Y、Ca对AZ81镁合金耐热性能的影响  

Effect of Y and Ca on heat resistance of AZ81 magnesium alloy

作　　者：李志宏[1] 张晋涛[1] 张俊峰[1] 张玉波[1,2] 

机构地区：[1]四川工程职业技术学院,四川德阳618000 [2]四川大学,四川成都610064

出　　处：《轻合金加工技术》2015年第7期59-63,共5页Light Alloy Fabrication Technology

摘　　要：试验研究了添加w(Y)=2%的稀土元素Y和不同含量的碱土元素Ca对AZ81镁合金的高温组织和力学性能的影响。拉伸试验结果表明,稀土元素Y及碱土元素Ca可提高AZ81镁合金高温强度,伸长率随着钙含量的增加先升高后降低。微观分析表明,稀土元素Y及碱土元素Ca的加入可以使AZ81镁合金的组织细化,从而改善其高温性能。Rare earth element Y of ω（Y） = 2% and alkaline earth element Ca of different contents are added into AZ81 magnesium alloy, to study their influence on high temperature structure and mechanical properties on AZ81 magnesium alloy. The tensile test results show that addition of Y and Ca can improve high temperature strength of AZ81 magnesium alloy, and make its elongation first go up and then go down with the increase of Ca. Microstructure analysis demonstrates that addition of Y and Ca can refine microstructure of AZ81 magnesium alloy and improve its high temperature properties.

关 键 词：AZ81镁合金 耐热性 抗拉强度 伸长率 

分 类 号：TG146.22[一般工业技术—材料科学与工程]