Cold-rolled steel sheet, method for manufacturing the same, and backlight chassis
US8449699B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2009 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Jul 25, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/005
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A cold-rolled steel sheet includes, on a percent by mass basis: C: 0.0010% to 0.0030%, Si: 0.05% or less, Mn: 0.1% to 0.3%, P: 0.05% or less, S: 0.02% or less, Al: 0.02% to 0.10%, N: 0.005% or less, and Nb: 0.010% to 0.030% and the remainder composed of Fe and incidental impurities, wherein values in a rolling direction and a direction perpendicular to the rolling direction are within a range of 1.0 to 1.6, and a mean value Elm of elongations in the rolling direction, a direction at 45° with respect to the rolling direction, and the direction perpendicular to the rolling direction is 40% or more, where Elm=(ElL+2×ElD+ElC)/4 and ElL: elongation in the rolling direction, ElD: elongation in the direction at 45° with respect to the rolling direction, and ElC: elongation in the direction perpendicular to the rolling direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.