Mg-10Gd-3Y-Zr镁合金的热处理工艺  

Heat treatment of Mg-10Gd-3Y-Zr magnesium alloy

作　　者：胡传凯[1] 赵强[1] 王艳彬[1] 宁海青[1] 屈俊岑 Hu Chuankai;Zhao Qiang;Wang Yanbin;Ning Haiqing;Qu Juncen(No.59 Research Institute of China Ordnance Industry,Chongqing 400039,China)

机构地区：[1]中国兵器工业第五九研究所

出　　处：《金属热处理》2018年第9期94-97,共4页Heat Treatment of Metals

摘　　要：针对Mg-10Gd-3Y-Zr高强韧镁合金,采用相图热力学计算方法（CALPHAD）、相平衡热力学计算软件（PANDAT）,根据扎克哈罗夫经验公式等初步确定合金的固溶、时效温度范围,研究了合金时效硬化曲线、时效温度及时间对合金力学性能及显微组织的影响。结果表明：Mg-10Gd-3Y-0.6Zr镁合金的最佳热处理工艺为225℃×20 h直接时效,此时组织中强化相析出完毕,且均匀分布,对应的抗拉强度为490 MPa,断后伸长率为11%,拉伸断裂为韧性断裂。The solution treatment and aging temperature range of the alloy of MG-10 GD-3 Y-ZR with High-strength and ductile magnesium were preliminarily determined according to the Zakharov empirical formula by using phase diagram thermodynamic calculation method（ Calphad） and phase equilibrium thermodynamic calculation software（ PANDAT）. The effects of aging hardening curve,aging temperature and time on the mechanical properties and microstructure of the alloy were studied. The results show that optimum heat treatment process for Mg-10 Gd-3 Y-Zr magnesium alloys is directly to age at 225 ℃ for 20 h,with which the strengthening phases are precipitated completely and homogeneously,and the corresponding strength and elongation are 490 MPa and 11%,respectively. The tensile fracture is ductile.

关 键 词：Mg-10Gd-3Y-Zr镁合金 时效 热处理 组织 性能 

分 类 号：TG156[金属学及工艺—热处理]