{"id":6222,"date":"2020-07-14T06:36:12","date_gmt":"2020-07-14T06:36:12","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=6222"},"modified":"2025-07-01T06:30:44","modified_gmt":"2025-07-01T06:30:44","slug":"um-breve-historico-do-desenvolvimento-do-aco-inoxidavel-duplex","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/pt\/blog\/a-brief-history-of-the-development-of-duplex-stainless-steel\/","title":{"rendered":"Uma breve hist\u00f3ria do desenvolvimento do a\u00e7o inoxid\u00e1vel duplex"},"content":{"rendered":"<h2 class=\"wp-block-heading\"><strong>Houve tr\u00eas gera\u00e7\u00f5es de a\u00e7o inoxid\u00e1vel duplex<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O desenvolvimento do a\u00e7o inoxid\u00e1vel duplex tem uma hist\u00f3ria de quase 90 anos, e a fase de ferrita e a fase austenita respondem, cada uma, por 50% da estrutura de a\u00e7o inoxid\u00e1vel duplex.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O desenvolvimento dos a\u00e7os inoxid\u00e1veis duplex come\u00e7ou na d\u00e9cada de 1930, na \u00e9poca para resolver o problema de <a href=\"https:\/\/www.kaysuns.com\/pt\/perigo-oculto-da-corrosao-intergranular\/\" target=\"_blank\">corros\u00e3o intergranular<\/a> de a\u00e7os inoxid\u00e1veis austen\u00edticos com alto teor de carbono.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"527\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2019\/06\/duplex-stainless-steel-2205.jpg\" alt=\"barra de a\u00e7o inoxid\u00e1vel duplex 2205\" class=\"wp-image-5056\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2019\/06\/duplex-stainless-steel-2205.jpg 800w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2019\/06\/duplex-stainless-steel-2205-300x198.jpg 300w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2019\/06\/duplex-stainless-steel-2205-768x506.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">a\u00e7o inoxid\u00e1vel duplex 2205<\/figcaption><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\"><strong>O a\u00e7o inoxid\u00e1vel duplex tem 3 gera\u00e7\u00f5es agora:<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A primeira gera\u00e7\u00e3o<\/strong>: representado pelo a\u00e7o inoxid\u00e1vel Tipo 329 desenvolvido nos Estados Unidos na d\u00e9cada de 1940, \u00e9 amplamente utilizado em tubos de trocadores de calor de f\u00e1bricas de \u00e1cido n\u00edtrico.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Em meados da d\u00e9cada de 1960, a Su\u00e9cia desenvolveu o a\u00e7o inoxid\u00e1vel duplex 3RE60 (00Cr18Ni5Mo3N) projetado para melhorar a resist\u00eancia \u00e0 fratura por corros\u00e3o do cloreto, mas devido ao seu alto teor de carbono, \u00e9 geralmente usado para fundi\u00e7\u00e3o e forjados.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Segunda gera\u00e7\u00e3o<\/strong>: Desde a d\u00e9cada de 1970, com a populariza\u00e7\u00e3o e o desenvolvimento da tecnologia de refino secund\u00e1rio (AOD), tecnologia de refino a v\u00e1cuo (VOD) e tecnologia de fundi\u00e7\u00e3o cont\u00ednua, a produ\u00e7\u00e3o de a\u00e7o de carbono ultrabaixo (w (C) \u22640.03%) tem F\u00e1cil de realizar , 00Cr22Ni5Mo3N \u00e9 o representante do a\u00e7o inoxid\u00e1vel duplex de segunda gera\u00e7\u00e3o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O grau de a\u00e7o foi desenvolvido com sucesso pela Su\u00e9cia na d\u00e9cada de 1970, com grau de material <a href=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2019\/07\/DUPLEX-STAINLESS-STEEL-2205.pdf\" target=\"_blank\">SAF2205<\/a>, e o grau correspondente nos EUA \u00e9 UNS S31803.