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采用超音速等离子喷涂在0Cr13Ni5Mo不锈钢表面制备了纳米和微米WC-17Co涂层,并对比了2种涂层的孔隙率、结合强度、硬度和耐磨性。结果表明,纳米涂层的致密性和结合强度均高于微米涂层,其孔隙率仅为0.56%,结合强度大于69.2 MPa;纳米涂层和微米涂层的硬度是基体的3.9和3.8倍,硬度值从涂层的表面到底部逐渐增加;基体磨损为磨粒磨损+粘着磨损+层状剥落,2种涂层磨损均为磨粒磨损。纳米涂层的孔隙率低、硬度高、表面抗压性强使其表现出更优的耐磨性。
The nano-and micro-WC-17Co coatings were prepared on the surface of 0Cr13Ni5Mo stainless steel by supersonic plasma spraying, and the porosity, bonding strength, hardness and wear resistance of the two coatings were compared. The results showed that the compactness and bonding strength of nano-coating were higher than that of micro-coating, the porosity was only 0.56% and the bonding strength was greater than 69.2 MPa. The hardness of nano-coating and micro-coating was 3.9 and 3.8 times that of the matrix, The hardness increases gradually from the surface to the bottom of the coating. The wear of the substrate is abrasive wear + adhesive wear + layered exfoliation, and the abrasive wear of the two kinds of coatings is abrasive wear. The nano-coating has low porosity, high hardness and strong surface compressive strength so that it shows better wear resistance.