Method of producing high-strength steel plates with excellent ductility and plates thus produced

US9732404B2 · kind B2 · utility

Assignee

• Arcelormittal France · FR

Inventors

• Patrick Barges · Rozérieulles, FR
• Colin Scott · Metz, FR
• Gerard Petitgand · Plesnois, FR
• Fabien Perrard · Metz, FR

Key dates

• Filing date: Jul 7, 2006
• Grant date: Aug 15, 2017
• Expiry date: Nov 8, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C38/14
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Steel sheet, the composition of the steel of which comprises, the contents being expressed by weight: 0.08%≦C≦0.23%, 1%≦Mn≦2%, 1≦Si≦2%, Al≦0.030%, 0.1%≦V≦0.25%, Ti≦0.010%, S≦0.015%, P≦0.1%, 0.004%≦N≦0.012%, and, optionally, one or more elements chosen from: Nb≦0.1%, Mo≦0.5%, Cr≦0.3%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting.