为提高BT9钛合金的耐磨性 ,利用碳对其进行激光表面合金化 ,制得了以TiC为增强相的快速凝固“原位”耐磨复合材料表面改性层。研究了碳激光表面合金化工艺参数对BT9钛合金激光表面改性层显微组织和硬度的影响。结果表明 ,碳激光表面合金化技术是一种提高钛合金耐磨性的很有前途的表面改性新技术 In order to improve the wear resistance of BT9 titanium alloy, laser surface alloying with carbon was carried out to obtain a rapidly solidified “in situ” wear resistant composite surface modification layer with TiC as reinforcing phase. The effect of carbon laser surface alloying process parameters on the microstructure and hardness of BT9 titanium laser surface modification layer was studied. The results show that the carbon laser surface alloying technology is a promising new surface modification technology to improve the wear resistance of titanium alloys