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<p>Understanding the thermal behaviour of rough materials exposed to short-pulsed laser beams and predicting the surface roughness of laser-polished materials are challenging. In this study, a model for nanosecond pulsed laser polishing of SKD11 steel based on its surface roughness was built and verified experimentally. The initial surface roughness of the steel was determined based on the N8 level specified in the ISO 1302:2002 standard, and the morphology of the polished surface was analysed based on the surface temperature and heat-affected zones by applying a single pulse and via multiple pulses. The final SKD11 steel polishing efficiency was predicted by systematically examining the laser power, pulse width, and pulse repetition frequency. The high alignment between the simulation and experimental results validated the proposed model as well as confirmed the reliability of the research method employed and the efficacy of polishing SKD11 steel using nanosecond lasers.</p>

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Modelling and analysis of nanosecond laser polishing for skd11 steel with surface roughness prediction and optimization

  • 期刊论文

  • 发表日期：

    2025年5月22日

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  • Van-Van Le,
  • Hai-Duong Nguyen,
  • Thanh-Tung Vu,
  • Nguyen-Hung Tran,
  • Thai-Tat-Hoan Nguyen,
  • Van-Thuc Tran,
  • Quang-Hung Trinh

摘要

Understanding the thermal behaviour of rough materials exposed to short-pulsed laser beams and predicting the surface roughness of laser-polished materials are challenging. In this study, a model for nanosecond pulsed laser polishing of SKD11 steel based on its surface roughness was built and verified experimentally. The initial surface roughness of the steel was determined based on the N8 level specified in the ISO 1302:2002 standard, and the morphology of the polished surface was analysed based on the surface temperature and heat-affected zones by applying a single pulse and via multiple pulses. The final SKD11 steel polishing efficiency was predicted by systematically examining the laser power, pulse width, and pulse repetition frequency. The high alignment between the simulation and experimental results validated the proposed model as well as confirmed the reliability of the research method employed and the efficacy of polishing SKD11 steel using nanosecond lasers.