The constituent elements of bearing steel mainly include carbon, chromium, manganese, silicon, molybdenum, etc. These elements change the microstructure and performance of bearing steel to meet the requirements of different use environments.
Carbon (C): Improves the hardness and strength of bearing steel, the content is generally 0.95-1.10%.
Chromium (Cr): Improves the wear resistance, corrosion resistance and hardness of bearing steel. The content is generally 1.45-1.75%.
Manganese (Mn): Improves the strength, hardness and toughness of bearing steel. The content is generally 0.25-0.50%.
Silicon (Si): Improves the strength and hardness of bearing steel, the content is generally 0.15-0.35%.
Molybdenum (Mo): Improves the hardness, wear resistance and toughness of bearing steel. The content is generally 0.15-0.30%.
Vanadium (V): refines the grains of bearing steel and improves strength and toughness. The content is generally 0.05-0.20%.
Titanium (Ti): Improves the corrosion resistance and wear resistance of bearing steel. The content is generally 0.01-0.10%.
In addition to the above common alloying elements, there are some other elements, such as nickel (Ni), copper (Cu), aluminum (Al), etc., which are added to bearing steel according to specific needs to improve its performance. The contents of these alloying elements are generally low, but they have an important impact on the performance of bearing steel.
It should be noted that the effects and contents of different alloying elements will affect the performance and characteristics of bearing steel. Therefore, various factors need to be considered comprehensively when selecting and using bearing steel, including working environment, usage requirements, cost, etc. In addition, the addition of alloying elements will also increase the cost and processing difficulty of bearing steel, so there is a trade-off between performance and cost.
