{"id":11772,"date":"2025-12-29T13:44:30","date_gmt":"2025-12-29T05:44:30","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=11772"},"modified":"2026-04-02T13:49:57","modified_gmt":"2026-04-02T05:49:57","slug":"selection-of-tool-steel-for-aluminum-extrusion-dies","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/selection-of-tool-steel-for-aluminum-extrusion-dies\/","title":{"rendered":"Sele\u00e7\u00e3o de a\u00e7o para matrizes de extrus\u00e3o de alum\u00ednio | Fornecedor de a\u00e7o ferramenta H11 vs H12 vs H13"},"content":{"rendered":"
\n

Sele\u00e7\u00e3o de a\u00e7o ferramenta para matrizes de extrus\u00e3o de alum\u00ednio<\/h1>\n\n\n\n

A extrus\u00e3o de alum\u00ednio \u00e9 um processo de conforma\u00e7\u00e3o de alta press\u00e3o no qual tarugos aquecidos (tipicamente entre 340 e 510 \u00b0C) s\u00e3o for\u00e7ados atrav\u00e9s de uma matriz. Durante a opera\u00e7\u00e3o, a matriz \u00e9 submetida a uma tens\u00e3o compressiva sustentada, frequentemente atingindo 1035 MPa (150 ksi), combinada com exposi\u00e7\u00e3o t\u00e9rmica cont\u00ednua.<\/p>\n\n\n\n

Como a extrus\u00e3o normalmente \u00e9 realizada sem lubrifica\u00e7\u00e3o, o alum\u00ednio tende a aderir \u00e0 superf\u00edcie da matriz, aumentando o atrito e a tens\u00e3o de cisalhamento na interface. Em servi\u00e7o, a falha da matriz \u00e9 causada principalmente por tr\u00eas mecanismos: desgaste abrasivo devido ao fluxo de metal, desgaste adesivo devido \u00e0 ader\u00eancia e fadiga t\u00e9rmica (fissura\u00e7\u00e3o por calor). A fissura\u00e7\u00e3o por calor se manifesta como uma rede de trincas superficiais causadas por aquecimento e resfriamento repetidos, e geralmente \u00e9 o principal fator que limita a vida \u00fatil da matriz.<\/p>\n\n\n\n

Fatores de sele\u00e7\u00e3o<\/h2>\n\n\n\n

A sele\u00e7\u00e3o do a\u00e7o ferramenta deve ser baseada na resist\u00eancia aos modos de falha reais observados em servi\u00e7o de extrus\u00e3o.<\/p>\n\n\n\n

Dureza a quente (resist\u00eancia \u00e0 t\u00eampera)
<\/strong>A dureza a quente insuficiente leva ao amolecimento e \u00e0 deforma\u00e7\u00e3o pl\u00e1stica sob carga, resultando em distor\u00e7\u00e3o do perfil e desgaste acelerado durante longos processos de extrus\u00e3o.<\/p>\n\n\n\n

Robustez
<\/strong>O risco de fissuras aumenta sob alta tens\u00e3o, especialmente em matrizes grandes, geometrias complexas ou condi\u00e7\u00f5es de extrus\u00e3o inst\u00e1veis. Uma maior tenacidade reduz a probabilidade de fissuras extensas e falhas prematuras.<\/p>\n\n\n\n

Resist\u00eancia ao desgaste
<\/strong>A ades\u00e3o e o deslizamento entre o alum\u00ednio e a superf\u00edcie da matriz causam perda cont\u00ednua de material. O aumento da dureza melhora a resist\u00eancia ao desgaste, mas reduz a tenacidade, tornando o aparecimento de fissuras nas bordas mais prov\u00e1vel.<\/p>\n\n\n\n

Resist\u00eancia ao rachamento por calor
<\/strong>A resist\u00eancia \u00e0 fadiga t\u00e9rmica determina o qu\u00e3o bem o chip suporta a expans\u00e3o e contra\u00e7\u00e3o c\u00edclicas. Uma resist\u00eancia baixa leva \u00e0 forma\u00e7\u00e3o de redes de fissuras superficiais que se propagam, reduzindo a vida \u00fatil do chip.<\/p>\n\n\n\n

A\u00e7os para ferramentas recomendados<\/h2>\n\n\n\n

Dureza de trabalho t\u00edpica: 42\u201350 HRC. As diferen\u00e7as de desempenho s\u00e3o determinadas pela composi\u00e7\u00e3o e estrutura do carboneto.<\/p>\n\n\n\n

\n

A\u00e7o ferramenta AISI H11 | 1.2343 | SKD6<\/h3>\n\n\n\n

O H11 \u00e9 um a\u00e7o ferramenta para trabalho a quente com cromo 5% e teor relativamente baixo de van\u00e1dio, resultando em menor volume de carbonetos e maior tenacidade.<\/p>\n\n\n\n

