What Are The Performance Requirements Of Raw Materials For The Production Of Angular Contact Ball Bearings

Angular contact ball bearing is a kind of bearings commonly used in modern machinery and equipment. It can bear radial coincidence and axial load at the same time, and can work at a higher speed. The higher the accuracy grade of angular contact ball bearing, the better the operation effect is. Therefore, the production materials of precision angular contact ball bearings need to have good physical and chemical properties. At present, the main production material of angular contact ball bearing is bearing steel. So, what are the performance requirements of the raw materials for manufacturing angular contact ball bearings?
First, wear resistance
When the angular contact ball bearing is working, not only rolling friction occurs between the ring, the rolling body and the maintenance frame, but also sliding friction, so that the bearing parts continue to wear. In order to increase the wear of bearing zero push parts, maintain bearing precision stability and prolong the service life, bearing steel should have good wear resistance. Wear resistance refers to the resistance of the material to mechanical wear, representing the wear per unit area in unit time under the condition of a certain load grinding speed. Wear resistance is related to many properties of materials, such as material hardness, strength, surface roughness and so on.
2. Contact fatigue strength
Under the action of periodic load, the contact surface of precision angular contact ball bearings is easily exhausted and damaged, that is, the emergence of cracking and spalling, which is an important reason for the destruction of bearings. Therefore, in order to further improve the service life of bearings, the bearing steel produced by angular contact ball bearings must have very high contact fatigue strength, so that the contact strength of angular contact ball bearings can be higher and the damage resistance is better.
Contact strength refers to the ability to resist failure (deformation and fracture) under contact stress, including contact static strength and contact fatigue strength.
Under the repeated action of high contact stress, the angular contact ball bearing will produce small pieces or pieces of metal spalling on the local area of the contact surface, forming pitting and pits, which increase the noise of parts running, aggravate vibration, increase temperature, accelerate wear, and lead to the failure of parts. Therefore, this factor should be considered in the production and design of angular contact ball bearings.
Three, processing performance
Bearing parts in the consumption process, to go through many cold and hot processing processes, in order to meet the requirements of high efficiency and high quality, bearing steel should have good processing performance. For example, cold and hot forming properties, machining properties, hardenability and so on.
Four, hardness
Hardness is one of the important quality standards of angular contact ball bearing, which has indirect influence on contact fatigue strength, wear resistance and elastic limit. The hardness of bearing steel in use should reach HRC61~65, which can make angular contact ball bearings obtain higher contact fatigue strength and wear resistance.
Hardness is a physical term that refers to the ability of a material to locally resist being pressed into its surface by a hard object, and is an indicator for comparing the softness and hardness of various materials.
Five, rust resistance
In order to avoid bearing parts and finished products being eroded and rusted in the process of processing, storage and application, bearing steel should have good anti-rust and anti-corrosion properties.