Bearing steel performance and requirements for rolling bearings
Rolling bearing materials include rolling bearing parts materials and cages, rivets and other auxiliary materials. Rolling bearings and their parts are mostly made of steel. The rolling bearing steels are usually high carbon chromium steels and carburized steels. With the development of modern science and technology and the increasing use of rolling bearings, the requirements for bearings have become higher and higher, such as high precision, long life, and high reliability.
For some special-purpose bearings, bearing materials are also required to have high temperature resistance, corrosion resistance, non-magnetic, ultra-low temperature, and radiation resistance. In addition, bearing materials include alloy materials, non-ferrous metals and non-metallic materials. In addition, bearings made of ceramic materials have been used in locomotives, automobiles, subways, aerospace, aerospace, and chemical industries.
The basic requirements for rolling bearing materials depend to a large extent on the performance of the bearing. The choice of materials for the manufacture of rolling bearings is appropriate and will have a great influence on their performance and life.
Under normal circumstances, the main failure modes of rolling bearings are fatigue spalling under alternating stress, and loss of bearing accuracy due to frictional wear. In addition, there are cracks, indentation, corrosion and other reasons caused by the abnormal damage to the bearing. Therefore, rolling bearings should have high resistance to plastic deformation, low friction and wear, good rotation accuracy, good dimensional accuracy and stability, and long contact fatigue life. And many of these properties are determined by both the material and the heat treatment process. Since the basic requirements of the rolling bearing on the material are determined by the destruction of the bearing, the material required to manufacture the rolling bearing should have the following properties after a certain heat treatment of the following process: