{"id":80,"date":"2017-12-26T09:46:51","date_gmt":"2017-12-26T06:46:51","guid":{"rendered":"https:\/\/metallsmaster.ru\/?p=80"},"modified":"2020-11-02T12:09:14","modified_gmt":"2020-11-02T09:09:14","slug":"chugun-s-sharovidnym-grafitom","status":"publish","type":"post","link":"https:\/\/metallsmaster.pro\/pt\/ferro-fundido-nodular\/","title":{"rendered":"Ferro fundido nodular"},"content":{"rendered":"<p><strong>Ferro fundido nodular <\/strong>\u00c9 um material estrutural de alta resist\u00eancia com excelentes caracter\u00edsticas de desempenho. O magn\u00e9sio \u00e9 adicionado durante o processo de fus\u00e3o, resultando em uma grafite fundida que n\u00e3o tem a forma de flocos, mas sim uma forma esf\u00e9rica quase perfeita. O resultado <strong>ferro fundido nodular<\/strong> Ele tem qualidades melhores que o cinza e pode desafiar o a\u00e7o quando comparado em algumas propriedades.<\/p>\n<p>O processo de fundi\u00e7\u00e3o de ligas \u00e9 bastante simples. Talvez o m\u00e9todo mais comum para produzir esse tipo de ferro fundido seja o processo de magn\u00e9sio. A tecnologia envolve a adi\u00e7\u00e3o de ligas de magn\u00e9sio e v\u00e1rios modificadores complexos contendo magn\u00e9sio ao magn\u00e9sio met\u00e1lico fundido. Propriedades <strong>ferro fundido de grafite esferoidal <\/strong>Os diversos tipos de materiais de fundi\u00e7\u00e3o s\u00e3o variados, mas se destacam pela excelente combina\u00e7\u00e3o de propriedades de fundi\u00e7\u00e3o e alta resist\u00eancia. Este material \u00e9 altamente d\u00factil, o que o torna f\u00e1cil de usinar. \u00c9 bastante resistente a cargas vari\u00e1veis e apresenta baixa sensibilidade a concentradores de tens\u00e3o. A estrutura met\u00e1lica da base pode ser ferr\u00edtica ou perl\u00edtica. Os materiais ferr\u00edticos podem conter at\u00e9 20% de inclus\u00f5es de perlita, enquanto os perl\u00edticos podem conter at\u00e9 20% de ferrita.<\/p>\n<h2>\n\t<!--<div class='top-banner-pages'>\t\n\n\t<\/div>--->\n\t<\/h2>\n<h2>Graus de ferro fundido nodular<\/h2>\n<p>A tecnologia de marca\u00e7\u00e3o para ferros fundidos de grafite esferoidal segue uma norma GOST espec\u00edfica e utiliza designa\u00e7\u00f5es alfab\u00e9ticas e num\u00e9ricas. Por exemplo, a marca\u00e7\u00e3o &quot;\u0412\u0427&quot; indica ferro fundido de alta resist\u00eancia, seguida por n\u00fameros que indicam a resist\u00eancia \u00e0 tra\u00e7\u00e3o. Os dados s\u00e3o fornecidos em MPa; para obter o valor total, o valor especificado deve ser multiplicado por 10.<\/p>\n<p>O s\u00edmbolo pode ser assim: \u0412\u042750 GOST 7293-85, o n\u00famero 50 indica a resist\u00eancia \u00e0 tra\u00e7\u00e3o de 500 MPa, \u0412\u042745 - resist\u00eancia \u00e0 tra\u00e7\u00e3o de 450 MPa, \u0412\u042780 - resist\u00eancia \u00e0 tra\u00e7\u00e3o de 800 MPa, etc. O listado\u00a0 <strong>graus de ferro fundido de grafite esferoidal<\/strong> \u00c9 f\u00e1cil de cortar, derrete em temperaturas mais baixas e tem excelentes propriedades mec\u00e2nicas e de fundi\u00e7\u00e3o, apenas um pouco piores que o a\u00e7o. <strong>Graus de ferro fundido nodular <\/strong>\u0412\u0427100-4-3, \u0412\u0427110-6-5 t\u00eam uma resist\u00eancia \u00e0 tra\u00e7\u00e3o de 100-120 kgf\/mm<sup>2<\/sup> De acordo com a norma GOST 7293-70, esses graus s\u00e3o utilizados na fundi\u00e7\u00e3o de virabrequins, camisas de cilindro, eixos de comando de v\u00e1lvulas e outros componentes sujeitos a cargas elevadas. Os graus de alta resist\u00eancia VCh80 e 100 podem ser obtidos por microliga\u00e7\u00e3o seguida de normaliza\u00e7\u00e3o da fundi\u00e7\u00e3o.