Method for increasing mechanical properties in ductile iron by a

Details Method for increasing mechanical properties in ductile iron by a Method for increasing mechanical properties in ductile iron by a

1981-04-08

1982-12-14

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75 53, 75 58, 75130A, C21C 702

Patent

active

043636616

ABSTRACT:
A method is disclosed of making as-cast ductile iron wherein an iron melt having a chemistry capable of forming gray iron having flake graphite is treated with a nodularizing agent and solidified to provide a microstructure consisting substantially of a pearlite matrix containing uniformly distributed graphite nodules surrounded by ferrite. The iron melt is alloyed with: (a) at least one of 0.02-0.06% Sb and 0.02-0.08% Sn, (b) 0.001-0.0015% each of Ce and La, and (c) 0.5-1.0% Mn.

REFERENCES:
patent: 3492118 (1970-01-01), MicKelson
patent: 3527597 (1970-09-01), Dawson
patent: 3663212 (1972-05-01), Heine
patent: 3798027 (1974-03-01), DeFranco
patent: 3997338 (1970-12-01), Van Eeghem
Grigorovich, V. K., Russian Casting Production, vol. 12, pp. 557-561, (1963).

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