AZ31镁合金板材温热冲压数值模拟与实验研究  

Numerical simulation and experimental study of warm deep drawing of AZ31 magnesium alloy sheet

作　　者：苌群峰[1] 李大永[1] 彭颖红[1] 曾小勤[2] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200030 [2]上海交通大学材料科学与工程学院,上海200030

出　　处：《中国有色金属学报》2006年第4期580-585,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(50405014);上海市重点基础研究资助项目(03JC1405)

摘　　要：采用Gleeble3500热模拟实验机进行了单向拉伸实验,分析了AZ31镁合金板材的力学性能;以此实验数据为基础,对温热冲压过程进行了数值模拟,研究了拉深温度、压边力等工艺因素对镁合金板材成形性能的影响;通过极限拉深比实验,对数值模拟结果进行了实验验证。结果表明:在极限拉深温度150℃,极限拉深速度15 mm/s,固定压边力的工艺条件下,极限拉深比能够达到2.5。模拟结果表明:模拟结果和实验结果具有良好的一致性;采用变压边力可以明显提高板材的冲压性能,极限拉深比将达到5.0。The uniaxial tensile test was conducted by using Gleeble 3500 thermal-mechanical simulator, and the mechanical property of AZ31 magnesium alloy sheet was analyzed. The test results were then employed in the numerical simulation of warm drawing process, and the influences of process parameters such as drawing temperature, blank holder force were investigated. In order to validate the simulation results, the limiting drawing ratio tests were also performed. The results show that, under the technique condition of limit forming temperature of 150℃ and limit drawing velocity of 15mm/s, the limiting drawing ratio can reach 2.5. The simulation results show that, simulation results are consistent with the experimental results. Using variable blank holder force can remarkably improve the forming performance, and the limiting drawing ratio would reach 5.0.

关 键 词：AZ31镁合金板材 温热冲压 数值模拟 极限拉深比 变压边力 

分 类 号：TG386.3[金属学及工艺—金属压力加工]