镁合金磁控TIG焊工艺参数的优化设计

基金项目: 辽宁省教育厅资助项目(201124125);辽宁省自然科学基金资助项目(20072041)

Optimum design of magnesium alloy welding parameters with GTAW under magnetic field

School of Material Science and Engineering, Shenyang University of Technology, Shenyang 110870, China

摘要: 在AZ31镁合金的TIG焊过程中施加交流纵向磁场,通过调节磁场参数和焊接参数进行施焊.为了研究磁场参数与焊接工艺参数联合作用下镁合金焊接接头组织性能的变化规律,简化试验步骤,采用正交试验对磁场参数和焊接工艺参数进行设计,并对不同参数下焊接接头的显微组织、硬度和拉伸性能进行分析,确定最佳参数匹配.结果表明,当焊接电流为80 A,磁场电流为2 A,磁场频率为20 Hz时,镁合金焊接接头的力学性能达到最佳值.
- 镁合金 /
- 磁控焊接 /
- 参数优化设计
Abstract: During the welding of AZ31 magnesium alloy plate by GTAW, AC longitudinal and conversion magnetic field were used.The magnetic field current and magnetic field frequency can be adjusted during welding process.Orthogonal experimental design was used to study the effect of parameters on the properties and microstructure of welded joint.The properties of tensile strength and hardness of welded joint were tested.The microstructure of magnesium welded joint was analyzed by metallographic microscope at the same time.The results show that the optimal properties of magnesium alloy welded joint are obtained when welding current is 80 A, magnetic field current is 2 A, and frequency is 20 Hz.
- magnesium alloy /
- welding process under magnetic field /
- parameters optimum design