激光熔覆Ni45A工艺参数敏感性分析

Sensitivity Analysis of the Process Parameters of Laser Cladding Ni45A

针对激光熔覆Ni45A成形控制问题,采用响应面中心复合设计方法,建立工艺参数与熔覆层几何特性之间的数学模型,分析激光功率、扫描速度、气流量对熔覆层几何特性的影响规律,并通过敏感性分析方法,获得熔覆层几何特性对工艺参数的敏感性。结果表明,增大激光功率,降低扫描速度,有利于增大熔高、熔宽和熔覆层面积,熔池中输入能量的大小是影响熔覆层形貌的主要因素。此外,敏感性分析表明熔覆层几何特性对激光功率最为敏感。研究结果为激光熔覆Ni45A几何特性提供了敏感特性图,为进一步有效地控制熔覆层成形质量提供了理论依据。

Aiming to explore the forming quality of Laser Cladding Ni45 A, the response surface center composite design method was adopted to establish a mathematical model between the process parameters and the geometric characteristics of the cladding layer. The influence of laser power, scanning speed, and gas flow on the geometric characteristics was analyzed. Through the sensitivity analysis method, the sensitivity of the cladding layer′s geometric characteristics to the process parameters was obtained. Results show that increasing the laser power and reducing the scanning speed are beneficial to increase the height, width and the area of the cladding layer. Input energy in the molten pool is the main factor affecting the morphology of the cladding layer. In addition, sensitivity analysis shows that the geometric characteristics of the cladding layer are the most sensitive to the laser power. These research results provide a sensitive characteristic diagram for the geometric characteristics of laser cladding Ni45 A, which provides a theoretical basis for further effective control of the forming quality of the cladding layer.