Influence of steel composition on machinability while turning with intermittent cutting
Project ID: 7210-MA/114Funded under: ECSC-STEELRES 7C
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.
Bibliographic Reference: EUR 13194 DE (1991) 87 pp., FS, ECU 10
ISBN: ISBN 92-826-2081-6
Record Number: 199110244 / Last updated on: 1994-12-02
Original language: de
Available languages: de