{"id":11476,"date":"2025-12-20T10:14:31","date_gmt":"2025-12-20T02:14:31","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=11476"},"modified":"2026-04-01T12:06:52","modified_gmt":"2026-04-01T04:06:52","slug":"selection-of-tool-steel-for-rolling-mill-rolls","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/selection-of-tool-steel-for-rolling-mill-rolls\/","title":{"rendered":"Sele\u00e7\u00e3o de a\u00e7o ferramenta para cilindros de lamina\u00e7\u00e3o | D2, A2, M4"},"content":{"rendered":"
\n

Sele\u00e7\u00e3o de a\u00e7o ferramenta para cilindros de lamina\u00e7\u00e3o<\/h1>\n\n\n\n

Os cilindros de lamina\u00e7\u00e3o operam sob severas tens\u00f5es de compress\u00e3o, contato superficial repetido e, na lamina\u00e7\u00e3o a quente, fortes ciclos t\u00e9rmicos. Portanto, a sele\u00e7\u00e3o do a\u00e7o ferramenta deve come\u00e7ar com o modo de falha predominante em servi\u00e7o, e n\u00e3o apenas com a dureza.<\/p>\n\n\n\n

Na pr\u00e1tica, os cilindros de lamina\u00e7\u00e3o geralmente falham de tr\u00eas maneiras. A primeira \u00e9 o desgaste abrasivo, onde o atrito cont\u00ednuo e a camada de carepa removem gradualmente o material da superf\u00edcie. A segunda \u00e9 a fadiga por contato de lamina\u00e7\u00e3o, onde a tens\u00e3o repetida na subsuperf\u00edcie leva ao in\u00edcio de trincas e ao lascamento. A terceira \u00e9 a fissura\u00e7\u00e3o t\u00e9rmica na lamina\u00e7\u00e3o a quente, onde o aquecimento e o resfriamento repetidos produzem fissuras t\u00e9rmicas e aceleram os danos \u00e0 superf\u00edcie. A classe de a\u00e7o correta depende de qual desses mecanismos controla a vida \u00fatil do cilindro.<\/p>\n\n\n\n

Para aplica\u00e7\u00f5es de lamina\u00e7\u00e3o a frio, a resist\u00eancia ao desgaste e \u00e0 fadiga por contato s\u00e3o os principais crit\u00e9rios de sele\u00e7\u00e3o. Alta dureza melhora a resist\u00eancia \u00e0 abras\u00e3o e \u00e0 deforma\u00e7\u00e3o superficial, mas fragilidade excessiva aumenta o risco de fissuras e lascamento sob carga c\u00edclica. Para aplica\u00e7\u00f5es de lamina\u00e7\u00e3o a quente, a prioridade passa a ser a dureza a quente e a resist\u00eancia \u00e0 fadiga t\u00e9rmica. Um material com bom desempenho em condi\u00e7\u00f5es de desgaste a frio ainda pode falhar rapidamente se n\u00e3o suportar choques t\u00e9rmicos repetidos.<\/p>\n\n\n\n

L\u00f3gica de sele\u00e7\u00e3o para cilindros de lamina\u00e7\u00e3o<\/h2>\n\n\n\n

Se o principal problema for o desgaste superficial constante na lamina\u00e7\u00e3o a frio, um a\u00e7o para trabalho a frio com alta resist\u00eancia ao desgaste geralmente \u00e9 a escolha certa.<\/p>\n\n\n\n

Se o rolo estiver apresentando falhas por lascamento, rachaduras ou desprendimento de part\u00edculas, a tenacidade torna-se mais importante do que a m\u00e1xima resist\u00eancia \u00e0 abras\u00e3o.<\/p>\n\n\n\n

Se a aplica\u00e7\u00e3o envolver aquecimento e resfriamento repetidos, \u00e9 necess\u00e1rio um a\u00e7o para trabalho a quente com resist\u00eancia a fissuras t\u00e9rmicas.<\/p>\n\n\n\n

