{"id":12376,"date":"2026-01-23T10:28:19","date_gmt":"2026-01-23T02:28:19","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=12376"},"modified":"2026-03-31T15:55:08","modified_gmt":"2026-03-31T07:55:08","slug":"selection-of-tool-steel-for-die-casting-cores-and-inserts","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/selection-of-tool-steel-for-die-casting-cores-and-inserts\/","title":{"rendered":"Guia de sele\u00e7\u00e3o de a\u00e7os para fundi\u00e7\u00e3o sob press\u00e3o para n\u00facleos e insertos | Fornecimento a granel"},"content":{"rendered":"<div class=\"wp-block-uagb-container uagb-block-185f9477 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<h1 class=\"wp-block-heading\" id=\"h-selection-of-tool-steel-for-die-casting-cores-and-inserts\">Sele\u00e7\u00e3o de a\u00e7o ferramenta para n\u00facleos e insertos de fundi\u00e7\u00e3o sob press\u00e3o<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Os n\u00facleos e insertos s\u00e3o normalmente os primeiros componentes a falhar nas ferramentas de fundi\u00e7\u00e3o sob press\u00e3o. Sua vida \u00fatil determina diretamente a frequ\u00eancia de manuten\u00e7\u00e3o, o custo das ferramentas e o tempo de inatividade da produ\u00e7\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Durante a opera\u00e7\u00e3o, o metal fundido entra na cavidade sob press\u00f5es de 20 a 150 MPa, podendo chegar a 700 MPa em casos extremos. Simultaneamente, os insertos s\u00e3o submetidos a um r\u00e1pido aquecimento superficial seguido de resfriamento for\u00e7ado. Isso cria gradientes t\u00e9rmicos acentuados entre a superf\u00edcie e o n\u00facleo, resultando em expans\u00e3o e contra\u00e7\u00e3o repetidas em cada ciclo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nessas condi\u00e7\u00f5es, a falha \u00e9 causada por mecanismos identific\u00e1veis, e n\u00e3o por danos aleat\u00f3rios. Em produ\u00e7\u00e3o, os insertos normalmente falham de uma das seguintes maneiras:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Perda de material superficial causada pelo fluxo de fus\u00e3o em alta velocidade (lavagem).<\/li>\n\n\n\n<li>Ades\u00e3o entre a liga fundida e a superf\u00edcie da ferramenta (soldagem)<\/li>\n\n\n\n<li>Redes de fissuras superficiais resultantes de tens\u00e3o t\u00e9rmica c\u00edclica (fissura\u00e7\u00e3o por calor).<\/li>\n\n\n\n<li>Fratura s\u00fabita devido \u00e0 concentra\u00e7\u00e3o de tens\u00e3o ou choque t\u00e9rmico.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A sele\u00e7\u00e3o do a\u00e7o ferramenta deve, portanto, basear-se no modo de falha predominante em seu processo, e n\u00e3o nas propriedades gerais do material.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">L\u00f3gica de Sele\u00e7\u00e3o Principal<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Para n\u00facleos e insertos fundidos sob press\u00e3o, a sele\u00e7\u00e3o do material \u00e9 determinada pelo fato de a falha ser dominada por amolecimento t\u00e9rmico ou por fissura\u00e7\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Se o material perde resist\u00eancia com o aumento da temperatura, a eros\u00e3o e a deforma\u00e7\u00e3o se aceleram.<br>Se o material n\u00e3o for resistente, ocorrer\u00e3o fissuras antes que o desgaste se torne relevante.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A classifica\u00e7\u00e3o correta \u00e9 escolhida identificando-se o principal mecanismo de falha.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Fadiga t\u00e9rmica (fissura\u00e7\u00e3o por calor)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Quando os insertos falham devido a fissuras superficiais, a causa principal \u00e9 a tens\u00e3o t\u00e9rmica c\u00edclica. A superf\u00edcie se expande sob o calor enquanto o interior a restringe, criando tens\u00f5es repetidas de tra\u00e7\u00e3o e compress\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Materiais com microestrutura est\u00e1vel em temperaturas elevadas retardam o in\u00edcio de trincas e reduzem a taxa de propaga\u00e7\u00e3o de trincas.