为解决传统玻璃焊接技术中添加焊料带来的易腐蚀、易老化等问题, 用超短脉冲激光实现了无焊料添加的玻璃叠焊效果, 并用3D显微镜、拉力仪、维氏硬度仪对焊接玻璃进行微观形貌、拉伸剪切强度、断口维氏硬度检测, 得出研究结果: 用50 W皮秒激光器对钠钙硅酸盐玻璃进行焊接,选用振镜走点阵的加工工艺解决了线阵加工中激光作用点间距过于紧密的问题, 实现了无焊料添加的玻璃叠焊效果。实现这一焊接的机理是超短脉冲激光引起玻璃的非线性吸收作用的强弱受激光重频和单脉冲能量以及阈值时间的影响, 调节合适的激光参数可实现最佳的焊接效果。当加工参数为重频120 kHz、电流100%、点阵间距0.02 mm时, 焊接玻璃承受的最大拉力达到157 N, 焊接效果最佳。

In order to solve the problems of easy corrosion, easy aging caused by the traditional glass welding technology with solder, transmission welding using a ultra short pulsed laser realized the glass welding effect without solder. To investigate the morphology and mechanical properties of the weld zone, the microstructure observation, tensile shear strength test and fracture dimension hardness test were performed on the welded joint using 3D microscopy, tensile tester, hardness tester. The results show transmission welding using a picosecond laser of 50 W with the process technology of the galvanometer going lattice realized the glass welding effect without solder, using the common soda lime silicate glass as the specimen, solving the problem of laser distance too close caused by linear array processing. The mechanism is that the nonlinear absorption of glass induced by ultra short pulsed laser is influenced by the strength of laser, single pulse energy and time threshold effect, thus the best welding effect can be realized due to suitable laser parameters. When, the maximum tensile strength reached 157 N, the glass welding effect is the best with the processing parameters of the heavy frequency 120 kHz, current 100%, lattice spacing 0.02 mm.