中文摘要：

以轴承钢顺次磨削表面的残余应力离散度为研究对象,基于X射线衍射法顺次测试了轴承套圈淬硬热处理、粗磨、精磨和超精磨削后,轴承滚道表面环向和轴向残余应力。测试结果表明,淬硬热处理工件的残余应力标准差约为超精工序的3倍;淬硬热处理轴承套圈经超精磨削工序,其表面的环向和轴向残余应力离散度降至20MPa。研究表明淬硬轴承钢热处理及同一道磨削工序工件表面残余应力存在较大离散性,＂粗磨-精磨-超精＂顺次磨削工艺叠加后,工件表面残余应力离散度呈现收敛性;淬硬热处理轴承套圈经过顺次磨削工序叠加加工后,表面残余压应力平均值获得大幅提高。这为进一步系统揭示磨削工艺对淬硬轴承钢套圈表面残余应力及其离散度影响规律提供了科学数据。

英文摘要：

To evaluate surface residual stresses scatter when AISI 52100 steel is sequentially ground in the actually industrial application, it focuses on measuring the bearing inner rings’ raceway surface residual stresses resulted from heat treatment, rough grinding, finish grinding and super-finish grinding process. Both surface residual stresses along the circumferential and axial direction are measured by X-ray diffraction technique. Measurement data show that the residual stress standard tolerance of heat treatment surface is 3 times higher than that of the super-finished, and the surface residual stresses along circumferential and axial direction of bearing inner rings decrease to 20 MPa after super-finishing. It reveals that surface residual stress scatter occurs remarkable within the same heat treatment and abrasive-based processes; the sequential grinding processes favorably reduce the surface residual stress scatter, which converges when AISI 52100 steel is sequentially rough-grinding, finish-grinding, and super-finish grinding. Fortunately, the average surface residual stress of AISI 52100 steel enhances gradually by sequential grinding processes. The experimental investigation provides a scientific data to systemically evaluate and optimize grinding processes on AISI 52100 steel components.