轴承的零件都是由轴承钢制造而成，并且经过高温回火处理，其后需要依照代号JB/T2974所规定的方式进行选型。
The bearings are made of bearing steel and are processed by high temperature tempering, which shall be selected according to the method specified in JB/T2974.
轴承的零部件是由耐热钢材制造而成，其后置代号按照JB/T2974的规定，选择材料为Cr4Mo4V，而后置代号为/HN，而所使用材料为Cr14Mo4，而后置代号使用的是/HN1，则材料为Cr15Mo4V。
Bearing components is made from heat resistant steel, then buy code in accordance with the provisions of the JB/T2974 for Cr4Mo4V select material, and then buy code-named/HN, the materials used for Cr14Mo4, then buy code/HN1 is used the material as Cr15Mo4V.
高温轴承所选择的材料也有一定的要求，这种钢材具有足够的高的高温硬度、高温耐磨性、高温接触疲劳强度、抗氧化性和高温尺寸稳定性。
High temperature bearing of the selected material also has certain requirements, the steel has high enough high temperature hardness, high temperature wear resistance, high temperature and contact fatigue strength, high temperature oxidation resistance and dimensional stability.
所使用 高温轴承钢主要有三个不同的类型：
There are three main types of high temperature bearing steel:
Cr4Mo4V钢属于性能优良的耐热轴承钢，在高温环境下具有较高的硬度以及疲劳寿命，主要用于航空发动机，可以在315℃温度下保持长期工作状态，而短时间则可以在430℃环境下使用。
Cr4Mo4V belongs to the good performance of heat resistant bearing steel, steel in high temperature environment with high hardness and fatigue life, it is mainly used for aircraft engine, can maintain long-term working state under the temperature 315 ℃, and the short time can be used under the environment of 430 ℃.
Cr15Mo4钢在260～280℃范围内，具有较高的硬度以及耐腐蚀性，可以制造480摄氏度环境下工作的耐腐蚀轴承，其主要用于喷气发动机和导弹。
Cr15Mo4 steel within 260 ~ 280 ℃, has higher hardness and corrosion resistance, can produce 480 degrees Celsius work under the environment of the corrosion resistance of the bearing, it is mainly used for jet engines and missiles.
12Cr2Ni3Mo5属于广泛应用的一种高温渗碳轴承钢，比较适合使用在430℃以下工作环境中，其可以用来制造形状复杂和承受冲击的高温轴承。
12 cr2ni3mo5 belongs to a kind of widely used high temperature carburizing bearing steel, is suitable for use in the work environment under 430 ℃, it can be used to make complex shape and withstand the impact of high temperature bearing.
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