The importance of gear shafts.The mill is an important piece of machinery for modern industrial production, and the gear shaft of the mill is an important transmission part of the mill, mainly subject to alternating load, impact load, shear stress and contact stress.
The shaft section is prone to cracking and the teeth to wear. Therefore a certain strength and toughness is required for the heart of the gear shaft, with a high fatigue limit and resistance to multiple impacts. The surface should also have a certain degree of hardness and wear resistance. In order to meet these performance requirements, the material should have good mechanical properties, often using 42CrMo steel by normalising, tempering, induction heating quenching plus low-temperature tempering has reached the required performance.