变形温度和程度对ZK60镁合金组织和力学特性的影响  

Effect of deformation parameters on microstructure and mechanical properties of ZK60 magnesium alloy

作　　者：李艳[1] 张治民[1] 倪杨[2] 谢志平[1] 薛勇[1] 杨勇彪[1] 

机构地区：[1]中北大学材料科学与工程学院,山西太原030051 [2]中国兵器科学研究院宁波分院,浙江宁波315103

出　　处：《兵器材料科学与工程》2013年第2期59-62,共4页Ordnance Material Science and Engineering

基　　金：山西省留学人员科技活动项目(20120303ZX);山西省青年科学基金项目(2007021026);中北大学校基金项目的资助

摘　　要：借助平面压缩实验、力学特性测试及微观组织分析,研究变形温度(260,300,340,380,420℃)和变形程度(等效塑性应变:0.80,1.59,2.07,2.38,2.65)对均匀化处理(420℃×12 h)ZK60镁合金组织和力学特性的影响规律。研究表明:在相同变形量下,随变形温度上升,ZK60镁合金抗拉强度先增加后减小,合金的伸长率先增加后减小,最后又上升;随变形量的增加,ZK60镁合金的抗拉强度和伸长率先增加后减小。等效塑性应变为2.07,获得比较细小的等轴晶粒,使合金的强度和伸长率大幅提高。Using planar compression experiments, metallographic observation and the mechanical properties tests, the microstructure and mechanical properties of ZK60 magnesium alloy under homogenization treatment （420 ℃× 12 h）and further deformation at different temperature （260,300,340,380,420 ℃ ） at different equivalent plastic strain （0.80, 1.59,2.07,2.38, 2.65） were studied. The results show that the tensile strength of ZK60 alloy increases firstly and then decreases as the deformation temperature increases at the same plastic strain. However, the elongation of ZK60 alloy increases firstly and then decreases and increases finally. The tensile strength and elongation of ZK60 alloy increase firstly and then decrease as the plastic strain increases at the same deformation temperature. When the equivalent strain is 2.07, fine equiaxed grains are observed, which lead to the high tensile strength and elongation for ZK60 alloy.

关 键 词：ZK60镁合金 变形参数 组织 力学特性 

分 类 号：TG376.2[金属学及工艺—金属压力加工]