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用原位合成方法制备了TiC增强420不锈钢基复合材料,并研究了复合材料的显微组织、力学性能和抗磨损性能.实验结果表明,当复合材料中TiC颗粒体积分数低于6％时,材料中TiC颗粒分布均匀,颗粒的尺寸在5-10μm左右;但颗粒体积分数大于6％后,显微组织中出现TiC颗粒的轻微偏聚.随着TiC体积分数的增加,材料的抗拉强度和屈服强度先是增高,当TiC体积分数达到5％时,强度达最大值.此后增加TiC体积分数会导致强度的下降.复合材料的塑性随TiC体积分数的增加呈单调下降的趋势.TiC颗粒的引入使材料的抗磨损性能得到显著改善,但当TiC体积分数达到11％时,抗磨损性能接近一个稳定的水平.继续增加TiC含量,材料的抗磨损性能不再发生明显变化.
TiC reinforced 420 stainless steel matrix composites were prepared by the in-situ synthesis method and the microstructure, mechanical properties and wear resistance of the composites were studied.The experimental results show that when the volume fraction of TiC particles in the composites is less than 6% The TiC particles distribute uniformly in the material, and the size of the particles is about 5-10μm. However, when the volume fraction of the particles is more than 6%, the TiC particles appear slight segregation in the microstructure.With the increase of TiC volume fraction, the tensile strength And the yield strength first increases, and when the volume fraction of TiC reaches 5%, the strength reaches the maximum. After that, increasing the volume fraction of TiC will lead to the decrease of strength.The plasticity of the composites tends to decrease monotonously with the increase of TiC volume fraction The anti-wear property of the material is improved obviously when the content of TiC is up to 11%, and the anti-wear property of TiC is close to a stable level.With the increase of TiC content, the wear resistance of the material does not change obviously.