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:
Jul. 12, 2011
Filed:
Aug. 13, 2007
Hiroyuki Otsuka, Yokohama, JP;
Koshiro Yamane, Yokohama, JP;
Satoshi Terasaki, Okegawa, JP;
Mark Schlichting, Crawfordsville, IN (US);
Rama Ballav Mahapatra, Brighton-Le-Sands, AU;
David J. Sosinsky, Carmel, IN (US);
Hiroyuki Otsuka, Yokohama, JP;
Koshiro Yamane, Yokohama, JP;
Satoshi Terasaki, Okegawa, JP;
Mark Schlichting, Crawfordsville, IN (US);
Rama Ballav Mahapatra, Brighton-Le-Sands, AU;
David J. Sosinsky, Carmel, IN (US);
Nucor Corporation, Charlotte, NC (US);
Abstract
A thin cast steel strip and method of making thereof with improved resistance to microcracking, where the steel strip is produced by continuous casting and contains a carbon content between about 0.010% and about 0.065% by weight, less than 5.0% by weight chromium, at least 70 ppm of total oxygen and between 20 and 70 ppm of free oxygen, and manganese to sulfur ratio greater than about 250. The carbon content in the cast strip may be below about 0.035%, less than 0.005% by weight titanium, and the average manganese to silicon ratio in the strip produced may be greater than 3.5. The carbon content may be less than 0.035%, the casting speed less than 76.68 meters per minute, and the tundish temperature of the molten metal is maintained below 1612° C. (2933.7° F.).