Method for producing a steel component which is shaped by hot-forming a steel sheet which has a metal coating, such a steel sheet, and a steel component produced from said steel sheet by means of a hot-forming process

US10323292B2 · kind B2 · utility

Assignees

• ThyssenKrupp Steel Europe AG · DE
• thyssenkrupp AG · DE

Inventors

• Bernd Schuhmacher · Dortmund, DE
• Christian Schwerdt · Duisburg, DE
• Axel Schrooten · Dortmund, DE
• Ralf Bause · Dortmund, DE

Key dates

• Filing date: Apr 29, 2015
• Grant date: Jun 18, 2019
• Expiry date: Dec 16, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25D13/20
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A process for producing a three-dimensionally shaped steel component from a steel sheet with a metallic coating may involve hot forming the steel sheet into the steel component. The metallic coating may involve an Fe—Al-based alloy. To protect the steel sheet or the steel component against scale formation, the Fe—Al-based alloy may be applied directly to the steel sheet by galvanic coating and/or physical vapor deposition. The coating produced in this way may contain 30-60% by weight Fe, a balance of Al, and, in some cases, 0.1-10% by weight Mg, 0.1-5% by weight Ti, 0.1-10% by weight Si, 0.1-10% by weight Li, and/or 0.1-10% by weight Ca. Before heating the coated steel sheet as part of the hot forming process, the coated steel sheet may have an Fe—Al phase is stable to above 900° C.