摘要
研究焊接速度对脉冲电流钨极惰性气体保护焊接（PCGTAW）AZ31B镁合金接头组织和拉伸性能的影响。实验中焊接速度为105-145 mm/min。结果表明,焊接速度为135 mm/min时,所得接头具有最好的拉伸性能。在熔合区生成的细小晶粒组织和均匀分布的析出相是导致较好的拉伸性能的主要原因。
The effect of welding speed on tensile and microstructural characteristics of pulsed current gas tungsten arc welded（PCGTAW） AZ31 B magnesium alloy joints was studied. Five joints were fabricated using different levels of welding speeds（105-145 mm/min）. It was found that the joints fabricated using a welding speed of 135 mm/min yielded superior tensile properties compared to other joints. The formation of fine grains and uniformly distributed precipitates in the fusion zone are the main reasons for the superior tensile properties of these joints.
基金
University Grant Commission (UGC), New Delhi for financial support rendered through Major Research Project No: 39-864/2010
