The Simulation of Influence of Quenching Temperature on Properties of Bearing Rings

Abstract

Roller bearings are a very important part of modern machineries and equipments. They have a significant impact on the smooth running, reliable performance and durability. Replacing worn or damaged roller bearings often require extensive disassembly of the machine and the costs often exceed the price of the replaced bearings. There is an influence of the correct bearing construction and dimensional accuracy on the durability, but the grade and quality of used steel and its heat treatment are very important, too. Tempering is an important chapter. Tempering has the effect to modifying the properties of martensite after quenching and transformation of residual austenite, which is related to the change of bearing rings dimensions, growth, roundness and hardness. Decrease in hardness of bearing steel is associated with a reduction in the basic dynamic load rating of rolling bearings and thus durability. In this article there is analysed the influence of quenching and tempering on their mechanical properties after heat treatment. There was also used simulation software to verify the possibility of modeling of bearing rings quenching.