| 摘要 |
PURPOSE:To considerably improve the fatigue strength of a gear by aging the gear subjected to shot peening after carburization, hardening and tempering so as to convert the surface layer of the gear into a high density hardened layer. CONSTITUTION:A toothed gear is carburized, hardened and tempered. After the surface of the gear is subjected to shot peening, the gear is aged at 100-200 deg.C for 1-2hr. By this method, carbon penetrates into the interstices among the atoms in the surface layer work-hardened by the shot peening, so a high density hardened layer is formed and the fatigue strength of the gear can be considerably improved.
|
