纳秒激光不锈钢着色过程中的热作用及氧化规律

利用纳秒级脉冲激光对304不锈钢表面进行着色试验, 建立激光作用于金属表面的热作用模型, 利用EDAX分析着色不锈钢表面金属元素质量比变化, 探究激光热作用对304不锈钢表面着色效果的影响及不同热作用过程下的金属表面氧化的规律。结果表明: 纳秒激光金属彩色着色过程中存在“激光脉冲直接作用过程”和“激光脉冲扩散热作用过程”两个不同机制的热作用过程。在快速加热和快速冷却的“激光脉冲直接作用过程”中不锈钢表面更容易产生Cr氧化物; 在以扩散热为主导的“激光脉冲扩散热作用过程”中不锈钢表面更容易产生Fe氧化物。

Abstract

In order to study the heat interaction rule and the oxidation pattern of color marking on stainless steel by nanosecond laser, experiments on color marking for 304 stainless steel were studied by using nanosecond pulsed laser, the heat treatment model of laser color marking on metal was correspondingly established, and the analysis of the elemental differences on coloring regions by using EDAX were made. It was found that there were two obvious different thermal processes in the nanosecond laser metal color marking, which were “laser pulse direct action process” and “laser pulse diffusion heat process”. Correspondingly, It was easier to generate Cr oxide on a stainless steel surface in the direct action process, which experienced fast heating and rapid cooling; while it was easier to generate Fe oxide on a stainless steel surface in the diffusion heat process.

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刘忠民, 郭亮, 张庆茂. 纳秒激光不锈钢着色过程中的热作用及氧化规律[J]. 应用激光, 2017, 37(4): 563. Liu Zhongmin, Guo Liang, Zhang Qingmao. Study on Heat Interaction Rule and Oxidation Pattern of Color Marking on Stainless Steel by Nanosecond Laser[J]. APPLIED LASER, 2017, 37(4): 563.

纳秒激光不锈钢着色过程中的热作用及氧化规律

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