{"id":193,"date":"2018-01-09T22:05:42","date_gmt":"2018-01-09T19:05:42","guid":{"rendered":"https:\/\/metallsmaster.ru\/?p=193"},"modified":"2020-11-02T11:55:17","modified_gmt":"2020-11-02T08:55:17","slug":"elektrodugovaya-svarka-neplavyashhimsya-elektrodom","status":"publish","type":"post","link":"https:\/\/metallsmaster.pro\/pt\/soldagem-a-arco-nao-consumivel\/","title":{"rendered":"Soldagem a arco de eletrodo n\u00e3o consum\u00edvel"},"content":{"rendered":"<p><strong>Soldagem a arco<\/strong> Este \u00e9 um processo cl\u00e1ssico de soldagem de metais que utiliza um arco el\u00e9trico para aquecer e derreter a superf\u00edcie met\u00e1lica. A temperatura do arco \u00e9 alta o suficiente, at\u00e9 7000 <sup>\u00b0<\/sup> C, para fundir metais de dureza vari\u00e1vel. J\u00e1 em 1802, cientistas descobriram o fen\u00f4meno do arco el\u00e9trico de alta temperatura. E em 1882, o cientista N.N. Benardos inventou e patenteou a soldagem el\u00e9trica, usando um eletrodo de carbono. <strong>Soldagem a arco<\/strong> Existem dois tipos de soldagem: um com eletrodo consum\u00edvel e outro com eletrodo n\u00e3o consum\u00edvel. O m\u00e9todo n\u00e3o consum\u00edvel utiliza um material resistente \u00e0 temperatura. Materiais adequados para essa finalidade incluem eletrodos de tungst\u00eanio, carbono ou grafite.<\/p>\n<h2>Princ\u00edpios b\u00e1sicos da soldagem a arco el\u00e9trico com eletrodo n\u00e3o consum\u00edvel<\/h2>\n<p><strong>\n\t<!--<div class='top-banner-pages'>\t\n\n\t<\/div>--->\n\t<\/strong><\/p>\n<p><strong>Soldagem a arco de eletrodo n\u00e3o consum\u00edvel <\/strong>Isso permite manter alta estabilidade do arco, independentemente do tipo de corrente. Al\u00e9m disso, ajustando a taxa de alimenta\u00e7\u00e3o e o \u00e2ngulo do eletrodo, e selecionando o tipo de arame de enchimento, \u00e9 poss\u00edvel alterar a composi\u00e7\u00e3o qu\u00edmica da solda e seus par\u00e2metros geom\u00e9tricos. <strong>Soldagem a arco de eletrodo n\u00e3o consum\u00edvel<\/strong> Possui uma ampla gama de aplica\u00e7\u00f5es para soldagem de diversos metais. Solda com sucesso:<\/p>\n<ul>\n<li>a\u00e7os carbono, baixa liga e alta liga;<\/li>\n<li>a\u00e7os e ligas resistentes ao calor;<\/li>\n<li>metais n\u00e3o ferrosos e suas ligas.<\/li>\n<\/ul>\n<p>As tecnologias de soldagem para diferentes tipos de metal variam em suas especificidades, mas os par\u00e2metros b\u00e1sicos s\u00e3o semelhantes. Por exemplo, a tecnologia para soldagem de a\u00e7o carbono e a\u00e7o de baixa liga:<\/p>\n<ul>\n<li>A pe\u00e7a de trabalho \u00e9 completamente limpa de incrusta\u00e7\u00f5es, ferrugem e sujeira. Isso garante um bom contato entre o eletrodo e a superf\u00edcie met\u00e1lica a ser soldada;<\/li>\n<li>Os par\u00e2metros de corrente s\u00e3o selecionados. Normalmente, utiliza-se corrente cont\u00ednua com polaridade direta. O eletrodo \u00e9 o terminal negativo e a pe\u00e7a de trabalho \u00e9 o terminal positivo. A tens\u00e3o \u00e9 calculada para 1 mm de di\u00e2metro do eletrodo de tungst\u00eanio, com uma tens\u00e3o de 30\u201335 A. O arco de soldagem deve ser curto. Isso promove uma penetra\u00e7\u00e3o profunda.<\/li>\n<li>A soldagem \u00e9 realizada com o \u00e2ngulo voltado para a frente. Os a\u00e7os de grau 10 e 20 s\u00e3o soldados apenas com arame de adi\u00e7\u00e3o, caso contr\u00e1rio, a solda pode se tornar porosa. Para evitar respingos de metal de adi\u00e7\u00e3o e oxida\u00e7\u00e3o da ponta do arame, evite movimentos bruscos do arame.<\/li>\n<\/ul>\n<h3>\n<!---<div class='top-banner-pages'>\n\n<\/div>-->\n\n\t<\/h3>\n<h3>Eletrodo de carbono<\/h3>\n<p>Ao soldar com esse eletrodo, forma-se um ambiente protetor pela queima e subsequente evapora\u00e7\u00e3o do eletrodo. Cria-se uma atmosfera \u00fanica contendo CO.<sub>2<\/sub>, CO e vapor de carbono. No entanto, para soldar pe\u00e7as cr\u00edticas, meios adicionais s\u00e3o utilizados para melhorar a prote\u00e7\u00e3o gasosa do metal a ser soldado. A soldagem com eletrodo de carbono \u00e9 utilizada para revestimento e soldagem de: a\u00e7o, ferro fundido, ligas duras e metais n\u00e3o ferrosos.<\/p>\n<h4>Eletrodo de tungst\u00eanio<\/h4>\n<p>Eletrodos de tungst\u00eanio s\u00e3o mais comumente utilizados do que eletrodos de carbono. S\u00e3o bastante resistentes ao desgaste. O consumo de eletrodos \u00e9 de 1 a 2 cm por hora de arco. Para evitar a oxida\u00e7\u00e3o r\u00e1pida dos eletrodos, eles operam em um g\u00e1s de prote\u00e7\u00e3o. H\u00e9lio e arg\u00f4nio s\u00e3o usados para essa finalidade; eles n\u00e3o reagem com o tungst\u00eanio. Este eletrodo pode unir com efic\u00e1cia chapas met\u00e1licas de at\u00e9 6 mm de espessura, bem como chapas muito finas (menos de 0,1 mm). A costura de solda \u00e9 limpa. <strong>Soldagem a arco de eletrodo n\u00e3o consum\u00edvel <\/strong>permite soldagem de alta qualidade de pe\u00e7as feitas de metais altamente ativos e refrat\u00e1rios.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-195 size-full aligncenter\" src=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/image330.webp\" alt=\"Soldagem a arco de carbono\" width=\"280\" height=\"172\" srcset=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/image330.webp 280w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/image330-254x156.webp 254w\" sizes=\"auto, (max-width: 280px) 100vw, 280px\" \/><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-194 size-full aligncenter\" src=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/GTAW-ru.webp\" alt=\"Soldagem a arco de eletrodo n\u00e3o consum\u00edvel\" width=\"625\" height=\"350\" srcset=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/GTAW-ru.webp 625w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/GTAW-ru-300x168.webp 300w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2018\/01\/GTAW-ru-254x142.webp 254w\" sizes=\"auto, (max-width: 625px) 100vw, 625px\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>A soldagem a arco \u00e9 um m\u00e9todo cl\u00e1ssico de soldagem de metais, que usa um processo especial chamado soldagem a arco para aquecer a superf\u00edcie do metal e derret\u00ea-la\u2026<\/p>","protected":false},"author":1,"featured_media":194,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-193","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 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