Aiming to solve the problems such as low weld pass rate and complicated welding process when welding non-ferrous metal with large diameter (M≥12 mm) in traditional arc stud welding, the static gantry friction stir welding equipment with special stud welding fixture was used to realize the industrial pure titanium(TA2)stud welding with size M12. The macroscopic morphology, microstructure, torsional strength and microhardness of joints were analyzed under different forging displacement and forging speed. The results show that when the forging displacement is small, the hole defect appears in the center of the welding joint, and when the forging displacement is medium, the strip defect appears in the center of the welding joint, while the joint is well welded and no defect is found in the larger parameters. When the top forging displacement is 3 mm, the joint's torsional strength reaches 117 N·m. The microhardness of the area near the weld is obviously increased by forging deformation.The microhardness near the welding joint is obviously increased by forging deformation.
关键词
摩擦螺柱焊工业纯钛宏观形貌显微组织顶锻位移抗扭强度
Keywords
friction stud weldingcommercial pure titaniummacroscopic morphologymicrostructureforging displacementtorsional strength
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