AZ31B镁合金与TC4钛合金之间的电阻点焊连接

Connection of AZ31B Magnesium Alloys and TC4 Titanium Alloy Via Resistance Spot Welding

为实现AZ31B镁合金与TC4钛合金异种材料的电阻点焊连接,借助扩散焊原理,探讨了在其之间添加铝箔和铝粉的电阻点焊工艺,并对焊点的力学性能及微观结构进行了分析。结果表明,以铝粉作为添加物,可以获得力学性能较好的焊点,元素间的扩散及合金化反应是焊点性能得以提高的主要原因。

In order to make it became realistic that welding of AZ31B magnesium alloys and TC4 titanium alloy via resistance spot welding, in this work the theory of diffusion welding was used. The welding technology of AZ31B magnesium alloys and TC4 titanium alloy aluminum was discussed. In the process, aluminium foil and aluminium powder were used. The property and microstructure of welding spot were analysised by scanning electron microscope （SEM） and X-ray energy dispersion spectroscope （EDS）. The results indicate that the mechanical performace of welding sopt is better when aluminiun powder as additive, the diffusion of elements and alloying reaction are conducive to improve the machanical property of welding spot.