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Resist\u00eancia ao calor e ao amolecimento<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Se os insertos apresentarem deforma\u00e7\u00e3o pl\u00e1stica ou desgaste superficial r\u00e1pido, o fator limitante \u00e9 a resist\u00eancia a altas temperaturas. O material deve manter a dureza sob a temperatura de opera\u00e7\u00e3o para resistir \u00e0 eros\u00e3o e manter a estabilidade dimensional.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Isso se torna crucial em condi\u00e7\u00f5es de fundi\u00e7\u00e3o de alta velocidade ou alta temperatura.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Resist\u00eancia \u00e0 fratura (tenacidade)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Quando a falha se manifesta como fissuras repentinas, especialmente em se\u00e7\u00f5es finas ou geometrias agudas, a tenacidade torna-se o fator determinante.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nesse caso, aumentar a dureza geralmente acelera a falha em vez de resolv\u00ea-la. A sele\u00e7\u00e3o de materiais deve priorizar classes com maior resist\u00eancia \u00e0 fratura.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Resist\u00eancia \u00e0 soldagem<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Na fundi\u00e7\u00e3o de alum\u00ednio sob press\u00e3o, o alum\u00ednio fundido reage com o ferro, formando camadas intermet\u00e1licas. Isso leva \u00e0 ader\u00eancia, rasgos e danos superficiais durante a eje\u00e7\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Esse comportamento \u00e9 influenciado principalmente pela composi\u00e7\u00e3o do material base e se torna mais severo sob exposi\u00e7\u00e3o a altas temperaturas e ciclos prolongados.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">A\u00e7os para ferramentas recomendados<\/h2>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-63de5395\">\n<div class=\"wp-block-uagb-advanced-heading uagb-block-85bcb587\"><h3 class=\"uagb-heading-text\">H13 (1.2344 \/ SKD61)<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">O H13 \u00e9 a escolha padr\u00e3o para a maioria dos insertos de fundi\u00e7\u00e3o sob press\u00e3o, pois oferece uma combina\u00e7\u00e3o equilibrada de resist\u00eancia \u00e0 fadiga t\u00e9rmica e tenacidade.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Apresenta desempenho confi\u00e1vel sob ciclos de aquecimento e resfriamento e pode operar em condi\u00e7\u00f5es de resfriamento a \u00e1gua sem rachaduras imediatas. Isso o torna adequado para fundi\u00e7\u00e3o sob press\u00e3o de alum\u00ednio, magn\u00e9sio e zinco em ciclos de alta frequ\u00eancia.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A faixa de dureza t\u00edpica \u00e9 de 46 a 52 HRC, ajustada para equilibrar a resist\u00eancia ao desgaste e \u00e0 fratura.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O H13 deve ser considerado o material de refer\u00eancia quando a falha se distribui entre degrada\u00e7\u00e3o superficial e fissura\u00e7\u00e3o moderada.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-50 hs-cta-trigger-button hs-cta-trigger-button-230288465624\"><a class=\"wp-block-button__link wp-element-button\">Enviar consulta agora<\/a><\/div>\n\n\n\n<div class=\"wp-block-button has-custom-width wp-block-button__width-50 is-style-outline is-style-outline--1\"><a class=\"wp-block-button__link has-ast-global-color-3-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/aobosteel.com\/pt\/h13-tool-steel\/\" style=\"background-color:#ffffff08\">Veja os detalhes de fornecimento do H13<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-24c4ad1d\">\n<div class=\"wp-block-uagb-advanced-heading uagb-block-518cfdf1\"><h3 class=\"uagb-heading-text\">H11 (1.2343 \/ SKD6)<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">H11 \u00e9 selecionado quando a falha \u00e9 predominantemente causada por fissuras em vez de desgaste.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Em compara\u00e7\u00e3o com o H13, oferece maior tenacidade e melhor resist\u00eancia \u00e0 fratura, tornando-o adequado para n\u00facleos de pequena se\u00e7\u00e3o transversal, transi\u00e7\u00f5es abruptas e geometrias complexas com altas concentra\u00e7\u00f5es de tens\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Na pr\u00e1tica, quando as pastilhas H13 falham prematuramente devido a fissuras, a substitui\u00e7\u00e3o por H11 costuma ser mais eficaz do que o ajuste de dureza ou o tratamento t\u00e9rmico.