Nickel-plated steel sheet and process for producing battery can using the nickel-plated steel sheet
US8734961B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2010 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Jul 8, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12993
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A Ni-plated steel sheet is provided in which the occurrence of scratches at the time of forming a battery can is suppressed. Also provided is a method which includes a step where a surface of a steel sheet is plated with Ni in a Ni adhesion amount of 0.3-2 μm, a step where the Ni-plated steel sheet is heated to 600-800° C. to form an Fe−Ni diffusion layer as an outermost surface layer, and a step where the steel sheet is rolled by temper rolling so as to adjust the Fe−Ni diffusion layer so that the steel sheet has the surface roughness Ra of 0.9-2.0 μm and the surface roughness Ry of 4.0-15 μm. A Ni-plated steel sheet which includes an Fe−Ni diffusion layer as an outermost surface layer and in which the diffusion layer has the surface roughness Ra of 0.9-2.0 μm and the surface roughness Ry of 4.0-15 μm and the diffusion layer has such an Fe/Ni ratio that the Fe accounts for 20-50% in Auger analysis is subjected to drawing using a water-soluble liquid which contains water-soluble emersion as a press lubricant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.