{"id":6409,"date":"2020-09-22T05:49:59","date_gmt":"2020-09-22T05:49:59","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=6409"},"modified":"2025-07-01T06:28:49","modified_gmt":"2025-07-01T06:28:49","slug":"90-anos-de-historia-de-desenvolvimento-do-aco-inoxidavel-duplex","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/pt\/blog\/90-anos-de-historia-de-desenvolvimento-do-aco-inoxidavel-duplex\/","title":{"rendered":"90 anos de hist\u00f3ria de desenvolvimento de a\u00e7o inoxid\u00e1vel duplex"},"content":{"rendered":"<h2 class=\"wp-block-heading\"><strong>Setembro de 2020 \u00e9 o 90\u00ba anivers\u00e1rio da hist\u00f3ria do a\u00e7o inoxid\u00e1vel duplex<\/strong><\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"545\" height=\"453\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/09\/Avesta-Ironworks-in-1930-located-in-Avesta-Sweden.jpg\" alt=\"Avesta Ironworks em 1930, localizada em Avesta, Su\u00e9cia, History Of Duplex Stainless Steel\" class=\"wp-image-6410\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/09\/Avesta-Ironworks-in-1930-located-in-Avesta-Sweden.jpg 545w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/09\/Avesta-Ironworks-in-1930-located-in-Avesta-Sweden-300x249.jpg 300w\" sizes=\"(max-width: 545px) 100vw, 545px\" \/><figcaption class=\"wp-element-caption\">Avesta Ironworks em 1930, localizada em Avesta, Su\u00e9cia<\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\"><strong>1930 a 1970<\/strong><\/h3>\n\n\n\n<p>No in\u00edcio do s\u00e9culo XIX, na hist\u00f3ria do a\u00e7o inoxid\u00e1vel duplex, os primeiros a\u00e7os inoxid\u00e1veis eram austenita pura, ferrite ou martensita. Em 1930, a Avesta Ironworks da Su\u00e9cia desenvolveu o primeiro a\u00e7o inoxid\u00e1vel duplex com uma combina\u00e7\u00e3o de ferrite e austenita.<\/p>\n\n\n\n<p>Nos primeiros dias, o a\u00e7o de fase dupla era usado para fundi\u00e7\u00f5es, barras e placas para polpa\u00e7\u00e3o, fabrica\u00e7\u00e3o de papel e aplica\u00e7\u00f5es de alta temperatura devido \u00e0 sua boa resist\u00eancia \u00e0 corros\u00e3o e fundibilidade. Em 1932, o a\u00e7o duplex representava 6,5% do mercado global de a\u00e7o inoxid\u00e1vel de 5.500 toneladas.<\/p>\n\n\n\n<p>Nas d\u00e9cadas seguintes, os metal\u00fargicos desenvolveram t\u00e9cnicas para reduzir o teor de carbono e introduzir nitrog\u00eanio para controlar a plasticidade e a soldabilidade. As melhorias na d\u00e9cada de 1950 inclu\u00edram o desenvolvimento de tipos de a\u00e7o duplex com adi\u00e7\u00e3o de nitrog\u00eanio para reduzir o risco de rachaduras durante a fundi\u00e7\u00e3o e soldagem.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>A\u00e7o inoxid\u00e1vel duplex de segunda gera\u00e7\u00e3o<\/strong><\/h3>\n\n\n\n<p>O desenvolvimento do a\u00e7o duplex atingiu seu auge na d\u00e9cada de 1970. O a\u00e7o inoxid\u00e1vel duplex de segunda gera\u00e7\u00e3o tem melhor resist\u00eancia a <a href=\"https:\/\/www.kaysuns.com\/pt\/perigo-oculto-da-corrosao-intergranular\/\" target=\"_blank\">corros\u00e3o intergranular<\/a>e obteve mais aplica\u00e7\u00f5es e maior sucesso comercial.<\/p>\n\n\n\n<p>Do ponto de vista metal\u00fargico, esses tipos de a\u00e7o utilizam nitrog\u00eanio aumentado para aumentar a forma\u00e7\u00e3o de austenita. Isso pode evitar que a estrutura duplex se reduza a ferrita total na zona afetada pelo calor ap\u00f3s a soldagem ou trabalho a quente. O nitrog\u00eanio tamb\u00e9m ajuda o a\u00e7o a resistir \u00e0 corros\u00e3o por pite e, ao mesmo tempo, aumenta a resist\u00eancia.