<\/p>\n<h3>\n<!---<div class='top-banner-pages'>\n\n<\/div>-->\n\n\t<\/h3>\n<h3>Ferro fundido de alta resist\u00eancia com grafite esferoidal<\/h3>\n<p>Gra\u00e7as ao fato de que <strong>ferro d\u00factil com grafite nodular<\/strong> A liga possui inclus\u00f5es de grafite nodulares em vez de lamelares e \u00e9 caracterizada por alta resist\u00eancia mec\u00e2nica, resist\u00eancia ao desgaste e boas propriedades mec\u00e2nicas e de fundi\u00e7\u00e3o. Devido a isso, <strong>ferro d\u00factil com grafite nodular <\/strong>Ele \u00e9 usado com muito sucesso na produ\u00e7\u00e3o de pe\u00e7as cr\u00edticas em engenharia mec\u00e2nica \u2013 virabrequins e eixos de comando, pist\u00f5es de motores a diesel, balancins de v\u00e1lvulas, diversas pe\u00e7as de embreagem e outras estruturas que operam sob cargas altas e variadas.<\/p>\n<p>Os seguintes graus s\u00e3o utilizados para fundi\u00e7\u00e3o: VCh35, VCh40, VCh45, VCh50, VCh60, VCh70, VCh80 e VCh100. Tamb\u00e9m \u00e9 utilizado na fabrica\u00e7\u00e3o de tubos de alta resist\u00eancia para abastecimento de \u00e1gua, bem como gasodutos e oleodutos. Os tubos feitos com este material s\u00e3o bastante resistentes, dur\u00e1veis e caracterizados por excelentes propriedades de desempenho. De acordo com suas caracter\u00edsticas <strong>ferro d\u00factil com grafite nodular <\/strong>corresponde quase completamente ao ferro fundido de grafite esferoidal.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-81 aligncenter\" src=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2017\/12\/M_4955233-0-300x282.webp\" alt=\"Pist\u00e3o diesel de ferro fundido nodular\" width=\"300\" height=\"282\" srcset=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2017\/12\/M_4955233-0-300x282.webp 300w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2017\/12\/M_4955233-0-202x190.webp 202w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2017\/12\/M_4955233-0.webp 514w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-82 aligncenter\" src=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2017\/12\/camshaft_8v_kl_n1-300x154.webp\" alt=\"eixo de comando de ferro fundido\" width=\"300\" height=\"154\" srcset=\"https:\/\/metallsmaster.pro\/wp-content\/uploads\/2017\/12\/camshaft_8v_kl_n1-300x154.webp 300w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2017\/12\/camshaft_8v_kl_n1-768x395.webp 768w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2017\/12\/camshaft_8v_kl_n1.webp 1024w, https:\/\/metallsmaster.pro\/wp-content\/uploads\/2017\/12\/camshaft_8v_kl_n1-254x131.webp 254w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>O ferro fundido nodular \u00e9 um material estrutural de alta resist\u00eancia com caracter\u00edsticas de desempenho muito boas\u2026.<\/p>","protected":false},"author":1,"featured_media":81,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-80","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-metalls"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0427\u0443\u0433\u0443\u043d \u0441 \u0448\u0430\u0440\u043e\u0432\u0438\u0434\u043d\u044b\u043c \u0433\u0440\u0430\u0444\u0438\u0442\u043e\u043c, \u043c\u0430\u0440\u043a\u0438\u0440\u043e\u0432\u043a\u0430, \u043c\u0435\u0442\u043e\u0434\u044b \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0438 \u0441\u0444\u0435\u0440\u044b \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" 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