{"id":12179,"date":"2026-01-12T13:32:44","date_gmt":"2026-01-12T05:32:44","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=12179"},"modified":"2026-09-22T15:05:50","modified_gmt":"2026-09-22T07:05:50","slug":"selection-of-tool-steel-for-hot-shear-blades","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/selection-of-tool-steel-for-hot-shear-blades\/","title":{"rendered":"Guia de Sele\u00e7\u00e3o de A\u00e7o para L\u00e2minas de Corte a Quente | Fornecedor H13 H21 S7 A8"},"content":{"rendered":"<section class=\"aobo-hot-shear-blade-selection-page\">\n  <style>\n    .aobo-hot-shear-blade-selection-page {\n      --aobo-blue: #0c56d0;\n      --aobo-blue-soft: #eaf2ff;\n      --aobo-border: #d7e5fb;\n      --aobo-text: #203044;\n      --aobo-muted: #617087;\n      --aobo-orange: #f59b23;\n      --aobo-shadow: 0 18px 45px rgba(12, 86, 208, 0.10);\n      font-family: inherit;\n      color: var(--aobo-text);\n      line-height: 1.7;\n      background: transparent;\n   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durante a forjagem ou extrus\u00e3o. Embora o material esteja amolecido, a deforma\u00e7\u00e3o n\u00e3o \u00e9 uniforme, portanto a l\u00e2mina deve suportar simultaneamente altas tens\u00f5es de cisalhamento e compress\u00e3o para completar a separa\u00e7\u00e3o. Durante a opera\u00e7\u00e3o, a aresta de corte fica exposta ao contato deslizante contra a camada de \u00f3xido, enquanto o aquecimento repetido e o resfriamento intermitente geram fortes gradientes t\u00e9rmicos.<\/p>\n      <p>Em servi\u00e7o, a falha \u00e9 regida por mecanismos identific\u00e1veis. Se o a\u00e7o n\u00e3o consegue manter sua resist\u00eancia \u00e0 temperatura, a aresta se deforma plasticamente, aumentando a for\u00e7a de corte e acelerando o desgaste. A camada de \u00f3xido promove o desgaste abrasivo cont\u00ednuo ao longo da aresta. A ciclagem t\u00e9rmica produz tens\u00e3o superficial que inicia trincas, as quais podem se propagar e levar \u00e0 falha da aresta. A sele\u00e7\u00e3o do a\u00e7o ferramenta, portanto, concentra-se em manter a estabilidade da aresta sob temperatura, carga e tens\u00e3o t\u00e9rmica c\u00edclica.<\/p>\n    <\/header>\n\n    <main class=\"aobo-article\">\n      <h2>Fatores de sele\u00e7\u00e3o<\/h2>\n      <p>O desempenho das l\u00e2minas de corte a quente depende da capacidade do material de resistir aos modos de falha predominantes sob condi\u00e7\u00f5es operacionais espec\u00edficas. Esses requisitos s\u00e3o interdependentes e devem ser avaliados em conjunto.<\/p>\n      <p>A dureza a quente indica a capacidade da aresta de corte de resistir \u00e0 deforma\u00e7\u00e3o pl\u00e1stica em altas temperaturas. Se a resist\u00eancia a quente for insuficiente, a aresta arredonda em vez de cortar, levando a uma r\u00e1pida perda de efici\u00eancia de corte.<\/p>\n      <p>A tenacidade controla a resist\u00eancia ao lascamento da aresta sob carga din\u00e2mica. Na pr\u00e1tica, desalinhamento, ac\u00famulo de escamas ou se\u00e7\u00f5es irregulares introduzem impacto localizado, tornando a tenacidade insuficiente uma das principais causas de falha prematura da aresta.<\/p>\n      <p>A resist\u00eancia \u00e0 fadiga t\u00e9rmica determina o in\u00edcio de trincas sob ciclos repetidos de aquecimento e resfriamento. Materiais com resist\u00eancia suficiente em altas temperaturas retardam a forma\u00e7\u00e3o e a propaga\u00e7\u00e3o de trincas, prolongando a vida \u00fatil em condi\u00e7\u00f5es c\u00edclicas.<\/p>\n      <p>A resist\u00eancia \u00e0 abras\u00e3o determina a rapidez com que a l\u00e2mina se desgasta devido \u00e0 forma\u00e7\u00e3o de \u00f3xido e ao contato deslizante. O aumento da resist\u00eancia ao desgaste melhora a reten\u00e7\u00e3o do fio, mas deve ser equilibrado com a tenacidade para evitar fraturas fr\u00e1geis.<\/p>\n      <p>Na sele\u00e7\u00e3o pr\u00e1tica, o n\u00edvel de temperatura define a dureza a quente necess\u00e1ria, enquanto a intensidade do resfriamento e a severidade do impacto determinam a tenacidade e a resist\u00eancia \u00e0 fadiga t\u00e9rmica necess\u00e1rias.<\/p>\n\n      <h2>A\u00e7os para ferramentas recomendados<\/h2>\n      <div class=\"aobo-grade-card\">\n        <h3 id=\"h-h13-tool-steel-supplier-1-2344-skd61\">Fornecedor de a\u00e7o ferramenta H13 | 1.2344 | SKD61<\/h3>\n        <p>O a\u00e7o H13 \u00e9 a escolha padr\u00e3o quando se exigem tanto resist\u00eancia \u00e0 fadiga t\u00e9rmica quanto tenacidade. Com dureza de 45\u201350 HRC, mant\u00e9m resist\u00eancia a quente suficiente para resistir \u00e0 deforma\u00e7\u00e3o, preservando a resist\u00eancia ao impacto. Sua liga proporciona desempenho est\u00e1vel sob aquecimento c\u00edclico, tornando-o adequado para condi\u00e7\u00f5es que envolvem resfriamento intermitente a \u00e1gua ou ar. \u00c9 geralmente selecionado quando choque t\u00e9rmico e carregamento mec\u00e2nico est\u00e3o presentes simultaneamente.<\/p>\n        <div class=\"aobo-cta-row\"><div class=\"popmake-16052 hs-cta-trigger-button hs-cta-trigger-button-230288465624\"><a class=\"aobo-btn aobo-btn-primary\">Enviar consulta agora<\/a><\/div><a class=\"aobo-btn aobo-btn-secondary\" href=\"https:\/\/aobosteel.com\/pt\/h13-tool-steel\/\">Veja os detalhes de fornecimento de materiais H13<\/a><\/div>\n      <\/div>\n      <div class=\"aobo-grade-card\">\n        <h3 id=\"h-aisi-h21-tool-steel-1-2581-skd5\">A\u00e7o ferramenta AISI H21 | 1.2581 | SKD5<\/h3>\n        <p>O a\u00e7o H21 \u00e9 utilizado quando a resist\u00eancia ao amolecimento em altas temperaturas \u00e9 o requisito fundamental. Sua estrutura de carboneto rica em tungst\u00eanio mant\u00e9m a dureza em temperaturas de at\u00e9 aproximadamente 620 \u00b0C, permitindo que a aresta de corte resista \u00e0 deforma\u00e7\u00e3o sob calor cont\u00ednuo. No entanto, sua menor resist\u00eancia ao choque t\u00e9rmico limita seu uso a condi\u00e7\u00f5es t\u00e9rmicas est\u00e1veis, sem resfriamento agressivo. \u00c9 mais adequado para corte cont\u00ednuo em altas temperaturas, onde a deforma\u00e7\u00e3o, e n\u00e3o a fissura\u00e7\u00e3o, \u00e9 o principal risco.<\/p>\n        <div class=\"aobo-cta-row\"><div class=\"popmake-16052 hs-cta-trigger-button hs-cta-trigger-button-230288465624\"><a class=\"aobo-btn aobo-btn-primary\">Enviar consulta agora<\/a><\/div><a class=\"aobo-btn aobo-btn-secondary\" href=\"https:\/\/aobosteel.com\/pt\/h21-tool-steel\/\">Veja os detalhes do fornecimento de materiais do H21.<\/a><\/div>\n      <\/div>\n      <div class=\"aobo-grade-card\">\n        <h3 id=\"h-aisi-s7-tool-steel-supplier-din-1-2355\">Fornecedor de a\u00e7o ferramenta AISI S7 | DIN 1.2355<\/h3>\n        <p>O a\u00e7o S7 \u00e9 selecionado quando o impacto \u00e9 o principal fator de falha. Sua alta tenacidade permite que ele resista ao lascamento em condi\u00e7\u00f5es de corte intermitentes ou inst\u00e1veis. Embora sua dureza a quente seja menor do que a dos a\u00e7os para trabalho a quente, ele pode ser usado em aplica\u00e7\u00f5es onde as temperaturas s\u00e3o moderadas e o choque mec\u00e2nico determina a vida \u00fatil da ferramenta. \u00c9 tipicamente usado onde a falha da aresta de corte ocorre por lascamento, em vez de amolecimento ou desgaste.