深冷处理对GCr15轴承钢性能的影响  

Effect of Deep Cryogenic Treatment on Performances of Bearing Steel GCr15

作　　者：李辉[1] 尹甜甜[1] 刘勇[2] 

机构地区：[1]开封大学机械与汽车工程学院,河南开封475004 [2]河南科技大学材料科学与工程学院,河南洛阳471023

出　　处：《轴承》2015年第8期41-44,共4页Bearing

摘　　要：对GCr15轴承钢进行了不同时间的深冷处理,对其微观组织形貌和力学性能进行了表征。结果表明:随着深冷处理时间的延长,残余奥氏体含量大幅下降,马氏体晶界上有亚微米级碳化物颗粒析出,提高了轴承钢的强度和耐磨性;硬度呈小幅上升趋势,冲击功有所下降。The deep cryogenic treatment is carried out for bearing steel GCrl5 under different time, and the microstruc- tures and mechanical properties are characterized. The results show that the content of retained austenite greatly decrea- ses with the increase of time of deep cryogenic treatment, and some submicron scale carbides precipitate along bounda- ries of martensite laths, which may raise strength and wear resistance of bearing steel. Meanwhile, the hardness increa- ses no obviously, and the impact value decrease a little.

关 键 词：GCR15钢 深冷处理 微观组织 残余奥氏体 相对耐磨性 

分 类 号：TH133.33[机械工程—机械制造及自动化] TG142[一般工业技术—材料科学与工程]