Multi-objective optimization of process parameters for rectangular laser cladding of Fe-based alloy wear-resistant coatings

文献类型： 外文期刊

第一作者： Zhang, Yanjing

作者： Zhang, Yanjing;Zhan, Hua;Wang, Ruijun;Wan, Qiang;Zhang, Xingmei;Wang, Wei

作者机构：

关键词： Rectangular spot; Laser cladding; Fe-based alloy; RSM; Wear-resistant coating

期刊名称：SURFACE & COATINGS TECHNOLOGY （ 影响因子：6.1； 五年影响因子：5.5 ）

ISSN： 0257-8972

年卷期： 2025 年 503 卷

页码：

收录情况： SCI

摘要： To enhance the wear resistance of straw cutting tools used in agricultural machinery. Response surface methodology (RSM) was employed to establish the relationship between the preparation process parameters of rectangular spot laser cladding Fe-based alloy coatings and the performance of the coatings. The effects of process parameters, including laser power, feeding rate, and scanning speed, on coating thickness, dilution rate, and microhardness were analyzed. The results indicated that in the established response surface prediction model, the interaction between laser power and scanning speed significantly affected coating thickness, while the interaction between laser power and feeding rate had the greatest impact on dilution rate and microhardness. The optimal process parameters obtained were laser power of 2.61 kW, feeding rate of 2.28 r/min, and scanning speed of 1.5 mm/s. After experimental validation, the error was controlled within 5 %. Further analysis revealed that the coatings, prepared with optimal process parameters, had a microstructure that was equiaxed crystalline, dense, and uniform. The average microhardness of the coatings was 823.61 HV0.025, approximately 3.9 times greater than that of the substrate, and the abrasion rate was measured at 2.22 x 10- 8 mm3/(N & sdot;m). The abrasion mechanism was mainly characterized by slight abrasive grain wear, adhesive wear and oxidative wear, indicating that the wear-resistant properties of the coatings were significantly improved. Multi-objective process parameter optimization based on response surface methodology elucidated the mapping relationship between rectangular spot laser cladding process parameters and coating properties, providing technical references for the enhancement of wear-resistant properties of agricultural machinery components.

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