激光辅助冷喷涂制备SiC-316复合涂层的组织与性能

doi:10.13251/j.issn.0254-6051.2025.04.046

摘要/Abstract

摘要： 采用激光辅助冷喷涂(LACS)技术在Q235钢基体上制备了316L及SiC-316L复合涂层,根据不同激光功率下316L涂层的质量确定制备SiC-316L复合涂层的激光功率,进而对比研究了两种涂层的显微组织、物相组成、硬度和耐磨性。结果表明,激光功率的提升能明显降低316L涂层孔隙率并提升涂层与基体的结合强度。激光功率为500 W时,316L涂层孔隙和微裂纹最少,SiC-316L复合涂层中SiC颗粒在复合涂层中分布均匀,两种涂层均未发生明显氧化、相变现象,涂层与基体的结合机制均为机械结合与冶金结合共存机制。316L涂层和SiC-316L复合涂层的平均硬度分别达到437.7和490.5 HV0.3。常温磨损条件下,SiC-316L复合涂层的摩擦因数较316L涂层降低了35%;600 ℃高温磨损条件下,SiC-316L复合涂层的摩擦因数较316L涂层降低了18.4%,SiC-316L复合涂层表现出更加优异的耐磨性能。

关键词: 激光辅助冷喷涂, 复合涂层, 激光功率, 物相成分, 硬度, 耐磨性

Abstract: 316L coating and SiC-316L composite coating on Q235 steel substrate were prepared using the laser-assisted cold spraying (LACS) technology, respectively, and the laser power for preparation of SiC-316L composite coating was determined according to the quality of 316L coatings under different laser powers, and then the microstructure, phase composition, hardness and wear resistance of the two coatings were studied and compared. The results show that the increase of laser power can significantly reduce the porosity of 316L coating and improve the bonding strength between the coating and the substrate. When the laser power is 500 W, the pores and microcracks of 316L coating are the least, the SiC particles are uniformly distributed in the SiC-316L composite coating, and no obvious oxidation and phase transformation occur in the two coatings which bonding mechanism between the coating and the substrate is the coexistence mechanism of mechanical bonding and metallurgical bonding. The average hardness of the 316L coating and SiC-316L composite coating reaches 437.7 HV0.3 and 490.3 HV0.3, respectively. The friction coefficient of the SiC-316L composite coating is 35% lower than that of the 316L coating under room temperature wear condition, and the friction coefficient of the SiC-316L composite coating is 18.4% lower than that of the 316L coating under 600 ℃ high temperature wear condition, showing that the SiC-316L composite coating exhibits more excellent wear resistance.

Key words: laser-assisted cold spraying, composite coating, laser power, phase composition, hardness, wear resistance

中图分类号:

TG178

于宝义, 马洪迪, 郑黎. 激光辅助冷喷涂制备SiC-316复合涂层的组织与性能[J]. 金属热处理, 2025, 50(4): 295-301.

Yu Baoyi, Ma Hongdi, Zheng Li. Microstructure and properties of SiC-316 composite coatings prepared by laser-assisted cold spraying[J]. Heat Treatment of Metals, 2025, 50(4): 295-301.

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