Conforma\u00e7\u00e3o a frio para tubo duplex <\/strong><\/h3>\nOs a\u00e7os inoxid\u00e1veis duplex t\u00eam uma boa formabilidade em v\u00e1rios processos. Nossos tubos de a\u00e7o duplex s\u00e3o normalmente trabalhados a frio - laminados a frio ou trefilados a frio. Naturalmente, para tubos de a\u00e7o duplex de grande di\u00e2metro, tamb\u00e9m podemos utilizar a conforma\u00e7\u00e3o a quente. Durante o trabalho a frio, uma grande preocupa\u00e7\u00e3o \u00e9 que a alta resist\u00eancia do a\u00e7o inoxid\u00e1vel duplex e a pot\u00eancia do equipamento de conforma\u00e7\u00e3o. Para espessura de parede convencional, o di\u00e2metro externo de nossos tubos de a\u00e7o sem costura tubo duplex 2205<\/a> pode ser 24 \"(DN600), e o tubo super duplex 2507 pode ser 16\u2033(DN400) o di\u00e2metro externo.<\/p>\nUma estimativa comum \u00e9 que a for\u00e7a de forma\u00e7\u00e3o para tubo de a\u00e7o inoxid\u00e1vel duplex \u00e9 cerca de duas vezes da mesma espessura de forma\u00e7\u00e3o de tubo de a\u00e7o inoxid\u00e1vel austen\u00edtico s\u00e9rie 300. A compara\u00e7\u00e3o da for\u00e7a externa m\u00ednima necess\u00e1ria para a deforma\u00e7\u00e3o pl\u00e1stica de diversos a\u00e7os inoxid\u00e1veis durante o processo de flex\u00e3o \u00e9 apresentada na Figura 01.<\/p>\n![\"\"](\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2019\/12\/122222222.jpg\")
<\/a>Figura 01 For\u00e7a externa m\u00ednima de deforma\u00e7\u00e3o pl\u00e1stica para a\u00e7o inoxid\u00e1vel e a\u00e7o duplo 2304,2205<\/figcaption><\/figure>\n(amostra: 50 mm, espessura de 2 mm)<\/p>\n
Al\u00e9m da grande for\u00e7a externa inicial necess\u00e1ria para dobrar, o tubo de a\u00e7o inoxid\u00e1vel duplex tamb\u00e9m tem um forte endurecimento durante a deforma\u00e7\u00e3o. Ao determinar a espessura m\u00e1xima do material que pode ser formado no equipamento, o r\u00e1pido aumento da resist\u00eancia durante a deforma\u00e7\u00e3o tamb\u00e9m deve ser considerado. Mesmo que a pot\u00eancia do equipamento seja alta o suficiente, deve haver uma margem para o maior ressalto causado pela alta resist\u00eancia do a\u00e7o inoxid\u00e1vel duplex (ver Figura 02).<\/p>\n![\"For\u00e7a](\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2019\/12\/Bending-Force-of-Stainless-Steel-Duple.jpg\")
<\/a>Figura 02<\/figcaption><\/figure>\nTamb\u00e9m \u00e9 necess\u00e1rio levar em considera\u00e7\u00e3o a menor ductilidade dos a\u00e7os inoxid\u00e1veis duplex em compara\u00e7\u00e3o aos a\u00e7os inoxid\u00e1veis austen\u00edticos. A maioria das especifica\u00e7\u00f5es t\u00e9cnicas exige um alongamento m\u00ednimo de 15%-30% para a\u00e7os inoxid\u00e1veis duplex e um alongamento m\u00ednimo de 40% para a\u00e7o inoxid\u00e1vel austen\u00edtico. Embora o alongamento real possa ser maior, a rela\u00e7\u00e3o entre os valores mais baixos \u00e9 apropriada e pode ser um guia \u00fatil para opera\u00e7\u00f5es de trabalho a frio.<\/p>\n
Comparados com os a\u00e7os inoxid\u00e1veis austen\u00edticos, os a\u00e7os inoxid\u00e1veis duplex requerem um raio de curvatura maior e, devido \u00e0 sua menor plasticidade, o recozimento intermedi\u00e1rio \u00e9 necess\u00e1rio na conforma\u00e7\u00e3o severa ou complexa. Durante a fabrica\u00e7\u00e3o de tubos duplex sem costura, precisamos fazer um tratamento t\u00e9rmico correspondente para cada processo de conforma\u00e7\u00e3o a frio de tubos de a\u00e7o duplex. Aumenta muito o custo de fabrica\u00e7\u00e3o de tubos de a\u00e7o duplex.<\/p>\n
