TA15钛合金超高频氩弧焊工艺试验研究

针对TA15钛合金材料进行了超高频脉冲钨极氩弧焊接工艺试验。采用金相试验方法和力学性能试验对超高频焊接和常规焊接工艺下的显微组织和性能进行对比。结果表明,采用超高频氩弧焊的焊缝宽度明显比常规氩弧焊窄,晶粒尺寸减小30%以上;α相片层厚度要厚于常规焊,且分布更规律、更有序。超高频脉冲焊接接头抗拉强度与常规氩弧焊基本相当,塑性优于常规氩弧焊,其疲劳性能也高于常规焊。

High Frequency Pulse Tungsten Arc Welding Process Trials of TA15 Titanium Alloy

High frequency pulse tungsten arc welding process trials of TA15 titanium alloy are carried out.The microscopic structures and properties of weld with high frequency TIG and conventional TIG are compared based on metallographic test and mechanical test.The results show that the width of high frequency TIG weld is obviously narrower and the grain size is decreased by more than 30％.It also shows that the alpha phase layer is thicker than that of the conventional welding,and the distribution is more regular and more ordered.The tensile strength of the ultra high frequency pulse welding joint is equal to that of the conventional argon arc welding,and the plasticity is better,the fatigue property is higher.