作　　者： ; ; ;

机构地区： 江苏大学材料科学与工程学院

出　　处： 《铸造》 2004年第12期1008-1010,共3页

摘　　要： 半固态加工技术中的一个关键问题就是如何制备优质的半固态合金棒坯料。通过在亚共晶Al Si合金熔液中搅入初生Si相为颗粒状的过共晶Al Si合金,使颗粒状Si相在液相线温度下扩散到熔液中,成为形核质点,抑止枝晶组织的形成,从而获得满足半固态加工要求的非枝晶组织。结合电镜分析结果,对变质作用的机理进行了初步分析。 The key question of the semisolid process technology is how to prepare high quality semisolid alloy stock. During the preparation process of semisolid stock, the transcocrystallized Al-Si alloy was mixed into the semi-solid state hypoeutectic Al-Si alloy molten, which Silicon phase is graininess, and the non-arborescent structure could be gotten through the diffusion of the silicon phase into the molten under the liquid line temperature, which becomes the nucleation point and breaks the continuous growth of the arborescent structure. This new method is very simple and easy to operate. It is adapt to the production of the domestic small and medium-sized enterprise, and has the practice meaning of cost reduction and increasing the cast quality.

关 键 词： 过共晶 合金 亚共晶 合金 枝晶 非枝晶

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺]