{"id":2733,"date":"2020-07-11T06:09:51","date_gmt":"2020-07-11T06:09:51","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=2733"},"modified":"2020-10-14T07:12:53","modified_gmt":"2020-10-14T07:12:53","slug":"metal-additives","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/metal-additives\/","title":{"rendered":"Aditivos met\u00e1licos"},"content":{"rendered":"

Casi el 85% del aluminio total consumido se presenta en forma de aleaciones de aluminio. Al fundir aleaciones de aluminio, es necesario a\u00f1adir diversos aditivos met\u00e1licos para obtener aleaciones con diferentes composiciones y propiedades que satisfagan distintos requisitos de rendimiento. Los elementos m\u00e1s utilizados son el silicio, el hierro, el cobre, el manganeso, el titanio, el magnesio, el cromo, el esta\u00f1o, el boro y las tierras raras, entre otros. En el caso de los aditivos de aleaci\u00f3n con bajo punto de fusi\u00f3n y alta solubilidad en el aluminio, como el magnesio y el zinc, se a\u00f1aden principalmente en forma de metal puro. Los metales con puntos de fusi\u00f3n m\u00e1s elevados, como el silicio, el hierro y el manganeso, se a\u00f1aden en forma de aleaciones intermedias. Sin embargo, el consumo de energ\u00eda en la producci\u00f3n de aleaciones intermedias es muy elevado; adem\u00e1s, especialmente en el proceso de preparaci\u00f3n de las aleaciones de aluminio, aumenta la p\u00e9rdida de elementos de aleaci\u00f3n y el volumen de residuos es extremadamente elevado.<\/p>\n

Aditivos para aleaciones de aluminio<\/h2>\n

Aditivos para aleaciones de aluminio<\/a> Puede alcanzar una elevada tasa de absorci\u00f3n a una temperatura relativamente baja (710-720 \u00b0C), y la velocidad de disoluci\u00f3n es r\u00e1pida. La criolita pot\u00e1sica a\u00f1adida no solo favorece la absorci\u00f3n de los elementos de aleaci\u00f3n, sino que tambi\u00e9n contribuye a la eliminaci\u00f3n de escorias. La adici\u00f3n de fluorosilicato de potasio no solo ampl\u00eda el bloque de aditivos, sino que tambi\u00e9n libera gas protector, lo que favorece la desgasificaci\u00f3n del aluminio fundido y mejora a\u00fan m\u00e1s su pureza. Por lo tanto, el aditivo para aleaciones de aluminio presenta una elevada tasa de absorci\u00f3n y estabilidad, y al mismo tiempo posee la capacidad de purificar la masa fundida mediante la desgasificaci\u00f3n y la eliminaci\u00f3n de escorias.<\/p>\n

Los aditivos de la aleaci\u00f3n de aluminio incluyen los siguientes componentes en porcentaje en peso: polvo met\u00e1lico 70-90%; criolita de potasio 5-20%; fluorosilicato de potasio 0-5%; sal de \u00e1cidos grasos superiores 0-5%, en los que la pureza del polvo met\u00e1lico es superior o igual al 99,5 %, y el tama\u00f1o de las part\u00edculas es de 70-120 mesh.<\/p>\n

\"Aditivos<\/p>\n

Aditivos met\u00e1licos para aleaciones de aluminio<\/h2>\n

El polvo met\u00e1lico tiene un tama\u00f1o de part\u00edcula m\u00e1s fino y una mayor pureza, y puede reaccionar con el aluminio l\u00edquido en la termita para favorecer su absorci\u00f3n. La criolita de potasio tiene un punto de fusi\u00f3n bajo y puede licuarse r\u00e1pidamente a la temperatura de adici\u00f3n (710-760 \u00b0C), disolviendo la superficie del polvo met\u00e1lico y la pel\u00edcula de \u00f3xido de aluminio para favorecer la absorci\u00f3n. El fluorosilicato de potasio, en su funci\u00f3n de agente de volumen e iniciador, se expande r\u00e1pidamente a la temperatura de adici\u00f3n, lo que ayuda a que el aluminio l\u00edquido penetre en el interior del bloque de aditivo. Adem\u00e1s, favorece la reacci\u00f3n de termita entre el polvo met\u00e1lico y el aluminio l\u00edquido, y mejora el rendimiento real de los elementos de aleaci\u00f3n. Al mismo tiempo, el aditivo de aleaci\u00f3n de aluminio se descompone, liberando gas protector, lo que hace que el aditivo flote hacia arriba y hacia abajo, ralentizando la velocidad de sedimentaci\u00f3n, y la velocidad de disoluci\u00f3n del elemento de aleaci\u00f3n se multiplica por m\u00e1s de 1. La sal de \u00e1cido graso superior se utiliza principalmente para la cohesi\u00f3n, lo que resulta conveniente para la briquetizaci\u00f3n.<\/p>\n

Caracter\u00edsticas de los aditivos met\u00e1licos<\/h2>\n

1. La tasa de absorci\u00f3n es estable y elevada.
\n2. La criolita pot\u00e1sica presente en los aditivos tiene la capacidad de eliminar la escoria. El fluorosilicato pot\u00e1sico se descompone para liberar un gas protector con capacidad desgasificadora, por lo que este aditivo tambi\u00e9n favorece la purificaci\u00f3n de la masa fundida.<\/p>","protected":false},"excerpt":{"rendered":"

Nearly 85% of the total aluminum consumed is in the form of aluminum alloys. When smelting aluminum alloy, various metal additives need to be added…<\/p>","protected":false},"author":1,"featured_media":5539,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[829,828],"class_list":["post-2733","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-aluminum-alloy-additives","tag-metal-additives-for-aluminum-alloy"],"yoast_head":"\nMetal Additives for Aluminum Alloy,Aluminum Alloy Additives<\/title>\n<meta name=\"description\" content=\"When smelting aluminum alloy, various metal additives need to be added to make the aluminum alloy meet the performance requirements.\" \/>\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\/es\/metal-additives\/\" \/>\n<meta property=\"og:locale\" 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