激光化学复合抛光工艺参量对304不锈钢性能的影响

Effect of process parameters of laser chemical composite polishing on 304 stainless steel surface properties

为了提高304不锈钢表面抛光质量,采用激光化学复合抛光的方法分别在纯净水和抛光液中对304不锈钢进行抛光实验研究,并对1064nm激光的加工功率和扫描次数对加工区域表面形貌和表面质量的影响进行了分析。气泡对抛光液在不锈钢表面形成的钝化膜产生破坏作用,造成抛光效果不均匀,表面粗糙度增大。结果表明,在抛光液中的激光抛光在抑制表面氧化发黑的同时,能够显著改善表面形貌,表面粗糙度由0.845μm下降到0.181μm;激光化学复合抛光304不锈钢表面质量与抛光功率和扫描次数有密切关系;当抛光功率过高或者扫描次数过大时,304不锈钢表面会产生大量气泡。采用激光化学复合抛光,可以提高不锈钢抛光质量、减少环境污染,该方法具有极大的应用前景。

In order to improve the surface polishing quality of SUS 304, a laser chemical composite polishing method was proposed based on chemical polishing and laser polishing. SUS 304 was adopted as workpiece being polished by 1064nm laser in purified water and polishing solution, respectively. The influence of laser processing power and scanning times on the surface topography and quality of machined area was analyzed. The bubbles have a damaging effect on the passivation film formed on the surface of stainless steel, resulting in uneven polishing effect and increasing surface roughness. The results show that, laser polishing in polishing solution can significantly improve surface topography while suppressing surface oxidation blackening, and the surface roughness decreases from 0.845μm to 0.181μm. Laser chemical composite polishing can improve the polishing quality of stainless steel and reduce environmental pollution. This study has a great application prospect.