Ferromagnetic alloy for induction cooking

US7575712B2 · kind B2 · utility

Assignee

• IMPHY Alloys · FR

Inventors

• Herve Fraisse · La Ferté-Bernard, FR
• Thierry Waeckerle · Nevers, FR
• Yves Grosbety · Villiers-sur-Marne, FR
• Lucien Coutu · London, GB

Key dates

• Filing date: Jun 1, 2004
• Grant date: Aug 18, 2009
• Expiry date: Jun 1, 2024

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01F1/14708
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention concerns a ferromagnetic alloy whereof the chemical composition comprises, in wt. %: 32.5%≦Ni≦72.5%; 5%≦Cr≦18%; 0.01%≦Mn≦4%; C≦1%; optionally one or more elements selected among Mo, V, Co, Cu, Si, W, Nb and Al, the total contents of said elements being not more than 10%, the remainder being iron and impurities resulting from preparation, the chemical composition further satisfying the following relationships: Cr−1.1Ni+23.25≦0%; 45Cr+11Ni≦1360; Ni+3Cr≧60% if Ni≧37.5; Cr≧7.5 if Ni≦37.5. The invention also concerns the use of said alloy for making heating elements for induction heated cooking appliances.