为研究Cr4Mo4V钢制轴承套圈磨削变质层深度的测定方法,用X射线衍射法测定了Cr4Mo4V钢制轴承套圈滚道磨削表层残余应力及X射线衍射线半高宽,用显微硬度计测定了套圈轴向截面显微硬度分布。结果表明:滚道表层残余应力均呈指数型分布,曲线拟合相关系数在0.98以上;半高宽由表及里逐渐增大,但分布相对离散,曲线拟合相关系数一般在0.8左右;显微硬度分布相当离散。可以用磨削残余应力影响深度作为Cr4Mo4V钢磨削变质层深度。

The residual stress on grinding affected layer and the full width at half maximum (FWHM) of bearing ring made from Cr4Mo4V steel had been measured by X-ray diffraction, and the axial intersection microhardness of the bearing ring had been measured to investigate the measurement method of the grinding affected layer depth. the results showed that the residual stress distributions on raceway surface layer were all exponential, the correlation coefficients of regressive curve were 0.98 above; FWHM increased from the surface to subsurface gradually, but FWHM were relatively disperse, the correlation coefficients of regressive curve were generally 0.8 about; microhardness distributions were very disperse. Grinding residual stress affected depth can be usedas grinding affected layer depth of Cr4Mo4V steel.