Esta \u00e9 a base pr\u00e1tica para a sele\u00e7\u00e3o de notas.<\/p>\n\n\n\n

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

A\u00e7o ferramenta AISI D2 |1.2379 | SKD11<\/h3>\n\n\n\n

O a\u00e7o D2 \u00e9 adequado para condi\u00e7\u00f5es de lamina\u00e7\u00e3o a frio onde a resist\u00eancia ao desgaste \u00e9 o principal requisito. Sua composi\u00e7\u00e3o rica em carbono e cromo proporciona forte resist\u00eancia \u00e0 abras\u00e3o e boa resist\u00eancia \u00e0 deforma\u00e7\u00e3o pl\u00e1stica sob cargas compressivas elevadas. Isso o torna uma escolha pr\u00e1tica para cilindros de lamina\u00e7\u00e3o a frio que devem manter a integridade da superf\u00edcie por longos per\u00edodos.<\/p>\n\n\n\n

A dureza t\u00edpica em condi\u00e7\u00f5es de trabalho \u00e9 de 58 a 62 HRC.<\/p>\n\n\n\n

O a\u00e7o D2 n\u00e3o deve ser a op\u00e7\u00e3o preferencial em situa\u00e7\u00f5es onde a falha por lamina\u00e7\u00e3o \u00e9 predominantemente causada por trincas ou lascamento. Seu alto teor de carbonetos melhora a resist\u00eancia ao desgaste, mas reduz a tenacidade em compara\u00e7\u00e3o com a\u00e7os de menor liga para trabalho a frio.<\/p>\n\n\n\n

\n
Enviar consulta agora<\/a><\/div>\n\n\n\n
Veja os detalhes de fornecimento de materiais D2<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n
\n

A\u00e7o ferramenta AISI A2 | 1.2363 | SKD12<\/h3>\n\n\n\n

A2 \u00e9 uma escolha melhor quando o cilindro exige uma combina\u00e7\u00e3o mais equilibrada de resist\u00eancia ao desgaste e tenacidade. Comparado com D2, oferece menor resist\u00eancia \u00e0 abras\u00e3o, mas melhor resist\u00eancia \u00e0 propaga\u00e7\u00e3o de trincas sob tens\u00e3o c\u00edclica.<\/p>\n\n\n\n

A dureza de trabalho t\u00edpica tamb\u00e9m \u00e9 de 58 a 62 HRC.<\/p>\n\n\n\n

O a\u00e7o A2 \u00e9 mais adequado que o D2 para aplica\u00e7\u00f5es de lamina\u00e7\u00e3o a frio onde a quebra dos cilindros, danos nas bordas ou falhas por fadiga j\u00e1 representam uma preocupa\u00e7\u00e3o. N\u00e3o \u00e9 a primeira op\u00e7\u00e3o quando a m\u00e1xima resist\u00eancia ao desgaste \u00e9 a \u00fanica prioridade.<\/p>\n\n\n\n

\n
Enviar consulta agora<\/a><\/div>\n\n\n\n
Veja os detalhes de fornecimento de material A2.<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n
\n

AISI M4<\/h3>\n\n\n\n

O a\u00e7o M4 \u00e9 utilizado em servi\u00e7os de lamina\u00e7\u00e3o a frio extremamente severos, onde s\u00e3o necess\u00e1rias alta dureza, alta resist\u00eancia \u00e0 compress\u00e3o e forte resist\u00eancia ao desgaste. \u00c9 particularmente adequado para condi\u00e7\u00f5es exigentes de cilindros de trabalho, como as encontradas nos laminadores Sendzimir.<\/p>\n\n\n\n

A dureza t\u00edpica em condi\u00e7\u00f5es de trabalho \u00e9 de 62 a 65 HRC.<\/p>\n\n\n\n

