利用纳秒脉冲激光诱导304不锈钢表面进行着色试验, 分析了纳秒激光诱导不锈钢表面着色的机理。首先, 通过激光器直接加工不锈钢样品表面, 研究了加工面积对着色均匀性的影响; 其次, 在标记中心处和偏离标记中心不同距离处进行小面积着色, 探究偏离标记中心距离对样本着色效果的影响; 最后, 利用激光器循环打标, 多轴数控平台往复运动进行着色效果改善试验。结果表明, 样品加工面积能够影响不锈钢表面着色的效果, 减小样品的加工面积可以使颜色更均匀; 随着偏离标记中心距离的增加, 样品表面的着色稳定性变差; 通过引入多轴数控平台辅助激光着色, 可有效提高不锈钢表面着色的稳定性, 降低色差值。

In this paper, nanosecond pulsed laser-induced 304 stainless steel surface is used to conduct coloring experiments, and the mechanism of nanosecond laser-induced stainless steel surface coloring is analyzed. Firstly, the laser directly processes the surface of stainless steel samples to study the effect of processing area on the coloring uniformity. Small areas are colored at different distances from the center of the mark, and the effect of the distance from the center of the mark on the coloring effect of the sample is explored. Finally, the laser is used for cyclic marking, and the multi-axis CNC platform reciprocates to improve the coloring effect. Results show that the processing area of the sample can affect the coloring effect of the stainless steel surface, and reducing the processing area of the sample can make the color more uniform. With the increase of the distance from the center of the mark, the coloring stability of the surface of the sample becomes worse. By introducing a multi-axis CNC platform to assist laser coloring can effectively improve the stability of stainless steel surface coloring and reduce the color difference value.