GW83镁合金热处理工艺研究  

Study on Heat Treatment Process of GW83 Magnesium Alloy

作　　者：于建民[1] 程少博 张治民[1] 程眉[1] 杨亚琴[1] 卢知渊 YU Jianmin;CHENG Shaobo;ZHANG Zhimin;CHENG Mei;YANG Yaqin;LU Zhiyuan(Scho ol of Material Science and Engineering,North University of China,Taiyuan 030051,China;Institute of Technology,Inner Mongolia First Machinery Group Co.,Ltd.,Baotou 014000,China)

机构地区：[1]中北大学材料科学与工程学院,山西太原030051 [2]内蒙第一机械集团有限公司工艺研究所,内蒙古包头014000

出　　处：《热加工工艺》2019年第24期127-132,共6页Hot Working Technology

基　　金：国家重点研发计划项目(2016YFB0301103-3).

摘　　要：为获得GW83镁合金最佳热处理工艺,通过微观组织观察、拉伸性能测试、断口扫描及XRD衍射分析,研究了不同热处理工艺参数对合金组织和力学性能的影响。结果表明,合金经T6(450℃×12 h+225℃×18 h)热处理后,组织分布均匀,析出大量亚稳定态β’-Mg3-5RE强化相,获得了最为优异的综合力学性能,GW83镁合金的抗拉强度、屈服强度、伸长率分别为351.61 MPa、266.38 MPa、11.44%。断口形貌存在大量韧窝及少数解理面,表现为韧性与脆性断裂并存的复合型断裂模式。In order to obtain the best heat treatment process for GW83 magnesium alloy,the effects of different heat treatment parameters on the microstructure and mechanical properties of the alloy were studied by microstructure observation,tensile property test,fracture scanning and XRD diffraction analysis.The results show that,after heat treatment of T6(450℃×12 h+225℃×18 h),the microstructure distribution of the alloy is uniform and a large number of sub-stableβ’-Mg3-5RE strengthening phases are precipitated.The most excellent comprehensive mechanical properties were obtained.The tensile strength,yield strength and elongation of the GW83 magnesium alloy are 351.61 MPa,266.38 MPa and 11.44%,respectively.There are a large number of dimples and a few cleavage surfaces in the fracture morphology,which shows the composite fracture mode of the coexistence of ductile and brittle fracture.

关 键 词：GW83镁合金 热处理 显微组织 力学性能 

分 类 号：TG166.4[金属学及工艺—热处理]