{"id":426,"date":"2019-01-15T18:15:47","date_gmt":"2019-01-15T15:15:47","guid":{"rendered":"https:\/\/metallsmaster.ru\/?p=426"},"modified":"2020-11-02T11:44:46","modified_gmt":"2020-11-02T08:44:46","slug":"diffuzionnaya-pajka","status":"publish","type":"post","link":"https:\/\/metallsmaster.pro\/pt\/soldagem-por-difusao\/","title":{"rendered":"Soldagem por difus\u00e3o"},"content":{"rendered":"<p>A t\u00e9cnica de soldagem de metais \u00e9 conhecida h\u00e1 muito tempo. Sua ess\u00eancia reside na uni\u00e3o de metais com solda derretida. Um tipo de soldagem \u00e9 <strong>soldagem por difus\u00e3o. <\/strong>\u00c9 usado para criar juntas que operam em altas temperaturas. Este tipo de soldagem ocorre por meio da difus\u00e3o m\u00fatua do metal base e da solda a uma temperatura acima do ponto de fus\u00e3o da solda. Isso \u00e9 obtido por meio de um sistema de v\u00e1cuo no qual a pe\u00e7a \u00e9 mantida por um per\u00edodo de tempo especificado. <strong>Soldagem por difus\u00e3o<\/strong> Ela \u00e9 realizada sem qualquer influ\u00eancia qu\u00edmica e a capilaridade \u00e9 a principal caracter\u00edstica da soldagem.<\/p>\n<h2>Tecnologia de soldagem por difus\u00e3o<\/h2>\n\n\t<!--<div class='top-banner-pages'>\t\n\n\t<\/div>--->\n\t\n<p>Durante a soldagem por difus\u00e3o, ocorre uma troca molecular entre os metais a serem unidos. Isso requer a cria\u00e7\u00e3o de condi\u00e7\u00f5es adequadas para obter uma liga\u00e7\u00e3o forte. <strong>Tecnologia de soldagem por difus\u00e3o<\/strong> Ocorre em uma c\u00e2mara de v\u00e1cuo, onde a temperatura \u00e9 elevada acima do ponto de fus\u00e3o da solda. O processo \u00e9 realizado da seguinte forma:<\/p>\n<ol>\n<li>As superf\u00edcies das pe\u00e7as a serem unidas s\u00e3o cuidadosamente limpas para remover \u00f3xidos. A menor contamina\u00e7\u00e3o interfere significativamente no processo de soldagem por difus\u00e3o;<\/li>\n<li>As pe\u00e7as s\u00e3o colocadas em uma unidade de v\u00e1cuo. Isso protege os metais da oxida\u00e7\u00e3o durante o processo de fabrica\u00e7\u00e3o;<\/li>\n<li>Solda e uma fina camada de certos metais s\u00e3o aplicadas entre as superf\u00edcies das pe\u00e7as para formar a liga\u00e7\u00e3o. A escolha do metal usado como agente de liga\u00e7\u00e3o e solda depende das propriedades do metal a ser soldado. Prata, ouro e cobre s\u00e3o comumente usados. Um agente de liga\u00e7\u00e3o intermedi\u00e1rio pode ser criado por deposi\u00e7\u00e3o eletrol\u00edtica na superf\u00edcie da pe\u00e7a.<\/li>\n<li>Folha de colagem, 0,01 mm de espessura.<\/li>\n<li>Uma press\u00e3o espec\u00edfica \u00e9 criada para reproduzir os processos de difus\u00e3o. A press\u00e3o depende do tipo de pe\u00e7a e do material da liga\u00e7\u00e3o intermedi\u00e1ria. O aquecimento ocorre ent\u00e3o, permitindo que o processo de difus\u00e3o conclua o processo de soldagem.<\/li>\n<li>Tal <strong>tecnologia de soldagem por difus\u00e3o<\/strong> Permite conex\u00f5es de alta qualidade. Soldas e fluxos s\u00e3o elementos-chave da soldagem por difus\u00e3o.<\/li>\n<\/ol>\n<h3>Soldas<\/h3>\n\n<!---<div class='top-banner-pages'>\n\n<\/div>-->\n\n\t\n<p>A escolha da solda para uma conex\u00e3o forte depende da resist\u00eancia mec\u00e2nica dos componentes, da sua resist\u00eancia qu\u00edmica e da sua capacidade de molhar e fluir durante a soldagem. Os requisitos da solda incluem:<\/p>\n<ul>\n<li>Deve ser herm\u00e9tico e dur\u00e1vel;<\/li>\n<li>Boa fluidez quando aquecido;<\/li>\n<li>A temperatura de fus\u00e3o \u00e9 menor que a da pe\u00e7a soldada;<\/li>\n<li>Tenha boa condutividade el\u00e9trica se os produtos conectados estiverem relacionados a ela.<\/li>\n<\/ul>\n<h4>Fluxos<\/h4>\n<p>Eles n\u00e3o devem reagir quimicamente com a solda. O ponto de fus\u00e3o do fluxo deve ser inferior ao da solda. Quando aquecido, o fluxo promove uma boa molhagem da superf\u00edcie met\u00e1lica e da solda. Os fluxos s\u00e3o classificados:<\/p>\n<ul>\n<li>De acordo com a faixa de temperatura de soldagem;<\/li>\n<li>Pela natureza do solvente. Existem aquosos e n\u00e3o aquosos;<\/li>\n<li>Pela natureza do ativador. Os mais comuns: fluoroborato, anilina, colof\u00f4nia, \u00e1cido, etc.;<\/li>\n<li>Por estado de agrega\u00e7\u00e3o. Existem formas pastosas, l\u00edquidas e s\u00f3lidas.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-427 size-full aligncenter\" src=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2019\/01\/\u0414\u0438\u0444\u0444\u0443\u0437\u0438\u043e\u043d\u043d\u0430\u044f-\u043f\u0430\u0439\u043a\u0430.webp\" alt=\"\" width=\"230\" height=\"216\" srcset=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2019\/01\/\u0414\u0438\u0444\u0444\u0443\u0437\u0438\u043e\u043d\u043d\u0430\u044f-\u043f\u0430\u0439\u043a\u0430.webp 230w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2019\/01\/\u0414\u0438\u0444\u0444\u0443\u0437\u0438\u043e\u043d\u043d\u0430\u044f-\u043f\u0430\u0439\u043a\u0430-202x190.webp 202w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>A t\u00e9cnica de soldagem de metais existe h\u00e1 muito tempo. Sua ess\u00eancia reside na uni\u00e3o de metais com solda derretida...<\/p>","protected":false},"author":1,"featured_media":427,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-426","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pajka-metallov"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0414\u0438\u0444\u0444\u0443\u0437\u0438\u043e\u043d\u043d\u0430\u044f \u043f\u0430\u0439\u043a\u0430, \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f, \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u0438 \u0438 \u0442\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u0430\" \/>\n\t<meta name=\"robots\" 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