Hostname: page-component-8448b6f56d-m8qmq Total loading time: 0 Render date: 2024-04-23T20:17:54.245Z Has data issue: false hasContentIssue false
  • English
  • Français

Graphite Inoculants For Gray Cast Iron

Published online by Cambridge University Press:  21 February 2011

C. R. Loper Jr. ,
S. Shirvani  and
T. H. Witter
C. R. Loper Jr.
Affiliation:
Professor, Department of Metallurgical and Mineral Engineering, The University of Wisconsin-Madison, Madison, WI, U.S.A.
S. Shirvani
Affiliation:
Research Assistant, Department of Metallurgical and Mineral Engineering, The University of Wisconsin-Madison, Madison, WI, U.S.A.
T. H. Witter
Affiliation:
Superior Graphite Company, Chicago, Illinois, U.S.A.
Get access

Abstract

The ability of graphitic materials to serve as inoculants during the solidification of flake graphite cast irons has been examined and related to the physical structure of these materials. Carbon dissolution in cast iron melts is reviewed relative to dissolution rates and carbon recovery obtained from a variety of materials. Maximum dissolution rates and carbon recovery are shown to be attained with high purity carbon products, where the ash present does not form a network structure as carbon enters solution, and where the sulfur content of the carbon product is low.

Successful inoculation requires that the carbon product be graphitic, or possess a high degree of graphiticity, and that the solution rate be controlled so that the substrate graphite is present in the molten iron at the time of graphite formation during solidification. The characteristics of inoculants whereby this controlled solution rate can be achieved are discussed.

Inoculation with graphitic materials is shown to be effective in flake graphite cast irons, but is not effective in spheroidal or compacted/vermicular graphite cast irons. Factors contributing to this effect are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 34: Symposium – Physical Metallurgy of Cast Iron , 1984 , 89
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. Dahlke, V.O. and Knacke, O., Arch. Eisenhuttenw. 26, 373 (1955).Google Scholar
2. Shurygin, P.M. and Kryk, V.I., Vysshikh. Uchebn.Jauedenii Chernaya Met. 6, 14 (1963).Google Scholar
3. Olsson, R.G., Koump, V. and Perzak, T.F., Trans. AIME 236, 426 (1966).Google Scholar
4. Kosaka, M. and Minowa, S., Trans. ISIJ 8, 392 (1968).CrossRefGoogle Scholar
5. Angeles, O., Geiger, G.H. and Loper, C.R. Jr., Trans. AFS 76, 629 (1968).Google Scholar
6. Coates, R.B. and Leyshon, H.J., BCIRA, 200, (March 1964).Google Scholar
7. Benecke, T., Giesserei 68, 344 (1981).Google Scholar
8. Tartera, J., AFS Intl. Cast Metals Jnl., 7 (Dec. 1980).Google Scholar
9. Merchant, H.D. and Wallace, J.F., AFS Trans. 68, 429 (1960).Google Scholar
10. Merchant, H.D., Toriello, L.J. and Wallace, J.F., AFS Trans. 69, 241 (1961).Google Scholar
11. Loper, C.R. Jr., Liu, S.L., Shirvani, S. and Witter, T., AFS Trans. 92, (1984).Google Scholar
12. Liu, S.L., Loper, C.R. Jr., and Shirvani, S., AFS Trans. 92, (1984).Google Scholar
13. Moore, A., AFS Trans. 81, 268 (1973).Google Scholar
14. Dieker, A.H., Amer. Fdryman 2, 2 (Nov. 1940).Google Scholar
15. Massari, S.C., and Lindsay, R.W., AFS Trans. 49, 953 (1941).Google Scholar
16. Lownie, H.W., AFS Trans. 54, 837 (1946).Google Scholar
17. McGrady, D.D., Langenberg, C.L., Harvey, D.J. and Womochel, H.L., AFS Trans. 68, 565 (1960).Google Scholar
18. Patterson, V.H., Lalich, M.J., AFS Trans. 86, 33 (1978).Google Scholar
19. Morton, D.O. and Bryant, M.D.B., Br. Fdryman 72, 183 (June 1979).Google Scholar
20. Bryant, M.D., Briggs, J. and Neuman, R. W., AFS Trans. 85, 617 (1977).Google Scholar
21. Goldberger, W.M., Thrower, P., Zaleski, P., The CWaracteristics and Properties of Desulco Carbons (Superior Graphite 1978).Google Scholar
22. Surden, D.J., Wilford, C.F., Br. Fdryman 69, 118 (1976).Google Scholar
23. Boyer, J.A., Metal and Alloys 10, (Jan-FeF 1939).Google Scholar
24. Loria, E.A., Shepard, H.D. and Thompson, A.P., AFS Trans. 55, 301 (1947).Google Scholar
25. Doelman, R.L., Beilke, A.A., Spaulding, A.E., Lau, W.J., AFS Trans. 88, 388 (1980).Google Scholar
26. Filkins, W.C., Stuhrke, W.F., Matter, D. and Wallace, J.F., AFS Trans. 70, 882 (1962).Google Scholar