The invention discloses a gear production process facilitating the improvement of production efficiency and product quality. The gear production process includes the steps of blank
casting,
cutting, heat treatment, finishing
cutting and ground finish, wherein blank
casting,
cutting, heat treatment, finishing cutting and ground finish are sequentially conducted. Raw materials for blank
casting are 20CrMnTiH, a
continuous casting machine is adopted in the blank casting process, the pulling rate of the
continuous casting machine ranges from 0.6 m / min to 0.72 m / min,
electromagnetic stirring of a crystallizer is adopted in the blank casting process,
electromagnetic stirring currents are 400 A, and
electromagnetic stirring frequency is 2.5 Hz. The heat treatment step includes the procedures that a
cut blank is heated and carburized, heating in stages, namely, preheating at the first stage, carburization at the second stage,
diffusion for 1 h to 1.2 h at the third stage and
slow cooling at the fourth stage is adopted, the blank is slowly cooled to the temperature
ranging from 500 DEG C to 600 DEG C and then quenched, the quenched blank is heated to the temperature
ranging from 170 DEG C to 200 DEG C and then tempered after heat is preserved for not less than 3 h. The gear production process is simple in steps and short in
process time, and product ingredients are even.