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. 11, 2018
Filed:
Jun. 04, 2014
Applicant:
Jfe Steel Corporation, Tokyo, JP;
Inventors:
Kohei Furumai, Tokyo, JP;
Norichika Aramaki, Tokyo, JP;
Yuji Miki, Tokyo, JP;
Takeshi Murai, Tokyo, JP;
Toru Inoue, Tokyo, JP;
Yukio Usui, Tokyo, JP;
Tomoharu Ishida, Tokyo, JP;
Assignee:
JFE Steel Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22C 1/06 (2006.01); C21C 7/04 (2006.01); G01N 21/67 (2006.01); C21C 7/10 (2006.01); C22C 1/02 (2006.01); G01N 21/69 (2006.01);
U.S. Cl.
CPC ...
C22C 1/06 (2013.01); C21C 7/04 (2013.01); C21C 7/10 (2013.01); C22C 1/02 (2013.01); G01N 21/67 (2013.01); G01N 21/69 (2013.01); G01N 2021/695 (2013.01);
Abstract
A method of producing a steel material includes a step of adding Ca to molten steel with an amount of Ca adjusted within a range satisfying the formula (1) below: where Ca is the amount [kg] of Ca added, y is an yield [%] of Ca, [S] is a concentration [% by mass] of S in the steel before addition of Ca, [AlO] is an amount [% by mass] of AlOin the steel before addition of Ca, and W is a weight [kg] of the molten steel.