非金属材料激光连接工艺与接头性能研究进展

    Research Progress of Laser Bonding Process and Joint Properties of Non-metallic Materials

    • 摘要: 综述了玻璃、陶瓷、聚合物、块体金属玻璃(bulk metallic glass,BMG)等非金属之间及其与金属的激光连接工艺和接头性能的研究进展,分析了激光焊功率、焊接速度、离焦量和施加压力对接头性能的影响;对比了飞秒激光和纳秒激光对金属与玻璃接头剪切强度的影响;探究了玻璃与金属、陶瓷与金属以及陶瓷与聚合物的连接机理及其影响因素;通过添加过渡层,解决了高硼硅玻璃在可伐合金表面的开裂问题,在金属表面制备氧化膜,促进了界面结合,提高了接头性能,同时采用焊前预热和焊后缓冷热处理工艺有效降低了焊后应力,减少了裂纹的产生.

       

      Abstract: The research progress of the laser beam welding process and the properties of joints between glass, ceramic, polymer, bulk metallic glass (bulk metallic glass, BMG) and metal were reviewed in this paper. The effects of laser welding power, welding speed, defocusing amount and the pressure on the performance of the joint were analyzed. The influence of femtosecond and nanosecond laser on the shear strength of metal-glass joints was compared with each other. The bonding mechanism and key factors influencing the reliable bonding of glass and metal, ceramic and metal & ceramic and polymer were also explored. The cracking problems of the high boron silicon glass on the surface of were solved by adding the intermediate layer. The pre-oxidation of metal surface can promote interface bonding and improve joints performance. At the same time, the weld preheat and the postweld heat treatment were adopted to reduce stress and cracks.

       

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