{"id":7510,"date":"2024-06-21T15:50:08","date_gmt":"2024-06-21T07:50:08","guid":{"rendered":"https:\/\/am-material.com\/?page_id=7510"},"modified":"2024-06-21T16:06:50","modified_gmt":"2024-06-21T08:06:50","slug":"duplex-stainless-steel-powder-2205-2507-2707","status":"publish","type":"page","link":"https:\/\/am-material.com\/pt\/duplex-stainless-steel-powder-2205-2507-2707\/","title":{"rendered":"P\u00f3 de a\u00e7o inoxid\u00e1vel duplex 2205 2507 2707"},"content":{"rendered":"
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P\u00f3 de a\u00e7o inoxid\u00e1vel duplex 2205, 2507 e 2707<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Com o r\u00e1pido desenvolvimento da tecnologia de manufatura aditiva representada pela impress\u00e3o 3D, o a\u00e7o inoxid\u00e1vel super duplex come\u00e7ou a ser aplicado em v\u00e1rios campos, como marinha, qu\u00edmica e petr\u00f3leo. A composi\u00e7\u00e3o qu\u00edmica precisa e control\u00e1vel do p\u00f3 de a\u00e7o inoxid\u00e1vel duplex \u00e9 a base e a dificuldade da prepara\u00e7\u00e3o desse tipo de p\u00f3. Do ponto de vista da pr\u00e1tica de produ\u00e7\u00e3o, este documento analisa detalhadamente como romper as principais tecnologias para obter uma produ\u00e7\u00e3o em massa est\u00e1vel.<\/p>

O a\u00e7o inoxid\u00e1vel duplex (DSS) \u00e9 um material met\u00e1lico estrutural multif\u00e1sico que consiste em uma fra\u00e7\u00e3o de volume compar\u00e1vel de ferrita (\u03b1) e austenita (\u03b3). Ele integra as vantagens do a\u00e7o inoxid\u00e1vel ferr\u00edtico e do a\u00e7o inoxid\u00e1vel austen\u00edtico, com excelente resist\u00eancia \u00e0 corros\u00e3o, alta resist\u00eancia e boa plasticidade.<\/p>

A Tabela 1 mostra a composi\u00e7\u00e3o qu\u00edmica dos a\u00e7os inoxid\u00e1veis duplex t\u00edpicos 2205, 2507 e 2707, e a Tabela 2 mostra as propriedades mec\u00e2nicas desses a\u00e7os inoxid\u00e1veis t\u00edpicos.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Grau<\/td>\nN\u00ba UNS<\/td>\nPT No.<\/td>\nC<\/td>\nCr<\/td>\nNi<\/td>\nMo<\/td>\nCu<\/td>\nN<\/td>\n<\/tr>\n
2205<\/td>\nS32205<\/span><\/td>\n1.4462<\/td>\n\u2264<\/span>0.03<\/span><\/td>\n22.0-23.0<\/span><\/td>\n4.5-6.5<\/span><\/td>\n3.0-3.5<\/span><\/td>\n–<\/td>\n0.14-0.20<\/span><\/td>\n<\/tr>\n
2507<\/td>\nS32507<\/span><\/td>\n1.441<\/td>\n\u22640.03<\/span><\/td>\n24.0-26.0<\/span><\/td>\n6.0-8.0<\/span><\/td>\n3.0-5.0<\/span><\/td>\n\u2264<\/span>0.<\/span>5<\/span><\/td>\n0.24-0.32<\/span><\/td>\n<\/tr>\n
2707<\/td>\nS32707<\/span><\/td>\n<\/td>\n\u22640.03<\/td>\n26.0-29.0<\/span><\/td>\n5.5-9.5<\/span><\/td>\n4.0-5.0<\/span><\/td>\n\u2264<\/span>1<\/span>.0<\/span><\/td>\n0.30-0.50<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Tabela 1 Composi\u00e7\u00e3o qu\u00edmica de 2205, 2507, 2707 (wt%)<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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<\/td>\nN\u00ba UNS<\/td>\nRp0.2\/Mpa(ksi)<\/td>\nRm\/Mpa (ksi)<\/td>\n\u03b4\/%<\/td>\nPT No.<\/td>\nRp0.2\/Mpa(ksi)<\/td>\nRm\/Mpa (ksi)<\/td>\n\u03b4\/%<\/td>\n<\/tr>\n
2205<\/td>\nS32205<\/td>\n450(65)<\/td>\n655(95)<\/td>\n25<\/td>\n1.4462<\/td>\n460(67)<\/td>\n640(93)<\/td>\n25<\/td>\n<\/tr>\n
2507<\/td>\nS32507<\/td>\n550(80)<\/td>\n795(116)<\/td>\n15<\/td>\n1.441<\/td>\n530(77)<\/td>\n730(106)<\/td>\n20<\/td>\n<\/tr>\n
2707<\/td>\nS32707<\/td>\n580(84)<\/td>\n850(124)<\/td>\n25<\/td>\n<\/td>\n570(83)<\/td>\n845(123)<\/td>\n25<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Tabela 2 Propriedades mec\u00e2nicas de 2205, 2507, 2707<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Entre eles, o a\u00e7o inoxid\u00e1vel super duplex 2507<\/strong> \u00e9 especialmente projetado para aplica\u00e7\u00f5es de engenharia naval, qu\u00edmica e de petr\u00f3leo, com excelente resist\u00eancia a pites, boa resist\u00eancia \u00e0 corros\u00e3o e altas propriedades mec\u00e2nicas em ambientes adversos, como os que cont\u00eam \u00e1cidos clorados.

