With the continuous development of China’s automobile industry and national economy year-on-year, the heavy vehicle industry has also entered a stage of rapid improvement, and the quality of the corresponding supporting gearbox has higher requirements. It not only requires large overload capacity and advanced and reliable operating performance and stability, but also has begun to move towards the trend of sedanization, that is, to achieve safety and comfort, All this needs to be guaranteed by sophisticated manufacturing technology. Controlling the deformation of bus gearbox gear is an important link to realize the comfort performance of heavy-duty vehicles.
The gear box of heavy-duty truck is usually carburized and quenched with alloy carburized carbon steel materials. When entering the heat treatment, the truck gear has basically gone through the last process or the machining allowance after heat treatment is very small, which requires the truck gear to be less deformed or even not deformed during the heat treatment, such as the gear sleeve parts in the automobile synchronizer
During the processing, the tooth size has been controlled within the size range of the finished product, and the heat treatment deformation is required to be minimal. Therefore, the high requirements of truck gears pose a greater challenge to heat treatment.