Metallurgical Transactions

, Volume 2, Issue 1, pp 65–78 | Cite as

The rapid heat treatment of steel

  • R. A. Grange

Abstract

The technique of austenitizing steel by heating rapidly through the Ac1 to Ac3 range, limiting the maximum temperature to the minimum required for complete austenitization and quenching immediately is discussed. Rapid austenitizing refines the austenite grain size if the initial microstructure is a fine aggregate, such as martensite or tempered martensite. Additional grain refinement usually results from two or more cycles and most steels hardenable by heat treatment become ultrafine grained and hence exhibit increased strength and toughness. Rapid austenitizing can also be applied, particularly to high-carbon steels, to develop a unique microstructure comprised of a uniform dispersion of very small carbide particles in an ultrafine grained martensitic matrix.

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References

  1. 1.
    N. J. Petch:J. Iron Steel Inst., 1953, vol. 174, p. 25.Google Scholar
  2. 2.
    R. A. Grange:Trans. ASM, 1966, vol. 59, p. 26.Google Scholar
  3. 3.
    R. A. Grange and E. R. Shackelford: Method of Producing Ultrafine Grained Steel, U.S. Pat. 3,178,324, 1965; assigned to U.S. Steel Corp.Google Scholar
  4. 4.
    R. A. Grange: Method of Hardening Hypereutectoid Steels, U.S. Pat. 3,337,376, 1967; assigned to U.S. Steel Corp.Google Scholar
  5. 5.
    G. R. Speich and A. Szirmae:Trans. TMS-AIME, 1969, vol. 245, p. 1063.Google Scholar
  6. 6.
    R. C. Glenn and W. C. Leslie: Edgar C. Bain Laboratory for Fundamental Research U.S. Steel Corporation, Monroeville, Pa., private communication, 1969.Google Scholar
  7. 7.
    J. M. Wallbridge and J. Gordon Parr:J. Iron Steel Inst., 1967, vo. 205, p. 750.Google Scholar
  8. 8.
    L. F. Porter, S. J. Manganello, D. S. Dabkowski, and J. H. Gross:Metals Engineering Quart., August 1966, p. 17.Google Scholar

Copyright information

© The Metallurgical Society of American Institute of Mining 1971

Authors and Affiliations

  • R. A. Grange
    • 1
  1. 1.Edgar C. Bain Laboratory for Fundamental ResearchU.S. Steel Corp.Monroeville

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