淬火方式对薄壁轴承套圈变形的影响

Effect of Quenching Methods on Deformation of Thin-walled Bearing Rings

对型号为71868/01的薄壁轴承套圈分别进行盐浴淬火、分级淬火油淬火和旋转式淬火机油淬火。研究了不同淬火方式下薄壁轴承套圈的椭圆变形和翘曲变形规律,分析了不同淬火方式因淬火介质和冷却机制不同对套圈椭圆变形和翘曲变形的影响。结果表明:盐浴淬火可以减少椭圆变形,同时会导致薄壁轴承套圈翘曲变形的增加;分级淬火油淬火可以减少翘曲变形,但椭圆变形显著增多。旋转式淬火机油淬火提高了淬火的均匀性,可以有效减少套圈的椭圆变形和翘曲变形,减少整变形的难度和工作量,提高产品的合格率。

The 71868/01-type thin-walled bearing rings were subjected to salt-bath quenching,quenching by stepped quenching oil and oil-quenching by rotation quenching machine,respectively.The elliptic deformation and warping deformation of thin-wall bearing rings under different quenching methods were investigated.The effect of quenching methods on the elliptical deformation and warping deformation was studied by analyzing the differences of quenching media and cooling mechanism.The results show that elliptic deformation of thin-walled bearing rings is reduced by salt bath quenching with an increase in warping deformation.Quenching by stepped quenching oil makes a reduction in warping deformation,however,elliptical deformation increases.The rotation quenching machine oil-quenching improves the uniformity of quenching,and effectively reduces both elliptic deformation and warping deformation.Furthermore,it reduces the difficulty and work load of deformation modification.The qualified rate of products is also improved.