Scholarlink

<p>Off-axis powder feeding laser cladding has been widely applied in industry due to its simple structure and low cost of the cladding head. However, it suffers from low powder utilization rate and poor stability during the cladding process, making it difficult to control the cladding quality precisely. Effectively revealing the interaction mechanism between light and powder, as well as the powder jet behavior, in the off-axis powder feeding laser cladding process is of great significance for improving cladding quality. Therefore, in this paper, a continuous-discrete phase coupling model of the interaction between light and powder in the Fe31 off-axis powder feeding laser cladding process of 45 steel was established. The effects of working distance, carrier gas flow velocity, and protective gas flow velocity on the temperature increase and velocity of the powder were investigated. The cladding process parameters are optimized by the orthogonal test method to improve the powder utilization rate. The results show that the powder velocity is negatively correlated with the protective gas flow velocity and the working distance. When the working distance increases by 1.5&#xa0;mm, the maximum particle velocity decreases by approximately 5.9%. Finally, the temperature of the powder was measured at multiple points using an infrared thermal imaging camera, and the model was verified by comparing the cladding profile, the errors of the two are 1.88% and 1.42% respectively, the microhardness of the optimized cladding layer increased by 8%. This study provides a theoretical basis for improving the quality of off-axis powder feeding cladding.</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 the mechanism of light-powder interaction and powder jet behavior in Fe31 laser cladding with off-axis powder feeding on 45 steel

  • 期刊论文

  • 发表日期：

    2025年11月5日

查看全文
  • Yuhao Wang,
  • Chang Li,
  • Jiabo Liu,
  • Weiwei Ge,
  • Xing Han

摘要

Off-axis powder feeding laser cladding has been widely applied in industry due to its simple structure and low cost of the cladding head. However, it suffers from low powder utilization rate and poor stability during the cladding process, making it difficult to control the cladding quality precisely. Effectively revealing the interaction mechanism between light and powder, as well as the powder jet behavior, in the off-axis powder feeding laser cladding process is of great significance for improving cladding quality. Therefore, in this paper, a continuous-discrete phase coupling model of the interaction between light and powder in the Fe31 off-axis powder feeding laser cladding process of 45 steel was established. The effects of working distance, carrier gas flow velocity, and protective gas flow velocity on the temperature increase and velocity of the powder were investigated. The cladding process parameters are optimized by the orthogonal test method to improve the powder utilization rate. The results show that the powder velocity is negatively correlated with the protective gas flow velocity and the working distance. When the working distance increases by 1.5 mm, the maximum particle velocity decreases by approximately 5.9%. Finally, the temperature of the powder was measured at multiple points using an infrared thermal imaging camera, and the model was verified by comparing the cladding profile, the errors of the two are 1.88% and 1.42% respectively, the microhardness of the optimized cladding layer increased by 8%. This study provides a theoretical basis for improving the quality of off-axis powder feeding cladding.