{"id":15321,"date":"2021-11-29T12:27:31","date_gmt":"2021-11-29T12:27:31","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=15321"},"modified":"2025-08-29T07:58:39","modified_gmt":"2025-08-29T07:58:39","slug":"tratamento-de-solucao-de-acessorios-para-tubos-de-aco-inoxidavel","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/pt\/blog\/tratamento-de-solucao-de-acessorios-para-tubos-de-aco-inoxidavel\/","title":{"rendered":"Tratamento de Solu\u00e7\u00e3o de Conex\u00f5es para Tubos de A\u00e7o Inoxid\u00e1vel"},"content":{"rendered":"
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Tratamento de Solu\u00e7\u00e3o de Conex\u00f5es para Tubos de A\u00e7o Inoxid\u00e1vel<\/h2>\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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Por que os tubos e conex\u00f5es de a\u00e7o inoxid\u00e1vel requerem tratamento de solu\u00e7\u00e3o?<\/h2>

A raz\u00e3o \u00e9 que ela pode ajudar a restaurar a resist\u00eancia inerente \u00e0 corros\u00e3o do a\u00e7o inoxid\u00e1vel.<\/p>

Devido \u00e0 precipita\u00e7\u00e3o de carboneto e aos defeitos na malha causados pelo processamento a frio, a resist\u00eancia \u00e0 corros\u00e3o do a\u00e7o inoxid\u00e1vel ser\u00e1 reduzida. Entretanto, ap\u00f3s o tratamento da solu\u00e7\u00e3o, a resist\u00eancia \u00e0 corros\u00e3o de conex\u00f5es para tubos de a\u00e7o inoxid\u00e1vel<\/a> pode ser restaurado ao melhor.<\/p>

Para tubos e acess\u00f3rios de a\u00e7o inoxid\u00e1vel<\/a>Os tr\u00eas fatores mais importantes s\u00e3o a temperatura, a preserva\u00e7\u00e3o do tempo e a velocidade de resfriamento. A temperatura para o tratamento da solu\u00e7\u00e3o \u00e9 determinada por seus componentes qu\u00edmicos.<\/p>

Em geral, mais componentes e maior teor da liga significam que a temperatura da solu\u00e7\u00e3o deve ser aumentada de acordo, especialmente para o a\u00e7o com alto teor de mangan\u00eas, molibd\u00eanio<\/a>n\u00edquel e sil\u00edcio. O amolecimento<\/a> pode ser alcan\u00e7ado e totalmente dissolvido ap\u00f3s o aumento da temperatura da solu\u00e7\u00e3o.<\/p>

No entanto, para alguns a\u00e7os estabilizados, como o 1Cr18Ni9Ti, seus carbonetos de elementos estabilizados ser\u00e3o totalmente dissolvidos na austenita em alta temperatura de solu\u00e7\u00e3o. Ap\u00f3s o resfriamento, ele precipitar\u00e1 na forma de Cr23C6 nos limites dos gr\u00e3os, resultando em corros\u00e3o intergranular<\/a>. Para evitar a decomposi\u00e7\u00e3o e a solu\u00e7\u00e3o s\u00f3lida dos carbonetos (TiC e Nbc) de elementos estabilizados, recomenda-se adotar uma baixa temperatura de solu\u00e7\u00e3o s\u00f3lida.<\/p>

O a\u00e7o inoxid\u00e1vel de que costumamos falar refere-se aos a\u00e7os que se sentem desconfort\u00e1veis \u00e0 ferrugem. De fato, alguns a\u00e7os inoxid\u00e1veis t\u00eam tanto resist\u00eancia \u00e0 ferrugem quanto \u00e0 corros\u00e3o. E isto \u00e9 conseguido pela pel\u00edcula de \u00f3xido rico em cromo (pel\u00edcula de passiva\u00e7\u00e3o) em sua superf\u00edcie. Para o a\u00e7o inoxid\u00e1vel, sua resist\u00eancia \u00e0 ferrugem e resist\u00eancia \u00e0 corros\u00e3o s\u00e3o relativas.<\/p>

A experi\u00eancia tem mostrado que a resist\u00eancia \u00e0 corros\u00e3o do a\u00e7o inoxid\u00e1vel na atmosfera, \u00e1gua e meio oxidante est\u00e1 relacionada ao cromo. Um maior teor de cromo trar\u00e1 uma melhor resist\u00eancia \u00e0 corros\u00e3o. Quando o teor de cromo atingir 100%, ele se tornar\u00e1 n\u00e3o resistente \u00e0 ferrugem e resistente \u00e0 corros\u00e3o.<\/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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Temperatura de aquecimento, tempo de preserva\u00e7\u00e3o e velocidade de resfriamento s\u00e3o os tr\u00eas principais par\u00e2metros que devem ser controlados no recozimento de solu\u00e7\u00f5es:<\/p>

