Method and device for manufacturing a hot rolled steel strip
US6776857B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 26, 2002 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Oct 1, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D8/0263
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention provides an effective method for mechanically removing iron oxide films formed on the surfaces of a hot rolled steel strip with a high temperature. The method comprises the steps of: maintaining a steel strip coil at a high temperature of 400° C. or more until the phase transformation is completed, after hot rolling; water-cooling the steel strip coil at a speed of at least 50° C./sec to 100° C. or less while uncoiling the coil; correcting the shape of the steel strip using a correction rolling mill; removing oxide films formed on surfaces of the shape-corrected steel strip by injecting water jets to the surface; and drying the steel strip free of oxide films and winding the steel strip. Also, the present invention provides an apparatus for carrying out this method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.