Li Pin, Xu Xingwen, Tan Wensheng, Liu Huixia, Wang Xiao
School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200000, China.
School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China.
Materials (Basel). 2018 Oct 22;11(10):2060. doi: 10.3390/ma11102060.
Laser surface treatment of the titanium alloy was locally oxidized on the metal surface to improve the joint strength of laser transmission welding of high borosilicate glass with titanium alloy. The results find that the welding strength was increased 5 times. The welding mechanism was investigated by the morphology of the welded parts, the tensile-fracture failure mode, the diffusion of the interface elements, and the surface free energy. The results show that there are many adherents between the titanium alloy and high borosilicate glass after tensile fracture, the welding strength was higher when the laser voltage was 460 V, and the tensile⁻fracture failure mode is mainly ductile fracture. Element-line scanning analysis revealed that elemental diffusion occurred in the two materials, which is an important reason for the high welding strength. Surface free-energy analysis shows that laser surface treatment improves the surface free energy of titanium alloy, promotes the wettability and compatibility, and increases the welding strength of titanium alloy with glass.
对钛合金进行激光表面处理，使其金属表面局部氧化，以提高高硼硅玻璃与钛合金激光透射焊接的接头强度。结果发现焊接强度提高了5倍。通过焊接部件的形貌、拉伸断裂失效模式、界面元素扩散和表面自由能对接焊机制进行了研究。结果表明，拉伸断裂后钛合金与高硼硅玻璃之间有许多附着物，激光电压为460V时焊接强度较高，拉伸断裂失效模式主要为韧性断裂。元素线扫描分析表明，两种材料之间发生了元素扩散，这是焊接强度高的重要原因。表面自由能分析表明，激光表面处理提高了钛合金的表面自由能，促进了润湿性和相容性，提高了钛合金与玻璃的焊接强度。
