激光与光电子学进展, 2017, 54 (1): 011402, 网络出版: 2017-01-17
高温合金激光环切打孔技术
Technology in Laser Trepanning of Superalloys
激光技术 激光环切 GH4037高温合金 环切速度 环切圈数 laser technique laser trepanning GH4037 superalloy trepanning velocity trepanning times
摘要
采用控制变量法对GH4037高温合金进行了激光环切打孔实验, 得到了脉冲能量、离焦量、环切速度、环切圈数对小孔锥度和上下孔径的影响规律。结果表明, 脉冲能量和离焦量对小孔孔径和锥度的影响较大, 而环切速度和环切圈数主要影响小孔的形貌。离焦量的绝对值越大, 热影响区、上孔径和锥度也越大; 增加环切圈数及适当的环切速度(3~6 mm/min)有助于提升小孔的质量, 使孔口堆积物减少, 且孔的圆度较好。
Abstract
The parameter control method is utilized to carry out the experimental investigation on laser trepanning of GH4037 superalloy and the trend in the effects of pulse energy, defocusing amount, trepanning velocity, and trepanning times on the hole taper and entry-exit-hole diameter is achieved. The results indicate that the pulse energy and defocusing amount obviously influence the hole diameter and taper angle, while the trepanning velocity and trepanning times mainly influence the hole morphology. The larger the defocusing amount is, the larger the heat-affected zone, entry hole diameter, and taper angle are. Increasing trepanning times and selecting appropriate trepanning velocity (3-6 mm/min) are helpful to improve the hole quality, reduce the accumulations around hole aperture, and improve the hole roundness.
钱晓忠, 张丽, 任乃飞. 高温合金激光环切打孔技术[J]. 激光与光电子学进展, 2017, 54(1): 011402. Qian Xiaozhong, Zhang Li, Ren Naifei. Technology in Laser Trepanning of Superalloys[J]. Laser & Optoelectronics Progress, 2017, 54(1): 011402.