本发明公开了一种薄规格钛钢层状复合板的搅拌摩擦焊方法。首先采用爆炸轧制复合工艺制备钛钢复合板，钢厚度大于钛板厚度。焊接前，根据复合板的尺寸选择热输入量，计算出轴间压力及压下量、搅拌头旋转速度和焊接速度。焊接时，复合板同种材料彼此对接。将热输入量控制在9~20 kJ/mm，搅拌头旋转速度为300~500 r/min，焊接速度为40~60 mm/min，搅拌头轴间下压量为0.1~0.2 mm，小于钛层厚度。该发明方法与传统材料熔化焊相比，避免了缩孔、夹杂、裂纹等一系列焊接缺陷，减少Fe-Ti金属间化合物的形成，获得了外表美观、飞边毛刺缺陷少、尺寸精度高、质量好的焊接接头，实现了薄规格钛钢层状复合板的有效连接。

The invention discloses a friction stir welding method for a thin titanium steel laminated composite plate. The titanium steel composite plate was prepared by explosive rolling, and the thickness of the steel was larger than that of the titanium plate. Before welding, the heat input is selected according to the size of the composite plate, and the pressure between the shafts and the pressure down, the rotation speed of the mixing head and the welding speed are calculated. During welding, the same materials of the composite plate are butted with each other. The heat input was controlled at 9~20 kJ/mm, the rotation speed of the stirring head was 300~500 r/min, the welding speed was 40~60 mm/min, and the pressure between the shafts of the stirring head was 0.1~0.2 mm, which was less than the thickness of titanium layer. Compared with the traditional fusion welding, the invention avoids a series of welding defects such as shrinkage cavity, inclusion and crack, reduces the formation of Fe-Ti intermetallic compounds, and obtains the welding joints with beautiful appearance, less fly-edge burr defects, high dimensional accuracy and good quality, and realizes the effective connection of thin titanium steel laminar composite plates.