The joining of Mg alloy to steel was realized by metal inert-gas arc welding, and the weld thermal cycle characteristics and Mg-steel joints were investigated. The results show that the temperature distribution in the...The joining of Mg alloy to steel was realized by metal inert-gas arc welding, and the weld thermal cycle characteristics and Mg-steel joints were investigated. The results show that the temperature distribution in the joints is uneven. Mg alloy welds present a fine equiaxed grain structure. There exists a transition layer consisting mainly of AlFe, AlFe3 and Mg（Fe, Al）2O4 phases at Mg/steel interface, and it is the weakest link in Mg？steel joints. The welding heat input and weld Al content have the significant effect on the joint strength. The joint strength increases with increasing the heat input from 1680 J/cm to 2093 J/cm, due to promoting Mg/steel interface reaction. When weld Al content is increased to 6.20%, the joint strength reaches 192 MPa, 80% of Mg alloy base metal strength. It is favorable to select the suitable welding heat input and weld Al content for improving joint strength.展开更多
MI焊接(Metal Inert Gas Arc Welding情性气体保护电弧焊)属于电弧焊中熔化极情性气体保护焊的一种,它采用惰性气体产生的气帘隔绝空气(惰性气体见表1所列),以防止高温使母材氧化。在汽车车身上的MIG焊接通常是指铝合金的焊接,所以也可...MI焊接(Metal Inert Gas Arc Welding情性气体保护电弧焊)属于电弧焊中熔化极情性气体保护焊的一种,它采用惰性气体产生的气帘隔绝空气(惰性气体见表1所列),以防止高温使母材氧化。在汽车车身上的MIG焊接通常是指铝合金的焊接,所以也可以称为MIG铝焊。随着铝焊机功能的完善,越来越多的汽车品牌认可采用铝焊接对车身外板进行焊接修复,注意不能采用MIG铝焊对车身结构件进行焊接,对结构件只能采用粘接加铆接进行修复。展开更多
文摘The joining of Mg alloy to steel was realized by metal inert-gas arc welding, and the weld thermal cycle characteristics and Mg-steel joints were investigated. The results show that the temperature distribution in the joints is uneven. Mg alloy welds present a fine equiaxed grain structure. There exists a transition layer consisting mainly of AlFe, AlFe3 and Mg（Fe, Al）2O4 phases at Mg/steel interface, and it is the weakest link in Mg？steel joints. The welding heat input and weld Al content have the significant effect on the joint strength. The joint strength increases with increasing the heat input from 1680 J/cm to 2093 J/cm, due to promoting Mg/steel interface reaction. When weld Al content is increased to 6.20%, the joint strength reaches 192 MPa, 80% of Mg alloy base metal strength. It is favorable to select the suitable welding heat input and weld Al content for improving joint strength.
文摘MI焊接(Metal Inert Gas Arc Welding情性气体保护电弧焊)属于电弧焊中熔化极情性气体保护焊的一种,它采用惰性气体产生的气帘隔绝空气(惰性气体见表1所列),以防止高温使母材氧化。在汽车车身上的MIG焊接通常是指铝合金的焊接,所以也可以称为MIG铝焊。随着铝焊机功能的完善,越来越多的汽车品牌认可采用铝焊接对车身外板进行焊接修复,注意不能采用MIG铝焊对车身结构件进行焊接,对结构件只能采用粘接加铆接进行修复。
