{"id":11813,"date":"2025-12-31T10:29:11","date_gmt":"2025-12-31T02:29:11","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=11813"},"modified":"2026-04-01T15:38:51","modified_gmt":"2026-04-01T07:38:51","slug":"selection-of-tool-steel-for-tube-pipe-mill-rolls","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/selection-of-tool-steel-for-tube-pipe-mill-rolls\/","title":{"rendered":"Sele\u00e7\u00e3o de a\u00e7o ferramenta para cilindros de lamina\u00e7\u00e3o de tubos e canos | D2, A2, H13"},"content":{"rendered":"
\n

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

Os cilindros de lamina\u00e7\u00e3o s\u00e3o usados para perfurar, reduzir, moldar e dimensionar tubos sem costura ou soldados sob carga mec\u00e2nica combinada e, na lamina\u00e7\u00e3o a quente, ciclos t\u00e9rmicos severos.<\/p>\n\n\n\n

Na lamina\u00e7\u00e3o a quente, as temperaturas superficiais podem atingir 650\u2013700 \u00b0C, gerando gradientes t\u00e9rmicos acentuados que levam ao surgimento de fissuras t\u00e9rmicas e trincas superficiais. Ao mesmo tempo, os cilindros s\u00e3o submetidos a altas tens\u00f5es de contato hertzianas, cisalhamento subsuperficial c\u00edclico e atrito cont\u00ednuo. Como resultado, os modos de falha predominantes s\u00e3o fadiga superficial, lascamento e desgaste abrasivo.<\/p>\n\n\n\n

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

A sele\u00e7\u00e3o do a\u00e7o ferramenta deve ser baseada no mecanismo de falha predominante na posi\u00e7\u00e3o de lamina\u00e7\u00e3o.<\/p>\n\n\n\n

Resist\u00eancia ao desgaste versus tenacidade<\/h3>\n\n\n\n


\u00c9 necess\u00e1ria alta dureza para resistir ao desgaste abrasivo e \u00e0 deforma\u00e7\u00e3o pl\u00e1stica sob press\u00e3o de contato. No entanto, o aumento da dureza e do teor de carbonetos reduz a tenacidade, aumentando assim o risco de lascamento e fratura fr\u00e1gil sob carregamento c\u00edclico. Em muitas aplica\u00e7\u00f5es de lamina\u00e7\u00e3o, a falha dos cilindros \u00e9 causada com mais frequ\u00eancia por tenacidade insuficiente do que por desgaste.<\/p>\n\n\n\n

Fadiga T\u00e9rmica e Endurecimento a Quente<\/h3>\n\n\n\n


Na lamina\u00e7\u00e3o a quente, o aquecimento e o resfriamento repetidos causam fadiga t\u00e9rmica, levando ao surgimento de fissuras e \u00e0 propaga\u00e7\u00e3o de trincas. O material deve resistir ao in\u00edcio de trincas, mantendo dureza a quente suficiente para evitar o amolecimento e a deforma\u00e7\u00e3o da superf\u00edcie. Se a dureza a quente for insuficiente, a superf\u00edcie do cilindro se deforma; se a resist\u00eancia \u00e0 fadiga t\u00e9rmica for inadequada, ocorrem trincas e falhas prematuras.<\/p>\n\n\n\n

Graus de a\u00e7o ferramenta recomendados<\/h2>\n\n\n\n
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A\u00e7o ferramenta AISI D2 |1.2379 | SKD11<\/h3>\n\n\n\n

O a\u00e7o D2 \u00e9 adequado para lamina\u00e7\u00e3o a frio e trefila\u00e7\u00e3o de tubos, onde o desgaste abrasivo \u00e9 a principal preocupa\u00e7\u00e3o e os efeitos t\u00e9rmicos s\u00e3o m\u00ednimos. Seu alto teor de carboneto de cromo proporciona forte resist\u00eancia ao desgaste superficial e \u00e0 perda dimensional. Sob carga est\u00e1vel, oferece vida \u00fatil significativamente maior do que a\u00e7os de liga inferior. No entanto, devido \u00e0 sua tenacidade limitada, n\u00e3o \u00e9 adequado para aplica\u00e7\u00f5es com cargas de impacto, desalinhamento ou condi\u00e7\u00f5es operacionais inst\u00e1veis.<\/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
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A\u00e7o ferramenta AISI A2 | 1.2363 | SKD12<\/h3>\n\n\n\n

O a\u00e7o A2 \u00e9 utilizado quando o risco de lascamento ou fissura\u00e7\u00e3o supera o do desgaste puramente abrasivo. Ele oferece maior tenacidade e resist\u00eancia \u00e0 propaga\u00e7\u00e3o de fissuras do que o a\u00e7o D2, mantendo ao mesmo tempo dureza adequada para cilindros de trabalho a frio. \u00c9 comumente aplicado em fun\u00e7\u00f5es de apoio ou em posi\u00e7\u00f5es com cargas vari\u00e1veis. A desvantagem \u00e9 a menor resist\u00eancia ao desgaste em compara\u00e7\u00e3o com o a\u00e7o D2.<\/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
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Fornecedor de a\u00e7o ferramenta H13 | 1.2344 | SKD61<\/h3>\n\n\n\n

O a\u00e7o H13 \u00e9 a escolha preferencial para aplica\u00e7\u00f5es de lamina\u00e7\u00e3o a quente e perfura\u00e7\u00e3o onde a fadiga t\u00e9rmica \u00e9 predominante. Ele resiste \u00e0 fissura\u00e7\u00e3o t\u00e9rmica e mant\u00e9m a estabilidade estrutural sob ciclos t\u00e9rmicos repetidos. Normalmente, \u00e9 utilizado em n\u00edveis de dureza mais baixos para preservar a tenacidade, garantindo resist\u00eancia \u00e0 fissura\u00e7\u00e3o sob cargas t\u00e9rmicas e mec\u00e2nicas combinadas.<\/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

Resumo das propriedades do a\u00e7o ferramenta<\/h2>\n\n\n\n
Grau<\/td>Dureza (HRC)<\/td>Vantagem prim\u00e1ria<\/td>Aplica\u00e7\u00e3o t\u00edpica<\/td><\/tr>
AISI D2<\/td>58\u201362<\/td>Alta resist\u00eancia \u00e0 abras\u00e3o<\/td>Lamina\u00e7\u00e3o a frio, rolos de trefila\u00e7\u00e3o de tubos<\/td><\/tr>
AISI A2<\/td>58\u201362<\/td>Maior resist\u00eancia e durabilidade<\/td>Rolos de apoio, zonas de carga inst\u00e1veis<\/td><\/tr>
AISI H13<\/td>42\u201350<\/td>Resist\u00eancia \u00e0 fadiga t\u00e9rmica (fissura\u00e7\u00e3o por calor)<\/td>Perfura\u00e7\u00e3o a quente, rolos de enrolamento a quente<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"

Selection of Tool Steel for Tube & Pipe Mill Rolls Mill rolls are used to pierce, reduce, shape, and size seamless or welded tubes under combined mechanical loading and, in hot rolling, severe thermal cycling. In hot rolling, surface temperatures can reach 650\u2013700 \u00b0C, generating steep thermal gradients that lead to heat checking and surface […]<\/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-11813","page","type-page","status-publish","hentry"],"yoast_head":"\nSelection of Tool Steel for Tube & Pipe Mill Rolls | D2, A2, H13 | AoboSteel<\/title>\n<meta name=\"description\" content=\"Select the right tool steel for tube and pipe mill rolls based on wear, toughness, and thermal fatigue. 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