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:
Jan. 11, 1983
Filed:
Apr. 12, 1978
Applicant:
Inventors:
Alberto Praitoni, Rome, IT;
Antonio Spaccarotella, Rome, IT;
Assignee:
Centro Sperimentale Metallurgico S.p.A., Rome, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
164473 ; 164475 ;
Abstract
Steel powders are added to steel in a stream of inert gas introduced into the ladle above the casting mold, at a point near the exit of the steel from the ladle. The powders are thus entrained in the metal entering the mold and dissolve therein. The lance that injects the powders may also plug the ladle outlet. The powders can be used not only to perform their cooling function but also to introduce alloying elements.