Abstract
The present work is a contribution in understanding the machinability of hardened C22 steel under drilling operations using twist high-speed steel (HSS) grade drill bits. Experimental investigation has been conducted on annealed and hardened C22 steel according to the planning experience methodology (L8). The input parameters are cutting regime elements, cutting speed, feed rate, and drill diameter; meanwhile, the output parameter is the tool wear related to tool life. Apart from the common observation that tool life decreases when the cutting speed increases, the most interesting phenomenon is the controversial effect of the cutting speed when drilling the steel in hardened condition. The latter has been assessed through exploratory chip microstructure observations.
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Acknowledgements
This work is achieved in the LRTAPM, laboratory of advanced technology in mechanical engineering of Badji Mokhtar-Annaba University, in collaboration with the LEM3, material mechanics, and microstructure studies of the University of Lorraine, Metz, France
Funding
Financial support is due to the general direction of scientific research and technological development (DGRSDT) of the Algerian ministry of higher education and scientific research (MESRS) under the CNEPRU research project LRTAPM: A11N01UN230120130011 (Annaba).
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Mokas, N., Boulanouar, L., Amirat, A. et al. Effect of hardening on the machinability of C22 steel under drilling operations using twist HSS drill bit. Int J Adv Manuf Technol 96, 3227–3234 (2018). https://doi.org/10.1007/s00170-018-1818-z
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DOI: https://doi.org/10.1007/s00170-018-1818-z