半固态合金流变成形技术的研究进展  

Research Progress on Rheoforming Technology of Semi-solid Alloy

作　　者：汤国兴[1,2] 毛卫民[1] 刘永峰[1] 

机构地区：[1]北京科技大学,北京100083 [2]景德镇陶瓷学院

出　　处：《铸造技术》2007年第5期709-713,共5页Foundry Technology

基　　金：国家高技术研究发展项目(No.2006AA03Z115);国家重点基础研究规划项目(No.2006CB605203);国家自然科学基金资助项目(No.50374012).

摘　　要：半固态合金组织的形成有两种不同的途径:枝晶球化和球形组织直接生长。经过30多年的发展,半固态合金流变成形又成为目前的研究重点。论述了双螺旋机械搅拌式流变射铸工艺、New Rheocast Processing、Semi Solid Rehoeasting、低过热度浇注和弱电磁搅拌式流变铸造、Continuous Rheoconversion Process的工艺特点和核心思想,分析了其发展前景。Two quite different means, i.e. spheroidization of dendritic structures and direct growh of spheroidal microstructure are used to form desired structure for semi-solid forming：. Although it was studied more than three decade, semi-solid forming is becoming the hot topic once again. The technological features and essential principle of the twin-screw rehomoulding, new rheocast processing, semi solid rehocasting, low superheat pouring and weak electromagnetic stirring and continuous rheoconversion Process are reviewed respectively, and the future prospect is point out.

关 键 词：半固态合金 流变成形 球形组织 

分 类 号：TG249.9[金属学及工艺—铸造]