\u00c9 selecionado quando a fissura\u00e7\u00e3o \u00e9 o principal risco de falha, como em matrizes grandes, se\u00e7\u00f5es espessas ou aplica\u00e7\u00f5es com alto impacto mec\u00e2nico. Comparado ao H13, oferece melhor resist\u00eancia ao choque t\u00e9rmico, mas menor resist\u00eancia ao desgaste.<\/p>\n\n\n\n

\n
Enviar consulta agora<\/a><\/div>\n\n\n\n
Veja os detalhes de fornecimento de materiais H11<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n
\n

Fornecedor de a\u00e7o ferramenta H13 | 1.2344 | SKD61<\/h3>\n\n\n\n

O H13 cont\u00e9m aproximadamente 1,0% de van\u00e1dio, formando carbonetos est\u00e1veis que melhoram a resist\u00eancia ao desgaste.<\/p>\n\n\n\n

\u00c9 a escolha padr\u00e3o para matrizes de extrus\u00e3o de alum\u00ednio onde se exige um equil\u00edbrio entre resist\u00eancia ao desgaste e tenacidade. Na maioria das aplica\u00e7\u00f5es gerais de extrus\u00e3o, o H13 oferece resist\u00eancia suficiente tanto ao desgaste quanto \u00e0 fissura\u00e7\u00e3o. A nitreta\u00e7\u00e3o \u00e9 comumente aplicada para melhorar a dureza superficial e reduzir o desgaste adesivo sem comprometer a tenacidade do n\u00facleo.<\/p>\n\n\n\n

\n
Enviar consulta agora<\/a><\/div>\n\n\n\n
Veja os detalhes de fornecimento de materiais H13<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n
\n

AISI H12<\/h3>\n\n\n\n

O H12 cont\u00e9m tungst\u00eanio, o que melhora a resist\u00eancia ao amolecimento em temperaturas elevadas.<\/p>\n\n\n\n

\u00c9 utilizado quando as matrizes s\u00e3o submetidas a exposi\u00e7\u00e3o t\u00e9rmica prolongada e exigem maior resist\u00eancia \u00e0 deforma\u00e7\u00e3o do que o H11, mantendo ainda uma tenacidade razo\u00e1vel. \u00c9 adequado para longos ciclos de produ\u00e7\u00e3o nos quais o amolecimento, em vez de fissuras, limita a vida \u00fatil da matriz.<\/p>\n<\/div>\n\n\n\n

Tabela de compara\u00e7\u00e3o resumida<\/h2>\n\n\n\n
A\u00e7o ferramenta de alta qualidade<\/td>Caracter\u00edsticas principais<\/td>Vantagem prim\u00e1ria<\/td><\/tr>
AISI H11<\/td>5% Cr, baixo V<\/td>Melhor resist\u00eancia a rachaduras e choque t\u00e9rmico.<\/td><\/tr>
AISI H12<\/td>5% Cr, W-ligado<\/td>Melhor resist\u00eancia ao amolecimento em altas temperaturas<\/td><\/tr>
AISI H13<\/td>5% Cr, ~1,0% V<\/td>Equil\u00edbrio entre resist\u00eancia ao desgaste e tenacidade; adequado para nitreta\u00e7\u00e3o.<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"

Selection of Tool Steel for Aluminum Extrusion Dies Aluminum extrusion is a high-pressure forming process in which heated billets (typically 340\u2013510\u00b0C) are forced through a die. During operation, the die is subjected to sustained compressive stress, often reaching 1035 MPa (150 ksi), combined with continuous thermal exposure. Because extrusion is typically performed without lubrication, aluminum […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"content-type":"","_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-11772","page","type-page","status-publish","hentry"],"yoast_head":"\nAluminum Extrusion Die Steel Selection | H11 vs H12 vs H13 Tool Steel Supplier<\/title>\n<meta name=\"description\" content=\"Compare H11, H12, and H13 tool steel for aluminum extrusion dies. 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During operation, the die is subjected to sustained compressive stress, often reaching 1035 MPa (150 ksi), combined with continuous thermal exposure. Because extrusion is typically performed without lubrication, aluminum…","rttpg_featured_image_url":null,"rttpg_author":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/pt\/blog\/author\/admin\/"},"rttpg_comment":0,"rttpg_category":null,"rttpg_excerpt":"Selection of Tool Steel for Aluminum Extrusion Dies Aluminum extrusion is a high-pressure forming process in which heated billets (typically 340\u2013510\u00b0C) are forced through a die. During operation, the die is subjected to sustained compressive stress, often reaching 1035 MPa (150 ksi), combined with continuous thermal exposure. 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