摘要
对GCr15轴承钢深沟球轴承套圈进行冷辗扩实验和模拟,用有限元仿真、微观组织观察、残余应力和力学性能测试等手段研究了进给速度对其残余应力的分布、碳化物的析出行为和硬度的影响。结果表明,进给速度为0.50 mm/s时冷辗扩模拟得到套圈外表面残余压应力均值为-170.49 MPa,与实验测定值-160.10 MPa只差6.49%,表明这种模拟的可靠性。随着进给速度的提高(为0.70或0.90 mm/s)套圈变形速率随之提高,心部与表层之间的相对变形量和残余应力增大;套圈内表层碳化物分布均匀,颗粒细小,沟槽处碳化物的平均尺寸最小,分布最密集。套圈的硬度沿径向变化,内表面的硬度比外表面的高,沟槽处的硬度最大。
Herein,the effect of deformation rate on the residual stress distribution,carbide precipitation behavior and hardness of the cold rolled expanding deep groove ball bearing rings of GCr15 steel were studied by means of microstructure observation,residual stress and mechanical property measurements as well as finite element simulation.According to the finite element simulation with three different feed rates of 0.50,0.70 and 0.90 mm/s respectively for the cold rolling process,it follows that the mean residual compressive stress on the outer surface of the bearing ring is-170.49 MPa when the feed rate is 0.50 mm/s,which is only 6.49%different from the experimental result of-160.10 MPa,indicating the reliability of the simulation.With the increase of feed rate,the deformation rate of the ring increases,the relative deformation between the core and the surface layer increases,and the residual stress also increases.The carbides in the inner surface layer of the ring are uniformly distributed and fine.The distribution of carbides is the densest and their average size is the smallest and their average size is the smallest in the groove.The hardness of the ring varies along the radial direction,the inner surface has greater hardness than the outer surface,and the groove position has the maximum hardness.
作者
苏勇
刘灿
张宏伟
于兴福
郝天赐
SU Yong;LIU Can;ZHANG Hongwei;YU Xingfu;HAO Tianci(School of Mechanical and Power Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China;Meteorological Center of Air Traffic Administration in Northeast China,Shenyang 110169,China;School of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870,China;School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China)
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2024年第10期782-790,共9页
Chinese Journal of Materials Research
基金
辽宁省教育厅项目(LJKM20220770)。
关键词
金属材料
GCR15
冷辗扩
数值模拟
轴承套圈
metallic materials
GCr15
cold rolling
numerical simulation
bearing ring
