镁合金AZ31B板材热拉深成形工艺研究  

Research on Magnesium Alloy (AZ31B) Sheets with Thermal Deep-drawing Process

作　　者：张坤[1] 王忠堂[1] 张士宏[1] 于传富[1] 许沂[1] 王强[1] 

机构地区：[1]中国科学院金属研究所,辽宁沈阳110016

出　　处：《轻合金加工技术》2003年第10期14-17,共4页Light Alloy Fabrication Technology

基　　金：国家高技术研究发展专项经费资助项目(2003AA331120)

摘　　要：镁合金(AZ31B)板材的成形性能可以通过热拉深试验来进行观察评估。成形温度选择在100～400℃之间,以获得适合成形的最佳温度范围。使用有限元方法分析了主要工艺参数对坯料成形质量的影响。试验结果表明,成形温度低于200℃时坯料很脆,高于400℃时坯料表面易发生氧化而不适合成形。当成形温度选择在300～350℃之间,压边力在6～15kN(单位压边力q为0.7～1.7MPa)之间时镁合金具有较好的成形性能,能成功拉深出质量好的筒形件。数值模拟结果表明,坯料与模具间的摩擦因数对产生破裂的影响较压边力的影响程度大。Formability of magnesium alloy (AZ31B) sheets can be investigated by thermal deep drawing experiments. The circular blank heated in an oven was formed at a temperature range of 100-400℃ to obtain the optimum forming temperature range. And the effects of major technical parameters on the workpiece quality were analyzed by the finite element method. It is found that the blank is brittle at temperatures lower than 200℃. Temperatures higher than 400℃ are not suitable for forming of the sheets because of severe oxidation. AZ31B shows an excellent formability at temperatures from 300℃ to 350℃ with a blank holder force range of 6-15 kN (g =0.7-1.7 MPa), and can be formed into a workpiece with good quality. According to the simulation results, friction coefficients have greater effect on causing fracture than blank holder forces.

关 键 词：镁合金 热拉深 成形温度 摩擦系数 压边力 板材 工艺参数 

分 类 号：TG386.32[金属学及工艺—金属压力加工] TG389