AZ91HP镁合金变质精炼的实验研究  

Experimental Study on Modifying and Refining Treatment of AZ91HP Magnesium Alloy

作　　者：赵鸿金[1] 张迎晖[1,2] 康永林[2] 

机构地区：[1]江西理工大学材料与化学工程学院,江西赣州341000 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《中国材料科技与设备》2007年第6期93-95,共3页Chinese Materials Science Technology & Equipment

基　　金：国家863计划项目（2002AA336080）;国家973计划项目（G2000067202）;江西省教育厅资助项目

摘　　要：研究了AZ91HP镁合金在不同变质、精炼条件下铸件的组织和力学性能。结果表明：变质、精炼处理后，镁合金铸件晶粒得到细化，力学性能提高。其中CzCls变质结合氩气吹洗精炼效果最好，在此条件下，铸件T6状态力学性能达到了σ0.2=132．6MPa、σb=250．5MPa和δ—4．93％。进一步分析表明晶粒细化的机理为含C、A1化合物的异质形核作用。The microstructures and mechanical properties of AZ91 HP magnesium alloys under different modifying and refining treatments have been studied. The results show that the grain sizes of modified and/or refined magnesium alloys decreased and the properties increased. The method of modifying with C2C16 and refining with argon gas have the best effect on the mechanical properties of Mg-A1 series magnesium alloys, and the yield strength, ultimate strength and elongation in T6 status are 132.6MPa, 250.5MPa and 4.93 % respectively. Farther research shows that the heterogeneous nucleation effect of compound containing C and A1 is the grain refinement mechanism.

关 键 词：镁合金 变质 精炼 晶粒细化 异质形核 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG243[金属学及工艺—金属材料]