Em princ\u00edpio, a temperatura de aquecimento pode ser determinada de acordo com o diagrama de fases correspondente. E a temperatura limite superior \u00e9 normalmente pr\u00f3xima \u00e0 temperatura da linha s\u00f3lida ou temperatura eut\u00e9tica. Sob uma temperatura t\u00e3o alta, a liga ter\u00e1 a solubilidade s\u00f3lida m\u00e1xima e a taxa de difus\u00e3o r\u00e1pida. Entretanto, a temperatura n\u00e3o deve ser muito alta, caso contr\u00e1rio, levar\u00e1 \u00e0 fus\u00e3o eut\u00e9tica de baixo ponto de fus\u00e3o e fase limite do gr\u00e3o, o que \u00e9 conhecido como fen\u00f4meno de queima excessiva, trazendo rachaduras de t\u00eampera e resist\u00eancia reduzida.<\/p>

A temperatura m\u00ednima de aquecimento deve ser superior \u00e0 curva da solu\u00e7\u00e3o (Linha AB na figura), ou o desempenho do a\u00e7o n\u00e3o atender\u00e1 \u00e0s exig\u00eancias ap\u00f3s o envelhecimento. A faixa de temperaturas de aquecimento permitidas pode variar muito de liga para liga. A faixa de temperatura de aquecimento de algumas ligas de cobre e a\u00e7os-liga \u00e9 ampla, enquanto a faixa de temperatura de t\u00eampera da maioria das ligas de alum\u00ednio \u00e9 muito estreita, algumas at\u00e9 mesmo permitem apenas as diferen\u00e7as de 5 graus Celsius.<\/p>

O objetivo da preserva\u00e7\u00e3o da temperatura \u00e9 transformar suficientemente a estrutura da liga para o estado necess\u00e1rio para o resfriamento. E o tempo de preserva\u00e7\u00e3o depende principalmente da composi\u00e7\u00e3o da liga, do pr\u00e9-tratamento do material, da estrutura original, da temperatura de aquecimento e assim por diante, bem como da quantidade de forno, da espessura da pe\u00e7a, do m\u00e9todo de aquecimento e outros fatores. Se a estrutura original for fina, a temperatura de aquecimento for alta, a quantidade de carga for pequena, ou o tamanho da se\u00e7\u00e3o da pe\u00e7a for pequeno, ent\u00e3o o tempo de preserva\u00e7\u00e3o ser\u00e1 curto.<\/p>

Para o recozimento de solu\u00e7\u00f5es, ele geralmente adota o resfriamento r\u00e1pido. E seu objetivo \u00e9 inibir a precipita\u00e7\u00e3o da segunda fase durante o processo de resfriamento e garantir a m\u00e1xima supersatura\u00e7\u00e3o de \u00e1tomos de soluto e vagas, de modo a obter a maior resist\u00eancia e a melhor resist\u00eancia \u00e0 corros\u00e3o ap\u00f3s o envelhecimento. E a \u00e1gua \u00e9 amplamente utilizada como um meio de resfriamento eficaz. A maioria dos produtos de alum\u00ednio, magn\u00e9sio, cobre, n\u00edquel e ligas \u00e0 base de ferro pode atingir velocidade de resfriamento r\u00e1pida.<\/p>

No entanto, o resfriamento na \u00e1gua pode facilmente causar grandes tens\u00f5es residuais e deforma\u00e7\u00f5es. Para superar esta defici\u00eancia, a temperatura da \u00e1gua pode ser adequadamente aumentada, ou resfriamento de produtos em \u00f3leo, ar e alguns meios org\u00e2nicos especiais. E alguns m\u00e9todos especiais de t\u00eampera podem ser adotados, como a t\u00eampera isot\u00e9rmica e a t\u00eampera fracion\u00e1ria.<\/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\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\tTwitter\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\tLinkedIn\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\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},"featured_media":15353,"template":"","categories":[85],"tags":[255],"class_list":["post-15321","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-news","tag-heat-treatment"],"yoast_head":"\nSolution Treatment of Stainless Steel Pipe Fittings | KAYSUNS<\/title>\n<meta name=\"description\" content=\"Why does stainless steel pipe require solution treatment? It can help to restore the inherent corrosion resistance of stainless steel.\" \/>\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\/tratamento-de-solucao-de-acessorios-para-tubos-de-aco-inoxidavel\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Solution Treatment of Stainless Steel Pipe Fittings | KAYSUNS\" \/>\n<meta property=\"og:description\" content=\"Why does stainless steel pipe require solution treatment? 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