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    Twin roll casting of magnesium and magnesium alloys
    3.
    发明授权
    Twin roll casting of magnesium and magnesium alloys 有权
    双辊铸造镁镁合金

    公开(公告)号：US07028749B2

    公开(公告)日：2006-04-18

    申请号：US11068514

    申请日：2005-02-28

    申请人： Daniel Dong Liang ,  Wendy Borbidge ,  Daniel Raymond East ,  Ross Victor Allen

    发明人： Daniel Dong Liang ,  Wendy Borbidge ,  Daniel Raymond East ,  Ross Victor Allen

    IPC分类号： B22D11/22

    CPC分类号： B22D11/064 ,  B22D11/0622 ,  B22D11/0697

    摘要： A process for the production of magnesium alloy strip, by twin roll casting, includes the steps of passing molten alloy from a source of supply to a feeding device; feeding the alloy from the feeding device through an elongate outlet of a nozzle and a pair of substantially parallel rolls spaced to define a bite therebetween; rotating said rolls whereby alloy is drawn from the chamber through the bite; and flowing coolant fluid through each roll and thereby cool alloy received in the chamber by heat energy extraction by the rolls whereby substantially complete solidification of the alloy is achieved in the chamber prior to alloy passing through the bite as hot rolled alloy strip. Alloy is held at the source at a temperature sufficient to maintain alloy in the feed device at a superheated temperature; a depth of molten alloy is maintained in the feed device at from about 5 mm to about 22 mm above a centerline of the bite in a plane containing the axes of the rolls; and heat energy extraction by the cooled rolls is maintained at a level sufficient to maintain alloy strip issuing from the bite at a surface temperature below about 400° C.; whereby the hot rolled alloy strip is substantially free of cracks and has good surface quality.

    摘要翻译： 通过双辊铸造生产镁合金带材的方法包括将熔融合金从供给源送入给料装置的步骤; 通过喷嘴的细长出口和一对基本上平行的辊将来自进料装置的合金供给，以间隔开它们之间的咬合; 旋转所述辊，从而通过所述咬合从所述室抽出合金; 并且通过每个辊流动冷却剂流体，从而通过由辊进行的热能提取来冷却容器中接收的合金，从而在合金通过作为热轧合金带的咬合之前，在室中实现合金的基本上完全的固化。 合金在足够的温度下保持在源处，以保持进料装置中的合金处于过热温度; 在包含辊的轴线的平面中，在咬合件的中心线上方约5毫米至约22毫米处，在进料装置中保持熔融合金的深度。 并且通过冷却的辊的热能提取保持在足以在低于约400℃的表面温度下保持从咬合出来的合金带的水平; 由此热轧合金带基本上没有裂缝并具有良好的表面质量。