采用自蔓延高温合成技术(SHS)结合真空消失模铸造工艺,在低合金钢表面上原位合成了TiC颗粒增强硬质涂层。通过光学显微镜、扫描电镜及能谱分析、X射线衍射以及显微硬度测试,研究了不同添加量氧化铈对TiCp/钢基硬质涂层组织及性能的影响。结果表明:通过添加适当的CeO2可以改善涂层质量,减少残渣、气孔等缺陷,提高涂层与基体的结合强度,原位合成的TiC呈圆形或椭圆形细小颗粒弥散分布在基体相中,显著提高了涂层的显微硬度。 TiC particle reinforced hard coating was synthesized on the surface of low alloyed steel by self-propagating high temperature synthesis (SHS) combined with vacuum EPC technique. The effects of different amounts of cerium oxide on the microstructure and properties of TiCp / steel based hard coatings were studied by optical microscope, SEM and EDS, X-ray diffraction and microhardness test. The results show that the addition of appropriate CeO2 can improve the coating quality, reduce the defects such as residue and porosity, and improve the bonding strength between the coating and the substrate. The in-situ synthesized TiC particles are round or oval, dispersed in the matrix phase, Significantly increased the microhardness of the coating.