Tool Wear in Milling Hardened Die Steel

[+] Author and Article Information
S. Nelson, J. K. Schueller, J. Tlusty

Department of Mechanical Engineering, University of Florida, Gainesville, Florida 32611

J. Manuf. Sci. Eng 120(4), 669-673 (Nov 01, 1998) (5 pages) doi:10.1115/1.2830205 History: Received August 01, 1996; Revised April 01, 1997; Online January 23, 2008


Tool wear is an important limiting factor in machining hardened steel. Plane milling of H13 hot work tool steel (42–46 HRC) was conducted on a three-axis machine to obtain flank wear data with the objective of finding operating parameters providing extended tool life. Microgram carbide and PCBN tipped carbide round inserts in an off-center ball nose end mill with a single cutting edge were considered. Tool life was longer for the micrograin carbide inserts when cutting speeds were near 150 m/min. The PCBN grades performed best at the highest speed tested. A limited radial and axial depth of cut with a larger maximum chip thickness provided the best tool life over the parameters tested.

Copyright © 1998 by The American Society of Mechanical Engineers
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