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<p>To meet the extreme corrosion resistance requirements of deep-sea API 5&#xa0;L X65 carbon steel pipelines, this study utilizes the Box-Behnken response surface methodology to optimize the laser cladding of Inconel 625. Unlike previous studies focused on single-performance metrics, this research provides a novel coordinated regulation of multi-factor interactions to control interface martensite thickness. By establishing a quadratic regression model (R-squared = 0.9484), we systematically explored the effects of laser power, scanning speed, and powder feeding rate. Results indicate the powder feeding rate most significantly impacts cladding thickness (<i>P</i> &lt; 0.0001), while its interaction with scanning speed (<i>P</i> = 0.0422) is critical for geometric regulation. The optimized parameters—1910&#xa0;W laser power, 1365&#xa0;mm/min scanning speed, and 0.47 r/min powder feeding rate—yielded an ideal 1&#xa0;mm cladding thickness. This precise control window produces refined dendrites and a stable 50–60&#xa0;μm martensite layer, offering highly reliable process parameters for pipeline remanufacturing.</p>

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Optimization of inconel 625 laser cladding on X65 steel via response surface methodology

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年5月2日

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  • Zheng Zhang,
  • Yong Pan,
  • Qinwei Yu,
  • Zhenmin Zhang,
  • Feng Cao

摘要

To meet the extreme corrosion resistance requirements of deep-sea API 5 L X65 carbon steel pipelines, this study utilizes the Box-Behnken response surface methodology to optimize the laser cladding of Inconel 625. Unlike previous studies focused on single-performance metrics, this research provides a novel coordinated regulation of multi-factor interactions to control interface martensite thickness. By establishing a quadratic regression model (R-squared = 0.9484), we systematically explored the effects of laser power, scanning speed, and powder feeding rate. Results indicate the powder feeding rate most significantly impacts cladding thickness (P < 0.0001), while its interaction with scanning speed (P = 0.0422) is critical for geometric regulation. The optimized parameters—1910 W laser power, 1365 mm/min scanning speed, and 0.47 r/min powder feeding rate—yielded an ideal 1 mm cladding thickness. This precise control window produces refined dendrites and a stable 50–60 μm martensite layer, offering highly reliable process parameters for pipeline remanufacturing.