Selection of processing materials for hardened and tempered gears

The contact fatigue strength and wear resistance of the gear will be correspondingly improved as its hardness increases. The hardness of the gear after heating is also related to the carbon content of the steel.

For this reason, ingearWhen designing the product, calculate the strength or hardness that the product should have based on the contact stress and bending stress, so that the carbon content range of the steel can be roughly selected.

Finished selecting the hardenability that the material should have based on the strength and the effective cross-section of the gear, that is, the effective cross-section during heat treatment hardening.

依据材料的含碳量及淬透性就可以选择合理的材料。选用的钢材为42CrMo4，30CrNi3Mo8。

When the material and section are constant, the higher the hardness, the lower the toughness and plasticity of the gear.

However, for gear operating conditions, plasticity and toughness should not be reduced under high load conditions.

Therefore, we must strictly select the material according to the allowable hardness of the material.

The above is the relevant instructions for the selection of materials for quenching and tempering gear processing, including but not limited to, if there are any deficiencies, please add them, and if you have relevant requirements, you can consult EP for free.