锶和钙在镁-铝系合金中的应用及研究进展

论述了耐热镁合金的研究现状。介绍了碱土元素Ca和Sr对Mg-Al系合金的铸造性能、微观组织、拉伸性能和抗蠕变性能的影响。同时对Ca、Sr在镁合金中应用前景作了展望。     

Creep resistance of Mg-4%Al-2%RE-2%Ca alloy

1 INTRODUCTION The ternary AE42( Mg-4 %Al-2 %RE) alloy , in which RE mostly is lanthanum-rich or cerium- rich misch metal ,shows good elevatedtemperature properties ,excellent die castability and acceptable cost[1]. However , when the temperature is above 150 ℃,its creep resistance drops abruptly , which li mits its further application in automotive indus- try[2]. Calciumadditions have good effects on creep resistance of binary Mg-Al alloys[3 ,4]. But nearly no results have been publ…