Abstract: Laser cladding was carried out to prepare Ni₃Al/Cr₇C₃ alloy coatings on 42CrMo steel. The effects of different Cr₇C₃ contents on the microstructure and wear resistance of the cladding materials were investigated using scanning electron microscopy, X-ray diffraction and wear tribometer. The results indicate that the microstructure of the Ni₃Al based cladding materials contains mainly Ni₃Al and in situ-formed Cr₇C₃. The microhardness of the laser cladding materials prepared by Ni₃Al/Cr₇C₃ alloy powder is above 550HV, and the maximum reaches 834HV. With the increase of Cr₇C₃ content, the wear resistance of Ni₃Al based cladding materials first increases and then decreases. When the Cr₇C₃ content is 25%, the wear rate of Ni₃Al based cladding materials is 0.74×10^-5 mm³/(N·m), only 14.7% of the wear rate of Ni₃Al laser cladding coating without Cr₇C₃, and the wear rate of Ni₃Al-based alloy cladding materials is only 1.669×10^-5 mm³/(N·m).