Hot-rolled stainless steel strip and method for producing the same
US5948181A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1997 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Sep 29, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D8/0278
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A hot-rolled stainless steel strip contains at least 10 wt % Cr and 1.0 wt % or less of Si, and has a controlled scale thickness of not more than 2.5 .mu.m in the surface layer. The average thickness of the Si-containing oxide layer formed in the scale/alloy substitute interface is 0.1 .mu.m or less. The hot-rolled stainless steel strip is produced by hot rolling at an elongation rate of at least 150 or hot rough rolling to form a sheet bar, descaling by spraying superhigh pressure water to the surface of the sheet bar at an impact pressure (p) of 25 kgf/cm.sup.2 or more and a flow rate density of 0.002 l/cm.sup.2 or more, and then finish rolling so that the maximum reduction ratio per pass satisfies certain disclosed criteria.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.