Title: Steel superstrengthening phenomenon, part I

Authors: N.I. Kobasko

Addresses: Intensive Technologies Ltd, Kyiv, Ukraine IQ Technologies, Inc., Akron, USA

Abstract: The phenomenon of superstrengthening of metals was for the first time discovered in Kobasko (1967) and discussed many times in scientific literature (Kobasko, 1992, 1979, 1980; Ganiev et al., 1980). It lies in the following: very intensive cooling within the martensite range results in additional strengthening (superstrengthening) of material with simultaneous improvement of its plastic properties. There is also a different point of view (Gul et al., 1989; Sverdlin et al., 2003), according to which very intensive cooling within the range higher the martensite start temperature Ms results in additional strengthening of metals due to |freezing of vacancies|, formed during heating. The author has shown that intensive cooling higher Ms does not result in superstrengthening of material and only very intensive cooling within the range of Ms/Mf yields positive results. It is of great practical and scientific interest to discuss this information widely and apply it in production.

Keywords: intensive quenching; dislocations density; additional strengthening; steel superstrengthening; improved plastic properties; service life; new methods; intensive cooling.

DOI: 10.1504/IJMPT.2005.007961

International Journal of Materials and Product Technology, 2005 Vol.24 No.1/2/3/4, pp.361 - 374

Published online: 06 Oct 2005 *

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