Method for improving hardness of inner gear

Abstract

A method for improving hardness of an inner gear comprises the following steps that firstly, the integral inner gear is subjected to solid solution treatment, the solid solution treatment temperature is 400-450 DEG C, and the heat preservation time is 4 h; secondly, after solid solution treatment is finished, quenching treatment is conducted on the outer circle face, the upper end face and the lower end face of the inner gear, and the quenching temperature is 50-60 DEG C; thirdly, after the second step is finished, the gear face of the inner gear is subjected to quenching treatment, and the quenching temperature is 70-70 DEG C; fourthly, after the third step is finished, the inner gear is subjected to aging treatment, the aging temperature is 250-280 DEG C, and the heat preservation time is 3 h; fifthly, natural cooling is conducted for 2 h; and sixthly, an induction heater is utilized for conducting heating treatment on the outer circle face, the upper end face and the lower end face of the inner gear, the heating temperature is 200-220 DEG C, and the heating time is 1 h; and sixthly, natural cooling is conducted to the room temperature. By means of the method, the hardness of the inner gear can be effectively improved, the inner gear can better resist impacts, and the service life of the inner gear can be better prolonged.

Description

technical field [0001] The invention relates to an internal gear processing technology, in particular to a method for increasing the hardness of the internal gear. Background technique [0002] Some internal gears are used in large-scale machinery, and their working environment is usually relatively harsh. Internal gears are often prone to failure during use, especially the internal gears in the wheel reducer, which are prone to teething and upper mouth cracking. Therefore, it is required that the base body and the tooth surface of the internal gear have high hardness and impact resistance, so as to ensure that the internal gear has a long service life in harsh environments. Contents of the invention [0003] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a method and a processing method for increasing the hardness of the internal gear, which can effectively improve the hardness of the internal gear, make the internal gear ...

AI Technical Summary

Problems solved by technology

[0002] Some internal gears are used in large-scale machinery, and their working environment is usually relatively harsh. Internal gears are often prone to failure during use, especially the internal gears in the wheel reducer, which are prone to teething and upper mouth cracking. Therefore, the base body and tooth surface of the internal gear are required to have high hardness and impact resistance, so as to ensure that it can have a long service life in harsh environments