Chapter 51. Submicrometer Cutting Tools on the Basis of Al2O3 for Machining Alloyed Hard Cast Iron and Hardened Steel
- Ersan Ustundag and
- Gary Fischman
Published Online: 26 MAR 2008
Copyright © 1999 The American Ceramic Society
23rd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 20 Issue 4
How to Cite
Krell, A., Blank, P., Berger, L.-M. and Richter, V. (1999) Submicrometer Cutting Tools on the Basis of Al2O3 for Machining Alloyed Hard Cast Iron and Hardened Steel, in 23rd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B: Ceramic Engineering and Science Proceedings, Volume 20 Issue 4 (eds E. Ustundag and G. Fischman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294574.ch51
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 1999
Print ISBN: 9780470375648
Online ISBN: 9780470294574
Tool wear decreases when the grain size of the ceramics is reduced in the submicrometer range. On machining hard cast iron (HRC=42–44), a great leap towards smaller flank wear is observed with pure Al2O3 ceramics, i.e. if any tribo-chemical interaction of the metal shaft with the tool material is avoided. However, on machining hardened steel (HRC=57–60), submicrometer Al2O3/Ti(C,O) composites exhibit the highest wear resistance at intermediate velocities (220 m/min). At higher velocity, thermodynamic and chemical instability deteriorates the wear of these tools, and at 300 m/min again pure alumina shows the best performance.
The preparation of as-received rough (hard) shafts requires a high tool stability under interrupted cutting conditions. Pure submicrometer alumina was successfully applied with 120 m/min (2 mm depth of cut, feed 0.3 mm/rev) whereas CBN and hard metal tools failed.