Laser cleaning technology was used to clean the surface of stainless steel, and the influence of different laser power (300 W, 400 W, 500 W) on cleaning effect was studied. The surface morphology and composition distribution of stainless steel were analyzed by SEM and EDS. The surface roughness and cleaning thickness were detected by White Light Interferometer. The results show that, with the increase of laser power, the oxide of stainless steel decomposes and flakes gradually, and the cleaning thickness keeps deepening and reaches 50 μm at 500 W,which causes partial damage to the matrix. The roughness value decreases firstly and then increases. It reaches a minimum value of 0.38 μm at 400 W. Laser cleaning threshold is approximately 3.96×103 W/cm2, and damage threshold is about 5.52×103 W/cm2. The best laser cleaning effect of stainless steel is obtained when the power is 400 W.%利用激光清洗技术对不锈钢表面进行清洗试验,研究不同激光功率(300 W、400 W、500 W)对清洗效果的影响.通过SEM和EDS分析不锈钢表面清洗前后的表面形貌及成分分布;利用白光干涉仪检测不锈钢表面粗糙度及清洗厚度.结果表明,随着激光功率的增加,不锈钢表面氧化物逐渐分解剥落,清洗厚度不断加深,在500 W时达到50μm,并且造成基体部分损伤;粗糙度值先降低后增加,在400 W时达到最低值0.38μm.激光清洗的清洗阈值近似为3.96×103 W/cm2,基体损伤阈值在5.52×103 W/cm2左右,不锈钢表面氧化层在400 W时达到最佳激光清洗效果.
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