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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。
Using nanosecond pulsed laser to color the surface of 304 stainless steel, the thermal effect model of laser on metal surface was established. The influence of laser heat on the surface coloring of 304 stainless steel was analyzed by EDAX. Oxidation of metal surface under different thermal processes. The results show that there are two different mechanisms in the process of nanosecond laser color coloration: “direct laser pulse process” and “laser pulse diffusion heat process”. The stainless steel surface is more likely to produce Cr oxide in the “direct laser pulse direct process” of rapid heating and rapid cooling; the surface of stainless steel is more likely to produce Fe in the diffusion-dominated “laser pulse diffusion thermal process” Oxide.