With the increasing demand for coal mine output, the TBM model has higher and higher requirements for gear quality and performance. The gear is deformed and cracked in the process of heat treatment and the gear box pushing gear occurs from time to time in coal mining excavation. Here,...
The low surface hardness of carburized gear will reduce the wear resistance and fatigue resistance of gear, and have an adverse impact on the friction and wear resistance of gear surface. 1. Cause analysis (1) Surface decarburization and decarburization layer in metallographic examination are caused by poor protection during...
For a long time, the forging blanks of car gears are mostly normalized. In recent years, with the diversification of gear materials and the high standard requirements for gear quality, normalizing process is often difficult to meet the actual needs of production, especially the advent of high-power engine promotes...
Features: produced during quenching, most of them are hairy and sometimes self expanding. Some of the cracks are along the radius of the root fillet, some are at the two end faces of the tooth, some pass through the top of the tooth or exist at the junction of...