Method for making hot strips of lightweight construction steel

US7806165B2 · kind B2 · utility

Assignees

• Salzgitter Flachstahl GmbH · DE
• Max-Planck-Institut für Eisenforschung GmbH · DE

Inventors

• Joachim Kroos · Meine, DE
• Karl-Heinz Spitzer · Clausthal-Zellerfeld, DE
• Georg Frommeyer · Erkrath, DE
• Volker Flaxa · Salzgitter, DE
• Udo Brüx · Meerbusch, DE
• Klaus Brockmeier · Duisburg, DE

Key dates

• Filing date: Dec 22, 2004
• Grant date: Oct 5, 2010
• Expiry date: Sep 21, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21D8/0426
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In a method for making hot strips, a workable lightweight construction steel is used which in particular can easily be deep-drawn cold and includes the main elements Si, Al and Mn, with high tensile strength and good TRIP and/or TWIP characteristics. The mass % are as follows for C 0.04 to <1.0, Al 0.05 to <4.0, SI 0.05 to ≦6.0; Mn 9.0 to ≦30.0, the remainder being iron with the common incidental steel elements. The melt is cast in a horizontal strip casting unit, close to the final dimensions at calm flow and without bending to form a pre-strip in the range between 6 and 15 mm, and subsequently is fed for further processing.