稀土Y对GCr15轴承钢力学性能的影响
Effect of Rare Earth Y on Mechanical Properties of GCr15 Bearing Steel
车治强 1杨吉春 1刘香军 1杨昌桥1
作者信息
- 1. 内蒙古科技大学 材料与冶金学院,内蒙古 包头 014010
- 折叠
摘要
为探究稀土Y对GCr15轴承钢力学性能的影响,采用真空感应炉冶炼了不同Y含量的GCr15 轴承钢,利用MC010-HV-30Z维氏硬度计、SANS-ZBC2752A型冲击试验机、CSS-88500 型电子万能试验机、JSM-6510 型扫描电子显微镜和Sigma-300 场发射电子显微镜等设备,研究Y对GCr15 轴承钢硬度、冲击性能、拉伸性能及夹杂物的影响.结果显示:Y含量为 0.005%时,试验钢具有较好的综合力学性能;Y略微降低了GCr15 轴承钢的硬度,由 258.7 HV降低到254.4 HV;冲击功提高了17.9%,由17.9 J提高到 21.1 J;抗拉强度提高了 6.50%,由 903.8 MPa提高到963.3 MPa;最大拉应力提高了 6.50%,由 17.75 kN提高到 18.91 kN;断后伸长率提高了 16.80%;试验钢的断裂模式由沿晶断裂向穿晶断裂过度;Y处理后,夹杂物尺寸由3μm左右减小为1μm左右.试验钢的硬度略微降低,冲击功、抗拉强度、断后伸长率均有所提高,夹杂物尺寸减小.
Abstract
In order to explore the effect of rare earth Y on the mechanical properties of GCr15 bearing steel,GCr15 bearing steels with different Y contents were smelted by vacuum induction furnace.The effects of Y on the hardness,impact property,tensile property and inclusion of GCr15 bearing steel were studied by using MC010-HV-30Z Vickers hardness tester,SAN-ZBC2752A type impact testing machine,CSS-88500 type electronic universal testing machine,JSM-6510 type scanning electron microscope,and Sigma-300 field emission scanning electron microscope.The results show that when Y content is 0.005%,the test steel has good comprehensive mechanical properties.Y slightly reduces the hardness of GCr15 bearing steel from 258.7 HV to 254.4 HV.The impact energy increases by 17.9%from 17.9 J to 21.1 J.The tensile strength increases by 6.50%from 903.8 MPa to 963.3 MPa.The maximum tensile stress increases by 6.50%from 17.75 kN to 18.97 kN.The elongation after fracture increases by 16.80%.The fracture mode of the test steel transforms from intergranular fracture to transgranular fracture.After Y treatment,the inclusion size decreases from about 3 μm to about 1 μm.The hardness of the test steel decreases slightly,the impact energy,tensile strength and elongation after breaking increase somewhat,and the inclusion size decreases.
关键词
GCr15轴承钢/稀土Y/力学性能/断口形貌/夹杂物Key words
GCr15 bearing steel/rare earth Y/mechanical properties/fracture morphology/inclusions引用本文复制引用
基金项目
国家自然科学基金(51774190)
内蒙古自治区自然科学基金(2020MS05072)
出版年
2024
NETL
NSTL
万方数据