Hostname: page-component-848d4c4894-75dct Total loading time: 0 Render date: 2024-05-28T19:24:10.626Z Has data issue: false hasContentIssue false
  • English
  • Français

The Effect of Alloying Elements on the Bainiite Transformation in Ductile Iron

Published online by Cambridge University Press:  21 February 2011

Sven-Eric Stenfors
Sven-Eric Stenfors*
Affiliation:
Department of Metallurgy Royal Institute of Technology S-100 44 Stockholm, Sweden
Get access

Abstract

The formation of retained austenite in nodular cast iron by austenitizing and heat treating at 450 or 350 C has been studied by X-ray measurements and metallographic examination. It has thus been related to the detailed mechanism of the bainite transformation.

The effects of the addition of a few tenths of a percent of Mn, Cr and Mo were examined and the effect of higher contents was estimated from literature data. Already small additions increase the maximum amount of retained austenite but larger additions are needed in order to increase the time for complete transformation substantially.

A small addition of Sn which has a strong effect on the transformation to pearlite had no effect on the transformation to bainite.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 34: Symposium – Physical Metallurgy of Cast Iron , 1984 , 423
Copyright
Copyright © Materials Research Society 1985

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Oblak, J.M. and Heheman, R.F., in Transformation and Hardenability in Steels, Climax Mol. Comp., Ann Arbor 1967.Google Scholar
2. Johansson, M., Vesanen, A., Rettig, H.: Austenitisch-bainitisches Gusseisen mit Kugelgraphit als Konstruktionswerkstoff im Getriebebau Antriebstechnik 11/1976.Google Scholar
3. Röhrig, K., Zwischenstufenvergutetes Gusseisen mit Kugelgraphit, Konstruiren and Giessen 2 (1978) p. 3–6.Google Scholar
4. Swedish Institute for Metals Research Report TM 0282–1486.Google Scholar
5. Miller, R.L., A rapid X-ray method for the determination of retained austenite. Trans ASM 59 1964 (892–899).Google Scholar
6. Bierwirth, G., Die röntgenographische Bestimmung des Restaustenits in einsatzgehärteten Stählen, Materialprüfung 3 (1961) Heft 6.Google Scholar
7. Rundman, K.B., Klug, R.C., An X-ray and Metallographic study of an austempered ductile Cast Iron, AFS Transactions 82–115, p. 499–508.Google Scholar
8. Vourinen, J., On the strain hardening of austempered spheroidal graphite cast iron, Technical Research Centre of Finland, Publication 8/1981.Google Scholar
9. Dorazil, E., Zwischenstufenumwandeln von Gusseisen mit Kugelgraphit, Giesserei-Praxis Nr 18/1979, p. 355–366.Google Scholar
10. Stenfors, S.-E., Effekt av legeringsämnen på bainitomvandlingen i segjärn, Materials Center, Royal Inst. Technology, S-10044 Stockholm, TRITA-MAC-0210, Dec. 82.Google Scholar