Tratamento T\u00e9rmico de Tubula\u00e7\u00e3o Duplex<\/strong><\/h3>\nAp\u00f3s a conforma\u00e7\u00e3o a frio, uma solu\u00e7\u00e3o completa de recozimento \u00e9 necess\u00e1ria para o tubo e, em seguida, uma t\u00eampera r\u00e1pida para restaurar totalmente as propriedades mec\u00e2nicas e a resist\u00eancia \u00e0 corros\u00e3o. o tubo duplex<\/a> deve ser aquecido acima da temperatura m\u00ednima de recozimento da solu\u00e7\u00e3o, e ent\u00e3o mantido por um tempo suficiente para dissolver completamente a fase intermet\u00e1lica. Uma diretriz mais conservadora \u00e9 que o tempo de reten\u00e7\u00e3o deve ser compar\u00e1vel ao tempo total da pe\u00e7a permaneceu na faixa de 650-980 \u00b0 C (1200-1800 \u00b0 F) ap\u00f3s o recozimento completo anterior. O tubo deve ser resfriado com \u00e1gua a partir da temperatura de tratamento da solu\u00e7\u00e3o. A Tabela 01 resume as temperaturas m\u00ednimas de recozimento da solu\u00e7\u00e3o para tubos duplex de a\u00e7o inoxid\u00e1vel.<\/p>\n![\"Min.](\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2019\/12\/Min.-Solution-Annealing-Temperature-of-Duplex-Steel-Pipe-ASTM-A-790.jpg\")
<\/a>Tabela 01
Min. Temperatura de recozimento da solu\u00e7\u00e3o de tubo de a\u00e7o duplex (ASTM A 790)<\/figcaption><\/figure>\n <\/p>","protected":false},"featured_media":5351,"template":"","categories":[186],"tags":[],"class_list":["post-5473","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"\n
Manufacturing Process of Duplex Pipe - Why Duplex Pipe is Expensive - Stainless Steel Pipe and Fittings | KAYSUNS<\/title>\n<meta name=\"description\" content=\"After more than ten years of development, the manufacturing process of duplex stainless steel pipes has gradually matured, it made the material from high-end to ordinary applications.\" \/>\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\/processo-de-fabricacao-do-tubo-duplex-por-que-o-tubo-duplex-e-caro\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Manufacturing Process of Duplex Pipe - Why Duplex Pipe is Expensive - Stainless Steel Pipe and Fittings | KAYSUNS\" \/>\n<meta property=\"og:description\" content=\"After more than ten years of development, the manufacturing process of duplex stainless steel pipes has gradually matured, it made the material from high-end to ordinary applications.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.kaysuns.com\/pt\/blog\/processo-de-fabricacao-do-tubo-duplex-por-que-o-tubo-duplex-e-caro\/\" \/>\n<meta property=\"og:site_name\" content=\"Stainless Steel Pipe and Fittings | KAYSUNS\" \/>\n<meta property=\"article:modified_time\" content=\"2022-06-30T09:03:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2019\/10\/tubings.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2592\" \/>\n\t<meta property=\"og:image:height\" content=\"1944\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. tempo de leitura\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.kaysuns.com\/blog\/manufacturing-process-of-duplex-pipe-why-duplex-pipe-is-expensive\/\",\"url\":\"https:\/\/www.kaysuns.com\/blog\/manufacturing-process-of-duplex-pipe-why-duplex-pipe-is-expensive\/\",\"name\":\"Manufacturing Process of Duplex Pipe - 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Uma estimativa comum \u00e9 que a for\u00e7a de forma\u00e7\u00e3o para tubo de a\u00e7o inoxid\u00e1vel duplex \u00e9 cerca de duas vezes da mesma espessura de forma\u00e7\u00e3o de tubo de a\u00e7o inoxid\u00e1vel austen\u00edtico s\u00e9rie 300. A compara\u00e7\u00e3o da for\u00e7a externa m\u00ednima necess\u00e1ria para a deforma\u00e7\u00e3o pl\u00e1stica de diversos a\u00e7os inoxid\u00e1veis durante o processo de flex\u00e3o \u00e9 apresentada na Figura 01.