Hardened-tooth-surface gear and hardened-tooth-surface gear repair technology

Abstract

The invention relates to a hardened-tooth-surface gear, which comprises a gear main body. A fusion covering layer is arranged on the surface of the gear main body. The fusion covering layer comprises a bonding layer, a transition layer, a working layer and a processing layer, wherein the bonding layer is arranged on the external surface of the gear main body; the transition layer is arranged on the top surface of the bonding layer; the working layer is arranged on the top surface of the transition layer; and the processing layer is arranged on the top surface of the working layer. The invention additionally discloses a hardened-tooth-surface gear repair technology, which comprises a pretreatment step for pretreating the hardened-tooth-surface gear to enable the hardened-tooth-surface gear to satisfy repair requirements; a repair step for forming the fusion covering layer on the surface of the hardened-tooth-surface gear; and a processing step for processing the repaired hardened-tooth-surface gear to enable the hardened-tooth-surface gear to satisfy a repair standard. The hardened-tooth-surface gear repair technology provided by the invention can be used for repairing surface wear, cracks and cutting root broken teeth of the hardened-tooth-surface gear to guarantee full engagement of gear teeth, the noise produced during gear teeth engagement is reduced, the gear teeth are prevented from being broken, the rejection rate of the hardened-tooth-surface gear is reduced, the production cost is reduced, the resource waste is reduced, and the economic and social benefits of enterprises are improved.

Description

technical field [0001] The invention relates to a hardened gear, in particular to a hardened gear and a repairing process for the hardened gear. Background technique [0002] Hard-toothed gears usually refer to gears whose tooth surface hardness of a pair of meshing gears is greater than 350HBS. The load-bearing capacity of the tooth surface should be related to the hardness of the tooth surface. The higher the hardness, the higher the load-bearing capacity. According to the hardness of the tooth surface, people usually divide the gear transmission into two categories, namely hard tooth surface gear and soft tooth surface gear. [0003] "FGM-KM-B.U" is the dispersion strengthened composite metal gradient functional material, which is a special alloy series. This alloy material series is fusible, easy to fuse with the base material, and has comprehensive physical properties such as wear resistance, impact resistance, heat evacuation stress resistance, and corrosion resistan...

AI Technical Summary

Problems solved by technology

[0004] The hard-toothed gear is an elastic body, and it is also a kind of wearing part. It has poor corrosion resistance, heat resistance, fatigue resistance, and wear resistance. When the huge torsional moment is applied, a small amount of bending deformation will occur in an instant, and the slight deformation during meshing will directly cause the influence of the base joint error, causing the next pair of tooth tops and tooth roots to interfere and produce a strong impact, which will cause meshing