A Figura 1 mostra a compara\u00e7\u00e3o da taxa de corros\u00e3o de a\u00e7os inoxid\u00e1veis duplex e austen\u00edticos em temperaturas de ebuli\u00e7\u00e3o em uma mistura de 50% de \u00e1cido ac\u00e9tico e diferentes quantidades de \u00e1cido f\u00f3rmico. A Figura 2 mostra uma compara\u00e7\u00e3o da resist\u00eancia \u00e0 corros\u00e3o por pite e em fendas de v\u00e1rios a\u00e7os inoxid\u00e1veis em recozimento de solu\u00e7\u00e3o s\u00f3lida, conforme medido pela ASTM G482 (6% FeCl3<\/sub>).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Com o crescente avan\u00e7o das quest\u00f5es de energia e prote\u00e7\u00e3o ambiental, o casco e a l\u00e2mina da turbina no equipamento de gera\u00e7\u00e3o de energia das mar\u00e9s, a v\u00e1lvula na usina de energia nuclear e o impulsor em alguns dispositivos de dessulfuriza\u00e7\u00e3o usam principalmente a\u00e7o inoxid\u00e1vel duplex fundido. Mas algumas pe\u00e7as fundidas de a\u00e7o inoxid\u00e1vel duplex com estrutura complexa s\u00e3o dif\u00edceis de fundir, o que limita seu desenvolvimento.<\/p>

Em compara\u00e7\u00e3o com os processos tradicionais de fundi\u00e7\u00e3o, a vantagem da impress\u00e3o 3D \u00e9 a capacidade de fabricar livremente pe\u00e7as complexas diretamente a partir de p\u00f3s, sem envolver m\u00e9todos tradicionais de fabrica\u00e7\u00e3o, como extrus\u00e3o, forjamento, fundi\u00e7\u00e3o e processamento secund\u00e1rio para obter a forma desejada, e as propriedades mec\u00e2nicas do material podem atender ou exceder o n\u00edvel de fundi\u00e7\u00e3o.<\/p>

Entende-se que a Truer Technology Co., Ltd. iniciou a pesquisa e o desenvolvimento de uma s\u00e9rie de p\u00f3 de a\u00e7o inoxid\u00e1vel duplex desde 2021. Esse tipo de a\u00e7o inoxid\u00e1vel duplex tem um alto teor de N e um intervalo de composi\u00e7\u00e3o estreito, e como controlar de forma precisa e est\u00e1vel o teor de N na liga tamb\u00e9m \u00e9 um desafio t\u00e9cnico.<\/p>

