Method of producing can steel strip
US6171416A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1999 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Oct 26, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2221/01
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
At least both ends of a sheet bar in the length direction, which is obtained by roughly rolling a steel slab including 0.1 wt % or less of C, 0.5 wt % or less of Si, 1.0 wt % or less of Mn, 0.1 wt % or less of P, 0.05 wt % or less of S, 0.20 wt % or less of Al, and 0.015 wt % or less of N, are heated so that the temperature at both ends of the sheet bar in the length direction is 15.degree. C. or more higher than the temperature of the remainder of the sheet bar. The rolling finish temperature is Ar.sub.3 +20.degree. C. to Ar.sub.3 +100.degree. C. in both end portions of the sheet bar in the length direction, and Ar.sub.3 +10.degree. C. to Ar.sub.3 +60.degree. C. in the remainder, and the rolling finish temperature in the both end portions in the length direction is 10.degree. C. or more higher than that of the remainder, so that a steel strip after cold rolling and annealing has r values within .+-.0.3 of the average r value, and .DELTA.r within .+-.0.2 of the average .DELTA.r in the region of 95% or more of each of the total length and total width of the steel strip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.