2Cr13钢表面激光熔覆Fe基合金涂层工艺参数优化与摩擦磨损性能研究

    Optimization of Process Parameters and Friction-Wear Performance Study of Fe-Based Alloy Coating Laser Cladding on 2Cr13 Steel Surface

    • 摘要: 为了应对叶片表面的磨损问题,利用激光熔覆技术在2Cr13钢基板表面熔覆Fe基合金涂层。基于正交试验数据,利用极差分析研究了工艺参数对涂层成形尺寸的影响规律。分析了最佳工艺参数下涂层的界面组织特征及耐磨性能的分析。结果表明:Fe基合金涂层熔覆实验的最佳工艺参数为激光功率1800 W,扫描速度4 mm/s,送粉速率22g/min;涂层成形质量较好,与基体形成了良好的冶金结合。涂层中物相主要为α-Fe、Fe-Cr固溶体与Fe-Ni固溶体,涂层的平均显微硬度为572.61 HV0.2,相比基体平均显微硬度提升了2.09倍,表面摩擦系数为0.7096,相比基体摩擦系数降低了29.88%。

       

      Abstract: To tackle the wear issue on the blade surface, Fe-based alloy coating was applied to the surface of 2 Cr13 steel substrate utilizing laser cladding technology. Based on orthogonal experimental data, the effects of various process parameters on the dimensions of the coating formation using range analysis were investigated, and the interface structure and wear resistance of the coating under optimal process parameters were examined. The findings indicate that the optimal process parameters for the Fe-based alloy coating cladding experiment include a laser power of 1800 W, a scanning speed of 4 mm/s,and a powder feeding rate of 22 g/min. Under these conditions, the coating exhibits excellent formation quality and establishes a robust metallurgical bond with the substrate. The primary phases identified within the coating are α-Fe, Fe-Cr solid solution and Fe-Ni solid solution. Moreover, the average microhardness of the coating is measured at 572.61 HV0.2, which is 2.09 times greater than that of the substrate. The friction coefficient of the coating is recorded at 0.7096, reflecting a significant reduction of 29.88% compared with the wear coefficient of the substrate.

       

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