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. 31, 2012
Filed:
Jun. 18, 2010
Gary Mcquillis, Blytheville, AR (US);
Jerome Jenkins, Blytheville, AR (US);
Neal Ross, Blytheville, AR (US);
Dhiren Panda, Blytheville, AR (US);
David John Sosinsky, Carmel, IN (US);
Gary McQuillis, Blytheville, AR (US);
Jerome Jenkins, Blytheville, AR (US);
Neal Ross, Blytheville, AR (US);
Dhiren Panda, Blytheville, AR (US);
David John Sosinsky, Carmel, IN (US);
Nucor Corporation, Charlotte, NC (US);
Abstract
A method of making a steel with low carbon less than 0.035% by weight including steps of preparing a heat of molten steel composition in a steelmaking furnace to a tapping temperature as desired for desulfurization at a VTD, tapping open into a ladle the molten steel composition with an oxygen level between about 600 and 1120 ppm, providing slag forming compound to the ladle to form a slag cover over the molten steel composition in the ladle, transporting the molten steel to a VTD, decarburizing the molten steel composition at the VTD by drawing a vacuum of less than 650 millibars, after decarburizing, transporting the molten steel to an LMF and deoxidizing the molten steel composition, after deoxidizing, returning to the VTD to desulfurize and degas the molten steel composition, and casting the molten steel composition to form a steel with low carbon less than 0.035% by weight.