热处理工艺对Mg-3Zn-0.6Zr合金组织和性能的影响  

Effect of Heat Treatment on Microstructure and Properties of Mg-3Zn-0.6Zr Alloy

作　　者：宋仁伯[1] 黄良 蔡长宏[1] 汪孪祥 王莉[2] SONG Renbo 1, HUANG Liang 1, CAI Changhong 1, WANG Luanxiang 1, WANG Li 2(1 School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083;2 School of Electronic and Information Engineering, University of Science and Technology Liaoning, Anshan 11405)

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]辽宁科技大学电子与信息工程学院,鞍山114051

出　　处：《材料导报》2018年第A01期203-207,共5页Materials Reports

基　　金：十三五国家重点研发计划(2016YFB0700303)

摘　　要：本工作采用的热处理工艺分为均匀化处理及固溶处理,通过金相显微镜、扫描电镜、能谱分析、X射线衍射分析、压缩试验和硬度测量等多种实验方法,研究Mg-3Zn-0.6Zr合金铸态和热处理态的组织及性能。研究发现,均匀化处理后,铸态合金晶粒细化,抗压强度提高到338.3 MPa;固溶处理后,铸态合金中的MgZn第二相逐渐溶解到α-Mg基体中,抗压强度提高到431.1 MPa。最后,确定了最佳热处理工艺为:固溶处理温度400℃,保温8h,水冷。In this paper,the heat treatment process mainly contains homogenizing treatment and solution treatment.The microstructure and properties of as-cast and heat-treated Mg-3 Zn-0.6 Zr alloy were studied by means of the OM,SEM,EDS,XRD,compression test and Vickers-hardness test.It was found that the grain refined and compression strength was also improved to 338.3 MPa by homogenizing treatment.After the solution treatment,the MgZn phase gradually dissolved into theα-Mg matrix and compression strength was improved to 431.1 MPa.The best heat treatment process is solution treating at 400 ℃ for 8 h,cooling by water.

关 键 词：Mg-3Zn-0.6Zr合金 铸态 热处理 显微组织 力学性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG166.4[金属学及工艺—金属材料]