u00f3mo funciona el endurecimiento superficial<\/h2>\n\n\n\n<h3 id=\"h-carburizing-most-common\" class=\"wp-block-heading\">Carburizaci\u00f3n (la m\u00e1s com\u00fan)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La carburaci\u00f3n a\u00f1ade carbono a la superficie del acero con bajo contenido de carbono (normalmente de 0,10 a 0,25% de carbono), que no es lo suficientemente alto como para endurecerse por s\u00ed solo.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Difusi\u00f3n de carbono: la pieza se mantiene a 900-950 \u00b0C en una atm\u00f3sfera rica en carbono (gas, sal l\u00edquida o compuesto s\u00f3lido). El carbono se disuelve en la austenita de la superficie y se difunde hacia el interior.<\/li>\n\n\n\n<li>Profundidad de la capa: la profundidad efectiva t\u00edpica oscila entre 0,5 y 2,0 mm. El crecimiento sigue la ra\u00edz cuadrada del tiempo, en lugar de una tasa constante, por lo que una capa m\u00e1s profunda requiere un tiempo desproporcionadamente mayor. Aproximadamente, duplicar la profundidad de la capa requiere aproximadamente cuatro veces el tiempo de carburizaci\u00f3n a una temperatura determinada.<\/li>\n\n\n\n<li>Temple: la pieza se templa en aceite o agua. La superficie con alto contenido de carbono se transforma en martensita dura a 60-64 HRC, mientras que el n\u00facleo con bajo contenido de carbono permanece m\u00e1s blando y resistente.<\/li>\n\n\n\n<li>Revenido: un revenido a baja temperatura, entre 150 y 200 \u00b0C, alivia las tensiones con poca p\u00e9rdida de dureza superficial.<\/li>\n<\/ol>\n\n\n\n<h3 id=\"h-carbonitriding\" class=\"wp-block-heading\">Carbonitruraci\u00f3n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La carbonitruraci\u00f3n consiste esencialmente en la carburaci\u00f3n con nitr\u00f3geno a\u00f1adido a la atm\u00f3sfera. El nitr\u00f3geno aumenta la templabilidad de la capa y reduce la temperatura de endurecimiento, lo que permite que la pieza funcione a temperaturas de entre 800 y 870 \u00b0C y se enfr\u00ede en aceite. La profundidad de la capa es menor que en la carburaci\u00f3n, generalmente de 0,1 a 0,5 mm, y el ciclo es m\u00e1s r\u00e1pido. Es adecuada para piezas peque\u00f1as y componentes de desgaste de alto volumen.<\/p>\n\n\n\n<h3 id=\"h-nitriding\" class=\"wp-block-heading\">Nitruraci\u00f3n<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">La nitruraci\u00f3n consiste en la difusi\u00f3n de nitr\u00f3geno en la superficie a baja temperatura, entre 500 y 550 \u00b0C, en gas amon\u00edaco o en un ba\u00f1o de sales. No se requiere enfriamiento r\u00e1pido, ya que la dureza proviene de los nitruros duros que se forman in situ. La capa superficial es delgada, de aproximadamente 0,1 a 0,5 mm, pero extremadamente dura, entre 700 y 1100 HV, y la distorsi\u00f3n es m\u00ednima debido a la ausencia de enfriamiento r\u00e1pido y de cambios de fase en el n\u00facleo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La nitruraci\u00f3n no se utiliza en los grados de carburaci\u00f3n simples de bajo carbono. Se necesitan aceros que contengan elementos formadores de nitruro como cromo, molibdeno, aluminio o vanadio. En la pr\u00e1ctica, eso significa aceros aleados de carbono medio (por ejemplo, <a href=\"https:\/\/aobosteel.com\/es\/blog\/4140-steel-properties\/\">4140<\/a> y aceros espec\u00edficos para nitruraci\u00f3n) y muchos aceros para herramientas. <a href=\"https:\/\/aobosteel.com\/es\/h13-tool-steel\/\">H13<\/a>, Por ejemplo, se nitrura de forma rutinaria para mejorar la resistencia al desgaste y la erosi\u00f3n de la superficie en las herramientas de fundici\u00f3n a presi\u00f3n y extrusi\u00f3n.<\/p>\n\n\n\n<h2 id=\"h-steels-suitable-for-case-hardening\" class=\"wp-block-heading\">Aceros aptos para cementaci\u00f3n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">La carburaci\u00f3n y la carbonitruraci\u00f3n requieren un acero base con bajo contenido de carbono. Las adiciones de aleaci\u00f3n en los grados superiores aumentan la resistencia del n\u00facleo y la capacidad de endurecimiento superficial para secciones m\u00e1s gruesas.