激光除锈是时下一种非常热门的金属表面清洗工艺，在HT200表面除锈领域具有巨大的发展前景。采用1 064 nm波长的脉冲激光器，通过激光除锈的机制和模型从原理上分析了激光功率、激光频率、扫描速度和扫描次数对激光除锈效果的影响。通过观察清洗后的HT200表面元素含量和扫描电镜观察论证了激光除锈的良好效果。通过硬度和表面粗糙度测量发现在激光作用下HT200表面产生硬化，并且HT200表面达到精加工的标准，清洗等级达到Sa 2.5，从而达到理想的激光清洗效果。

As a very popular metal surface cleaning process nowadays, Laser de-rusting is great development prospect in the field of rust removal on the surface of HT200. A 1 064 nm wavelength of pulsed fiber laser have been investigated in this experiment, the influence of laser power, laser frequency, scanning speed and scanning times on rust removing effects have been studied by the by the mechanism and model of laser de-rusting in this article. The good effect of laser de-rusting was demonstrated by observing the content of elements on the surface of HT200 and scanning electron microscope observation after cleaning. Hardness and surface roughness measurements show that hardening occurs on the surface of HT200 under the action of laser, and the surface of HT200 reaches the standard of finishing, and the cleaning grade reaches Sa 2.5, thus achieving the ideal laser cleaning effect.