为增强钛合金耐磨性,利用多道搭接激光熔覆工艺在TC11表面制备CBN涂层。基于ANSYS软件平台,对熔覆温度场进行分析。对涂层的平整度与耐磨性进行研究。结果表明:温度场的形状类似于单道熔覆时的形状,呈扁圆形。此时温度场的分布不以光斑中心对称,温度场偏向一侧。由于有预热作用,熔覆升温要比降温快,且熔覆后一道次熔覆层上的最高温度要高于前一道次。随激光功率、送粉率和搭接率的增大,表面变得不平整。随扫描速度的增大,涂层面积变小,但表面平整度较好。熔覆层试样的磨损失重远远小于基体。随载荷的增加,熔覆层磨损量变化不大,而基体磨损量增加。 In order to enhance the wear resistance of titanium alloy, a CBN coating was prepared on the surface of TC11 by using a lap lapping laser cladding process. Based on ANSYS software platform, the temperature field of cladding was analyzed. The flatness and wear resistance of the coating were studied. The results show that the shape of the temperature field is similar to that of the single pass cladding and is oblate. At this point the temperature distribution of the spot is not symmetrical center, the temperature field biased to one side. Due to the preheating effect, the cladding temperature is faster than the cooling temperature, and the highest temperature on the cladding layer after cladding is higher than the previous one. With the laser power, powder feeding rate and lap rate increases, the surface becomes uneven. As the scanning speed increases, the coating area becomes smaller, but the surface roughness is better. The wear loss of the cladding coating is much smaller than that of the matrix. With the increase of load, the amount of cladding wear changes little, while the amount of matrix wear increases.