Mičietová Anna, Čilliková Mária, Čep Róbert, Neslušan Miroslav, Ganev Nikolaj
Faculty of Mechanical Engineering, University of Žilina, Univerzitná 1, 010 26 Žilina, Slovakia.
Faculty of Mechanical Engineering, VŠB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 00 Ostrava, Czech Republic.
Materials (Basel). 2023 Feb 17;16(4):1709. doi: 10.3390/ma16041709.
This paper investigates the influence of cutting speed and flank wear on the depth profile of residual stresses, as well as the fraction of retained austenite after hard turning of quenched bearing steel 100Cr6. Residual stress and retained austenite profiles were studied for the white layer, heat-affected zone thickness, and XRD sensing depth. It was found that the influence of flank wear on the white layer and heat-affected zone thickness predominates. On the other hand, residual stresses are affected the cutting speed and the superimposing contribution of flank wear. Moreover, these aspects also alter microhardness in the affected regions. The study also demonstrates that information concerning residual stresses and the austenite fraction is integrated into the white layer, and the heat-affected zone in the surface is produced by the insert of low flank wear since the XRD sensing depth is more than the thickness of the white layer. On the other hand, the pure contribution of the white layer or the heat-affected zone to residual stress and the austenite fraction can be investigated when the affected surface region is thick enough.
本文研究了切削速度和后刀面磨损对残余应力深度分布的影响，以及对淬火轴承钢100Cr6进行硬车削后残余奥氏体的比例。研究了白层、热影响区厚度和X射线衍射（XRD）传感深度的残余应力和残余奥氏体分布。结果发现，后刀面磨损对白层和热影响区厚度的影响占主导地位。另一方面，残余应力受切削速度和后刀面磨损叠加作用的影响。此外，这些方面也会改变受影响区域的显微硬度。该研究还表明，关于残余应力和奥氏体分数的信息整合在白层中，并且由于XRD传感深度大于白层厚度，因此表面的热影响区是由低后刀面磨损的刀片产生的。另一方面，当受影响的表面区域足够厚时，可以研究白层或热影响区对残余应力和奥氏体分数的纯贡献。
