采用激光熔覆技术,在16Mn钢表面制备了2205双相不锈钢/TiC复合涂层,研究了TiC含量对熔覆层微观组织、显微硬度及摩擦磨损性能的影响,并讨论了熔覆层中TiC的熔解、析出行为与熔覆层性能之间的关系。结果表明,随着TiC含量的增大,熔覆层的稀释率逐渐增大。熔覆过程中TiC发生了熔解及析出现象。随着TiC含量的增大,熔覆层的显微硬度逐渐增大。当TiC质量分数达到15%时,熔覆层的显微硬度最大值可达612 HV,该熔覆层的磨损失重最小。

The laser cladding technique is adopted for the fabrication of 2205 dual-phase stainless steel/TiC composite coating on the 16Mn steel surface. The effect of TiC content on the microstructure, microhardness and frictional wear properties of cladding layer is investigated and the relationship between the melting and precipitation behaviors of TiC in the cladding layer and the properties of cladding layer is also discussed. The results show that the dilution rate of cladding layer increases gradually with the increase of TiC content. Moreover, the TiC particles melt and precipitate during the laser cladding process. The microhardness of cladding layer increases gradually as the TiC content increases, and the highest microhardness of cladding layer is up to 612 HV when the TiC mass fraction is 15%. Simultaneously, the wear weight loss of cladding layer is the lowest.