316不锈钢焊点的激光扫描修饰工艺研究

Technical Study on Laser Scanning of 316 Stainless Steel Welding

采用纳秒激光对厚度0.2 mm的316不锈钢进行搭接焊接,然后对焊点表面进行激光扫描修饰。通过对扫描修饰参数激光功率、激光频率、扫描速度进行三因素三水平正交试验,得知当激光功率25 W、激光频率600 kHz、扫描速度1 500 mm/s时,焊点余高28.7μm。对焊点进行切片分析,结果表明,激光扫描修饰后,焊接过程中产生的黑色氧化层被修饰,焊点余高降低,且焊点外观不发黄、不发黑,满足生产要求。

Nanosecond pulse laser was used to lap weld 316 stainless steel with 0.2 mm thickness, then was used to scan modified the appearance of spots. Through orthogonal experiment for laser scanning process parameters, it was known that when laser power was 25 W, pulse frequency was 600 kHz, scaning speed was 1 500 mm/s, residual height of spots was 28.7 μm, and appearance of spots were not yellowing and blackening, which met requirements of production. Cross section analyzed results showed that after laser scanning, oxide layer produced during welding was removed, residual height of spots was decreased, and appearance was been changed to no yellow, no black.