热处理对耐高温镁合金VW63Z组织和性能的影响  

Effect of Heat Treatment on Microstructure and Poperties of VW63Z Magnesium Alloy

作　　者：王胜龙 郭晓琳[1] 王志敏[1] 东栋 周小京 吴凯[1] Wang Shenglong;Guo Xiaolin;Wang Zhimin;Dong Dong;Zhou Xiaojing;Wu Kai(Beijing Hangxing Machinery Manufacture Co., Ltd., Beijing 100013)

机构地区：[1]北京航星机器制造有限公司

出　　处：《航天制造技术》2019年第4期1-4,10,共5页Aerospace Manufacturing Technology

基　　金：“高档数控机床与基础制造装备”科技重大专项资助项目（2018ZX04014-001）

摘　　要：为确定耐高温镁合金VW63Z最优的热处理制度,对锻态合金进行了不同温度和时间的固溶处理和时效处理,利用光学显微镜观察了合金的显微组织,并利用显微硬度计测试了合金的显微硬度。结果表明,耐高温镁合金VW63Z原始态组织由Mg基固溶体和呈现出条状有序结构的第二相组织两部分组成,合金最优的固溶温度和时间为520℃、20h,组织为弥散分布的不连续块状组织,第二相均匀,性能优良,合金最优的时效温度和时间为200℃、96h,组织中无析出相,显微硬度最高。In order to determine the optimal heat treatment process of wrought VW63Z magnesium alloy, solid solution treatment and aging treatment at different temperature and time were carried out, the microstructure was observed by optical microscope, and the microhardness was tested by microhardness tester. The results indicate that the original structure of VW63Z is composed of the Mg-based solid solution and the second phase presenting a strip of ordered structure. The optimal solution treatment temperature and time of wrought VW63Z respectively is 520℃ and 20h, and at this time, the metallographic structure is a discontinuous mass structure with a uniform second phase and excellent performance. The optimal aging treatment temperature and time of wrought VW63Z respectively is 200℃ and 96h, and at this time, no precipitated phase is in metallographic structure, the microhardness is the highest.

关 键 词：VW63Z镁合金 固溶 时效 显微组织 显微硬度 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG156[金属学及工艺—金属材料]