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">3\u00aa: <strong>Super Duplex<\/strong><\/h3>\n\n\n\n<p>O desenvolvimento nas d\u00e9cadas de 1970 e 1980 foi principalmente a terceira gera\u00e7\u00e3o de a\u00e7os duplex: Forta SDX 2507, Forta SDX 100, os a\u00e7os inoxid\u00e1veis super duplex de alta liga. Essas classes cont\u00eam mais elementos de liga e, portanto, t\u00eam melhor desempenho, mas a um custo mais alto. O a\u00e7o inoxid\u00e1vel super duplex atende \u00e0s necessidades das ind\u00fastrias offshore de petr\u00f3leo, g\u00e1s, alimentos e bebidas e qu\u00edmica.<\/p>\n\n\n\n<p>A defini\u00e7\u00e3o mais comum de a\u00e7o inoxid\u00e1vel super duplex \u00e9 que sua resist\u00eancia \u00e0 corros\u00e3o por pite (PRE ou PREN) deve atingir pelo menos 40. Para atingir esse n\u00edvel de resist\u00eancia \u00e0 corros\u00e3o, os metal\u00fargicos usam elementos de liga como o cromo, <a href=\"https:\/\/www.kaysuns.com\/pt\/papel-do-molibdenio-em-tubos-e-conexoes-de-aco-inoxidavel\/\" target=\"_blank\">molibd\u00eanio<\/a>tungst\u00eanio, n\u00edquel e cobre. \u00c9 claro que mais elementos de liga nos a\u00e7os superd\u00faplex tamb\u00e9m significam custos mais altos, mas, em compara\u00e7\u00e3o com os a\u00e7os austen\u00edticos, eles geralmente s\u00e3o mais competitivos em termos de pre\u00e7o e podem ser considerados substitutos dos a\u00e7os austen\u00edticos.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>A\u00e7o Duplex de Baixa Liga (Lean Duplex)<\/strong><\/h3>\n\n\n\n<p>Na outra ponta da linha de produtos de a\u00e7o duplex, a planta da Avesta desenvolveu a\u00e7o inoxid\u00e1vel duplex de baixa liga (Lean Duplex) em meados da d\u00e9cada de 1980 para minimizar os custos de mat\u00e9ria-prima.<\/p>\n\n\n\n<p>Isso \u00e9 especialmente verdadeiro quando o n\u00edquel \u00e9 usado como elemento de liga. Ao longo dos anos, o pre\u00e7o do n\u00edquel oscilou fortemente. Portanto, ao reduzir o teor de n\u00edquel, o <a href=\"https:\/\/www.kaysuns.com\/pt\/\" target=\"_blank\">fornecedor de acess\u00f3rios para tubos de a\u00e7o inoxid\u00e1vel<\/a> pode fornecer aos clientes produtos de a\u00e7o inoxid\u00e1vel mais est\u00e1veis.<\/p>\n\n\n\n<p>Entre esses Lean Duplex, Forta LDX 2101 \u00e9 especialmente popular. Possui mais mangan\u00eas e nitrog\u00eanio para compensar seu menor teor de n\u00edquel. Possui alta resist\u00eancia, boa resist\u00eancia \u00e0 corros\u00e3o e desempenho de soldagem.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Duplex format\u00e1vel<\/strong><\/h3>\n\n\n\n<p>Nos \u00faltimos 10-15 anos, o a\u00e7o duplex com propriedades de moldagem aprimoradas foi desenvolvido. O surgimento do Formble Duplex Forta FDX 27 resolve o problema de que outros a\u00e7os duplex n\u00e3o podem ter ductilidade e alta resist\u00eancia ao mesmo tempo, e n\u00e3o podem produzir pe\u00e7as moldadas complexas e leves.<\/p>","protected":false},"featured_media":6410,"template":"","categories":[186],"tags":[],"class_list":["post-6409","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>History Of Duplex Stainless Steel Has Been 90 Years - KAYSUNS PIPES<\/title>\n<meta name=\"description\" content=\"During 90 years history of duplex stainless steel, there have been 4 generations of duplex products, such as super duplex, lean duplex.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.kaysuns.com\/pt\/blog\/90-anos-de-historia-de-desenvolvimento-do-aco-inoxidavel-duplex\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"History Of Duplex Stainless Steel Has Been 90 Years - 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