{"id":5061,"date":"2020-09-25T07:11:52","date_gmt":"2020-09-25T07:11:52","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=5061"},"modified":"2020-09-25T07:11:52","modified_gmt":"2020-09-25T07:11:52","slug":"flux-for-slag-removal","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/flux-for-slag-removal\/","title":{"rendered":"Fluxo para remo\u00e7\u00e3o de esc\u00f3ria"},"content":{"rendered":"

O fluxo para a remo\u00e7\u00e3o de esc\u00f3ria na liga de alum\u00ednio fundida atua principalmente por meio de tr\u00eas m\u00e9todos: adsor\u00e7\u00e3o, dissolu\u00e7\u00e3o e combina\u00e7\u00e3o. A dissolu\u00e7\u00e3o \u00e9 obtida principalmente pela adi\u00e7\u00e3o de uma subst\u00e2ncia qu\u00edmica ao fundente capaz de dissolver as inclus\u00f5es de esc\u00f3ria, o que ocorre devido \u00e0s suas propriedades f\u00edsico-qu\u00edmicas semelhantes; em seguida, elas s\u00e3o removidas juntamente com o fundente, como no caso do Na\u2083AlF\u2086, que dissolve o Al\u2082O\u2083. J\u00e1 a rea\u00e7\u00e3o qu\u00edmica ocorre por meio da rea\u00e7\u00e3o qu\u00edmica entre o fluxos<\/a> e a esc\u00f3ria para gerar outros compostos facilmente remov\u00edveis, a fim de atingir o objetivo da remo\u00e7\u00e3o, como o Na\u2082SiF\u2086, e o Al\u2082O\u2083 restante reagiu para produzir Na\u2083AlF\u2086 e AlF\u2083. Todos podem ser refinados por meio de outros mecanismos.<\/p>\n

Atualmente, as ligas de alto desempenho est\u00e3o evoluindo no sentido de especifica\u00e7\u00f5es de grandes dimens\u00f5es, e os requisitos de tamanho dos lingotes fundidos est\u00e3o aumentando gradualmente. O g\u00e1s residual, as impurezas, a esc\u00f3ria e os metais alcalinos e alcalino-terrosos presentes na massa fundida de liga de alum\u00ednio s\u00e3o prejudiciais \u00e0 deforma\u00e7\u00e3o durante o processamento dos lingotes fundidos e ao processo de opera\u00e7\u00e3o.<\/p>\n

\"Fluxo<\/p>\n

As inclus\u00f5es na massa fundida de alum\u00ednio incluem inclus\u00f5es s\u00f3lidas, como carbonetos, nitretos, \u00f3xidos, hidretos e boretos, al\u00e9m de inclus\u00f5es met\u00e1licas, como ferro, sil\u00edcio, zinco e mangan\u00eas. Entre elas, o Al\u2082O\u2083 \u00e9 o principal componente, representando 95% das inclus\u00f5es. O tamanho das inclus\u00f5es n\u00e3o met\u00e1licas na massa fundida de alum\u00ednio varia entre alguns e dezenas de m\u00edcrons, o que \u00e9 muito prejudicial. As inclus\u00f5es de \u00f3xidos n\u00e3o met\u00e1licos e a matriz dos materiais de liga de alum\u00ednio apresentam par\u00e2metros de desempenho diferentes, como m\u00f3dulo de elasticidade, dureza e coeficiente de expans\u00e3o. Sob a a\u00e7\u00e3o de uma for\u00e7a externa, \u00e9 prov\u00e1vel que ocorra concentra\u00e7\u00e3o de tens\u00e3o nos cantos agudos da fase de inclus\u00e3o oxidada, o que cortar\u00e1 a estrutura da matriz, far\u00e1 com que o produto apresente vazamentos ou fique sujeito \u00e0 corros\u00e3o, al\u00e9m de reduzir significativamente as propriedades mec\u00e2nicas e a resist\u00eancia \u00e0 corros\u00e3o sob tens\u00e3o. A presen\u00e7a de esc\u00f3ria tamb\u00e9m reduz a fluidez da liga e a capacidade de preenchimento do molde, al\u00e9m de aumentar a tend\u00eancia a defeitos de fundi\u00e7\u00e3o. Aumenta a tend\u00eancia de absor\u00e7\u00e3o de gases pelo alum\u00ednio fundido, bloqueia a difus\u00e3o e a precipita\u00e7\u00e3o de gases e promove a forma\u00e7\u00e3o de porosidade secund\u00e1ria e vazios durante o processo de tratamento t\u00e9rmico.<\/p>\n

A AdTech produz fundente para remo\u00e7\u00e3o de esc\u00f3ria. O agente de refino da AdTech utiliza uma tecnologia exclusiva para potencializar o efeito tradicional de desgaseifica\u00e7\u00e3o e forma\u00e7\u00e3o de esc\u00f3ria no metal fundido.<\/p>","protected":false},"excerpt":{"rendered":"

The flux for slag removal in the aluminum alloy melt mainly through three methods of adsorption, dissolution, and compounding. The dissolution is mainly achieved by…<\/p>","protected":false},"author":1,"featured_media":5150,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-5061","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nFlux for Slag Removal in Aluminum Alloy -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"The flux for slag removal in the aluminum alloy melt mainly through three methods of adsorption, dissolution and compounding.\" \/>\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\/flux-for-slag-removal\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Flux 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