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采用真空实型铸渗(V-EPC)工艺制备碳化钨颗粒增强铁基表层复合材料,观察并研究其基体组织和抗三体磨料磨损性能。结果表明,基体组织的变化对复合材料的磨损性能产生显著的影响,随着Cr含量的增大,复合材料基体组织中的碳化物含量增加,形貌由长条状向块状转变。而复合材料的三体磨料磨损性能随着Cr含量的增大呈增加趋势,与未添加Cr的表层复合材料相比,当基体中Cr含量为27.4%时,表层复合材料的三体磨料磨损性能提高了40.6%。Cr的添加可提高WC p/铁基表层复合材料三体磨料磨损性能的机制为双“阴影效应”和“支撑效应”的协同作用。
Tungsten carbide particles reinforced iron-based surface composites were prepared by vacuum solid infiltration (V-EPC) process. The wear behavior of matrix and anti-tristimulus was observed and studied. The results show that the matrix microstructure changes have a significant impact on the wear properties of the composites. With the increase of Cr content, the carbide content in the matrix increases, and the morphology changes from long strip to block. The tribological properties of the three-component abrasive composites increase with the increase of Cr content. Compared with the non-Cr surface composites, when the content of Cr in the matrix is 27.4%, the three-component abrasive wear properties of the surface composites Increased by 40.6%. The mechanism by which the addition of Cr can improve the tribological properties of WC p / Fe-based three-layered abrasive composites is the synergistic effect of double “shadow effect” and “supporting effect”.