Mg-Gd-Y-Sm-Ag-Zr合金显微组织及性能研究  

Study on the microstructure and properties of Mg‑Gd‑Y‑Sm‑Ag‑Zr alloy

作　　者：姚茂海 罗天纵 陈辰 王远顺 谢文 吕晶 代旺 YAO Maohai;LUO Tianzong;CHEN Chen;WANG Yuanshun;XIE Wen;LÜJing;DAI Wang(Hunan Rare Earth Metal Materials Research Institute Co.,Ltd.,Changsha 410126,China;School of Material Science and Engineering,Jiangxi University of Science and Technology,Ganzhou,341000,China;Changsha Xinhang Wheel&Brake Co.,Ltd.,Changsha 410205,Chain)

机构地区：[1]湖南稀土金属材料研究院有限责任公司,湖南长沙410126 [2]江西理工大学材料科学与工程学院,江西赣州341000 [3]长沙鑫航机轮刹车有限公司,湖南长沙410205

出　　处：《现代交通与冶金材料》2025年第2期117-122,共6页Modern Transportation and Metallurgical Materials

基　　金：长沙市技术及产品开发项目(kh2201394)。

摘　　要：结合XRD、DTA、金相分析研究了固溶时效工艺对Mg-Gd-Y-Sm-Ag-Zr合金显微组织结构、时效硬化特性及力学性能的影响。结果表明,Mg-Gd-Y-Sm-Ag-Zr合金最佳固溶时效条件为480℃/6 h,210℃/28 h;Sm和Ag复合添加能够提升铸态和时效态Mg-Gd-Y-Zr合金强度;铸态时,抗拉强度由207.70 MPa提升至236.77 MPa,提升了14%;时效态时,抗拉强度由274.14 MPa提升至303.71 MPa,提升了10.79%。The effect of solid solution aging process on the microstructure,age hardening characteris-tics,and mechanical properties of Mg-Gd-Y-Sm-Ag-Zr alloy is studied by combining XRD,DTA,and metallographic analysis.The results show that the optimal solid solution aging conditions for Mg-Gd-Y-Sm-Ag-Zr alloy are 480℃/6 h,210℃/28 h.The composite addition of Sm and Ag can en-hance the strength of as cast and aged Mg-Gd-Y-Zr alloys.During casting,the tensile strength in-creases from 207.70 MPa to 236.77 MPa with an increase rate of 14%.When in the aging state,the tensile strength increases from 274.14 MPa to 303.71 MPa with an increase rate of 10.79%.

关 键 词：Mg-Gd-Y-Sm-Ag-Zr 显微组织 力学性能 固溶时效 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG115.2[金属学及工艺—金属材料]