The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 17, 1989
Filed:
Jan. 19, 1989
Karl J Reifferscheid, Karben, DE;
Metallgesellschaft Aktiengesellschaft, Frankfurt am Main, DE;
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.