脉冲电流处理对ZA12合金凝固组织和力学性能的影响  

Effect of Electric Current Pulse on the Solidification Structure and Mechanical Properties of the Casting ZA12 Alloy

作　　者：肖蕴华[1] 杨菲[1] 原正兴[2] 高明[1] 王宝全[1] 郭敬东[1] 何冠虎[1] 

机构地区：[1]中国科学院金属研究所,辽宁沈阳110016 [2]沈阳工业学院,辽宁沈阳110006

出　　处：《热加工工艺》2002年第6期32-33,共2页Hot Working Technology

基　　金：国家自然科学基金资助项目(59889101)

摘　　要：研究了在ZA12合金凝固过程中的脉冲电流处理对合金凝固组织和力学性能的影响。结果表明,凝固过程中的电脉冲处理明显细化了合金的凝固组织,使枝晶尺寸减小,近球状组织增多;试样的抗拉强度也有提高。经分析认为,这与脉冲电流通过金属熔体时促进晶粒游离,均匀熔体的温度场和溶质场有关。The effect of electric current pulse on the casting ZA12 alloy was investigated.The results show that the primary phase in the solidification structure with electric current treatment evolves into nearspherical fine particle from normal dendrite and the tensile strength is improved.The accelerated particledrift and heat transfer causedby electropulsing pressure during electric current pulse treatment may result in these changes.

关 键 词：脉冲电流 ZA12合金 凝固组织 力学性能 

分 类 号：TG111.4[金属学及工艺—物理冶金]