How to prevent gear deformation after tempering

We all know that gear is easy to deform in heat treatment, and serious deformation is easy to affect our daily work. So how should we prevent gear from changing after heat treatment?

Prepare the organization for eventual processing. It should be noted that in the normalizing or tempering treatment, it is necessary to keep the temperature of the furnace uniform, and the use of station appliances, so that the workpiece is evenly heated and cooled, and it is prohibited to pile up together. For gears that need to be drilled to reduce weight, the drilling sequence should be arranged after heat treatment.

The final heat treatment of gear adopts high-frequency quenching of tooth surface with small deformation of parts. The tooth surface obtained after high-frequency quenching has high strength, hardness, wear resistance and fatigue limit, while the core still maintains sufficient plasticity and toughness. To reduce deformation. The high-frequency quenching of tooth surface should adopt lower quenching temperature, shorter heating time, uniform heating and slow cooling.