摘要
以化学共沉积Ni-WS_(2)/MoS_(2)包覆WC-12Ni粉体为原料,在17-4PH不锈钢基体上制备了超音速火焰喷涂(HVOF)涂层。采用场发射扫描电子显微镜对涂层组织结构进行表征,分别通过测定涂层的显微硬度、摩擦系数和磨损率,并结合粉体特征及涂层的孔隙结构分析来评价涂层摩擦学性能。实验结果表明,通过化学共沉积包覆喷涂粉体引入固体润滑剂,不仅能保证喷涂粉体的流动性,还能实现较均匀固体润滑剂掺杂,显著降低涂层孔隙率、提高致密化程度,获得低摩擦系数、低磨损率以及提高的涂层硬度和耐磨性。其中,由于WS_(2)与WC硬质合金有更好的成分相容性,WC-Ni-WS_(2)涂层的减摩耐磨性能要优于WC-Ni-MoS_(2)涂层。
Ni-WS_(2)/MoS_(2)-coated WC-12Ni powders obtained with electroless co-deposition were used to prepare high velocity oxyfuel spraying(HVOF)coatings on the 17-4PH stainless steel substrate.The microstructure of the coatings was characterized with field emission scanning electron microscopy,and the tribological properties of the coatings were evaluated by measuring the microhardness,friction coefficient and wear rate of the coatings,combined with analysis of the powder characteristics and the pore structures of the coatings.The results showed that,with the introduction of solid lubricants through electroless co-deposition on spray powders,the fluidity of the coating powder not only could be guaranteed,but also the solid lubricant could be doped more uniformly,thus significantly reducing the porosity of the coatings and improving the degree of densification.A low coefficient of friction and wear rate,as well as improved coating hardness and wear resistance were obtained.Due to the better composition compatibility of WS_(2)and WC cemented carbide,the anti-friction and anti-wear properties of the WC-Ni-WS_(2)coating were better than that of the WC-Ni-MoS_(2)coating.
作者
刘妍君
姜淑文
闫佳伟
LIU Yanjun;JIANG Shuwen;YAN Jiawei(School of Textile and Material Engineering,Dalian Polytechnic University,Dalian 116034,China)
出处
《大连工业大学学报》
CAS
2024年第4期274-280,共7页
Journal of Dalian Polytechnic University
基金
国家自然科学基金项目(51601027)
辽宁省自然科学基金项目(2019-ZD-0286)。
