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轴承钢管是用多种工艺生产的.用管坯生产的钢管,表面有一层脱碳层,脱碳量的多少是随所使用的方法而变化的.按照在热加工过程中使用的加热方法和热加工之后使用的冷却方法,在最好的情况下,这些钢管的金相组织是细晶粒的珠光体组织(也可能有硬度约为HV400的索氏体组织),但是,如果是厚壁管,它的金相组织通常是粗晶粒的珠光体组织.这种金相组织对于在以后进行的冷加工之前,进行球化是必需的.
Bearing steel pipe is produced by a variety of processes.Welded steel pipe production, the surface layer of decarburization, the amount of decarburization varies with the method used according to the heat used in the heating process and heat The cooling methods used after processing are, in the best case, the microstructure of these tubes as fine-grained pearlite (sorbite with a hardness of approximately HV400 may also be present), but in the case of thick-walled tubes , Its metallurgical structure is usually coarse grain pearlite microstructure This microstructure for the cold before the next process, the ball is necessary.