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为了优化自生TiC颗粒增强钢基表面复合材料的工艺参数,利用真空实型铸渗方法制备了自生TiC颗粒增强钢基表面复合材料,重点研究了自生TiC颗粒增强钢基表面复合材料的组织均匀性。结果表明,从基材和复合层间的界面到复合层表面,TiC颗粒尺寸逐渐增大,圆整度逐渐变差,其中Ti-C-20wt%Fe体系复合层中TiC颗粒的尺寸增长量(由1μm增长到2～3μm)明显小于Ti-C体系(由1～2μm增长到约10μm)。与Ti-C体系相比,Ti-C-20wt%Fe体系制备得到的复合层中元素分布、硬度和TiC颗粒的体积分数较均匀,在复合层相同位置上TiC颗粒较小,圆整度较好。
In order to optimize the process parameters of self-generating TiC particles reinforced steel-based surface composites, self-generating TiC particles reinforced steel-based surface composites were prepared by vacuum solid infiltration method. The microstructures of self-forming TiC particles reinforced steel-based surface composites were studied emphatically . The results show that the size of TiC particles gradually increases from the interface between the substrate and the composite layer to the surface of the composite layer, and the roundness gradually deteriorates. The size growth of TiC particles in the Ti-C-20wt% Fe composite layer From 1μm to 2 ~ 3μm) was significantly smaller than the Ti-C system (from 1 ~ 2μm to about 10μm). Compared with Ti-C system, Ti-C-20wt% Fe system prepared composite layer element distribution, hardness and volume fraction of TiC particles more uniform, the same position in the composite layer TiC particles smaller, roundness than it is good.