Iron-cobalt alloy, in particular for electromagnetic actuator mobile core and method for making same

US7128790B2 · kind B2 · utility

Assignee

• Imphy Ugine Precision · FR

Inventors

• Thierry Waeckerle · Nevers, FR
• Lucien Coutu · London, GB
• Marc Leroy · Antony, FR
• Laurent Chaput · Avallon, FR
• Herve Fraisse · La Ferté-Bernard, FR

Key dates

• Filing date: May 11, 2001
• Grant date: Oct 31, 2006
• Expiry date: Dec 28, 2021

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01F1/147
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention concerns an iron-cobalt alloy, characterised in that it comprises in weight percentages: 10 to 22% of Co; traces to 2.5% of Si; traces to 2% of Al; 0.1 to 1% of Mn; traces to 0.0100% of C; a total of O, N and S content ranging between traces and 0.0070%; a total of Si, Al, Cr, Mo, V, Mn content ranging between 1.1 and 3.5%; a total of Cr, Mo and V content ranging between traces and 3%; a total of Ta and Nb content ranging between traces and 1%; the rest being iron and impurities resulting from production; and in that: 1.23×(Al+Mo)%+0.84 (Si+Cr+V)%−0.15×(Co%−15)≦2.1 and in that 14.5×. (Al+Cr)%+12×(V+Mo)%+25×Si%≧21. The inventive alloy is useful for making electromagnetic actuator mobile cores.