Process for manufacturing strip made of an iron-carbon-manganese alloy, and strip thus produced

US6358338B1 · kind B1 · utility

Assignee

• USINOR · FR

Inventors

• Nicolas Guelton · Metz, FR
• Michel Faral · Metz, FR
• Odile Faral · Metz, FR

Key dates

• Filing date: Jul 7, 2000
• Grant date: Mar 19, 2002
• Expiry date: Jul 7, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21D8/0273
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a process for producing strip made of an iron-carbon-manganese alloy, in which:a thin strip, having a thickness of 1.5 to 10 mm, is cast directly on a casting machine from a liquid metal of composition, in percentages by weight: C ranging between 0.001 and 1.6%; Mn ranging between 6 and 30%; Ni≦10% with (Mn+Ni) ranging between 16 and 30%; Si≦2.5%; Al≦6%; Cr≦10%; (P+Sn+Sb+As)≦0.2%; (S+Se+Te)≦0.5%; (V+Ti+Nb+B+Zr+rare earths)≦3%; (Mo+W)≦0.5%; N≦0.3%; Cu≦5%, the balance being iron and impurities resulting from the smelting;the said strip is cold rolled with a reduction ratio ranging between 10 and 90% in one or more steps; andthe said strip undergoes recrystallization annealing.The invention also relates to a strip that can be produced by this process.