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A terceira gera\u00e7\u00e3o<\/strong>n: No final da d\u00e9cada de 1980, o a\u00e7o inoxid\u00e1vel duplex de terceira gera\u00e7\u00e3o foi desenvolvido com sucesso, e as principais marcas s\u00e3o <a href=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2019\/07\/SUPER-DUPLEX-STEEL-2507.pdf\" target=\"_blank\">SAF2507<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ele \u00e9 caracterizado por um carbono ultrabaixo, alto <a href=\"https:\/\/www.kaysuns.com\/pt\/papel-do-molibdenio-em-tubos-e-conexoes-de-aco-inoxidavel\/\" target=\"_blank\">molibd\u00eanio<\/a>e alto nitrog\u00eanio, tem excelente resist\u00eancia \u00e0 corros\u00e3o, e seu <a href=\"https:\/\/www.kaysuns.com\/pt\/o-que-e-pren\/\" target=\"_blank\">PREN<\/a> o valor \u00e9 maior que 40.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>No s\u00e9culo 21, o a\u00e7o inoxid\u00e1vel duplex tem duas dire\u00e7\u00f5es principais:<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Super Grade<\/strong>: por um lado, aumentar ainda mais o teor de elementos de liga no a\u00e7o para obter maior resist\u00eancia e melhor resist\u00eancia \u00e0 corros\u00e3o, como SAF 2707 e SAF 3207 recentemente desenvolvidos pela empresa sueca SANDVIK. O valor PRE \u00e9 maior que 45, que \u00e9 chamado de a\u00e7o inoxid\u00e1vel super duplex (geralmente expresso em HD).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Grau Econ\u00f4mico<\/strong>: Por outro lado, nos voltamos para o desenvolvimento de a\u00e7o inoxid\u00e1vel duplex econ\u00f4mico com baixo teor de n\u00edquel e sem molibd\u00eanio ou apenas uma pequena quantidade de molibd\u00eanio para reduzir o custo e o pre\u00e7o de venda do a\u00e7o inoxid\u00e1vel duplex e melhorar significativamente a trabalhabilidade a quente e soldagem de a\u00e7o inoxid\u00e1vel duplex Para aumentar a vantagem competitiva do a\u00e7o inoxid\u00e1vel duplex e outros tipos de a\u00e7o inoxid\u00e1vel.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"713\" height=\"558\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/devolopment-and-grades-of-duplex-stainless-steel.jpg\" alt=\"desenvolvimento e graus de a\u00e7o inoxid\u00e1vel duplex\" class=\"wp-image-6224\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/devolopment-and-grades-of-duplex-stainless-steel.jpg 713w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/devolopment-and-grades-of-duplex-stainless-steel-300x235.jpg 300w\" sizes=\"(max-width: 713px) 100vw, 713px\" \/><\/figure>\n<\/div>\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"702\" height=\"673\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/grades-of-duplex-stainless-steels.jpg\" alt=\"classes de a\u00e7os inoxid\u00e1veis duplex\" class=\"wp-image-6226\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/grades-of-duplex-stainless-steels.jpg 702w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/07\/grades-of-duplex-stainless-steels-300x288.jpg 300w\" sizes=\"(max-width: 702px) 100vw, 702px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A produ\u00e7\u00e3o de a\u00e7o inoxid\u00e1vel duplex na China aumentou de menos de 1.000 toneladas em 2001 para 180.000 toneladas em 2019. <a href=\"https:\/\/www.kaysuns.com\/pt\/\" target=\"_blank\">Fornecedor de acess\u00f3rios para tubos de a\u00e7o inoxid\u00e1vel duplex<\/a> tamb\u00e9m est\u00e1 aumentando em especifica\u00e7\u00f5es completas e modelos de placas de a\u00e7o inoxid\u00e1vel duplex, tubos, perfis e a\u00e7o redondo.<\/p>","protected":false},"featured_media":5255,"template":"","categories":[186],"tags":[],"class_list":["post-6222","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - 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