Built-up Edge Elimination in Mirror Cutting of Hardened Steel

[+] Author and Article Information
K. Oishi

Industrial Research Institute of Kanagawa Prefecture, 3173 Showa-machi, Kanazawa-ku, Yokohama, 236 Japan

J. Eng. Ind 117(1), 62-66 (Feb 01, 1995) (5 pages) doi:10.1115/1.2803279 History: Received December 01, 1992; Revised February 01, 1994; Online January 17, 2008


A built-up edge will normally give a poor finish. The conventional way of eliminating the built-up edge is to increase cutting speed and feed (i.e., increase tool face temperature). It is shown here that a built-up edge can also be eliminated if the workpiece hardness is above a critical value. This critical value is such that the workpiece hardness be somewhat greater than half the hardness of the built-up edge that forms at low hardness and speed, since the built-up edge hardness is between 2 and 3 times the corresponding workpiece hardness. It is suggested the reason for this is that the hardness of the workpiece must be less than the hardness of the built-up edge, otherwise the built-up edge disappears. This new method of eliminating the built-up edge by use of hard work material prevents built-up edge formation even at low feeds and speeds, thus making it possible to produce extremely a good (mirror) finish under these conditions.

Copyright © 1995 by The American Society of Mechanical Engineers
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