Method for producing a component from an air-hardenable steel and component produced therewith

US8404061B2 · kind B2 · utility

Assignee

• Salzgitter Flachstahl GmbH · DE

Inventors

• Michael Braun · Altensteig, DE
• Uwe Eggers · Bitterfeld-Wolfen, DE
• Cord Schäffner · Hannover, DE
• Joachim Schöttler · Braunschweig, DE
• Friedrich Luther · Gehrden, DE
• Stefan Mütze · Hannover, DE
• Manuel Otto · Lehre, DE
• Thorsten Reier · Hemmoor, DE

Key dates

• Filing date: Jun 21, 2010
• Grant date: Mar 26, 2013
• Expiry date: Jun 21, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12229
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A component of an air-hardenable steel composed of (contents in mass %): C<0.20; Al<0.08; Si<1.00; Mn 1.20 to <2.50; P<0.020; S<0.015; N<0.0150; Cr 0.30 to <1.5; Mo 0.10 to <0.80; Ti 0.010 to <0.050; V 0.03 to <0.20; B 0.0015 to <0.0060, with the remainder being iron including the usual elements present in steel, is produced by heating a hot- or cold-rolled steel sheet or steel tube section to a temperature of θblank=800 to 1050° C. and then forming the sheet or tube into a component in a forming tool. After removal from the tool, the component is cooled down in air while the component still has a temperature above θremoval=200° C. and below 800° C. The component achieves the required mechanical properties during air-cooling.