Method and device for the continuous creation of a bainite structure in a carbon steel, particularly in a strip steel

US8652396B2 · kind B2 · utility

Assignees

• C.D. Waelzholz GmbH · DE
• EBNER Industrieofenbau GmbH · AT

Inventors

• Werner Kaiser · Ruppach-Goldhausen, DE
• Heinz Hoefinghoff · Breckerfeld, DE
• Hans-Toni Junius · Iserlohn, DE
• Michael Hellmann · Mount Sinai, US
• Peter Ebner · Leonding, AT
• Heribert Lochner · Leonding, AT

Key dates

• Filing date: Apr 18, 2011
• Grant date: Feb 18, 2014
• Expiry date: Feb 22, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/20
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method continuously creates a bainite structure in a carbon steel, especially a strip steel by austenitizing the carbon steel; introducing the austenitized carbon steel into a bath containing a quenching agent; adjusting the carbon steel to the transformation temperature for bainite and maintaining the transformation temperature for a certain period of time; and then cooling the carbon steel. The carbon steel stays in the bath until a defined percentage of the bainite structure relative to the total structure of the carbon steel has formed. Residues of the quenching agent are removed from the surface of the carbon steel by blowing the same off when the carbon steel is discharged from the bath, and the remaining structure components of the carbon steel are then transformed into bainite in an isothermal tempering station without deflecting the carbon steel at all.