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<p>This paper conducts laser cleaning experiments on a nickel-based high-temperature metal coating on the surface of 45 steel using a nanosecond pulsed laser. The experimental approach is employed to investigate the influence of various parameters (laser power, laser pulse width, spot overlap rate, and line spacing) on the cleaning effectiveness of the metal coating surface. The cleaning effectiveness is evaluated by observing key indicators, including the surface and cross-sectional morphology of the metal coating after cleaning, the removal thickness, and the surface hardness post-cleaning. The research results indicate that, based on both orthogonal experiment and range analysis methods, the spot overlap rate, laser power, line spacing, and laser pulse width have successively decreasing impacts on the removal capability of the metal coating. Additionally, within the parameter range studied in this research, the optimal parameter combination is identified as a laser power of 200&#xa0;W, a laser pulse width of 20&#xa0;ns, a spot overlap rate of 75%, and a line spacing of 0.01&#xa0;mm. Furthermore, through single-factor experiments, it is found that when the laser power is 200&#xa0;W, the line spacing is 0.01&#xa0;mm, the spot overlap rate is 95%, and the laser pulse width is 10&#xa0;ns, effective removal of the coating can be achieved, and the microhardness reaches its maximum values, respectively.</p>

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A Study on the Influence of Laser Parameters on the Cleaning Effect of Metal Coatings

  • 期刊论文

  • 发表日期：

    2025年10月27日

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  • Heng Han,
  • Weiguang Liu,
  • Kai Zhang

摘要

This paper conducts laser cleaning experiments on a nickel-based high-temperature metal coating on the surface of 45 steel using a nanosecond pulsed laser. The experimental approach is employed to investigate the influence of various parameters (laser power, laser pulse width, spot overlap rate, and line spacing) on the cleaning effectiveness of the metal coating surface. The cleaning effectiveness is evaluated by observing key indicators, including the surface and cross-sectional morphology of the metal coating after cleaning, the removal thickness, and the surface hardness post-cleaning. The research results indicate that, based on both orthogonal experiment and range analysis methods, the spot overlap rate, laser power, line spacing, and laser pulse width have successively decreasing impacts on the removal capability of the metal coating. Additionally, within the parameter range studied in this research, the optimal parameter combination is identified as a laser power of 200 W, a laser pulse width of 20 ns, a spot overlap rate of 75%, and a line spacing of 0.01 mm. Furthermore, through single-factor experiments, it is found that when the laser power is 200 W, the line spacing is 0.01 mm, the spot overlap rate is 95%, and the laser pulse width is 10 ns, effective removal of the coating can be achieved, and the microhardness reaches its maximum values, respectively.