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Material selection of rolling bearing rings and rolling elements

wallpapers Industry 2020-11-12
1. High carbon chromium bearing steel
 
Most bearing rings and rolling elements are made of special steel. Use high carbon chromium bearing steel (GCr15 and GCr15SiMn and ZGCr15 and ZGCr15SiMn) to manufacture ferrules and rolling elements. The hardness of the parts is as follows:
 
Rings and rollers made of GCr15 and ZGCr15 materials are HRc61~65, and steel balls are HRc62~66;
 
Rings and rollers made of GCr15SiMn and ZGCr15SiMn materials are HRc60~64, and steel balls are HRc60~66.
 
Bearings made of high-carbon steel chromium bearing steel are generally suitable for operating temperature in the range of -40 to 130 degrees, and oil and grease lubrication is normal. It can meet the requirements of general machinery.
 
After high-carbon chromium bearing steel bearing parts have been tempered at high temperature, their working temperature can be as high as 250 degrees.
 
2. Carburized bearing steel
 
The hardness of the rings and rolling elements made of carburized bearing steel is: the rings and rolling elements are HRc60~64, generally suitable for the working temperature range of -40~140 degrees Celsius, oil and grease lubrication is normal and can be compared It is used under large shock and vibration conditions, such as bearings for rolling stock and rolling mills, but the heat treatment process of this steel is more complicated.
 
3. Heat-resistant bearing steel
 
The hardness of the rolling element of the ferrule is made of heat-resistant bearing steel: the ferrule and roller are HRc60~64, and the steel ball is HRc61~65. Under normal lubrication, the working temperature is 120~250 degrees Celsius. Such as main shaft working conditions such as aero engines and gas turbines.
 
4. Corrosion-resistant bearing steel
 
The ferrules and rolling elements are made of corrosion-resistant bearing steel. The hardness of the ferrules and rolling elements should not be lower than HRc58. It is suitable for corrosive media such as water, nitric acid and chemical reagents, and the temperature is -253~350 degrees Celsius.

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