In ball bearings, under the mutual contact between the steel ball and the inner and outer ring raceways of the bearing, if the contact stress is relatively high, the steel ball will produce contact fatigue. In the steel ball in the ball bearing, the main failure form is peeling and fracture of contact fatigue. In addition, because the steel ball produces contact fatigue, this fatigue will affect the accuracy of the surface processing of the steel ball and the surface finish, so it will directly affect the bearing noise or life. In order to improve the contact fatigue life of steel balls, Steel Balls Wholesaler reminds that the contact fatigue life of steel balls can be prolonged by methods such as material selection, steel ball surface treatment and surface strengthening technology.
First of all, in the selection of materials for steel balls, it is necessary to pay attention to the quality of the materials selected for manufacturing steel balls. Because of the quality of the steel used for bearings, it is the steel with the most stringent requirements and the most inspection items among alloy steels. Moreover, it is a bearing used in automobiles and other products. More than a variety of tests are required for the detection of steel balls to determine that the steel balls are very suitable for use in ball bearings. In order to improve the life of steel ball contact fatigue, bearing steel with high purity can be selected. Steel with high purity, that is, steel with less non-metallic inclusion elements in bearing steel, and the distribution of non-main elements must be reasonably arranged. For example, in the material, the size and distribution of the carbon element particles, the smaller the carbon element particles, the more uniform the distribution, the more the fatigue resistance of the bearing steel can be improved, so that the purity of the material is improved and the contact of the steel balls Lifespan has also been greatly improved.
Secondly, the surface treatment method of the steel ball can be adopted to extend the contact life of the steel ball. After research and data analysis and statistics, most of the cracks generated by steel balls due to contact fatigue are on the surface of the material. Therefore, surface treatment of the steel ball also helps to improve the contact fatigue resistance of the steel ball. There are many methods and types of steel ball surface treatment, such as electroplating, electroless plating, ion implantation technology, physical and chemical vapor deposition, carburizing or nitriding, surface quenching, cold rolling and cold pressing. The above methods all improve the contact fatigue resistance of the steel ball by changing the surface material and enhancing the metal fatigue resistance.
Finally, steel ball surface strengthening technology can also be used to extend the contact fatigue life of steel balls. A steel ball of a certain size and diameter strikes the steel ball continuously through vibration, and the small steel ball is mixed in it, and it is continuously collided, thereby releasing internal stress and strengthening the steel ball. When the surface of the steel ball is strengthened, it can also improve its wear resistance and enhance its contact life.