{"id":4985,"date":"2020-09-24T06:36:46","date_gmt":"2020-09-24T06:36:46","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=4985"},"modified":"2020-09-24T06:43:12","modified_gmt":"2020-09-24T06:43:12","slug":"bright-bars","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/bright-bars\/","title":{"rendered":"Barras brillantes"},"content":{"rendered":"

Las barras brillantes se deben principalmente a impurezas met\u00e1licas y no met\u00e1licas que han entrado en la boquilla y se han quedado en la parte delantera de la misma durante la formaci\u00f3n de la placa vertical, o bien, durante el proceso de producci\u00f3n, a la baja temperatura de la caja de entrada, al bajo nivel de l\u00edquido del canal de vertido, y la baja velocidad de desplazamiento de la escoria, el aluminio fundido se solidifica en el borde delantero de la boca, lo que provoca un bloqueo local que dificulta el flujo normal del aluminio fundido.<\/p>\n

Una vez que aparece una franja brillante en alg\u00fan punto durante el proceso de colada y laminaci\u00f3n, esta se mantendr\u00e1 hasta el final del mismo, sin interrupciones intermedias, y su posici\u00f3n no variar\u00e1. No es dif\u00edcil detectar las franjas brillantes provocadas por un bloqueo durante la producci\u00f3n, y se formar\u00e1n rayas sim\u00e9tricas en las superficies superior e inferior de la banda. La formaci\u00f3n de franjas brillantes y de segregaci\u00f3n en la superficie de la placa es justo lo contrario. Debido a que el aluminio l\u00edquido se obstruye y se solidifica en la parte delantera de la boquilla, lo que dificulta el flujo normal del aluminio fundido, el metal fundido de ambos lados acaba entrando en contacto con los rodillos y no puede obtener los granos equiaxiales finos en la superficie. Tras un grabado con \u00e1cido de alta concentraci\u00f3n, se puede observar que los granos locales est\u00e1n alineados. Este tipo de defecto en forma de rayas no puede eliminarse en el procesamiento posterior de laminaci\u00f3n en fr\u00edo. Solo puede evitarse aumentando la temperatura de la caja delantera y el nivel de l\u00edquido del canal en la fase inicial de la formaci\u00f3n de las rayas. Medidas como ajustar la velocidad de laminaci\u00f3n para eliminar la obstrucci\u00f3n.<\/p>\n

\"\"<\/p>\n

Medidas de tratamiento de Bright Bars<\/strong><\/p>\n

(1) La caja delantera y la boquilla de fundici\u00f3n<\/a> La placa del ventilador debe estar completamente seca antes de su uso. La boquilla de fundici\u00f3n debe introducirse en un horno durante 30 minutos o mantenerse a 150 \u00b0C en el horno durante m\u00e1s de 1 hora antes de colocarla en la estanter\u00eda. Antes de la descarga, utilice la pistola pulverizadora de gas licuado (gas natural) para calentar durante aproximadamente 1 minuto, con el fin de evitar que la boquilla explote y provoque una obstrucci\u00f3n.<\/p>\n

(2) Controlar la temperatura de la caja delantera, el nivel de l\u00edquido del canal de vertido y la altura del nivel de l\u00edquido de la caja delantera, as\u00ed como la velocidad de la cinta de colada y laminaci\u00f3n. Si se observan rayas cuando la temperatura de la caja de entrada es baja, primero se debe aumentar dicha temperatura, a continuaci\u00f3n se debe ajustar la velocidad de la cinta de colada y laminaci\u00f3n y, por \u00faltimo, se debe ajustar el nivel de l\u00edquido.<\/p>\n

(3) Adoptar medidas de filtrado, seleccionar las adecuadas filtro de espuma cer\u00e1mica<\/a> (seg\u00fan la tecnolog\u00eda de aleaci\u00f3n utilizada), y filtrar las inclusiones de s\u00f3lidos en suspensi\u00f3n presentes en la masa fundida.<\/p>\n

(4) Limpiar la caja frontal y la base, el tubo de alimentaci\u00f3n, el canal de vertido, etc., cuando la m\u00e1quina est\u00e9 parada, para evitar que se introduzcan impurezas met\u00e1licas y no met\u00e1licas en la boquilla de colada al colocar la losa.<\/p>\n

(5) Aseg\u00farese de que el gas de refinado sea puro. Si se observa que el aluminio fundido es viscoso, cambie a la fuente de gas alternativa a tiempo para evitar que se vea afectada la calidad de la masa fundida.<\/p>","protected":false},"excerpt":{"rendered":"

The bright bars are mainly caused by metal and non-metal impurities brought into the nozzle and stayed in the front of the nozzle during the…<\/p>","protected":false},"author":1,"featured_media":5036,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-4985","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nBright Bars Treatment Measures by Controlling Aluminum Liquid<\/title>\n<meta name=\"description\" content=\"The bright bars are mainly caused by metal and non-metal impurities brought into the nozzle and stayed in the front of the nozzle.\" \/>\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\/bright-bars\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" 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