Research on Crack Regulation of Laser-cladding Ni60 Alloy Coatings
In order to reduce the generation of cracks in the laser cladding layer,a Ni60 cladding layer was prepared on the surface of 42CrMo steel using laser cladding technology.The mechanism of crack formation was explored by analyzing the microstructure,phase,and energy spectrum of the cladding layer,and the effects of different laser power and preheating temperature on the crack were also investigated.The study shows that the cladding layer mainly consists of γ-(Fe,Ni),Fe₀.₆₄Ni₀.₃₆and M23C6.The thermophysical properties,the temperature gradient and the distribution of hard phase in the cladding layer between the matrix and the cladding layer all affect the number and length of cracks.With the increase of laser power and preheating temperature,the number and length of cracks in the cladding layer have improved to some extent.The research results can provide a reference basis for crack control in laser cladding Ni based alloys.
国家科技期刊平台
NSTL
万方数据
维普
