摘要
热处理过程中轴承内圈往往会产生较高的残余应力,导致其使用寿命和运行稳定性下降。为降低内圈热处理后的残余应力,提高其工作性能,以7008C型角接触球轴承内圈为研究对象,首先,利用直读光谱仪测得内圈材料元素含量,通过Jmatpro软件获得材料性能参数;其次,建立内圈淬回火过程的数值仿真模型,研究内圈残余应力的演化机理与分布规律,以及工艺参数对残余应力的影响;最后,以降低残余应力为优化指标,采用响应曲面法建立回归模型对工艺参数进行优化。结果表明,淬火后内圈滚道处的残余应力最大,约129 MPa,回火后残余应力降至71.6 MPa;淬回火工艺参数对残余应力的影响程度从大到小依次为淬火加热温度、淬火油温度、回火时间、回火温度;淬回火的最佳工艺参数组合为淬火加热温度820℃,淬火油温度88℃,回火温度207℃,回火时间2 h。
Higher residual stresses in bearing inner rings are often generated during heat treatment,which leads to a reduction in service life and operational stability.In order to reduce the residual stress in inner rings after heat treatment and improve its working performance,the inner rings of 7008C angular contact ball bearings are taken as research objects.Firstly,the elemental content of materials for inner rings is measured by direct reading spectrometer,and the material property parameters are obtained by Jmatpro software.Secondly,a numerical simulation model of inner rings during quenching and tempering is established to study the evolution mechanism and distribution law of residual stress in inner rings and the influence of process parameters on residual stress.Finally,with reduction of residual stress as optimization index,a regression model is established using response surface methodology to optimize the process parameters.The results show that the maximum residual stress in inner ring raceway is about 129 MPa after quenching,and its value is reduced to 71.6 MPa after tempering;the influencing degree of quenching and tempering process parameters on residual stresses from large to small is quenching heating temperature,quenching oil temperature,tempering time,tempering temperature;the optimal combination of quenching and tempering process parameters is quenching heating temperature of 820℃,quenching oil temperature of 88℃,tempering temperature of 207℃ for 2 h.
作者
谷瑞杰
仝怡
王强
陈辽原
邢浩
GU Ruijie;TONG Yi;WANG Qiang;CHEN Liaoyuan;XING Hao(School of Mechatronics Engineering,Henan University of Science and Technology,Luoyang 471003,China)
出处
《轴承》
北大核心
2024年第10期46-54,64,共10页
Bearing
基金
工信部高质量发展专项项目(TC220H05V-03)
河南省重点研发专项项目(231111221000)。
关键词
滚动轴承
角接触轴承
内圈
残余应力
工艺参数
rolling bearing
angular contact bearing
inner ring
residual stress
process parameter
