Hot-rolled steel sheet having excellent cold formability and hardenability and method for manufacturing the same
US9194017B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Mar 15, 2011 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | May 14, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/009
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Hot-rolled steel has a chemical composition containing, by mass %, C: 0.18% or more and 0.29% or less, N: 0.0050% or less, Ti: 0.002% or more and 0.05% or less, B: 0.0005% or more and 0.0050% or less, and appropriately controlled amounts of Si, Mn, P, S, Al, and a tensile strength of 500 MPa or less with a variation in tensile strength of 60 MPa or less throughout a region including the edges in the width direction of the steel sheet, and having excellent cold formability and hardenability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.