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A faixa de dureza t\u00edpica \u00e9 de 42 a 47 HRC, frequentemente ajustada para baixo para melhorar ainda mais a resist\u00eancia \u00e0 fratura.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-50 hs-cta-trigger-button hs-cta-trigger-button-230288465624\"><a class=\"wp-block-button__link wp-element-button\">Enviar consulta agora<\/a><\/div>\n\n\n\n<div class=\"wp-block-button has-custom-width wp-block-button__width-50 is-style-outline is-style-outline--2\"><a class=\"wp-block-button__link has-ast-global-color-3-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/aobosteel.com\/pt\/h11-tool-steel\/\" style=\"background-color:#ffffff00\">Veja os detalhes de fornecimento do H11<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-14d079be\">\n<div class=\"wp-block-uagb-advanced-heading uagb-block-7c5868c4\"><h3 class=\"uagb-heading-text\">H21 (1,2581)<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">O H21 \u00e9 utilizado em ambientes de fundi\u00e7\u00e3o de alta temperatura, como ligas de lat\u00e3o e cobre, onde o amolecimento t\u00e9rmico se torna o principal modo de falha.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Seu alto teor de tungst\u00eanio permite que ele mantenha a dureza em temperaturas elevadas, onde o H13 come\u00e7aria a perder resist\u00eancia. Isso reduz significativamente a deforma\u00e7\u00e3o e o desgaste sob calor extremo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">No entanto, o H21 possui baixa resist\u00eancia e \u00e9 sens\u00edvel ao choque t\u00e9rmico. N\u00e3o \u00e9 adequado para sistemas de refrigera\u00e7\u00e3o a \u00e1gua ou para ciclos t\u00e9rmicos r\u00e1pidos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A faixa de dureza t\u00edpica \u00e9 de 40 a 44 HRC.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-50 hs-cta-trigger-button hs-cta-trigger-button-230288465624\"><a class=\"wp-block-button__link wp-element-button\">Enviar consulta agora<\/a><\/div>\n\n\n\n<div class=\"wp-block-button has-custom-width wp-block-button__width-50 is-style-outline is-style-outline--3\"><a class=\"wp-block-button__link has-ast-global-color-3-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/aobosteel.com\/pt\/h21-tool-steel\/\" style=\"background-color:#ffffff00\">Veja os detalhes de fornecimento do semestre 21.<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-14d079be\">\n<div class=\"wp-block-uagb-advanced-heading uagb-block-8f95b674\"><h3 class=\"uagb-heading-text\">P20 (1,2311 \/ 1,2738)<\/h3><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">O P20 normalmente n\u00e3o \u00e9 usado para insertos de fundi\u00e7\u00e3o sob alta carga. Sua fun\u00e7\u00e3o \u00e9 principalmente estrutural ou relacionada a custos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c9 comumente utilizado em blocos de fixa\u00e7\u00e3o, insertos de grande porte com baixa tens\u00e3o ou em aplica\u00e7\u00f5es com ligas de zinco onde a carga t\u00e9rmica \u00e9 limitada. Sua vantagem reside na usinabilidade, estabilidade dimensional e menor custo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A dureza t\u00edpica \u00e9 de 28 a 32 HRC (\u2248300 HB), com variantes de dureza mais alta usadas seletivamente em aplica\u00e7\u00f5es de insertos de baixa exig\u00eancia.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-50 hs-cta-trigger-button hs-cta-trigger-button-230288465624\"><a class=\"wp-block-button__link wp-element-button\">Enviar consulta agora<\/a><\/div>\n\n\n\n<div class=\"wp-block-button has-custom-width wp-block-button__width-50 is-style-outline is-style-outline--4\"><a class=\"wp-block-button__link has-ast-global-color-3-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/aobosteel.com\/pt\/p20-tool-steel\/\" style=\"background-color:#ffffff00\">Veja os detalhes de fornecimento do P20<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Resumo da Sele\u00e7\u00e3o Pr\u00e1tica<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>A\u00e7o para ferramentas<\/strong><\/td><td><strong>Ponto Forte Principal<\/strong><\/td><td><strong>Limita\u00e7\u00e3o<\/strong><\/td><td><strong>Quando usar<\/strong><\/td><\/tr><tr><td><strong>H13<\/strong><\/td><td>Equil\u00edbrio entre resist\u00eancia \u00e0 fadiga t\u00e9rmica e tenacidade.