The characteristics and formation conditions of cracks in deep groove ball bearings: often occur in parts, raw materials, carbon strips, and longitudinal extensions with severe or non included segregation, cracks from the surface to the inside, deep cracks, and long hardenability.
Solution and preventive measures: Eliminate carbon tape and tissue, and isolate raw materials without excessive impurities; The reasonable development of heat treatment parameters should be influenced by human actions as much as possible.
The characteristics and formation conditions of quenching cracks: They do not often occur in quenched and carburized parts or components, and the cracks are located at the gap between the parts and the thickness at the tip of the wind.
Solution and preventive measures: The key is to develop a reasonable heat treatment process parameter to improve the skills of operators and attempt to eliminate human operational factors; The optimal use of designed arc transitions to avoid sharp corners.
The characteristics and conditions for forming quenching cracks: Grinding cracks are easily formed on the surface.
Solution and preventive measures for high hardness of parts: sufficient heat treatment for tempering; The grinding feed rate is small, reducing the heat generated during grinding.
Damage to bearings: Generally, if deep groove ball bearings are used correctly, they can be used until reaching their fatigue life. But there may be unexpected and premature damage, making it difficult to use. This early damage, as opposed to fatigue life, is the quality usage limit known as a failure or accident. It is often caused by carelessness in installation, use, and lubrication, foreign objects invading from the outside, and insufficient research on the thermal effects of shafts and casings