纳秒脉冲激光清洗石化设备对清洗表面的影响

Effect of nanosecond pulse laser cleaning petrochemical equipment on cleaning surface

采用纳秒脉冲激光对石化设备普遍使用的20钢表面锈蚀层以及油污进行了激光清洗试验,通过正交实验法得到优化后的激光清洗工艺参数,在激光功率18 W,激光脉冲重复频率75kHz,扫描速度3000mm/s的清洗工艺参数下可有效去除20钢表面的锈蚀层;在激光功率20 W,激光脉冲重复频率75 kHz,扫描速度2250 mm/s的清洗工艺参数下可有效去除20钢表面附着的油污。分析了激光清洗前后材料表面形貌的变化,研究了激光清洗前后表面的显微硬度以及耐腐蚀性,结果表明:激光清洗可以在不改变材料的耐腐蚀性能的同时提升材料表面的显微硬度,从而达到理想的激光清洗效果。

The nanosecond pulse laser is used to clean the corrosion layer and oil stain on the surface of 20 steel commonly used in petrochemical equipment.The optimized laser cleaning process parameters are obtained by orthogonal experiment.Under the cleaning process parameters of laser power 18 W,laser pulse repetition frequency 75 kHz,scanning speed 3000 mm/s,the rust layer on the surface of 20 steel can be effectively removed.Under the cleaning process parameters of laser power 20 W,laser pulse repetition rate 75 kHz and scanning speed 2250 mm/s,the oil stains attached to the surface of 20 steel can be effectively removed.The changes of material surface morphology before and after laser cleaning are analyzed,and the surface microhardness and corrosion resistance before and after laser cleaning are studied.The results show that laser cleaning can improve the microhardness of material surface without changing the corrosion resistance of material,so as to achieve the ideal laser cleaning effect.