退火工艺对WE71镁合金冷轧板组织的影响  

Influence of annealing process on microstructure of WE71 alloy cold rolled sheet

作　　者：刘靖宝[1] 张奎[1] 李兴刚[1] 李永军[1] 袁家伟[1] 马鸣龙[1] 李蒙[1] 

机构地区：[1]北京有色金属研究总院有色金属材料制备加工国家重点实验室,北京100088

出　　处：《材料热处理学报》2015年第4期93-97,共5页Transactions of Materials and Heat Treatment

基　　金：国家重点基础研究发展计划(2013CB632202)

摘　　要：研究了不同退火工艺对WE71镁合金冷轧板的微观组织和硬度值的影响。试验表明,经挤压开坯,然后室温轧制的WE71镁合金板材在退火过程中发生了静态再结晶现象,使晶粒细化,组织均匀性改善。在480℃退火20 min,硬度值下降大约13%;通过对比480和500℃下退火过程中的平均晶粒尺寸、组织均匀性及硬度值,制定出最佳的退火工艺:退火温度为480℃,退火时间15~20 min。Influences of different annealing processes on the microstructure and properties of WE71 magnesium alloy cold rolled sheet were investigated. The result shows that,the static recrystallization phenomenon of WE71 alloy sheet with extrusion composite rolling can occur,and it has fine grains and uniform microstructure. The hardness values of the alloy decrease about 13% after annealing at 480 ℃for 20 min. By comparing the average grain size,microstructure uniformity and hardness values of the alloy during the process of annealing at 480 and 500 ℃,the optimum process is annealing at 480 ℃ for 15 to 20 min.

关 键 词：镁合金板材 晶粒细化 均匀性 退火 硬度 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG166.4[金属学及工艺—金属材料]