Effect of heat treatment on bearings

release time：2016/12/16 14:34:37

1.The quality of heat treatment directly affects the life of the bearing.If the heat treatment temperature is too high, that will result in coarse grains and quench cracks. on the contrary,If the quenching temperature is too low, the hardness of the bearing will be slightly reduced.

2.If the tempering temperature is too high, the hardness will decrease and the stress relief will be better.The tempering temperature is too low, the hardness of the material is high, but the stress is difficult to remove.Therefore, bearing steel generally adopts the tempering temperature of 150~180.

3.Effect of preheat treatment on bearing life, especially Spheroidizing treatment.If the Spheroidizing is not ideal or uneven, it is easy to cause uneven carbide concentration.

During quenching, the deformation of the ring will increase, and the deformation is irregular, which will easily lead to the scrap of bearings.

4.Impact of forging on bearing life.If the forging temperature is too high, the grains are thick and easy to crack after quenching.

It can be seen from the above that forging, annealing, quenching and tempering all play a decisive role in bearing life.If you want to produce high quality bearings, you should control these four basic heat treatment steps, rather than simply control the quenching process.