Relationship Between Alloy Composition and Tool-Life of High-Speed Steel Twist Drills

[+] Author and Article Information
W. E. Henderer

Vermont Tap & Die Company, Lyndonville, VT

J. Eng. Mater. Technol 114(4), 459-464 (Oct 01, 1992) (6 pages) doi:10.1115/1.2904199 History: Received April 10, 1991; Revised February 11, 1992; Online April 29, 2008


Tool-life tests are reported which show the relationship between the alloy composition of high-speed steel twist drills and performance. Tool-life is shown to depend primarily on the composition of the matrix consisting of tempered martensite and precipitated secondary carbides. The longest tool-life was obtained from alloys with high vanadium content and low tungsten or molybdenum content. This observation is consistent with the dispersion characteristics of vanadium carbide which precipitate during tempering.

Copyright © 1992 by The American Society of Mechanical Engineers
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