Quando produzido por metalurgia do p\u00f3, o a\u00e7o M4 apresenta uma distribui\u00e7\u00e3o de carbonetos mais fina e uniforme, melhorando assim a tenacidade em compara\u00e7\u00e3o com os m\u00e9todos convencionais de produ\u00e7\u00e3o de a\u00e7o r\u00e1pido. Isso o torna mais eficaz na resist\u00eancia ao desgaste abrasivo e \u00e0 fadiga por contato de rolamento sob severas condi\u00e7\u00f5es de lamina\u00e7\u00e3o a frio.<\/p>\n<\/div>\n\n\n\n

Resumo da Sele\u00e7\u00e3o Pr\u00e1tica de Materiais<\/h2>\n\n\n\n

Para cilindros de lamina\u00e7\u00e3o a frio expostos principalmente ao desgaste abrasivo, o D2 \u00e9 uma escolha pr\u00e1tica e focada na resist\u00eancia ao desgaste.<\/p>\n\n\n\n

Para cilindros de lamina\u00e7\u00e3o a frio com maior risco de fissuras ou lascamento, o A2 oferece um equil\u00edbrio mais seguro e focado na resist\u00eancia.<\/p>\n\n\n\n

Para servi\u00e7os de lamina\u00e7\u00e3o a frio muito severos, com altas exig\u00eancias de dureza, resist\u00eancia \u00e0 compress\u00e3o e resist\u00eancia \u00e0 fadiga, o M4 \u00e9 a op\u00e7\u00e3o mais resistente.<\/p>\n\n\n\n

Para cilindros de lamina\u00e7\u00e3o a quente expostos a ciclos t\u00e9rmicos repetidos, a dire\u00e7\u00e3o H26 \u00e9 a mais adequada, pois a sele\u00e7\u00e3o n\u00e3o se limita mais ao desgaste, mas tamb\u00e9m inclui a resist\u00eancia ao trincamento t\u00e9rmico e a manuten\u00e7\u00e3o da resist\u00eancia em altas temperaturas.<\/p>\n\n\n\n

Conclus\u00e3o<\/h2>\n\n\n\n

A sele\u00e7\u00e3o do a\u00e7o ferramenta para cilindros de lamina\u00e7\u00e3o deve ser baseada no padr\u00e3o de falhas observado em servi\u00e7o. D2, A2 e M4 s\u00e3o relevantes para lamina\u00e7\u00e3o a frio, mas priorizam a resist\u00eancia ao desgaste e a tenacidade de maneiras diferentes. O H26 segue uma l\u00f3gica de sele\u00e7\u00e3o distinta, na qual a dureza a quente e a resist\u00eancia \u00e0 fadiga t\u00e9rmica determinam o desempenho. O a\u00e7o correto \u00e9 aquele que melhor se adequa ao mecanismo de dano predominante, e n\u00e3o simplesmente aquele com a maior dureza.<\/p>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"

Selection of Tool Steel for Rolling Mill Rolls Rolling mill rolls operate under severe compressive stress, repeated surface contact, and, in hot rolling, strong thermal cycling. Tool steel selection should therefore begin with the dominant failure mode in service rather than with hardness alone. In practice, rolling mill rolls usually fail in one of three […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"content-type":"landing-page","_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"full-width-container","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-11476","page","type-page","status-publish","hentry"],"yoast_head":"\nSelection of Tool Steel for Rolling Mill Rolls | D2, A2, M4 | AoboSteel<\/title>\n<meta name=\"description\" content=\"Learn how to select tool steel for rolling mill rolls based on wear, spalling, and thermal fatigue. Compare D2, A2, and M4 for cold- and hot-rolling applications.\" \/>\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-rolling-mill-rolls\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Selection of Tool Steel for Rolling Mill Rolls | D2, A2, M4\" \/>\n<meta property=\"og:description\" content=\"Learn how to select tool steel for rolling mill rolls based on wear, spalling, and thermal fatigue. 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