The resistance spot welding between titanium and mild steel was carried out with and without an interlayer of Nb foil. The effect of interlayer Nb on the microstructure and performance of the joint was analyzed by comparing the two types of joints with and without interlayer. The results reveal that the part of the interlayer Nb disappeared when the welding current was above 8 kA in the selected interlayer Nb thickness of 0.1 mm. In the resistance spot welding between titanium and mild steel, the addition of the interlayer Nb can improve the microstructure and tensile shear load of the joint. When the welding current is 7 kA, the tensile shear load of the Ti/Nb/Q235 joint reaches the maximum value of 4.3 kN.

钛和低碳钢之间的电阻点焊是在有和没有 Nb 箔夹层的情况下进行的。通过比较有夹层和无夹层两种接头，分析夹层Nb对接头组织和性能的影响。结果表明，当焊接电流大于 8 kA 时，在选定的 0.1 mm 层间 Nb 厚度中，部分层间 Nb 消失。在钛与低碳钢的电阻点焊中，夹层Nb的加入可以改善接头的显微组织和拉伸剪切载荷。当焊接电流为7 kA时，Ti/Nb/Q235接头的拉伸剪切载荷达到最大值4.3 kN。