Abstract
Two series of Cr, Mo white cast irons were investigated by different techniques. Differential thermal analysis was carried out to determine the liquidus and eutectic temperatures. Unidirectional solidification was used to promote coarser structures easier to analyze. Furthermore, the microstructures of the sample, quenched during a slow unidirectional solidification, illustrate the behavior of the alloy during continuous cooling. The precipitates were characterized by scanning and transmission electron microscopy and microprobe analysis. The main findings are reported: (1) a correlation was found between the end of solidification and the chromium to carbon ratio; (2) the determination was made of the crystallization path; (3) in some high Cr/C ratio alloys a peritectic reaction occurs on the border of the grain giving aδ ferritic phase; (4) then this δ ferrite was found to decompose in a complex manner giving austenite and ferrite probably in a lamellar structure, then precipitates of M6C and Mo2C in the austenitic and ferritic phases, respectively; and (5) according to the kinetics of cooling, some alloys undergo martensitic and bainitic transformations.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
R.B. Gundlach:A.F.S. Transactions, 1974, vol. 82, pp. 309–16.
W. W. Cias:A.F.S. Transactions, 1974, vol. 82, pp. 317–28.
J.L. Parks:A.F.S. Transactions, 1978, vol. 86, pp. 93–102.
K.H.Z. Gahr and D. V. Doane:Metall. Trans. A, 1980, vol. 11A, pp. 613–20.
F. Maratray, A. Poulalion, and P. Rabbe: International Colloquium on Iron Alloys with High Chromium and Carbon Contents, St. Etienne, France, Bulletin du Cercle d’Etudes des Métaux, November 1973, pp. 11–54.
F. Maratray and A. Poulalion: 2nd International Colloquium on Iron Alloys with High Chromium and High Carbon Contents for Tools, Wear Parts and Rolling Mill Rolls, St. Etienne, France, November 1977.
M. Durand-Charre:Bulletin du Cercle d’Etudes des Métaux, 1981, vol. 14, pp. 1–33.
R.S. Jackson:J.I.S.I., 1970, vol. 208, pp. 153–67.
M. Durand-Charre, S. Hamar-Thibault, and F. Durand:Z. Metallkunde, 1980, vol. 71, pp. 802–08.
K. Bungardt, E. Kunze, and E. Horne:Archiv, für das Eisenhüttenwesen, 1967, vol. 38, pp. 309–20.
W. Jellinghaus:Archiv, für das Eisenhüttenwesen, 1971, vol. 42, pp. 133–42.
B.F. Campbell, S.H. Reynolds, L.W. Ballard, and K.G. Carroll:Trans. TMS-AIME, 1960, vol. 218, pp. 723–32.
D.J. Dyson and K.W. Andrews:J.I.S.I., 1964, vol. 191, pp. 325–29.
J. Heritier and J. Levy:Mémoires Scientifiques de la Revue de Métallurgie, 1976, vol. 73, pp. 523–34.
K. Kuo:J.I.S.I., 1954, vol. 176, pp. 433–41.
K. Kuo:J.I.S.I., 1955, vol. 181, pp. 128–37.
K.W. Andrews, D. J. Dyson, and S.R. Keown:Interpretation of Electron Patterns, Actam Hilger, London, 1971.
D.J. Dyson, S.R. Keown, D. Raynor, and J.A. Whiteman:Acta Met., 1966, vol. 14, pp. 867–75.
K.H. Jack:J.I.S.I., 1951, vol. 169, pp. 26–30.
W. Pisch and A. Schrader:Arch. Eisenhüttenwesen, 1958, vol. 29, pp. 715–22.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
DeMello, J.D.B., Durand-Charre, M. & Hamar-Thibault, S. Solidification and solid state transformations during cooling of chromium-molybdenum white cast irons. Metall Trans A 14, 1793–1801 (1983). https://doi.org/10.1007/BF02645549
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02645549