AZ31镁合金薄板热油恒温成形数值模拟与实验研究  

Numerical Simulation and Experimental Study on Hot Oil Thermostatic Temperature Forming of AZ31 Magnesium Alloy Sheet

作　　者：余犇 王冬晓 刘禹 李建平[1] YU Ben;WANG Dong-xiao;LIU Yu;LI Jian-ping(State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China;College of Materials Science and Engineering,Shenyang Ligong University,Shenyang 110819,China)

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819 [2]沈阳理工大学材料科学与工程学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2024年第2期179-186,共8页Journal of Northeastern University(Natural Science)

基　　金：国家重点研发计划项目(2017YFB0304100).

摘　　要：利用有限元模拟和成形实验相结合的方式,研究AZ31镁合金的成形性能,基于Dynaform模拟软件和热油恒温成形设备,探究出一种适合镁合金的热成形工艺,并对成形件显微组织进行分析.研究表明,通过调整薄板尺寸、模具R角、压边力及摩擦系数等工艺参数,以降低成形件的底部减薄率,减少破裂倾向,提高镁合金的成形性能;成形温度为200℃,模具R角为16 mm,薄板直径为80 mm,并调整合适压边力和摩擦系数,可获得最佳的工艺窗口;靠近成形件底部,晶粒及第二相尺寸逐渐减小并趋于均匀化.The formability of AZ31 magnesium alloy was studied by finite element simulation and forming experiment.It’s based on Dynaform simulation software and hot oil thermostatic forming equipment to explore a hot forming process which is suitable for magnesium alloy,and to analyze the microstructure of the formed parts.The results showed that by adjusting the process parameters such as the plate size,die R angle,blank holder force and friction coefficient,the bottom thinning rate of the formed part and the fracture tendency can be reduced,and the forming performance of magnesium alloy can be improved;and when the forming temperature is 200℃,the die R angle is 16 mm,the plate diameter is 80 mm,the appropriate blank holder force and friction coefficient are adjusted,it can obtain the best process window.Near the bottom of the formed parts,the grain size and the second phase size gradually decrease and tend to be uniform.

关 键 词：AZ31镁合金 热油恒温成形 工艺参数 减薄率 成形性能 

分 类 号：TG394[金属学及工艺—金属压力加工]