Scholarlink

<p>This paper establishes a three-dimensional numerical simulation model for the cladding process of Fe60 alloy powder onto a 27SiMn steel substrate, simultaneously coupling the temperature field, flow field, and stress field. The isotherms are densely distributed at the leading edge of the melt pool, and the thermal cycle curves of each clad layer exhibit multiple peaks, indicating remelting between adjacent layers. Within the melt pool, the liquid metal forms vortices flowing from the center outward and from the surface inward, from the bottom to the surface. This flow pattern is primarily caused by the combined effects of surface tension, gravity, and thermal buoyancy on the liquid metal. The stress at the center of the melt pool is the lowest, approaching zero. The thermal stress during the cladding process follows a tensile-compressive-tensile variation pattern, and the substrate exhibits concave deformation after cladding. Based on the central composite design (CCD) response surface method (RSM), the scanning speed was identified as the most influential parameter affecting substrate deformation. Within the given parameter range, scanning speed is negatively correlated with deformation magnitude; laser power is positively correlated with deformation magnitude; when the overlap ratio <i>R</i> &lt; 50%, the overlap ratio is positively correlated with deformation magnitude; when the overlap ratio <i>R</i> &gt; 50%, the overlap ratio is negatively correlated with deformation magnitude. The optimal process parameters were determined to be laser power <i>P</i> = 2000 W, scanning speed V = 25 mm/s, and overlap ratio <i>R</i> = 60%.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Study on warping deformation of high-speed laser cladding substrate based on response surface method

  • 期刊论文

  • 发表日期：

    2025年11月17日

查看全文
  • Shirui Guo,
  • Daolin Zhu,
  • Lujun Cui,
  • Yinghao Cui,
  • Xiaolei Li,
  • Yongqian Chen,
  • Yue Zhao,
  • Jialin Liu,
  • Bo Zheng

摘要

This paper establishes a three-dimensional numerical simulation model for the cladding process of Fe60 alloy powder onto a 27SiMn steel substrate, simultaneously coupling the temperature field, flow field, and stress field. The isotherms are densely distributed at the leading edge of the melt pool, and the thermal cycle curves of each clad layer exhibit multiple peaks, indicating remelting between adjacent layers. Within the melt pool, the liquid metal forms vortices flowing from the center outward and from the surface inward, from the bottom to the surface. This flow pattern is primarily caused by the combined effects of surface tension, gravity, and thermal buoyancy on the liquid metal. The stress at the center of the melt pool is the lowest, approaching zero. The thermal stress during the cladding process follows a tensile-compressive-tensile variation pattern, and the substrate exhibits concave deformation after cladding. Based on the central composite design (CCD) response surface method (RSM), the scanning speed was identified as the most influential parameter affecting substrate deformation. Within the given parameter range, scanning speed is negatively correlated with deformation magnitude; laser power is positively correlated with deformation magnitude; when the overlap ratio R < 50%, the overlap ratio is positively correlated with deformation magnitude; when the overlap ratio R > 50%, the overlap ratio is negatively correlated with deformation magnitude. The optimal process parameters were determined to be laser power P = 2000 W, scanning speed V = 25 mm/s, and overlap ratio R = 60%.