固溶处理对Mg-2.0%Zn-0.7%Mn合金热变形过程及变形组织的影响  

Effects of Solution Treatment on Hot Deformation Process and Deformed Microstructure of Mg-2.0%Zn-0.7%Mn Alloy

作　　者：彭建[1] 樊世波[1] 宋成猛[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044

出　　处：《热加工工艺》2009年第14期8-11,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(50725413);国家重点基础研究发展规划973基金资助项目(2007CB613704)

摘　　要：结合Gleeble热模拟试验机上的热压缩试验和实际工业生产挤压试验,研究了固溶处理对Mg-2.0%Zn-0.7%Mn合金的变形过程及变形组织的影响。结果表明:对该合金进行360℃的固溶处理时,随固溶时间的延长,热压缩变形流变应力的峰值不断降低;固溶时间超过12 h后,流变应力峰值趋于稳定。随固溶处理时间的延长,经热压缩变形组织的再结晶晶粒尺寸增大,组织均匀性增强。固溶处理对Mg-2.0%Zn-0.7%Mn挤压态合金的强度塑性影响不大,但可降低挤压时的流变应力。The effects of solution treatment on hot deformation process and deformed mierostructure of Mg-2.0% Zn-0.7%Mn alloy were studied by hot compression test on gleeble simulator and field extrusion test. The results show that the peak flow stress decreases with the increase of solution time at 360 ℃. After solution for 12 h, the peak flow stress is hardly to increase. With the increase of solution treatment time, the average size of the recrystallized gains after hot compression deformation increases and the deformed microstructure becomes more uniform. The effect of solution time on mechanical properties is remarkable, but the flow stress decreases after extrusion.

关 键 词：镁合金 固溶处理 变形组织 组织均匀性 

分 类 号：TG146.22[一般工业技术—材料科学与工程]