{"id":6212,"date":"2020-07-07T07:33:22","date_gmt":"2020-07-07T07:33:22","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=6212"},"modified":"2025-07-01T06:30:54","modified_gmt":"2025-07-01T06:30:54","slug":"influencias-do-elemento-niquel-no-aco-inoxidavel","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/pt\/blog\/influencias-do-elemento-niquel-no-aco-inoxidavel\/","title":{"rendered":"Influ\u00eancias do elemento de n\u00edquel no a\u00e7o inoxid\u00e1vel"},"content":{"rendered":"

O n\u00edquel \u00e9 o principal elemento de liga do a\u00e7o inoxid\u00e1vel austen\u00edtico.<\/strong> <\/h2>\n\n\n\n

Seu papel principal \u00e9 estabilizar um milh\u00e3o de austenita, para que o a\u00e7o obtenha uma estrutura completa de austenita, para que o a\u00e7o tenha uma boa combina\u00e7\u00e3o de resist\u00eancia e plasticidade, dureza, e tenha Excelente trabalhabilidade a quente e frio, formabilidade a frio, baixa temperatura e propriedades n\u00e3o magn\u00e9ticas. \u00c9 por isso que os tubos e acess\u00f3rios contendo n\u00edquel s\u00e3o mais populares de fornecedor de acess\u00f3rios para tubos de a\u00e7o inoxid\u00e1vel<\/a><\/p>\n\n\n

\n
\"estrutura
ferro n\u00edquel<\/figcaption><\/figure>\n<\/div>\n\n\n

O n\u00edquel melhora a estabilidade termodin\u00e2mica do a\u00e7o inoxid\u00e1vel austen\u00edtico, fazendo com que ele n\u00e3o s\u00f3 tenha melhor desempenho em meio inoxid\u00e1vel e oxidante do que a ferrita, a martensita e outros a\u00e7os inoxid\u00e1veis com o mesmo teor de cromo\/molibd\u00eanio<\/a> mas tamb\u00e9m na superf\u00edcie, a estabilidade da membrana \u00e9 aprimorada, de modo que o a\u00e7o tamb\u00e9m tem excelente resist\u00eancia a alguns meios redutores.<\/p>\n\n\n\n

O n\u00edquel \u00e9 um elemento que estabiliza a estrutura da austenita<\/strong><\/h3>\n\n\n\n

Para obter uma estrutura de austenita \u00fanica, o conte\u00fado m\u00ednimo de n\u00edquel necess\u00e1rio quando o a\u00e7o cont\u00e9m 0,1% de carbono e 18% cromo \u00e9 cerca de 8%, que \u00e9 a base do mais famoso Minuto de a\u00e7o inoxid\u00e1vel austen\u00edtico de cromo-n\u00edquel 18-8.<\/p>\n\n\n\n

No a\u00e7o inoxid\u00e1vel austen\u00edtico, com o aumento do teor de n\u00edquel, a ferrita residual pode ser completamente eliminada, e a tend\u00eancia de forma\u00e7\u00e3o da fase \u03c3 \u00e9 significativamente reduzida; ao mesmo tempo, a temperatura da martensita para redu\u00e7\u00e3o do hidrocarboneto \u00e9 reduzida, e mesmo a transi\u00e7\u00e3o de fase \u03bb \u2192 M pode n\u00e3o ocorrer, mas O aumento do teor de n\u00edquel reduzir\u00e1 a solubilidade do carbono no a\u00e7o inoxid\u00e1vel austen\u00edtico, o que aumentar\u00e1 a tend\u00eancia de precipita\u00e7\u00e3o de carbonetos.<\/p>\n\n\n\n

O efeito do n\u00edquel nas propriedades mec\u00e2nicas do a\u00e7o inoxid\u00e1vel austen\u00edtico<\/strong><\/h3>\n\n\n\n

