分别采用氮气及预涂 Ti N粉、碳粉、Ti C粉等方法对 Ti- 48Al- 2 Cr- 2 Nb金属间化合物进行激光表面合金化 ,制得了分别以 Ti N,Ti C等硬质耐磨相为增强相的快速凝固“原位”金属基耐磨复合材料表面改性层 ,并分别在干滑动及磨料磨损条件下测试了所获激光表面合金化改性层的耐磨性。结果表明 ,对 Ti- 48Al- 2 Cr- 2 Nb合金进行激光表面合金化改性处理后显微硬度和耐磨性大幅度提高 The Ti-48Al-2 Cr-2 Nb intermetallics were laser surface alloying with nitrogen and pre-coated TiN powder, carbon powder and TiC powder, respectively. The wear-resisting rapid solidified “in-situ” metal-based wear-resisting composite surface modification layer with reinforcing phase was tested. The wear resistance of the obtained laser surface alloying modified layer was tested under dry sliding and abrasive wear conditions respectively. The results show that the microhardness and wear resistance of Ti-48Al-2 Cr-2 Nb alloy after laser surface alloying modification are greatly improved