论文部分内容阅读
对2.2mm厚挤压态镁合金AZ31B板材进行交流GTAW焊研究,线能量分别取45.5、52、58.5、和65J/mm。结果表明:随着线能量的增加,焊缝熔化宽度逐渐增加,线能量为65J/mm时,表面成形最佳,焊缝达到熔透状态;焊缝区沉淀相β-Mg17Al12的平均尺寸及所占面积百分比随焊接线能量的增大而增大,当焊接线能量从45.5J/mm增大至65J/mm时,β-MMg17Al12的平均尺寸从1μm增大为4μm,在焊缝区所占面积百分比由8%增大至30%。
The AC GTAW welding of 2.2mm thick extruded AZ31B magnesium alloy plates was carried out with the line energies of 45.5, 52, 58.5 and 65 J / mm, respectively. The results show that the melting width increases with the increase of wire energy. When the wire energy is 65J / mm, the surface forming is the best, and the weld reaches the penetration state. The average size of the precipitated phase β-Mg17Al12 The area percentage increases with the increase of welding wire energy. When the welding wire energy increases from 45.5J / mm to 65J / mm, the average size of β-MMg17Al12 increases from 1μm to 4μm, The area percentage increased from 8% to 30%.