{"id":11470,"date":"2025-12-19T14:43:39","date_gmt":"2025-12-19T06:43:39","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=11470"},"modified":"2026-09-15T13:06:50","modified_gmt":"2026-09-15T05:06:50","slug":"selection-guide-high-speed-steel-hss-cutting-tools","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/selection-guide-high-speed-steel-hss-cutting-tools\/","title":{"rendered":"Sele\u00e7\u00e3o de a\u00e7os para ferramentas de corte de alta velocidade | Guia de classes de a\u00e7o r\u00e1pido (HSS) | Fornecedor de a\u00e7o Aobo"},"content":{"rendered":"
\n

Sele\u00e7\u00e3o de a\u00e7o ferramenta para corte de alta velocidade (HSC)<\/h1>\n\n\n\n

O corte de alta velocidade (HSC, na sigla em ingl\u00eas) opera em velocidades de corte e taxas de remo\u00e7\u00e3o de material muito elevadas, gerando taxas de deforma\u00e7\u00e3o e temperaturas extremas na interface ferramenta-pe\u00e7a. A deforma\u00e7\u00e3o pl\u00e1stica produz deforma\u00e7\u00f5es de cisalhamento de 2 a 5 e taxas de deforma\u00e7\u00e3o de at\u00e9 10\u207b\u2075 s\u207b\u00b9.5<\/sup>s-1<\/sup> (localmente atingindo 107<\/sup>s-1<\/sup>), com temperaturas de interface frequentemente superiores a 1000\u2103.<\/p>\n\n\n\n

Nessas temperaturas, o desempenho da ferramenta deixa de ser controlado pela dureza \u00e0 temperatura ambiente. A falha da ferramenta \u00e9 dominada pelo desgaste por difus\u00e3o (forma\u00e7\u00e3o de crateras), desgaste abrasivo da face de corte, lascamento da aresta de corte e amolecimento t\u00e9rmico r\u00e1pido. Quando a dureza diminui em temperaturas elevadas, a deforma\u00e7\u00e3o pl\u00e1stica e o desgaste aceleram, levando \u00e0 perda de estabilidade da aresta de corte.<\/p>\n\n\n\n

Principais fatores de sele\u00e7\u00e3o<\/h2>\n\n\n\n

No HSC, a sele\u00e7\u00e3o do material \u00e9 limitada principalmente pelo desempenho em altas temperaturas, e n\u00e3o pela dureza ou resist\u00eancia convencionais. O ponto-chave \u00e9 manter a integridade do gume sob carregamento t\u00e9rmico e mec\u00e2nico combinado. Para ferramentas de corte padr\u00e3o, como fresas de topo e brochas, as op\u00e7\u00f5es de grau est\u00e3o em Guia de sele\u00e7\u00e3o de ferramentas de corte de a\u00e7o r\u00e1pido<\/a>.<\/p>\n\n\n\n

Dureza Quente (Dureza Vermelha)
<\/strong>Essa \u00e9 a principal restri\u00e7\u00e3o. O a\u00e7o deve manter a dureza e resistir ao amolecimento por revenido acima de 600\u20131000 \u00b0C. Se a dureza cair abaixo da temperatura de corte, a aresta se deforma plasticamente e a taxa de desgaste aumenta drasticamente.<\/p>\n\n\n\n

Resist\u00eancia ao desgaste
<\/strong>A resist\u00eancia ao desgaste depende da dureza da matriz e das caracter\u00edsticas dos carbonetos. Carbonetos finos e uniformemente distribu\u00eddos (MC, M6C) melhoram a resist\u00eancia ao desgaste por abras\u00e3o e difus\u00e3o. No entanto, um volume excessivo de carbonetos ou carbonetos grosseiros aumentam a fragilidade e promovem o lascamento das arestas sob ciclos t\u00e9rmicos.<\/p>\n\n\n\n

Robustez
<\/strong>Ciclos t\u00e9rmicos e cargas de corte intermitentes introduzem choques mec\u00e2nicos repetidos. A tenacidade insuficiente leva a lascamento e falha da aresta de corte, especialmente em fresamento ou corte interrompido. O aumento da resist\u00eancia ao desgaste pelo aumento do teor de liga normalmente reduz a tenacidade, portanto, o equil\u00edbrio deve ser adequado \u00e0s condi\u00e7\u00f5es de corte.<\/p>\n\n\n\n

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

A\u00e7o ferramenta AISI M42 | 1.3247 | SKH59<\/h3>\n\n\n\n

O a\u00e7o M42 \u00e9 utilizado em aplica\u00e7\u00f5es onde a temperatura de corte \u00e9 o principal fator limitante. Seu teor de cobalto de aproximadamente 8% melhora o endurecimento secund\u00e1rio e retarda o amolecimento t\u00e9rmico, permitindo uma dureza de trabalho de 68\u201370 HRC.
\u00c9 adequado para usinagem de ligas de tit\u00e2nio e superligas \u00e0 base de n\u00edquel, onde as temperaturas de corte permanecem elevadas. Comparado ao M4, possui menor tenacidade, portanto, condi\u00e7\u00f5es de corte est\u00e1veis e configura\u00e7\u00f5es r\u00edgidas s\u00e3o necess\u00e1rias para evitar lascamento.<\/p>\n\n\n\n