<\/p>\n (amostra: 50 mm, espessura de 2 mm)<\/p>\n Al\u00e9m da grande for\u00e7a externa inicial necess\u00e1ria para dobrar, o tubo de a\u00e7o inoxid\u00e1vel duplex tamb\u00e9m tem um forte endurecimento durante a deforma\u00e7\u00e3o. Ao determinar a espessura m\u00e1xima do material que pode ser formado no equipamento, o r\u00e1pido aumento da resist\u00eancia durante a deforma\u00e7\u00e3o tamb\u00e9m deve ser considerado. Mesmo que a pot\u00eancia do equipamento seja alta o suficiente, deve haver uma margem para o maior ressalto causado pela alta resist\u00eancia do a\u00e7o inoxid\u00e1vel duplex (ver Figura 02).<\/p>\n Tamb\u00e9m \u00e9 necess\u00e1rio levar em considera\u00e7\u00e3o a menor ductilidade dos a\u00e7os inoxid\u00e1veis duplex em compara\u00e7\u00e3o aos a\u00e7os inoxid\u00e1veis austen\u00edticos. A maioria das especifica\u00e7\u00f5es t\u00e9cnicas exige um alongamento m\u00ednimo de 15%-30% para a\u00e7os inoxid\u00e1veis duplex e um alongamento m\u00ednimo de 40% para a\u00e7o inoxid\u00e1vel austen\u00edtico. Embora o alongamento real possa ser maior, a rela\u00e7\u00e3o entre os valores mais baixos \u00e9 apropriada e pode ser um guia \u00fatil para opera\u00e7\u00f5es de trabalho a frio.<\/p>\n Comparados com os a\u00e7os inoxid\u00e1veis austen\u00edticos, os a\u00e7os inoxid\u00e1veis duplex requerem um raio de curvatura maior e, devido \u00e0 sua menor plasticidade, o recozimento intermedi\u00e1rio \u00e9 necess\u00e1rio na conforma\u00e7\u00e3o severa ou complexa. Durante a fabrica\u00e7\u00e3o de tubos duplex sem costura, precisamos fazer um tratamento t\u00e9rmico correspondente para cada processo de conforma\u00e7\u00e3o a frio de tubos de a\u00e7o duplex. Aumenta muito o custo de fabrica\u00e7\u00e3o de tubos de a\u00e7o duplex.<\/p>\n Ap\u00f3s a conforma\u00e7\u00e3o a frio, uma solu\u00e7\u00e3o completa de recozimento \u00e9 necess\u00e1ria para o tubo e, em seguida, uma t\u00eampera r\u00e1pida para restaurar totalmente as propriedades mec\u00e2nicas e a resist\u00eancia \u00e0 corros\u00e3o. o tubo duplex<\/a> deve ser aquecido acima da temperatura m\u00ednima de recozimento da solu\u00e7\u00e3o, e ent\u00e3o mantido por um tempo suficiente para dissolver completamente a fase intermet\u00e1lica. Uma diretriz mais conservadora \u00e9 que o tempo de reten\u00e7\u00e3o deve ser compar\u00e1vel ao tempo total da pe\u00e7a permaneceu na faixa de 650-980 \u00b0 C (1200-1800 \u00b0 F) ap\u00f3s o recozimento completo anterior. O tubo deve ser resfriado com \u00e1gua a partir da temperatura de tratamento da solu\u00e7\u00e3o. A Tabela 01 resume as temperaturas m\u00ednimas de recozimento da solu\u00e7\u00e3o para tubos duplex de a\u00e7o inoxid\u00e1vel.<\/p>\n <\/p>","protected":false},"featured_media":5351,"template":"","categories":[186],"tags":[],"class_list":["post-5473","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"\n<\/a><\/a>Tratamento T\u00e9rmico de Tubula\u00e7\u00e3o Duplex<\/strong><\/h3>\n
<\/a>
Min. Temperatura de recozimento da solu\u00e7\u00e3o de tubo de a\u00e7o duplex (ASTM A 790)<\/figcaption><\/figure>\n