化学钢化玻璃的激光焊接及其机械强度

摘要/Abstract

摘要： 超短脉冲激光因具有加工精度高、热影响区小、效率高等优点,在玻璃焊接领域有着广阔的发展前景。在实际场景中玻璃往往通过强化提升自身强度,以满足其应用的可靠性。本文利用红外超短脉冲激光成功实现化学钢化玻璃之间的焊接,通过显微镜观察焊点形状,总结出了焊接功率、频率、速度与焊点尺寸的回归方程,并验证了回归方程的准确性。结果表明:在焊接频率为500 kHz、焊接速度为10 mm/s条件下,随着焊接功率升高,焊接化学钢化玻璃的机械强度先增大后减小,化学钢化玻璃焊接剪切应力最大可达11.09 MPa,拉伸应力最大可达7.10 MPa;激光焊接时化学钢化玻璃不仅受到本身热膨胀的压力还叠加了张应力,更容易造成周围区域的破坏。

关键词: 化学钢化玻璃, 玻璃焊接, 红外飞秒激光, 机械强度, 非线性吸收, 热膨胀

Abstract: Ultra-short pulse laser has broad development prospects in the field of glass welding due to its unique advantages of high processing accuracy, small heat affected zone and high efficiency. In practical scenarios, glass often needs to enhance itself strength through strengthening to meet the reliability of its application. This article successfully realizes welding between chemically tempered glass using infrared ultra-short pulse laser. By observing the shape of welding spot with microscope, the regression equation of welding power, frequency, speed and laser welding joint size was summarized, and the accuracy of regression equation was verified. The results show that under the conditions of welding frequency 500 kHz and welding speed 10 mm/s, as the welding power increases, the mechanical strength of welding chemically tempered glass increases first and then decreases. The maximum shear stress of welding chemically tempered glass can reach 11.09 MPa, and the maximum tensile stress can reach 7.10 MPa. During laser welding, the chemically tempered glass is not only subjected to its own thermal expansion pressure but also superimposed tensile stress, so it is easier to cause damage to surrounding area.

Key words: chemically tempered glass, glass welding, infrared femtosecond laser, mechanical strength, nonlinear absorption, thermal expansion

中图分类号:

TQ171

曾新昌, 丁原杰, 刘传亮, 陈凌, 叶舒. 化学钢化玻璃的激光焊接及其机械强度[J]. 硅酸盐通报, 2023, 42(11): 4146-4153.

ZENG Xinchang, DING Yuanjie, LIU Chuanliang, CHEN Ling, YE Shu. Laser Welding of Chemically Tempered Glass and Its Mechanical Strength[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(11): 4146-4153.

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