Compacted graphite cast irons in the iron-carbon-aluminum system

Details Compacted graphite cast irons in the iron-carbon-aluminum system Compacted graphite cast irons in the iron-carbon-aluminum system

1983-10-27

1985-02-26

Rutledge, L. Dewayne

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75130A, 75130R, 75123CB, 148 35, C22C 3308

Patent

active

045016127

ABSTRACT:
A process for the production of a compacted graphite cast iron which is substantially free of carbides in castings as thin as 0.15 inches, and with nodularities of less than 20% by volume without postinoculation, which comprises adding aluminum to a compacted graphite cast iron, such that the compacted graphite cast iron consists essentially of about 0.5 to 7% by weight aluminum, about 2.5 to 4% carbon, 0 to about 1.5% silicon, with the remainder iron and inevitable impurities.
The compacted graphite cast iron produced thereby is useful in the production of castings with both thick and thin sections.

REFERENCES:
patent: 1745645 (1930-02-01), Sauveur
patent: 1924344 (1933-08-01), Babinet
patent: 1944179 (1934-01-01), Homerberg
patent: 3689255 (1972-09-01), Modl
patent: 3902897 (1975-09-01), Sobue et al.
patent: 3997338 (1976-12-01), Van Eeghem et al.
patent: 4036641 (1977-07-01), Evans et al.
patent: 4246026 (1981-01-01), Stefanescu et al.
patent: 4396428 (1983-08-01), Linebarger
"CG Iron Makes a Dramatic Improvement in the Performance of Railroad Disc Brakes," Foote CGI Report No. 4.
D. M. Stefanescu, C. R. Loper, Jr., "Recent Progress in the Compacted/Vermicular Graphite Cast Iron Field," Giesserei-Praxis, No. 5, 1981.

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