| 激光参量对碳钢表面清洗质量的影响 |
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| 引用本文： | 吴勇华,任晓晨,刘皓贤,闫永君,康献民.激光参量对碳钢表面清洗质量的影响[J].激光技术,2021,45(4):500-506. |
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| 作者姓名： | 吴勇华 任晓晨 刘皓贤 闫永君 康献民 |
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| 作者单位： | 1.五邑大学 智能制造学部 激光技术研究中心，江门 529020 |
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| 摘 要： | 为了研究激光工艺参量对碳钢表面锈蚀污染层清洗质量的影响规律，采用Nd∶ YAG准连续激光器对Q235钢板试样进行了激光除锈清洗试验，并观测了试样表面清洗质量。分析了激光清洗污染物烧蚀的工作机理，并试验研究了激光能量密度、扫描速率、扫描宽度、离焦量和重复频率等工艺参量对清洗质量的影响，在此基础上进行了正交试验；通过对激光清洗前后试件进行表面粗糙度、形貌和能谱分析，获得了Q235钢最佳激光工艺参量分别为扫描速率900mm/min、离焦量1mm、能量密度7.6J/cm2、扫描宽度30mm。结果表明，激光除锈后表面粗糙度和3维形貌得到改善，激光清洗样品的粗糙度值接近无锈样品，激光清洗样品的形貌与无锈样品基本相同；激光清洗后材料表面的锈蚀层基本去除，表面存在重焰的微结构。激光清洗能满足对碳钢表面锈蚀污染层的清洗质量要求。
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| 关 键 词： | 激光技术 激光清洗 除锈 Q235钢 激光参量 污染物 |
| 收稿时间： | 2020-08-03 |
Influences of laser parameters on the cleaning quality of carbon steel surface |
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| Abstract: | In order to study the influence of laser process parameters on the cleaning quality of carbon steel surface contaminant layer, the Nd∶ YAG quasi continuous laser was used to clean the surface rust contaminant of Q235 steel sample. The effect of laser cleaning on the sample surface was observed, and the working mechanism of laser cleaning contaminant ablation was analyzed. Then the cleaning effects and the cleaning quality with different process parameters such as laser energy density, cleaning rate, scanning width, defocusing amount, and repetition frequency were studied experimentally, and based on this, the orthogonal test was carried out to obtain the optimum laser process parameters to the Q235 steel; three-dimensional morphology, scanning electron microscopy, and energy spectrum were conducted to analyse the cleaning effect. And the optimal process parameters were obtained: Laser cleaning rate is 900mm/min, defocusing amount is 1mm, energy density is 7.6J/cm2, scanning width is 30mm respectively. Research shows that the surface roughness and three-dimensional morphology of the laser cleaning samples are improved, the roughness value of the laser cleaning samples is close to that of the rust-free samples, and the morphology of the laser cleaning samples is basically the same as that of the rust-free samples; after laser cleaning, the rust layer on the surface of the material is basically removed, and there are remelted microstructures on the surface. It can be concluded that laser cleaning can meet the cleaning quality requirements for carbon steel. |
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