Method of and apparatus for hot rolling a thin silicon-steel workpiece into sheet steel

US8408035B2 · kind B2 · utility

Assignee

• SMS SIEMAG AG · DE

Inventors

• Ingo Schuster · Willich, DE
• Christoph Klein · Darmstadt, DE
• Mario Sucker · Goldkronach, DE
• Heribert Neifer · Dinslaken, DE

Key dates

• Filing date: Jun 22, 2007
• Grant date: Apr 2, 2013
• Expiry date: Mar 9, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21D9/52
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a method and a system for the production of hot-rolled strip silicon-alloy steel for further processing into grain-oriented sheets, such as electrical sheets, wherein a cast product, in this case a thin slab, for example, with a maximum thickness of 120 mm, is subjected to thermal pretreatment and to a subsequent rolling process on a hot-rolling line to set a desired recrystallization state. The invention proposes an intake temperature (Tin) of the cast product (2) into the hot-rolling line (9a or 9b) of at least 1200° C., and preferably in excess of 1250° C., which should be controlled during pretreatment by adding at least one preheating stage (3) and one intensive heating stage (6) to ensure the final rolling temperature (TFR).