高压固溶及常压时效处理对AM60镁合金组织及压缩性能的影响  

Effect of High-pressure Solution and Atmospheric-pressure Aging Treatment on Microstructure and Compressive Properties of AM60 Alloy

作　　者：岳学庆[1] 段文燕[1] 薛云[1] 鲁研[1] 

机构地区：[1]秦皇岛职业技术学院机电工程系,河北秦皇岛066100

出　　处：《热加工工艺》2012年第2期195-197,共3页Hot Working Technology

基　　金：国家自然科学基金资助项目(50975247)

摘　　要：对铸态AM60镁合金在不同压力(常压、2、4和6 GPa)下固溶并随后在常压下进行190℃×9 h时效处理。采用金相显微镜和X射线衍射表征了产物的显微组织,并使用Gleeble-3500热模拟机研究了产物的压缩力学性能。结果表明,相比常压固溶,固溶时施加压力使时效处理合金的α-Mg晶粒显著减小,尺寸更加均匀。随固溶压力的提高,时效处理合金的抗压强度逐渐升高直到4 GPa,随后下降,同时最大塑性应变逐渐降低直到4 GPa,随后上升。As-cast AM60 alloy was solid dissolved under different pressures（atmospheric-pressure,2,4 and 6 GPa） and subsequently aged for 9 h at 190 ℃ under atmospheric-pressure.The microstructure of the products was characterized by optical microscope and X-ray diffraction,and the compressive properties of the products were investigated by hot-stimulation machine Gleeble-3500.The results show that,compared with atmospheric-pressure solution,high-pressure solution causes that the α-Mg grains of aging alloy are more fine and uniform.With the increase of the solution pressure gradually,the compressive strength of aging alloy increases up to 4 GPa and then decreases,while maximum plastic strain decreases up to 4 GPa and then increases.

关 键 词：镁合金 高压固溶 常压时效 压缩性能 

分 类 号：TG156.92[金属学及工艺—热处理]