Abstract
As a follow-up to work done on the remelting of three grades of 300 series stainless steels on a small scale electroslag remelting unit, adjunct studies were made on the kinetics of inclusion re-solution during the “electrode stage” of remelting. The objective of this study was to attempt to quantify the metallographic observations of many investigators that vary-ing degrees of inclusion re-solution do take place during the consumable remelting of numer-ous grades of metals and alloys. In specific, the rate(s)of re-solution of the large stringer inclusions found in the 300 series air melt stock was investigated. A known and controlled temperature gradient was imposed on long cylindrical specimens for varying times and, by a metallographic inclusion sizing and counting technique described in this paper, a series of isochronal and isothermal data was generated. Plots of rates of re-solutionvs time indi-cated a zero-order reaction mechanism and the activation energy calculated from the mea-sured reaction rate constants was found to be 36,000 J/mole.
Similar content being viewed by others
References
W. E. Anable, R. H. Nafzinger, and D. C. Robinson:J. Metals, 1973, vol. 25, no. 11, pp. 55–61.
J. A. Vaccari:Mater. Eng., 1974, vol. 2, pp. 52–54.
H. Fredriksson and O. Jarleborg:J. Metals, 1971, vol. 23, no. 9, pp. 32–40.
A. Mitchell, S. Joshi, and J. Cameron:Met. Trans., 1971, vol. 2, pp. 561–67.
R. A. Entwistle: B.Sc. Thesis, Metallurgical Engineering Department, Queen’s University, Kingston, Ontario, May, 1974.
T. R. Allmand and D. S. Coleman:Metals Mater., 1971, vol. 10, pp. 325–35.
D. A. R. Kay: First International Symposium on Electroslag Remelting, Mellon Institute, Pittsburgh, 1967, vol. 2, paper 4.
R. G. Ward:An Introduction to the Physical Chemistry of Iron and Steel- making, 1st ed., p. 84, Edward Arnold Publishers Ltd., London, 1962.
J. W. Guerard: B.Sc. Thesis, Metallurgical Engineering Department, Queen’s University, Kingston, Ontario, May 1973.
T. Lauritzen, A. Wilhop, and G. P. Ferguson: U.S. A.E.C. Research and De- velopment Report, GEAP-10066, July 1969, p. 18.
Author information
Authors and Affiliations
Additional information
C. F. CHAN, J. W. GUERARD, and D. MILLER were all Seniors in the Metallurgical Engineering Department, at Queen’s University, Kingston, Ontario, when this work was done.
Rights and permissions
About this article
Cite this article
Chan, J.C.F., Guerard, J.W., Miller, D. et al. The re-solution of inclusions in remelted stainless steels. Metall Trans B 7, 135–141 (1976). https://doi.org/10.1007/BF02652830
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02652830