GCr15钢制轴承是世界各国产量最大、用途最广的轴承。近年发现,它们在磨削加工中出现瞬时高温致使在表层内形成的磨剥变质层和氧化膜,对其耐磨性、疲劳寿命、滚道“色变”有着严重的影响。显然,研究其氧化膜的结构具有基本的意义。目前冶金化学、工程材料界认为铁的氧化是氧由表及里的扩散反应,在氧气充足的外层生成Fe_2O_3(主要为α-Fe_2O_3), GCr15 steel bearing is the largest output in all countries, the most widely used bearings. In recent years, they found that the instantaneous high temperature in the grinding process caused the dermabrasion and oxide films formed in the surface layer to have a serious impact on their wear resistance, fatigue life and raceway “discoloration”. Obviously, to study the structure of the oxide film has a basic meaning. At present, the metallurgical and engineering materials circles think that the oxidation of iron is the diffusion reaction of oxygen from the surface and the inside, and Fe_2O_3 (mainly α-Fe_2O_3) is formed on the outer layer of oxygen sufficient,