Method of producing nodular cast iron

Details Method of producing nodular cast iron Method of producing nodular cast iron

1989-01-19

1989-10-17

Rosenberg, Peter D.

Alloys or metallic compositions

Ferrous

1.7 percent or more carbon containing

75 58, C22C 3308

Patent

active

048745766

ABSTRACT:
In a process of producing nodular cast iron wherein molten cast iron is treated in two stages with elements for inducing a formation of a predominantly nodular graphite, the crystallization of the graphite and the dynamic properties of the casting are improved in that a rare earth metal is added to the molten cast iron in the first treating stage and magnesium metal or a magnesium-containing master alloy in an amount which is sufficient for the formation of a predominantly nodular graphite is added to the molten cast iron in the second treating stage, in which no RE metal is added to the molten cast iron. The treatment is particularly effected with sheathed wires consisting of a steel sheath around a core of treating agent powder.

REFERENCES:
patent: 2841490 (1958-07-01), Steven
patent: 3415642 (1968-12-01), Matsumoto
patent: 3467167 (1969-09-01), Mahin
patent: 3955973 (1976-05-01), Robinson
Published Lecture "Aus der Praxis des Spharogusses" (Giesserei Publ. 1953).
Article "Metallurgical Applications of the Rare Earth Metals" (1969).
"Note Technique No. 48"-Fonte a Graphite Nodulaire (no date indicated)*.
"Industrial Applications of Rare Earth Elements" based on Symposium (1981)*.
"Investigation of Mechanism of Dross Formation . . ." (1970).
Search Report issued in priority appln. (38 01 917) filed in W. Germany and listing items marked * above, as well as other publications.

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