Analysis of Surface State after Turning of High Tempered Bearing Steel

Materials

Peter Minárik¹  Karel Kouřil²  Miroslav Neslušan³  Anna Mičietová³  Mária Čilliková³  Róbert Čep⁴  Martina Jacková⁵ 

[1] Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 12116 Prague, Czech Republic;Faculty of Mechanical Engineering, Brno University of Technology, Technická 2896/2, 61669 Brno, Czech Republic;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;Research Centre, University of Žilina, Univerzitná 1, 01026 Žilina, Slovakia;

关键词: white layer;    microhardness;    turning;    surface state;   

DOI  :  10.3390/ma15051718

来源: DOAJ

【 摘 要 】

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 VB as well as cutting speed v_c. 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 F_γ and consumed in the flank wear land F_α. It was found that the mechanical energy expressed in terms of the shear components of the F_α grows with VB, 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 VB region should also be taken into account. It was also found that the influence of VB predominates over the variable cutting speed.

【 授权许可】

Unknown