{"id":8966,"date":"2021-05-27T08:43:57","date_gmt":"2021-05-27T08:43:57","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8966"},"modified":"2021-05-27T08:43:57","modified_gmt":"2021-05-27T08:43:57","slug":"european-foundries-ceramic-filters","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/european-foundries-ceramic-filters\/","title":{"rendered":"Fundi\u00e7\u00f5es Europeias de Filtros Cer\u00e2micos"},"content":{"rendered":"

Nas fundi\u00e7\u00f5es europeias, a maioria dos filtros de cer\u00e2mica espumosa \u00e9 utilizada para reduzir as inclus\u00f5es na liga de alum\u00ednio l\u00edquida. Esses filtros s\u00e3o leves, de alta resist\u00eancia e possuem grande abertura. Geralmente, a faixa de uso dos filtros de cer\u00e2mica em espuma \u00e9 de 10 a 30 PPI. A porosidade \u00e9 medida pelo n\u00famero de poros t\u00edpicos por polegada de comprimento do filtro. Um filtro de malha grossa, com um n\u00famero reduzido de orif\u00edcios por polegada, pode apresentar uma vaz\u00e3o maior sem uma zona cega mais longa.<\/p>\n

O uso eficaz dos filtros de espuma cer\u00e2mica da European Foundries pode melhorar as propriedades mec\u00e2nicas dos materiais de fundi\u00e7\u00e3o. A ductilidade (alongamento) apresentou uma melhora significativa.<\/p>\n

O metal filtrado com um filtro de espuma cer\u00e2mica para fundi\u00e7\u00e3o<\/a> tamb\u00e9m pode produzir pe\u00e7as fundidas com poucas altera\u00e7\u00f5es nas propriedades mec\u00e2nicas.<\/p>\n

\"Filtragem<\/p>\n

A raz\u00e3o para essas melhorias \u00e9 que as inclus\u00f5es podem causar fraturas e trincas por fadiga nas pe\u00e7as fundidas. A redu\u00e7\u00e3o do n\u00famero de inclus\u00f5es por meio do uso de filtros de espuma cer\u00e2mica diminuir\u00e1 o n\u00famero de pontos onde essas trincas podem se iniciar, melhorando assim as propriedades mec\u00e2nicas do metal fundido e reduzindo a propaga\u00e7\u00e3o dessas trincas.<\/p>\n

Durante a fus\u00e3o e o processamento do alum\u00ednio fundido, geralmente se forma uma pel\u00edcula na superf\u00edcie do metal fundido; essa pel\u00edcula \u00e9 composta principalmente por \u00f3xido de alum\u00ednio e\/ou componentes de sua liga e, \u00e0 medida que o metal fundido \u00e9 derretido, ela se decomp\u00f5e e se dispersa, sendo transferida para a concha ou o molde durante a agita\u00e7\u00e3o.<\/p>\n

Al\u00e9m disso, podem existir part\u00edculas provenientes da superf\u00edcie do metal s\u00f3lido carregado no forno, ou podem haver part\u00edculas refrat\u00e1rias se desprendendo do revestimento do forno ou do tanque de transporte. Embora seja necess\u00e1rio tomar extremo cuidado durante a sinteriza\u00e7\u00e3o e a desengraxagem do metal fundido, alguns s\u00f3lidos n\u00e3o met\u00e1licos finamente divididos permanecem no metal solidificado. Embora tais impurezas n\u00e3o met\u00e1licas sejam inofensivas em algumas pe\u00e7as fundidas, elas s\u00e3o indesej\u00e1veis em outras, especialmente quando impedem a obten\u00e7\u00e3o de um acabamento fino ou atuam como n\u00facleo para a forma\u00e7\u00e3o de vazios cheios de g\u00e1s.<\/p>","protected":false},"excerpt":{"rendered":"

In European foundries, most foam ceramic foundry filters are used to reduce inclusions in the liquid aluminum alloy. These filters are light in weight, high…<\/p>","protected":false},"author":1,"featured_media":8967,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-8966","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nEuropean Foundries Ceramic Filters for Molten Metal Filtration<\/title>\n<meta name=\"description\" content=\"Most European foundries use foam ceramic foam filters are used to reduce inclusions in molten aluminum, improve the mechanical properties.\" \/>\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.alalloycasting.com\/pt\/european-foundries-ceramic-filters\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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