Process for manufacturing drawable sheet by direct casting of thin strip, and sheet thus obtained
US6290787A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2000 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Jun 19, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D8/0436
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The subject for the invention is a process for manufacturing strip. The process includes casting directly from liquid metal a steel strip 1.5 to 10 mm in thickness, subjecting the cast steel strip, in the austenitic phase, to a first hot rolling operation in one or more steps at a temperature of between 950.degree. C. and the Ar.sub.3 temperature of said strip with an overall reduction ratio of at least 10%, then subjecting the hot rolled strip, in the ferritic phase, to a second hot rolling operation in one or more steps at a temperature below 850.degree. C., with an overall reduction ratio of at least 50% in the presence of a lubricant, so as to obtain a hot-rolled sheet with a thickness of less than or equal to 2 mm, and recrystallizing the hot rolled sheet at a temperature between 700 and 800.degree. C. The composition of the steel strip comprises (in weight %): carbon less than 0.1%, manganese from 0.03 to 2%, silicon from 0 to 0.5%, phosphorus from 0 to 0.1%, boron from 0 to 0.002%, titanium from 0 to 0.15%, balance iron and impurities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.