100W脉冲激光器冷轧钢板表面氧化膜清洗

Cleaning of oxide film on cold rolled steel plate with 100W pulse laser

金属材料表面的附着物常常会影响机械的正常工作,常见的有氧化膜,锈迹,油污和其他杂质,激光清洗作为时下一种常用的金属表面清洗技术,广泛应用在工业清洗中。本文所用实验材料冷轧钢板由于长期暴露在空气中,常常会附着一层氧化膜,随着时间的增长,氧化膜会发生复杂的化学反应,导致表面不止一层氧化膜。在复杂的工作环境中形成的氧化膜,如氧化亚铁,高温会让氧化亚铁发生氧化反应,于是氧化膜变成了三层,分别是三氧化二铁,四氧化三铁,氧化亚铁。本文采用1064 nm波长的100 W激光清洗机对冷轧钢板表面氧化层进行清洗,通过调整功率,频率,扫描速度,扫描次数等参数,观察清洗后的表面元素含量和表面粗糙度发现激光清洗效果较好,与基材表面一致。

Laser cleaning is a common metal surface cleaning technology.The attachment on the surface of metal materials often affects the normal operation of the machine.The common ones are oxide film,rust,oil and other impurities.Due to long-term exposure to the air,a layer of oxide film is often attached to the cold-rolled steel plate used in this paper.With the growth of time,the oxide film will have complex chemical reactions,resulting in more than one oxide film on the surface.The oxide film formed in the working environment,such as ferrous oxide,will oxidize ferrous oxide at high temperature,so the oxide film becomes three layers,namely,Fe2O3,Fe3O4 and Fe2O3.In this paper,a 100W laser cleaning machine with 1064 nm wavelength was used to clean the oxide layer on the surface of cold rolled steel plate.By adjusting the parameters such as power,frequency,scanning speed and scanning times,the surface element content and surface roughness after cleaning were observed.It was found that the laser cleaning effect was better,which was consistent with the base material surface.