Fe-Cr-Al alloy steel sheet and process for producing the same
US5405460A · kind A · utility
4Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1993 |
| Grant date | Apr 11, 1995 |
| Priority date | — |
| Expiry date | Nov 8, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12979
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention aims to prevent the occurrence of flaws in an Fe-Cr-Al alloy steel sheet, thereby improving the yield. In the present invention, a cast slab comprising an outer layer and an inner layer with the concentration of at least one element selected from Cr, Al and REM (REM being at least one element selected from the group consisting of rare earth elements including Y of lanthanoids) in the outer layer being 70% or less of that of the inner layer, is provided, heated, hot-rolled and cold-rolled to produce a steel sheet or a foil material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.