{"id":8248,"date":"2021-03-31T03:56:26","date_gmt":"2021-03-31T03:56:26","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8248"},"modified":"2021-03-31T03:56:26","modified_gmt":"2021-03-31T03:56:26","slug":"feeder-caster-tips","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/feeder-caster-tips\/","title":{"rendered":"Consejos para el lanzador de cebo"},"content":{"rendered":"

Durante el proceso de colada de bandas de aluminio, el aluminio fundido se introduce desde las puntas alargadas de la m\u00e1quina de colada hasta el espacio entre dos rodillos contrarrotatorios refrigerados por agua. El aluminio fundido se enfr\u00eda al entrar en contacto con los rodillos y mientras pasa entre ellos, formando as\u00ed una banda met\u00e1lica colada ancha de espesor uniforme. Siempre que se suministre metal l\u00edquido a la m\u00e1quina de colada, el proceso de colada puede continuar de forma continua.<\/p>\n

Las puntas de los alimentadores de fundici\u00f3n suelen estar fabricadas con un material cer\u00e1mico de baja densidad capaz de resistir la abrasi\u00f3n y el choque t\u00e9rmico provocados por el contacto con el aluminio l\u00edquido, como por ejemplo un placa de fibra cer\u00e1mica<\/a> con la forma necesaria.<\/p>\n

Debido a la baja densidad de estos materiales, su conductividad t\u00e9rmica es muy baja (normalmente inferior a 0,18 W\/mK) y pueden proporcionar un cierto grado de aislamiento t\u00e9rmico al aluminio l\u00edquido en el Consejo sobre ruedas<\/a>.<\/p>\n

Sin embargo, tras un tiempo de producci\u00f3n, pueden sufrir corrosi\u00f3n qu\u00edmica y desgaste. Esto provocar\u00e1 la formaci\u00f3n de diversas impurezas en la estructura de la punta y, con el tiempo, dar\u00e1 lugar a una interrupci\u00f3n prematura del movimiento de colada.<\/p>\n

\"Losa<\/p>\n

Principios generales para la configuraci\u00f3n de la zona de colada y laminaci\u00f3n<\/p>\n

Se aumenta el espesor de la chapa laminada en caliente y se reduce la superficie laminada en caliente.
\nEl di\u00e1metro del rodillo de colada aumenta, y la superficie de colada tambi\u00e9n aumenta.
\nEl grosor del borde de la boquilla de colada aumenta y se ampl\u00eda la superficie de laminaci\u00f3n de la colada.
\nLa fuerza de laminaci\u00f3n de la maquinaria es elevada y se ha ampliado la zona de colada y laminaci\u00f3n.
\nLa zona de laminado en caliente del aluminio puro y las aleaciones blandas es ligeramente m\u00e1s larga, mientras que la de las aleaciones duras es ligeramente m\u00e1s corta.
\nLa velocidad de laminaci\u00f3n por colada se refiere a la velocidad de la chapa laminada por colada. En comparaci\u00f3n con la velocidad lineal del rodillo de colada, la velocidad de laminaci\u00f3n por colada presenta un cierto deslizamiento hacia delante. Cuanto mayor es el di\u00e1metro, mayor es el deslizamiento hacia delante. El deslizamiento hacia delante suele ser de aproximadamente 6-10%.<\/p>\n

La velocidad de colada viene determinada por la cavidad l\u00edquida. Cuando la velocidad de laminado de la colada aumenta hasta un determinado valor cr\u00edtico, el frente de cristalizaci\u00f3n se desplaza hacia el plano de salida del rodillo de colada. Debido al retraso en el enfriamiento, la cavidad l\u00edquida se hace m\u00e1s profunda hasta que el metal no llega a solidificarse a tiempo y el metal l\u00edquido sale del rodillo. Las costuras se desbordan y afectan al laminado normal.<\/p>\n

Por lo tanto, existe una velocidad l\u00edmite en la velocidad de laminaci\u00f3n de la fundici\u00f3n, es decir, la velocidad m\u00e1xima para una laminaci\u00f3n estable en la cavidad l\u00edquida cr\u00edtica.<\/p>","protected":false},"excerpt":{"rendered":"

During the aluminum strip casting process, molten aluminum is fed from the elongated feeder caster tips into the nip between two counter-rotating water-cooled rolls. 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