{"id":9356,"date":"2021-06-27T06:45:18","date_gmt":"2021-06-27T06:45:18","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=9356"},"modified":"2021-06-25T06:51:51","modified_gmt":"2021-06-25T06:51:51","slug":"casting-filters","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/casting-filters\/","title":{"rendered":"Filtros de fundi\u00e7\u00e3o"},"content":{"rendered":"<p>Os filtros de fundi\u00e7\u00e3o podem remover com efic\u00e1cia as inclus\u00f5es do alum\u00ednio fundido, melhorar a estrutura da pe\u00e7a fundida, aprimorar o desempenho do processo, reduzir os custos de produ\u00e7\u00e3o e melhorar a taxa de qualifica\u00e7\u00e3o do produto e suas propriedades mec\u00e2nicas.<\/p>\n<p>Os filtros de fundi\u00e7\u00e3o n\u00e3o s\u00f3 removem com efic\u00e1cia as grandes impurezas heterog\u00eaneas do alum\u00ednio l\u00edquido, como tamb\u00e9m filtram as microinclus\u00f5es que n\u00e3o podem ser removidas por processos tradicionais. Como os \u00e1tomos de hidrog\u00eanio e outros \u00edons nocivos presentes no alum\u00ednio l\u00edquido costumam ser adsorvidos nas inclus\u00f5es, estas podem se tornar o n\u00facleo da forma\u00e7\u00e3o de bolhas; assim, \u00e9 poss\u00edvel reduzir a presen\u00e7a de gases nocivos no alum\u00ednio l\u00edquido ao filtrar as inclus\u00f5es.<\/p>\n<p>Os defeitos de inclus\u00e3o de esc\u00f3ria no processo de fundi\u00e7\u00e3o de lingotes e barras de alum\u00ednio afetam significativamente a efici\u00eancia produtiva e os benef\u00edcios econ\u00f4micos das f\u00e1bricas de lingotes e barras de alum\u00ednio. As inclus\u00f5es grossas na superf\u00edcie prejudicam o acabamento da pe\u00e7a fundida e podem at\u00e9 levar \u00e0 sua descarte direto. Defeitos de inclus\u00e3o subcut\u00e2neos geralmente s\u00e3o detectados apenas na etapa de processamento, na etapa de montagem ou na etapa de uso efetivo. Por exemplo, na oficina de usinagem, a presen\u00e7a de inclus\u00f5es macro ou micro reduz a usinabilidade das pe\u00e7as fundidas e a vida \u00fatil das ferramentas de usinagem.<\/p>\n<p>As inclus\u00f5es no processo de montagem ou uso reduzem as propriedades mec\u00e2nicas ou o desempenho em servi\u00e7o das pe\u00e7as fundidas, como, por exemplo, vazamentos sob press\u00e3o. As pe\u00e7as fundidas descartadas durante o processo de usinagem, montagem ou uso geralmente causam perdas maiores, pois muitas opera\u00e7\u00f5es j\u00e1 foram realizadas anteriormente.<\/p>\n<p>O PPI \u00e9 comumente utilizado para representar o tamanho dos poros de <a href=\"http:\/\/www.alalloycasting.com\/pt\/foundry-foam-ceramic-filters\/\">filtros de cer\u00e2mica com espuma<\/a>. Um PPI diferente e uma espessura diferente da placa filtrante produzem efeitos de filtragem distintos sobre as part\u00edculas. Quanto maior for o PPI e quanto maior for a espessura, melhor ser\u00e1 o efeito de filtragem.<\/p>\n<p>Geralmente, a espessura da placa de filtro padr\u00e3o \u00e9 de 50 mm. Se for muito espessa, a velocidade de fus\u00e3o diminuir\u00e1, e o tamanho da forja do filtro cer\u00e2mico dever\u00e1 ser aumentado para atingir uma determinada vaz\u00e3o. Quando a espessura \u00e9 fixa, a capacidade de reten\u00e7\u00e3o de part\u00edculas, especialmente as pequenas com menos de 20 m, varia de acordo com o PPI.<\/p>","protected":false},"excerpt":{"rendered":"<p>Casting filters can effectively remove inclusions in molten aluminum, improve casting structure, improve processing performance, reduce processing cost, and improve product qualification rate and mechanical&hellip;<\/p>","protected":false},"author":1,"featured_media":9357,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-9356","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Casting Filters, Ceramic Foam Filter for Casting -sales@alalloycasting.com<\/title>\n<meta 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