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1.引言 奥氏体晶粒和碳化物颗粒大小是影响轴承钢性能的两个主要因素。细小的奥氏体晶粒可以提高轴承钢的强韧性,特别是碳化物颗粒的细化可以成倍地提高轴承的接触疲劳寿命。轴承套圈通常的制造工艺使零件的晶粒度一般为9级,碳化物颗粒尺寸为0.5～0.7μm。此组织
1. Introduction The size of austenite grains and carbide particles are two major factors that affect the performance of bearing steels. Small austenite grains can improve the toughness of bearing steel, especially the refinement of carbide particles can exponentially increase the bearing contact fatigue life. The usual manufacturing process of the bearing rings gives the parts a typical grain size of 9 grades and a carbide grain size of 0.5-0.7 μm. This organization