Steel sheet for can and manufacturing method thereof
US6221180A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1999 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Dec 7, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/009
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention provides a can steel sheet having satisfactory surface appearance and having workability, appearance property after working and high yield that can meet demands on complicated can forming, and a manufacturing process thereof. To be more specific, according to the invention, a slab having a composition containing, in weight %, C: more than 0.005% and equal to or less than 0.1%, Mn: 0.05-1.0% is subjected to hot-rolling at a finishing temperature of 800 to 1000.degree. C., to coiling at 500 to 750.degree. C., to cold-rolling, followed by continuous annealing at a recrystallization temperature or higher and 800.degree. C. or lower, and then to box annealing at a temperature higher than 500.degree. C. and equal to or lower than 600.degree. C. for 1 hr or longer. The steel sheet has preferably a structure containing ferrite as a principle phase and having a mean grain diameter of 10 .mu.m or less and further containing 0.1-1% by weight of pearlite grains each having a grain diameter of 0.5-3 .mu.m. To obtain satisfactory surface appearance, it is preferable that the steel contains: Ti: 0.015-0.10%, Al: 0.001-0.01%, and a total of 0.0005-0.01% of one or two members of Ca, R…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.