Study on Laser Cleaning Process of Marine Carbon Steel Shop Primer
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摘要: 针对船用碳钢表面富锌车间底漆清理需求,开展了激光除漆工艺试验,分析了搭接率、激光功率、扫描速度等工艺参数对清洗前后组织形貌、硬度及拉伸性能的影响规律,获得了船用碳钢激光清洗工艺窗口。结果表明,对于船用EH36钢,在25 W的低功率条件下,车间底漆清理效果十分有限。当功率提高到50~100 W,清洗2~3次后碳钢表面露出亮白金属色。随着扫描速度的减小,对材料表面的清洗会加强,甚至损伤。激光清洗会使样品表面出现熔化现象,改变样品的表面粗糙度,但是,不会显著削减样品的表面材料,对样品组织及力学性能几乎没有影响。该试验可为今后激光清洗工艺在船舶碳钢除漆的实际应用提供相应指导和参考。Abstract: Aiming at the cleaning requirements of Zn-rich shop primer on marine carbon steel surface, laser paint removal process tests are carried out. The effects of laser cleaning parameters on micro-structure, hardness and tensile properties are analyzed, and the laser cleaning process window of marine carbon steel obtained. The results show that the cleaning effect is very limited at the power of 25 W. When the power increases to 50~100 W, the surface presents bright white metallic color after being cleaned for 2~3 times. As the scanning speed decreases, the cleaning effect will be strengthened, and even damage could be caused. Laser cleaning can lead to the melting of surface and change the surface roughness of the sample, but it will not significantly reduce the performances of the surface material, and has almost no effect on its micro-structure and mechanical properties. The results can provide guidance and reference for the practical application of laser cleaning technology in marine carbon steel paint removal in the future.
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Key words:
- laser technology /
- nanosecond pulse laser /
- laser cleaning /
- EH36 steel
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