热处理对AZ91D镁合金组织及力学性能的影响  

Effect of heat treatment on structure and mechanical properties of AZ91D magnesium alloys

作　　者：马颖[1] 潘振峰[1] 张洪锋[1] 郝远[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料重点实验室,甘肃兰州730050

出　　处：《兰州理工大学学报》2009年第5期9-12,共4页Journal of Lanzhou University of Technology

基　　金：教育部春晖计划资助项目(Z2006-1-62002)

摘　　要：结合Mg-Al二元相图,研究不同时间固溶处理对AZ91D镁合金力学性能的影响,以及固溶时效处理后镁合金组织、性能的变化.结果表明,随着固溶处理时间的延长,AZ91D镁合金中的β相逐渐分解并溶入α相中,固溶处理5 h后,β相完全分解;继续延长固溶处理时间,AZ91D镁合金中的合金元素在扩散机制的作用下趋向均匀.研究还发现,AZ91D镁合金经415℃×10 h和415℃×24 h固溶处理后力学性能最优,且经时效处理后这2组工艺仍具有最优的力学性能.Incorporating with Mg-Al phase diagram, the effects 05 solid solution treatment for different time-periods on mechanical properties of magnesium alloy AZ91D, and the variation of its microstructure and properties after aging treatment were investigated. With the extension of solid solution treatment time, β-phase in AZglD decomposed gradually and dissolved in α-phase. After 5 h solid solution treatment, the phase decomposed completely. Continue to extend the treatment time, the alloying elements in the alloy approached to a uniform state because of the proliferation mechanism. The study found that AZ91Dmagnesium alloy treated with 415 ℃×10 h and 415 ℃× 24 h solid solution treatment exhibited the best mechanical properties, and after aging treatment, these two groups had the best performance, too.

关 键 词：AZ91D镁合金 固溶处理 Β相 力学性能 

分 类 号：TG146[一般工业技术—材料科学与工程]