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The main aim of this research was to explore the wear behaviour of steels when turning with an interrupted cut. The Taylor-lines show a tool life advantage for the normalised Ck 45 N at a higher cutting speed. The controlled cooled steels (BY-treated) have a better tool life at lower cutting speeds. The achievable feed rate strongly depends on the machined workpiece and its grain structure. The BY-treated steels are characterised by a slow increase in wear. At a feed above f=0.25 mm, the tool fails by breakage before reaching the wear criterion of VB(B)=0.3 mm. Normalised Ck 45 N allows a higher possible feed of this steel without early tool breakage. The same results could be seen when machining 16 MnCrS 5 BG. The Taylor-curves elucidate the great advantage in tool life when turning 26 MnSiVS 6 BY with an interrupted cut. This tool life improves with lower cutting speed. A variation of the cutting edge-contact rate when turning Ck 45 N gives a parabolic behaviour with a tool life maximum at a contact rate H(E)=20.9%. The use of 26 MnSiVS 6 BY and 16 MnCrS 5 BG show a comparable behaviour.

Additional information

Authors: TÖNSHOFF H K, Universität Hannover, Institut für Fertigungstechnik und spanende Werkzeugmaschinen, Hannover (DE);TONSHOFF H K, Universitat Hannover, Institut fur Fertigungstechnik und spanende Werkzeugmaschinen, Hannover (DE)
Bibliographic Reference: EUR 13194 DE (1991) 87 pp., FS, ECU 10
Availability: (2)
ISBN: ISBN 92-826-2081-6
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