<\/td><td>N\u00e3o otimizado para temperaturas extremas ou concentra\u00e7\u00f5es de estresse severas.<\/td><td>Pastilhas gerais para fundi\u00e7\u00e3o sob press\u00e3o de Al\/Mg\/Zn<\/td><\/tr><tr><td><strong>H11<\/strong><\/td><td>Maior tenacidade, melhor resist\u00eancia a rachaduras<\/td><td>Menor resist\u00eancia a quente do que H13<\/td><td>n\u00facleos pequenos, complexos ou de alta tens\u00e3o<\/td><\/tr><tr><td><strong>H21<\/strong><\/td><td>Dureza superior em altas temperaturas<\/td><td>Baixa resist\u00eancia, sens\u00edvel a choques t\u00e9rmicos.<\/td><td>Fundi\u00e7\u00e3o de lat\u00e3o\/cobre com alta carga t\u00e9rmica<\/td><\/tr><tr><td><strong>P20<\/strong><\/td><td>Econ\u00f4mico e f\u00e1cil de usinar.<\/td><td>Desempenho limitado em altas temperaturas<\/td><td>Blocos de suporte ou aplica\u00e7\u00f5es de zinco com baixa carga<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Orienta\u00e7\u00f5es para a Decis\u00e3o Final<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A sele\u00e7\u00e3o de materiais deve come\u00e7ar pela forma como os insertos falham durante a produ\u00e7\u00e3o.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Se a falha for dominada por fissuras t\u00e9rmicas e degrada\u00e7\u00e3o da superf\u00edcie, o H13 oferece o desempenho geral mais est\u00e1vel.<\/li>\n\n\n\n<li>Se as pastilhas falharem por fissuras, especialmente em se\u00e7\u00f5es finas ou complexas, a troca de H13 para H11 geralmente \u00e9 mais eficaz do que aumentar a dureza.<\/li>\n\n\n\n<li>Caso ocorra deforma\u00e7\u00e3o ou eros\u00e3o sob alta temperatura, a atualiza\u00e7\u00e3o para H21 torna-se necess\u00e1ria, desde que o choque t\u00e9rmico possa ser controlado.<\/li>\n\n\n\n<li>Se a carga t\u00e9rmica for baixa e a redu\u00e7\u00e3o de custos for a prioridade, o P20 \u00e9 suficiente para componentes n\u00e3o cr\u00edticos.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-\">Na Aobo Steel, esses a\u00e7os s\u00e3o fornecidos em condi\u00e7\u00e3o recozida ou pr\u00e9-endurecida para aquisi\u00e7\u00e3o em grandes quantidades, permitindo que distribuidores e fabricantes realizem usinagem e tratamento t\u00e9rmico final de acordo com suas pr\u00f3prias necessidades de ferramentas.<\/p>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Selection of Tool Steel for Die Casting Cores and Inserts Cores and inserts are typically the first components to fail in die casting tooling. Their lifespan directly determines maintenance frequency, tooling cost, and production downtime. During operation, molten metal enters the cavity under pressures of 20\u2013150 MPa, with extreme cases reaching 700 MPa. At the [&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":"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":"","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":""},"class_list":["post-12376","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.3 (Yoast SEO v28.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Die Casting Tool Steel Selection Guide for Cores &amp; Inserts | Bulk Supply<\/title>\n<meta name=\"description\" content=\"A practical selection guide for die casting tool steel. Understand when to use H13, H11, H21, or P20 based on failure conditions and bulk supply requirements.\" \/>\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\/pt\/selection-of-tool-steel-for-die-casting-cores-and-inserts\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Die Casting Tool Steel Selection Guide for Cores &amp; Inserts | Bulk Supply\" \/>\n<meta property=\"og:description\" content=\"A practical selection guide for die casting tool steel. 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