Introduction to carburizing and quenching process of precision gear:

1. Gear material selection

Gears usually decide what materials and processes to meet this requirement according to the performance requirements of working parts. The reason why most gears use carburizing quenching heat treatment process is that when the transmission torque changes direction and changes the moving speed through the speed ratio, the driving gear moves the power to the driven gear.

2. Gear noise control

In the process of cyclic impact, friction and vibration, the two tooth surfaces intersect to form a straight line and slip, so that the contact part bears alternating contact compressive stress, the tooth root bears alternating bending stress, and the gear will also bear additional dynamic load. This service condition determines the performance of the gear. The tooth surface is required to have high wear resistance and high contact fatigue upper limit, and the tooth root is required to have high bending strength and sufficient impact toughness. Therefore, it is necessary to put forward reasonable requirements for the selection of materials and meet the corresponding requirements through appropriate heat treatment technology. At the same time, Gears must have high transmission accuracy and produce very low noise.

3. Gear machining accuracy requirements

It also puts forward a very high requirement for machining accuracy and heat treatment deformation process control. Only the low-speed light load gear system in less important working places can adopt the technical route of quenching and tempering or normalizing plus surface quenching by selecting medium carbon steel or medium carbon alloy steel, or use plastic gears in the field with less force impact. For high-speed heavy-duty gears, we need to select carburized steel to meet the use requirements of enterprises, and use quenching and tempering or normalizing for preliminary heat treatment, After the gear is processed, the carburizing quenching and tempering treatment process is adopted as a heat treatment to ensure that the requirements of improving performance are met. If necessary, the tooth shape must be finished after heat treatment, so as to make the tooth surface have high hardness, wear resistance and high contact fatigue strength, and the tooth root core has enough toughness to resist impact.

The above is an introduction to the carburizing and quenching process of precision gears. Those who need precision gears are welcome to consult IHF Hefa gear manufacturers.