<\/p>\n        <div class=\"aobo-cta-row\"><div class=\"popmake-16052 hs-cta-trigger-button hs-cta-trigger-button-230288465624\"><a class=\"aobo-btn aobo-btn-primary\">Enviar consulta agora<\/a><\/div><a class=\"aobo-btn aobo-btn-secondary\" href=\"https:\/\/aobosteel.com\/pt\/s7-tool-steel\/\">Veja os detalhes de fornecimento do material S7<\/a><\/div>\n      <\/div>\n      <div class=\"aobo-grade-card\">\n        <h3>AISI A8 (A\u00e7o de alta tenacidade para trabalho a frio\/quente)<\/h3>\n        <p>O a\u00e7o A8 \u00e9 aplicado em situa\u00e7\u00f5es onde a temperatura permanece moderada, mas o desgaste abrasivo e a carga mec\u00e2nica s\u00e3o significativos. Abaixo de aproximadamente 480 \u00b0C, ele oferece melhor resist\u00eancia ao desgaste do que o H13, mantendo uma tenacidade adequada. Isso o torna ideal para usinagem de pe\u00e7as de grande espessura, onde a distribui\u00e7\u00e3o de carga \u00e9 irregular e o desgaste da aresta de corte, em vez do amolecimento t\u00e9rmico, limita a vida \u00fatil da ferramenta.<\/p>\n      <\/div>\n\n      <h2>Tabela Resumo<\/h2>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Classe de a\u00e7o ferramenta<\/th><th>Dureza t\u00edpica<\/th><th>Vantagem prim\u00e1ria<\/th><th>Melhor caso de uso<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>AISI H13<\/td><td>45\u201350 HRC<\/td><td>Resist\u00eancia equilibrada \u00e0 fadiga t\u00e9rmica e ao impacto.<\/td><td>Cisalhamento a quente geral com ciclos t\u00e9rmicos e resfriamento<\/td><\/tr>\n            <tr><td>AISI H21<\/td><td>45\u201350 HRC<\/td><td>Alta resist\u00eancia ao amolecimento em temperaturas elevadas.<\/td><td>Corte cont\u00ednuo em alta temperatura sem resfriamento r\u00e1pido<\/td><\/tr>\n            <tr><td>AISI S7<\/td><td>54\u201358 HRC<\/td><td>Alta resist\u00eancia a impactos<\/td><td>Corte intermitente onde o lascamento \u00e9 predominante<\/td><\/tr>\n            <tr><td>AISI A8<\/td><td>52\u201356 HRC<\/td><td>Resist\u00eancia ao desgaste em temperaturas moderadas<\/td><td>Se\u00e7\u00f5es espessas com temperatura controlada (&lt;480\u00b0C)<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n    <\/main>\n  <\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>Selection of Tool Steel for Hot Shear Blades Hot shearing is used to cut heated bars, billets, and heavy sections during forging or extrusion. Although the material is softened, deformation is non-uniform, so the blade must simultaneously withstand high shear and compressive stresses to complete separation. During operation, the cutting edge is exposed to sliding [&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-12179","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.5 (Yoast SEO v28.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Hot Shear Blade Tool Steel Selection Guide | H13 H21 S7 A8 Supplier<\/title>\n<meta name=\"description\" content=\"Learn how to select tool steel for hot shear blades based on temperature, impact, and wear conditions. 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