Method for producing hot strips from lightweight steel

US8069904B2 · kind B2 · utility

Assignee

• SMS SIEMAG AG · DE

Inventors

• Karl-Heinz Spitzer · Clausthal-Zellerfeld, DE
• Hellfried Eichholz · Peine, DE
• Markus Schäperkötter · Braunschweig, DE
• Guido Bormann · Ilsenburg, DE

Key dates

• Filing date: Dec 14, 2005
• Grant date: Dec 6, 2011
• Expiry date: May 31, 2027

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49991
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

In a method for producing hot strips from a deformable lightweight steel which includes as main elements Fe, Mn, Si and Al, melt is cast close to its final dimension in a horizontal continuous strip casting installation under a protective gas to form a pre-strip between 6 and 20 mm, and the temperature of the pre-strip is adjusted after complete solidification and before the beginning of a hot-rolling process. The pre-strip is passed through a device under a protective gas for homogenization in concert with a selective maintenance of the temperature, cooling or heating, and subsequently subjected to a hot-rolling process having at least one pass with a total degree of deformation of at least 50%, and is then reeled as a hot strip following the cooling process. The hot-rolling process is executed in-line or in decoupled manner depending on the ratio of casting speed to rolling speed.