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Grado (AISI\/GB)<\/th><th>Carbono<\/th><th>Aleaci\u00f3n clave<\/th><th>Uso t\u00edpico<\/th><\/tr><\/thead><tbody><tr><td>1018<\/td><td>~0.18%<\/td><td>Mn<\/td><td>Piezas de desgaste de baja tensi\u00f3n, menor coste<\/td><\/tr><tr><td>1020<\/td><td>~0.20%<\/td><td>Mn<\/td><td>Uso general<\/td><\/tr><tr><td>8620<\/td><td>~0.20%<\/td><td>Ni-Cr-Mo<\/td><td>Engranajes, ejes, pasadores, \u00e1rboles de levas<\/td><\/tr><tr><td>4320<\/td><td>~0.20%<\/td><td>Ni-Cr-Mo<\/td><td>Engranajes de alta resistencia<\/td><\/tr><tr><td>9310<\/td><td>~0.10%<\/td><td>Ni-Cr-Mo<\/td><td>Engranajes de aeronaves, alta fiabilidad<\/td><\/tr><tr><td>20CrMnTi<\/td><td>~0.20%<\/td><td>Cr-Mn-Ti<\/td><td>Engranajes de transmisi\u00f3n automotriz (comunes en China)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">La aleaci\u00f3n 8620 es la m\u00e1s utilizada para la carburaci\u00f3n, ya que equilibra la tenacidad del n\u00facleo con una templabilidad moderada. La aleaci\u00f3n 20CrMnTi incorpora titanio para refinar el grano y predomina en la producci\u00f3n de engranajes para autom\u00f3viles en China. Las aleaciones de carbono simple 1018 y 1020 son las opciones m\u00e1s econ\u00f3micas, pero ofrecen una resistencia y templabilidad limitadas, por lo que son m\u00e1s adecuadas para aplicaciones de menor exigencia.<\/p>\n\n\n\n<h2 id=\"h-case-hardening-vs-through-hardening\" class=\"wp-block-heading\">Endurecimiento superficial frente a endurecimiento total<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Aspecto<\/th><th>endurecimiento superficial<\/th><th>Mediante el endurecimiento<\/th><\/tr><\/thead><tbody><tr><td>Acero base al carbono<\/td><td>0,10 a 0,25%<\/td><td>~0,30% y superior<\/td><\/tr><tr><td>dureza superficial<\/td><td>58 a 64 HRC<\/td><td>58 a 64 HRC (acero para herramientas)<\/td><\/tr><tr><td>dureza del n\u00facleo<\/td><td>25 a 45 HRC<\/td><td>Igual que la superficie<\/td><\/tr><tr><td>Resistencia central<\/td><td>Alta<\/td><td>Bajo a alta dureza<\/td><\/tr><tr><td>Resistencia al desgaste<\/td><td>Solo superficie<\/td><td>Secci\u00f3n transversal completa<\/td><\/tr><tr><td>Despu\u00e9s del desgaste<\/td><td>N\u00facleo blando expuesto, falla r\u00e1pido<\/td><td>Se viste de forma uniforme<\/td><\/tr><tr><td>Resistencia a la fatiga<\/td><td>Excelente, por tensi\u00f3n superficial de compresi\u00f3n<\/td><td>Bien<\/td><\/tr><tr><td>Cambio dimensional<\/td><td>Algunos, por apagar<\/td><td>Var\u00eda, los grados de endurecimiento al aire se deforman menos.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">La tensi\u00f3n residual de compresi\u00f3n que queda en una capa carburizada supone una ventaja real para las piezas sometidas a flexi\u00f3n o contacto rodante, ya que suprime la iniciaci\u00f3n de grietas por fatiga en la superficie.<\/p>\n\n\n\n<h2 id=\"h-choosing-between-case-hardening-and-tool-steel\" class=\"wp-block-heading\">C\u00f3mo elegir entre acero cementado y acero para herramientas<\/h2>\n\n\n\n<h3 id=\"h-case-hardening-is-the-right-choice-when\" class=\"wp-block-heading\">El endurecimiento superficial es la opci\u00f3n correcta cuando<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Entre las piezas que necesitan un n\u00facleo resistente para soportar impactos o flexiones se incluyen engranajes, ejes y \u00e1rboles de levas.<\/li>\n\n\n\n<li>El desgaste se limita a la superficie y la pieza puede tolerar una profundidad de desgaste limitada.<\/li>\n\n\n\n<li>La forma es compleja, ya que la carburaci\u00f3n sigue superficies contorneadas y da como resultado una capa uniforme.<\/li>\n\n\n\n<li>La vida \u00fatil frente a la fatiga por flexi\u00f3n o contacto es fundamental, y la tensi\u00f3n superficial de compresi\u00f3n proporciona un beneficio directo.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-through-hardened-tool-steel-is-the-right-choice-when\" class=\"wp-block-heading\">El acero para herramientas templado en toda su masa es la elecci\u00f3n correcta cuando<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>La pieza es una herramienta de corte que se reafilar\u00e1, por lo que el filo debe tener propiedades uniformes en toda su profundidad.<\/li>\n\n\n\n<li>El desgaste puede penetrar m\u00e1s all\u00e1 de una capa delgada, como ocurre en procesos de troquelado, cizallado y extrusi\u00f3n de alta resistencia.<\/li>\n\n\n\n<li>Se requiere una alta dureza en caliente, por ejemplo, H13 en la fundici\u00f3n a presi\u00f3n.