Process and device for producing a ferritically rolled steel strip
US6616778B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 2000 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | Jul 6, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21B2201/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A process for producing a ferritically rolled steel strip, in which liquid steel is cast in a continuous-casting machine (1) to form a slab and, utilizing the casting heat, is conveyed through a furnace device (7) undergoes preliminary rolling in a preliminary rolling device (10) and, in a final rolling device (14), is finishing-rolled to form the ferritic steel strip with a desired final thickness, in which process, in a completely continuous, an endless or a semi-endless process, the slab is rolled in the austenitic range in the preliminary rolling device (10) and, after rolling in the austenitic range, is cooled to a temperature at which the steel has a substantially ferritic structure, and the strip is rolled, in the final rolling device, at speeds which substantially correspond to the speed at which it enters the final rolling device (14) and the following thickness reduction stages, and in at least one stand of the final rolling device (14), the strip is ferritically rolled at a temperature of between 850° C. and 600° C., and after leaving the final rolling device (14), is cooled rapidly to a temperature below 500° C. in order substantially to avoid recrystallizat…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.