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:
Aug. 23, 2011
Filed:
Feb. 02, 2009
Walter N. Blejde, Brownsburg, IN (US);
Rama Ballav Mahapatra, Brighton-le-Sands, AU;
James Geoffrey Williams, Balgownie, AU;
Frank Barbaro, Thirroul, AU;
Philip John Renwick, Horsley, AU;
Harold Roland Kaul, Mt. Ousley, AU;
Andrew Phillips, Wollongong, AU;
Christopher Ronald Killmore, Wollongong, AU;
Lazar Strezov, Adamstown Heights, AU;
Walter N. Blejde, Brownsburg, IN (US);
Rama Ballav Mahapatra, Brighton-le-Sands, AU;
James Geoffrey Williams, Balgownie, AU;
Frank Barbaro, Thirroul, AU;
Philip John Renwick, Horsley, AU;
Harold Roland Kaul, Mt. Ousley, AU;
Andrew Phillips, Wollongong, AU;
Christopher Ronald Killmore, Wollongong, AU;
Lazar Strezov, Adamstown Heights, AU;
Nucor Corporation, Charlotte, NC (US);
Abstract
A steel product with a high austenite grain coarsening temperature having less than 0.4% carbon, less than 0.06% aluminium, less than 0.01% titanium, less than 0.01% niobium, and less than 0.02% vanadium by weight, and having fine oxide particles containing silicon and iron distributed through the steel microstructure having an average particle size less than 50 nanometers and may be between 5 and 30 nanometers. The steel product may have fine oxide particles distributed through the microstructure capable of restricting ferrite recrystallization for strain levels up to at least 10.0%, for temperatures up to 750° C. with holding times up to 20 minutes. The steel product may be made by continuous casting of steel strip introduced between the casting rolls to form a casting pool of molten carbon steel having a total oxygen content of at least 70 ppm usually less than 250 ppm, and a free oxygen content 20 and 60 ppm, counter rotating the casting rolls.