\n
Enviar consulta agora<\/a><\/div>\n\n\n\n
Veja os detalhes de fornecimento de material M42.<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n
\n

A\u00e7o r\u00e1pido AISI T15 (Tungst\u00eanio-Van\u00e1dio-Cobalto)<\/h3>\n\n\n\n

O a\u00e7o T15 \u00e9 selecionado quando o desgaste abrasivo \u00e9 o principal modo de falha. O alto teor de van\u00e1dio (~5%) forma um grande volume de carbonetos MC duros, melhorando significativamente a resist\u00eancia \u00e0 abras\u00e3o em compara\u00e7\u00e3o com os a\u00e7os r\u00e1pidos convencionais, como o M2.
\u00c9 adequado para materiais de alta resist\u00eancia e alta tens\u00e3o onde o desgaste da aresta \u00e9 predominante. No entanto, a menor tenacidade limita seu uso em cortes interrompidos.<\/p>\n<\/div>\n\n\n\n

\n

AISI M4 (A\u00e7o r\u00e1pido com alto teor de van\u00e1dio)<\/h3>\n\n\n\n

O a\u00e7o M4 \u00e9 utilizado em condi\u00e7\u00f5es onde a resist\u00eancia ao desgaste abrasivo \u00e9 importante, mas ainda se exige alguma tenacidade. Com van\u00e1dio ~4%, ele proporciona boa resist\u00eancia ao desgaste, mantendo uma tenacidade superior \u00e0 do a\u00e7o T15.
A dureza t\u00edpica \u00e9 de 62\u201364 HRC. \u00c9 adequada para usinagem de ferro fundido, lat\u00e3o e a\u00e7os temperados, onde s\u00e3o necess\u00e1rias estabilidade de aresta e resist\u00eancia a lascas.<\/p>\n<\/div>\n\n\n\n

\n

A\u00e7os produzidos por metalurgia do p\u00f3 (P\/M) (ex.: ASP 60 \/ CPM Rex 76)<\/h3>\n\n\n\n

Os a\u00e7os P\/M resolvem o problema da segrega\u00e7\u00e3o de carbonetos em a\u00e7os r\u00e1pidos convencionais, produzindo uma microestrutura uniforme. Isso permite um maior teor de liga, mantendo uma tenacidade adequada.
Esses a\u00e7os normalmente atingem 67\u201369 HRC e oferecem desempenho mais est\u00e1vel sob condi\u00e7\u00f5es combinadas de alta temperatura, desgaste e choque. S\u00e3o adequados para aplica\u00e7\u00f5es exigentes de a\u00e7os de alta resist\u00eancia (HSC) que requerem tanto dureza a quente quanto estabilidade de borda.<\/p>\n<\/div>\n\n\n\n

Tabela Resumo<\/h2>\n\n\n\n
A\u00e7o ferramenta de alta qualidade<\/td>Dureza<\/td>Recurso principal<\/td>Vantagem prim\u00e1ria<\/td><\/tr>
AISI M42<\/td>68\u201370 HRC<\/td>Alto Co (~8%)<\/td>Mant\u00e9m a dureza em altas temperaturas de corte.<\/td><\/tr>
AISI T15<\/td>At\u00e9 67 HRC<\/td>Alto V + Co<\/td>Alta resist\u00eancia ao desgaste abrasivo<\/td><\/tr>
AISI M4<\/td>62\u201364 HRC<\/td>Conte\u00fado V equilibrado<\/td>Maior resist\u00eancia com boa resist\u00eancia ao desgaste<\/td><\/tr>
A\u00e7os P\/M<\/td>67\u201369 HRC<\/td>Microestrutura uniforme<\/td>Desempenho est\u00e1vel em condi\u00e7\u00f5es combinadas<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"

Selection of Tool Steel for High-Speed Cutting (HSC) High-speed cutting (HSC) operates at very high cutting speeds and material removal rates, generating extreme strain rates and temperatures at the tool\u2013workpiece interface. Plastic deformation produces shear strains of 2\u20135 and strain rates up to 105\u2009s\u22121 (locally reaching 107\u2009s\u22121), with interface temperatures often exceeding 1000\u2103. At these […]<\/p>\n","protected":false},"author":1,"featured_media":4843,"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":"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":""},"class_list":["post-11470","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"\nHigh-Speed Steel (HSS) Selection Guide for Cutting Tools | Aobo Steel<\/title>\n<meta name=\"description\" content=\"Learn how to select tool steel for high-speed cutting (HSC). 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