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:
Nov. 01, 2011
Filed:
Aug. 26, 2008
Junichi Hamada, Tokyo, JP;
Naoto Ono, Tokyo, JP;
Yoshiharu Inoue, Futtsu, JP;
Ken Kimura, Futtsu, JP;
Junichi Hamada, Tokyo, JP;
Naoto Ono, Tokyo, JP;
Yoshiharu Inoue, Futtsu, JP;
Ken Kimura, Futtsu, JP;
Abstract
The present invention provides a ferritic stainless steel sheet superior in shapeability containing, by wt %, C: 0.001 to 0.010%, Si: 0.01 to 1.0%, Mn: 0.01 to 1.0%, P: 0.01 to 0.04%, Cr: 10 to 20%, N: 0.001 to 0.020%, Nb: 0.3 to 1.0%, and Mo: 0.5 to 2.0%, wherein the total precipitates are, by wt %, 0.05 to 0.60%. A method of production of a ferritic stainless steel sheet superior in shapeability comprising producing a cold rolling material in the production process so that the Nb-based precipitates become, by vol %, 0.15% to 0.6% and have a diameter of 0.1 μm to 1 μm and/or so that the recrystallized grain size becomes 1 μm to 40 μm and the recrystallization rate becomes 10 to 90%, then cold rolling and annealing it at 1010 to 1080° C.