Method of manufacturing T-3 grade low temper black plates
US4561909A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1983 |
| Grant date | Dec 31, 1985 |
| Priority date | — |
| Expiry date | Nov 14, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D8/0236
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of manufacturing T-3 grade low temper blackplates having an excellent corrosion resistance by a continuous annealing process. In this method, after a continuously cast slab of low carbon aluminum killed steel consisting of 0.02-0.09% of C, not more than 0.04% of Si, 0.15-0.40% of Mn, 0.003-0.02% of soluble Al, not more than 0.0040% in total of N and the balance of Fe and inevitable impurities is subjected to hot rolling, coiled at a temperature of less than 580.degree. C., pickled and subjected to cold rolling, the resulting cold-rolled strip is subjected to such a continuous annealing that the strip is maintained at a temperature above 680.degree. C. for at least 20 seconds, quenched up to a temperature below 500.degree. C. at a cooling rate of 10.degree.-500.degree. C./sec, maintained at a temperature of 350.degree.-500.degree. C. for at least 20 seconds and cooled to room temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.