通过搅拌摩擦焊接头硬度测试,确定了焊缝两侧软化区分布区域;在软化区埋设热电偶,进行搅拌摩擦焊接实验,检测不同测温点的热循环曲线。将焊后接头进行硬度测试,确定硬度最低点位置,对应测温孔分布位置,获得软化区硬度最低点热循环曲线。 Through the friction stir welding joint hardness test, the distribution area of ​​the softening zone on both sides of the weld was determined. The thermocouple was embedded in the softening zone, and the friction stir welding experiment was carried out to test the thermal cycling curves at different temperature measuring points. After the weld joint hardness test to determine the location of the lowest hardness, corresponding to the location of the temperature hole distribution, the softening zone to obtain the lowest point of the thermal cycle curve.