Method for producing packaging steel

US9650692B2 · kind B2 · utility

Assignee

• thyssenkrupp Rasselstein GmbH · DE

Inventors

• Anika Szesni · Kettig, DE
• Helmut Oberhoffer · Annweiler am Trifels, DE
• Martin Schlupp · Rheinbrohl, DE
• Dirk Matusch · Neuwied, DE
• Reiner Sauer · Neuwied, DE

Key dates

• Filing date: Nov 30, 2012
• Grant date: May 16, 2017
• Expiry date: Oct 20, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12972
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a method for producing packaging steel consisting of a cold-rolled steel sheet made of unalloyed or low-alloy steel having a carbon content of less than 0.1%. In order to provide high-strength packaging steel that has good formability and high corrosion resistance and can be produced in as energy-saving a manner as possible, the steel sheet according to the invention is first coated with a metallic coating and then annealed in a recrystallizing manner at a heating rate of more than 75 K/s and preferably more than 100 K/s to temperatures of more than 700° C., such that the metallic coating melts. The coated and annealed steel sheet is then quenched to normal temperature at a cooling rate of at least 100 K/s.