Isso \u00e9 determinado pela influ\u00eancia do n\u00edquel na estabilidade da austenita. Na faixa de teor de n\u00edquel em que a transforma\u00e7\u00e3o da martensita pode ocorrer no a\u00e7o, \u00e0 medida que o teor de n\u00edquel aumenta, a resist\u00eancia do a\u00e7o diminui e a plasticidade da folha aumenta, com austenita est\u00e1vel. <\/p>\n\n\n\n

A estrutura do a\u00e7o inoxid\u00e1vel austen\u00edtico cromo-n\u00edquel tem excelente tenacidade (incluindo tenacidade a temperaturas extremamente baixas), portanto, pode ser usado como a\u00e7o de baixa temperatura.<\/p>\n\n\n\n

No a\u00e7o inoxid\u00e1vel austen\u00edtico, a adi\u00e7\u00e3o de n\u00edquel e o aumento do teor de n\u00edquel levam a um aumento na estabilidade termodin\u00e2mica do a\u00e7o. Portanto, o a\u00e7o inoxid\u00e1vel austen\u00edtico tem melhor desempenho em meio inoxid\u00e1vel e oxidativo, e com o n\u00edquel. \u00c0 medida que o conte\u00fado aumenta, o desempenho do meio resistente \u00e0 redu\u00e7\u00e3o \u00e9 melhorado ainda mais. <\/p>\n\n\n\n

\u00c9 importante ressaltar que o n\u00edquel \u00e9 o \u00fanico elemento importante que melhora a resist\u00eancia do a\u00e7o inoxid\u00e1vel austen\u00edtico a muitas tens\u00f5es de corros\u00e3o de transforma\u00e7\u00e3o m\u00e9dia em muitos meios.<\/p>\n\n\n\n

Efeito do n\u00edquel na resist\u00eancia \u00e0 corros\u00e3o da estrutura de austenita de a\u00e7o inoxid\u00e1vel<\/strong><\/h3>\n\n\n\n

Sob condi\u00e7\u00f5es de alta temperatura e alta press\u00e3o, o aumento no teor de n\u00edquel leva ao aumento da sensibilidade \u00e0 corros\u00e3o por tens\u00e3o intergranular de a\u00e7o e ligas, mas esse efeito adverso ser\u00e1 aliviado ou suprimido devido ao aumento no teor de cromo no a\u00e7o e ligas.<\/p>\n\n\n\n

Com o aumento do teor de n\u00edquel no a\u00e7o inoxid\u00e1vel austen\u00edtico, o teor cr\u00edtico de carbono de corros\u00e3o intergranular<\/a> diminui, ou seja, a sensibilidade da corros\u00e3o intergranular do a\u00e7o aumenta, assim como a resist\u00eancia \u00e0 corros\u00e3o por pite e \u00e0 corros\u00e3o em fresta do a\u00e7o inoxid\u00e1vel austen\u00edtico, n\u00edquel O efeito n\u00e3o \u00e9 significativo.<\/p>\n\n\n\n

Al\u00e9m disso, o n\u00edquel tamb\u00e9m melhora a resist\u00eancia \u00e0 oxida\u00e7\u00e3o em alta temperatura dos a\u00e7os inoxid\u00e1veis austen\u00edticos, o que se deve principalmente ao fato de que o n\u00edquel melhora a composi\u00e7\u00e3o do filme de \u00f3xido de cromo, a estrutura e o desempenho s\u00e3o reduzidos e quanto maior o teor de n\u00edquel, o mais prejudicial \u00e9 por causa do sulfeto de n\u00edquel de baixo ponto de fus\u00e3o no a\u00e7o causado por.<\/p>","protected":false},"featured_media":3541,"template":"","categories":[186],"tags":[],"class_list":["post-6212","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"\nNickel On Austenite Structure - Stainless Steel PIpe Fittings Supplier<\/title>\n<meta name=\"description\" content=\"Nickel is to stabilize one million of austenite, the steel obtains a complete austenite structure, has a good combination of strength, toughness, etc.\" \/>\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\/influencias-do-elemento-niquel-no-aco-inoxidavel\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Nickel On Austenite Structure - 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