{"id":698,"date":"2019-03-19T20:18:13","date_gmt":"2019-03-19T17:18:13","guid":{"rendered":"https:\/\/metallsmaster.ru\/?p=698"},"modified":"2020-11-02T10:13:12","modified_gmt":"2020-11-02T07:13:12","slug":"diffuzionnaya-svarka","status":"publish","type":"post","link":"https:\/\/metallsmaster.pro\/pt\/soldagem-por-difusao-2\/","title":{"rendered":"Soldagem por difus\u00e3o"},"content":{"rendered":"<p>Em 1953, foi desenvolvido um novo m\u00e9todo de uni\u00e3o de metais por soldagem - este \u00e9 <strong>soldagem por difus\u00e3o. <\/strong>\u00c9 um tipo de soldagem por press\u00e3o em que pe\u00e7as altamente aquecidas sofrem difus\u00e3o m\u00fatua de \u00e1tomos em contato ao longo do tempo. Este m\u00e9todo permite a uni\u00e3o muito forte de diferentes metais e suas ligas, ferrosos e n\u00e3o ferrosos, de espessuras variadas.\u00a0 <strong>Soldagem por difus\u00e3o <\/strong>Pode ser autom\u00e1tico ou semiautom\u00e1tico, com pe\u00e7as soldadas em diversas posi\u00e7\u00f5es. A soldagem ocorre por meio de calor e press\u00e3o em um ambiente protetor.<\/p>\n<h2>Soldagem por difus\u00e3o de metais<\/h2>\n\n\t<!--<div class='top-banner-pages'>\t\n\n\t<\/div>--->\n\t\n<p>Recurso <strong>soldagem por difus\u00e3o de metal <\/strong>A diferen\u00e7a de outros m\u00e9todos de soldagem por press\u00e3o \u00e9 a alta temperatura de aquecimento do metal 0,5 - 0,7T<sub>por favor<\/sub>, bem como press\u00f5es compressivas espec\u00edficas relativamente baixas de 0,5-0 MPa, mantendo-se a isotermia por alguns minutos a v\u00e1rias horas. A liga\u00e7\u00e3o por difus\u00e3o de \u00e1tomos \u00e9 determinada por processos f\u00edsicos e qu\u00edmicos durante a soldagem, a saber: a intera\u00e7\u00e3o do metal aquecido com os gases do ambiente circundante, a limpeza da superf\u00edcie da solda de \u00f3xidos e o desenvolvimento de recristaliza\u00e7\u00e3o e flu\u00eancia.<\/p>\n<p>Para conclus\u00e3o bem-sucedida <strong>soldagem por difus\u00e3o de metal, <\/strong>\u00c9 necess\u00e1rio reduzir a taxa de oxida\u00e7\u00e3o das pe\u00e7as. Isso \u00e9 obtido por meio do uso de gases redutores, fluxos, sais fundidos e revestimentos, mas gases inertes e v\u00e1cuo s\u00e3o os mais comuns. Nesse tipo de soldagem, metais homog\u00eaneos alcan\u00e7am uma liga\u00e7\u00e3o forte quando a estrutura da zona de uni\u00e3o \u00e9 a mesma do material base. Isso \u00e9 facilitado pelos gr\u00e3os comuns aos materiais a serem unidos. <strong>Soldagem por difus\u00e3o <\/strong>Cria juntas de alta qualidade entre materiais diferentes. As pe\u00e7as podem variar em formato e ter superf\u00edcies de contato compactas.<\/p>\n<p><strong>\n<!---<div class='top-banner-pages'>\n\n<\/div>-->\n\n\t<\/strong><\/p>\n<p><strong>Tecnologia de soldagem por difus\u00e3o:<\/strong><\/p>\n<ul>\n<li>Para come\u00e7ar, a superf\u00edcie met\u00e1lica \u00e9 completamente limpa e uma dist\u00e2ncia suficiente \u00e9 estabelecida entre as pe\u00e7as de trabalho para estabelecer uma conex\u00e3o met\u00e1lica;<\/li>\n<li>ent\u00e3o ocorre um forte aquecimento, que ajuda a proteger a superf\u00edcie da contamina\u00e7\u00e3o, limp\u00e1-la e dessorver \u00f3xidos profundamente nos metais;<\/li>\n<li>A press\u00e3o subsequente suaviza as irregularidades, ocorre a deforma\u00e7\u00e3o pl\u00e1stica, uma liga\u00e7\u00e3o met\u00e1lica \u00e9 estabelecida em toda a superf\u00edcie de contato e a difus\u00e3o acelera, aumentando a confiabilidade e a resist\u00eancia da junta. Em alguns casos, ap\u00f3s a libera\u00e7\u00e3o da press\u00e3o, as pe\u00e7as soldadas permanecem na temperatura de soldagem para estabilizar os processos de cristaliza\u00e7\u00e3o.<\/li>\n<\/ul>\n<p><strong>Tecnologia de soldagem por difus\u00e3o <\/strong>Ao soldar metais homog\u00eaneos, n\u00e3o h\u00e1 linha divis\u00f3ria, e ao soldar metais diferentes, as zonas de uni\u00e3o s\u00e3o determinadas pelas diferen\u00e7as em suas estruturas. A superf\u00edcie \u00e9 cuidadosamente limpa para garantir uma boa liga\u00e7\u00e3o, de acordo com os graus 4 a 6. \u00c0s vezes, uma camada intermedi\u00e1ria, como p\u00f3 de n\u00edquel, \u00e9 usada para promover uma solda forte.<\/p>\n<p>S\u00e3o utilizados diferentes m\u00e9todos de aquecimento:<\/p>\n<ul>\n<li>radia\u00e7\u00e3o;<\/li>\n<li>indu\u00e7\u00e3o<\/li>\n<li>corrente de passagem;<\/li>\n<li>feixe de el\u00e9trons;<\/li>\n<li>descarga luminescente.<\/li>\n<\/ul>\n<p><strong>Tecnologia de soldagem por difus\u00e3o <\/strong>ocorre em duas etapas:<\/p>\n<ul>\n<li>\u00a0compress\u00e3o de superf\u00edcies met\u00e1licas;<\/li>\n<li>\u00a0o processo de forma\u00e7\u00e3o da estrutura de uma junta soldada.<\/li>\n<\/ul>\n<p>Vantagens deste tipo de soldagem:<\/p>\n<ul>\n<li>n\u00e3o requer soldas;<\/li>\n<li>n\u00e3o h\u00e1 necessidade de processamento mec\u00e2nico adicional;<\/li>\n<li>baixo consumo de energia.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" 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https:\/\/metallsmaster.pro\/wp-content\/uploads\/2019\/03\/\u0414\u0438\u0444\u0444\u0443\u0437\u0438\u043e\u043d\u043d\u0430\u044f-\u0441\u0432\u0430\u0440\u043a\u0430-\u0441\u0445\u0435\u043c\u0430-254x190.webp 254w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>Em 1953, foi desenvolvido um novo m\u00e9todo de uni\u00e3o de metais por soldagem \u2013 difus\u00e3o\u2026<\/p>","protected":false},"author":1,"featured_media":700,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-698","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-svarka-metallov"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 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