‌The mechanical properties and metallographic structure analysis of bearing materials is essential to ensure the performance and life of bearings. ‌

First of all, the mechanical properties of bearing materials are the key indicators to evaluate their quality, mainly including hardness, strength and toughness. Hardness is one of the important indicators of bearing steel, which is usually required to be above HRC60 to ensure that the bearing surface has sufficient wear resistance and pressure resistance. Strength refers to the tensile strength of the bearing steel, which is usually required to be above 1000MPa to ensure the stability of the bearing when it is subjected to heavy loads. Toughness, especially impact resistance, is also an important consideration for bearing materials and is usually required to be above AKV to ensure that bearings are not easy to break when confronted with impact loads.

Metallographic analysis is to evaluate the performance of bearing materials by observing and analyzing their microstructure. For example, the metallographic structure of GCr18Mo bearing steel mainly includes martensite, bainite and residual austenite. Among them, martensite is the main structure of bearing steel after quenching, with high hardness and high strength; Bainite is the main structure of tempered bearing steel, which has excellent wear resistance and fatigue strength. Residual austenite is an important factor to improve bearing toughness.

In summary, the mechanical properties and metallographic structure analysis of bearing materials is a key step to ensure the quality and performance of bearings, through which the hardness, strength, toughness and other mechanical properties of the material can be evaluated, as well as the microstructure and microstructure of the material, so as to ensure the reliability and durability of the bearing in practical applications.