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RESEARCH PAPERS

Strengthening Mechanisms in High-Speed Steel as Related to Tool-Life

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

Vermont Tap and Die Company, Lyndonville, Vermont 05851

J. Eng. Ind 101(2), 217-222 (May 01, 1979) (6 pages) doi:10.1115/1.3439498 History: Received July 25, 1978; Online July 15, 2010

Abstract

Tool-life tests are reported which show that the performance of AISI M1 high speed steel taps responds to the tempering temperature in the same manner as the yield strength. The metallurgical transformations which occur during tempering are described in detail with specific attention given to the precipitation reactions which occur over the temperature range of peak secondary hardness. The variation in yield strength is found to be consistent with a coherent-incoherent precipitation sequence of alloy carbides during tempering. An estimate of the yield strength is made based on dislocation theories of martensitic and precipitation strengthening.

Copyright © 1979 by ASME
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