Rolling bearing is a type we often use in our daily life, rolling bearing mainly consists of outer ring, inner ring, rolling body and cage combination. For the rolling bearing collar and rolling body, the choice of material is very important, these two parts can determine the performance of rolling bearing use, we can choose according to the needs of the rolling bearing collar and rolling body material. 1、High carbon chromium bearing steel Most of the bearing rings and rolling body are colored with special steel manufacturing. With high-carbon chromium bearing steel (GCr15 and GCr15SiMn and ZGCr15 and ZGCr15SiMn) manufacturing rings and rolling elements, the parts hardness as follows. HRc61~65 for rings and rollers made with GCr15 and ZGCr15 materials, and HRc62~66 for steel balls. With GCr15SiMn and ZGCr15SiMn material manufacturing rings and rollers for HRc60 ~ 64, steel balls for HRc60 ~ 66. Bearings made of high carbon steel chromium bearing steel are generally suitable for working temperature range of -40~130 degrees, with normal oil and grease lubrication. Can meet the requirements of general machinery. High-carbon chromium bearing steel bearing parts by high-temperature tempering, its adaptation to the working temperature can be as high as 250 degrees. 2、Carburized bearing steel With carburized bearing steel and other manufacturing rings and rolling bodies, its hardness: rings and rolling bodies for HRc60 ~ 64, generally suitable for the working temperature of -40 ~ 140 degrees Celsius range, oil and grease lubrication is normal, can be used in larger shock vibration conditions, such as rolling stock and rolling mill bearings, but the heat treatment process of the steel is more complex. 3, heat-resistant bearing steel The rolling body of the ring made of heat-resistant bearing steel, its hardness: rings and rollers for HRc60 ~ 64, steel balls for HRc61 ~ 65, in the case of normal lubrication, for the working temperature of 120 ~ 250 degrees Celsius, such as aircraft engines, gas turbines and other spindle working conditions. 4、Corrosion-resistant bearing steel With corrosion-resistant bearing steel manufacturing rings and rolling bodies, its hardness: rings and rolling bodies should not be lower than HRc58, suitable for water, nitric acid, chemical reagents and other corrosive media, the temperature of -253 ~ 350 degrees Celsius.

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