公开(公告)号：US06742567B2

公开(公告)日：2004-06-01

申请号：US09932610

申请日：2001-08-17

申请人： Walter L. Winterbottom ,  Dan V. Chirieac ,  Jason M. Unruh ,  Jian Lu

发明人： Walter L. Winterbottom ,  Dan V. Chirieac ,  Jason M. Unruh ,  Jian Lu

IPC分类号： B22D1700

CPC分类号： B22D17/007 ,  C22C1/005 ,  Y10S164/90

摘要： A method of producing a semi-solid material without stirring, including heating a metal alloy to form a metallic melt, transferring a select amount of the melt into a vessel, nucleating the melt by regulating the transferring of the melt into the vessel, and crystallizing the melt within the vessel by cooling the melt at a controlled rate to produce a semi-solid material having a microstructure comprising rounded solid particles dispersed in a liquid metal matrix. In one form of the invention, a temperature-controlled shot sleeve is provided for receiving and cooling an amount of metallic melt at a controlled rate to produce the semi-solid material. The shot sleeve has a number of heat transfer zones adapted to independently control the temperature of the melt disposed adjacent various portions of the shot sleeve. The shot sleeve also includes a ram operable to discharge the semi-solid material directly into a die mold to form a near-net-shape part.

摘要翻译： 一种在不搅拌的情况下制造半固体材料的方法，包括加热金属合金以形成金属熔体，将选定量的熔体转移到容器中，通过调节熔体转移到容器中成核熔体，并使结晶 通过以受控的速率冷却熔体而在容器内熔化以产生具有包含分散在液态金属基质中的圆形固体颗粒的微结构的半固体材料。 在本发明的一种形式中，提供温度控制的喷射套筒，用于以受控的速率接收和冷却一定数量的金属熔体以产生半固体材料。 喷射套筒具有多个传热区域，其适于独立地控制与喷射套筒的各个部分相邻设置的熔体的温度。 喷射套筒还包括可操作地将半固体材料直接排放到模具中以形成近净形状部分的冲头。