Abstract
The 3D printing powder Ti-48Al-2Cr-2Nb was selected, a mixed powder of 1%hBN and 1%TiC was added, and 21-4N steel was used as the substrate, and the above coating was prepared by laser cladding technology. Scanning electron microscope (SEM) and micro hardness tester were used to study the effect of laser power and scanning speed on the microstructure and properties of the cladding layer. The results show that the coating on the substrate is not formed when the laser power is 1000W, and the coating is burnt yellow when the power is 1300W; when the power is 1200W, the coating on the substrate is well formed and the coating quality is not defective when the scanning speed is 400mm/min.
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