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:
Sep. 18, 1984
Filed:
Aug. 15, 1983
Debabrata Gupta, New Haven, CT (US);
John C Yarwood, Madison, CT (US);
Olin Corporation, New Haven, CT (US);
Abstract
The present invention relates to either a batch or continuous process for decarburization of metals and metal alloys. A shallow melt of metal or metal alloy having a depth of between about 2 in. to about 24 in. is provided. The carbon content of the melt is reduced from its initial value to a range of about 0.3 to 0.1 wt. % carbon. To accomplish this reduction, an oxygen enriched gas is blown onto the surface of the melt at a velocity of about 10 to about 50% of supersonic velocity so as to decarburize the melt without creating any substantial splashing of the melt. At the same time, the melt is stirred by injecting an inert gas below the melt surface. Subsequently, the carbon content of the melt is further reduced from the carbon percentage achieved in the first reduction to a value of not less than about 0.001 wt. % carbon. This latter step is accomplished by injecting a gas mixture comprising an oxygen enriched gas and an inert gas having a ratio of between about 4:1 oxygen enriched gas to inert gas to about 1:10 oxygen enriched gas to inert gas below the surface of the melt for both decarburizing and stirring the melt.