Com base nos c\u00e1lculos termodin\u00e2micos e cin\u00e9ticos da liga de N, a equipe de pesquisa de p\u00f3 de a\u00e7o inoxid\u00e1vel da Truer formulou um processo de controle de liga de N ajust\u00e1vel para obter um controle de N est\u00e1vel e preciso. O n\u00edvel de controle da s\u00e9rie de a\u00e7o inoxid\u00e1vel duplex com N produzido pela Truer \u00e9 mostrado na Figura 3, e o teor de N de todos os tipos de a\u00e7o inoxid\u00e1vel duplex em todos os fornos \u00e9 controlado dentro da faixa-alvo. O teor de N do 2205 pode ser controlado de forma est\u00e1vel entre 0,16 e 0,19% em peso, o teor de N do 2507 entre 0,26 e 0,30% em peso e o do 2707 entre 0,42 e 0,46% em peso.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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A Figura 4 mostra as altera\u00e7\u00f5es dos principais elementos de liga em diferentes fornos do a\u00e7o inoxid\u00e1vel duplex 2507 produzido pela Truer. Ela mostra que o conte\u00fado de v\u00e1rios elementos de liga \u00e9 basicamente o mesmo em diferentes fornos, mostrando uma boa capacidade de controle de fundi\u00e7\u00e3o.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Por esse motivo de controle de elementos de liga, a equipe de p\u00f3s de a\u00e7o inoxid\u00e1vel da Truer desenvolveu uma tecnologia de atomiza\u00e7\u00e3o orientada por dados, concluiu o c\u00e1lculo de simula\u00e7\u00e3o de par\u00e2metros, incluindo a transi\u00e7\u00e3o de fase durante a solidifica\u00e7\u00e3o, a mudan\u00e7a de condutividade t\u00e9rmica durante a solidifica\u00e7\u00e3o e as propriedades f\u00edsicas do metal l\u00edquido (viscosidade, tens\u00e3o superficial), e estabeleceu um conjunto completo de \"propriedades f\u00edsicas do processo de solidifica\u00e7\u00e3o de metal\", que fornece suporte completo de dados para a atomiza\u00e7\u00e3o a g\u00e1s do a\u00e7o inoxid\u00e1vel duplex.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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A Figura 9 mostra a morfologia do SEM do p\u00f3 de a\u00e7o inoxid\u00e1vel super duplex 2507 com PSD 15-53\u03bcm produzido pela Truer. O p\u00f3 tem boa esfericidade, superf\u00edcie lisa e poucas esferas sat\u00e9lites. E a Tabela 3 apresenta a compara\u00e7\u00e3o das propriedades f\u00edsicas de diferentes graus de p\u00f3s de a\u00e7o inoxid\u00e1vel duplex. Ela mostra que o controle do tamanho das part\u00edculas (15-53um) \u00e9 muito est\u00e1vel (D10:18-23um, D50:32-36um, D90:52-56um).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Grau<\/td>\nN\u00ba UNS<\/td>\nDistribui\u00e7\u00e3o de tamanho<\/td>\nFluidez (s\/50g)<\/td>\nDensidade aparente (g\/cm\u00b3)<\/td>\nTap Density(g\/cm\u00b3)<\/td>\n<\/tr>\n
2205<\/td>\nS32205<\/td>\nD10\/um:21,6\nD50\/um:34,7\nD90\/um:54,3<\/td>\n20<\/td>\n4.20<\/td>\n4.73<\/td>\n<\/tr>\n
2507<\/td>\nS32507<\/td>\nD10\/um:20,3\nD50\/um:32,9\nD90\/um:52,4<\/td>\n19.8<\/td>\n4.18<\/td>\n4.7<\/td>\n<\/tr>\n
2707<\/td>\nS32707<\/td>\nD10\/um:20,5\nD50\/um:33,1\nD90\/um:53,5<\/td>\n19.6<\/td>\n4.16<\/td>\n4.68<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Tabela 3 Propriedades f\u00edsicas de diferentes p\u00f3s de a\u00e7o inoxid\u00e1vel duplex com PSD 15-53um<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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A equipe de pesquisa e desenvolvimento de p\u00f3s de a\u00e7o inoxid\u00e1vel tamb\u00e9m realizou a inspe\u00e7\u00e3o metalogr\u00e1fica do p\u00f3 de a\u00e7o inoxid\u00e1vel duplex. A Figura 10 mostra o estado de corros\u00e3o do p\u00f3 no p\u00f3 2507 com PSD 15-53\u03bcm. Pode-se observar claramente na figura que o interior do p\u00f3 tem uma estrutura cristalina equiaxial uniforme.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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A Truers realizou com sucesso o lote de a\u00e7o inoxid\u00e1vel de fase dupla em s\u00e9rie e a produ\u00e7\u00e3o est\u00e1vel, contribuindo para a pesquisa e o desenvolvimento, incluindo o projeto assistido por computador de liga, o processo de liga ajust\u00e1vel \u00e0 atmosfera, a atomiza\u00e7\u00e3o de g\u00e1s personalizada orientada por dados e outras tecnologias de controle integrado.<\/p>

A Truer desenvolveu e produziu uma s\u00e9rie de produtos em p\u00f3 de alta qualidade, como a superliga \u00e0 base de n\u00edquel Inconel 738LC, CMSX-4, Haynes 230, Hastelloy B, Monel 400, BNi-7, NiCrAlY, Nitinol NiTi50, Invar 36, a superliga \u00e0 base de Co Triballoy T800, Haynes 188 e a liga de alta entropia FeCoCrNiMn, AlCoCrFeNi, FeCoNiCrTi, WMoTaNbZr, FeCoNiCrV, CoCrNi e assim por diante.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\tEntre em contato agora<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

Duplex stainless steel powder 2205, 2507 & 2707 With the rapid development of additive manufacturing technology represented by 3D printing, super duplex stainless-steel has begun to be applied in various fields such as Marine, chemical and petroleum. The precise and controllable chemical composition of duplex stainless-steel powder is the basis and difficulty of the preparation […]<\/p>\n","protected":false},"author":5,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","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":"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":""},"folder":[],"class_list":["post-7510","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/am-material.com\/pt\/wp-json\/wp\/v2\/pages\/7510","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/am-material.com\/pt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/am-material.com\/pt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/am-material.com\/pt\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/am-material.com\/pt\/wp-json\/wp\/v2\/comments?post=7510"}],"version-history":[{"count":4,"href":"https:\/\/am-material.com\/pt\/wp-json\/wp\/v2\/pages\/7510\/revisions"}],"predecessor-version":[{"id":7521,"href":"https:\/\/am-material.com\/pt\/wp-json\/wp\/v2\/pages\/7510\/revisions\/7521"}],"wp:attachment":[{"href":"https:\/\/am-material.com\/pt\/wp-json\/wp\/v2\/media?parent=7510"}],"wp:term":[{"taxonomy":"folder","embeddable":true,"href":"https:\/\/am-material.com\/pt\/wp-json\/wp\/v2\/folder?post=7510"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}