采用短暂高温浇注-共晶温度热处理反应技术,在灰铸铁表面原位生成了一层梯度分布的Ti C硬质增强相,制备出了Ti C/Fe表面致密陶瓷复合材料。借助XRD、SEM、EDS、显微硬度测试仪以及磨料磨损试验机对制备好的Ti C致密陶瓷复合材料的物相组成进行了分析,对其宏观、微观组织进行了观察,并在常温下对该表面复合材料进行了不同载荷下的磨损试验。结果表明,随载荷不断增大,表面致密陶瓷复合材料的磨损机理发生了变化,从最开始的划痕、微犁沟到颗粒剥落和颗粒破碎等,其相对耐磨性在40左右。 TiC / Fe surface-dense ceramic composites were prepared by using transient high temperature casting-eutectic temperature-heat treatment reaction technology to form a layer of gradient TiC hard reinforcement in situ on the surface of gray cast iron. The phase composition of the prepared TiC dense ceramic composites was analyzed by means of XRD, SEM, EDS, microhardness tester and abrasive wear tester. The macrostructure and microstructure of the composites were observed. The surface composites were tested for wear under different loads. The results show that with the increase of load, the wear mechanism of surface compacted ceramic composites changes. From the initial scratches, micro-furrows to particle spalling and particle breakage, the relative wear resistance is about 40%.