Carburizing process design of motorcycle sprocket

Due to the high content of alloying elements in 17Cr2Ni2Mo steel, the two-stage carburizing process is adopted to shorten the strong carburizing period. In order to enhance the diffusion ability of carbon, the diffusion temperature is 20c higher than the carburizing temperature, and the diffusion time is 2 times longer than the carburizing time. The alloy carbides of 17Cr2Ni2Mo steel are formed due to Cr, Ni and carbon. After carburizing, the alloy carbides are dispersed on the matrix, and incomplete quenching and low temperature tempering are adopted.