<\/li>\n\n\n\n<li>Toda la secci\u00f3n transversal debe resistir la deformaci\u00f3n pl\u00e1stica, como ocurre en los punzones y las matrices de conformado.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-why-case-hardening-cannot-replace-tool-steel-in-dies-and-cutting-tools\" class=\"wp-block-heading\">Por qu\u00e9 el endurecimiento superficial no puede reemplazar al acero para herramientas en matrices y herramientas de corte.<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Una capa superficial es poco profunda, t\u00edpicamente de 0,5 a 2 mm. Una vez que se desgasta, el n\u00facleo blando queda expuesto y la pieza falla r\u00e1pidamente. Los troqueles tambi\u00e9n se rectifican varias veces durante su vida \u00fatil, y cada rectificado elimina material endurecido, por lo que un troquel cementado eventualmente expondr\u00eda su n\u00facleo blando. Adem\u00e1s, la resistencia al desgaste de una capa cementada proviene \u00fanicamente de la martensita de alto contenido de carbono, mientras que un grado como el D2 contiene una alta fracci\u00f3n volum\u00e9trica de carburos de cromo duros, aproximadamente de 12 a 18% en volumen, que resisten la abrasi\u00f3n mucho mejor. Para un filo de corte, la retenci\u00f3n del filo del acero para herramientas templado en toda su masa es de una clase diferente.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">El endurecimiento superficial es excelente para engranajes, ejes y cojinetes. Sin embargo, no es la opci\u00f3n adecuada para matrices de troquelado, punzones, herramientas de conformado ni herramientas de corte, que requieren acero para herramientas templado en toda su masa.<\/p>\n\n\n\n<h2 id=\"h-quality-control-for-case-hardened-parts\" class=\"wp-block-heading\">Control de calidad para piezas cementadas<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Profundidad de la capa endurecida: medida mediante un an\u00e1lisis de dureza desde la superficie hasta el n\u00facleo, o mediante examen microsc\u00f3pico, en comparaci\u00f3n con la profundidad efectiva de la capa endurecida especificada.<\/li>\n\n\n\n<li>Dureza superficial: Rockwell C o Vickers con una carga espec\u00edfica.<\/li>\n\n\n\n<li>Dureza del n\u00facleo: generalmente se mide en el radio medio o en el centro.<\/li>\n\n\n\n<li>Microestructura: martensita fina en el caso de la muestra, sin carburos continuos en los l\u00edmites de grano y con austenita retenida controlada.<\/li>\n\n\n\n<li>Distorsi\u00f3n: comprobaci\u00f3n dimensional tras el tratamiento t\u00e9rmico.<\/li>\n<\/ul>\n\n\n\n<h2 id=\"h-related-pages\" class=\"wp-block-heading\">P\u00e1ginas relacionadas<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/aobosteel.com\/es\/que-es-el-acero-para-herramientas\/\">\u00bfQu\u00e9 es el acero para herramientas?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/es\/tool-steel-heat-treatment-guide\/\">Gu\u00eda de tratamiento t\u00e9rmico del acero para herramientas<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/es\/s7-tool-steel\/\">Acero para herramientas resistente a los golpes S7<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/es\/h13-tool-steel\/\">Acero para herramientas H13<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/es\/how-to-select-tool-steels\/\">Gu\u00eda de selecci\u00f3n de grados de acero para herramientas<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Case Hardening Steel: Process, Grades, and When to Use It What Is Case Hardening? Case hardening is a group of surface treatments that produce a hard, wear-resistant outer layer (the &#8220;case&#8221;) over a tough, ductile core. The most common method is carburizing, which diffuses carbon into the surface of low-carbon steel. The related diffusion methods [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":16030,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","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":"disabled","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 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":""},"categories":[22],"tags":[],"class_list":["post-16029","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.2 (Yoast SEO v28.2) - 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