Čilliková Mária, Mičietová Anna, Čep Róbert, Jacková Martina, Minárik Peter, Neslušan Miroslav, Kouřil Karel
Faculty of Mechanical Engineering, University of Žilina, Univerzitná 1, 01026 Žilina, Slovakia.
Faculty of Mechanical Engineering, VŠB-Technical University of Ostrava, 17. Listopadu 2172/15, 70800 Ostrava, Czech Republic.
Materials (Basel). 2022 Feb 24;15(5):1718. doi: 10.3390/ma15051718.
This paper investigates surface state after turning of the high tempered bearing steel 100Cr6 with a hardness of 40 HRC. White layer (WL) thickness and its microhardness, as well as surface roughness, are investigated as a function of tool flank wear as well as cutting speed . The mechanical and thermal load of the machined surface were analysed in order to provide a deeper insight into their superimposing contribution. Cutting energy expressed in terms of cutting force was analyses as that consumed for chip formation and consumed in the flank wear land . It was found that the mechanical energy expressed in terms of the shear components of the grows with , converts to the heat and strongly affects the thickness of the re-hardened layer. Furthermore, the superimposing contribution of the heat generation and its duration in the region should also be taken into account. It was also found that the influence of predominates over the variable cutting speed.
本文研究了硬度为40 HRC的高回火轴承钢100Cr6车削后的表面状态。研究了白层（WL）厚度及其显微硬度以及表面粗糙度随刀具后刀面磨损和切削速度的变化情况。对加工表面的机械和热负荷进行了分析，以便更深入地了解它们的叠加作用。以切削力表示的切削能量被分析为切屑形成所消耗的能量以及在后刀面磨损区域所消耗的能量。结果发现，以剪切分量表示的机械能随切削速度增加，转化为热量并强烈影响再硬化层的厚度。此外，还应考虑在磨损区域产生热量及其持续时间的叠加作用。还发现切削速度的影响比切削速度变化的影响更为显著。
