Imphy Alloys

Imphy Ugine Precision

Alinox Ag

Yves Grosbety

Thierry Waeckerle

Lucien Coutu

Laurent Chaput

Markus Spring

Herve Fraisse

Norbert Hoffstaedter

Marc Leroy

Hervé Fraisse

The invention concerns a ferromagnetic alloy whereof the chemical composition comprises, in wt. %: 32.5%&#x2266;Ni&#x2266;72.5%; 5%&#x2266;Cr&#x2266;18%; 0.01%&#x2266;Mn&#x2266;4%; C&#x2266;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&#x2212;1.1Ni+23.25&#x2266;0%; 45Cr+11Ni&#x2266;1360; Ni+3Cr&#x2267;60% if Ni&#x2267;37.5; Cr&#x2267;7.5 if Ni&#x2266;37.5. The invention also concerns the use of said alloy for making heating elements for induction heated cooking appliances.

Ferromagnetic alloy for induction cooking

The invention relates to a cooking vessel comprising a base made of a multilayer material and a side wall, the said multilayer material comprising, in succession from the outside of the vessel to the inside of the vessel: an outer part, having a thickness e, consisting of a layer of a ferromagnetic Nickel based alloy having a Curie temperature of between 30 and 350&#xb0; C. and a thermal expansion coefficient of greater than or equal to 6.5.10K, and a core, having a thickness e, comprising at least one layer selected among aluminium, aluminium alloy and copper.

Cooking vessel comprising a base made of a multilayer material and a side wall, and article of multilayer material

Cooking vessel intended to be induction heated, comprising a heating part made of a ferromagnetic alloy having a Curie temperature of between 150&deg; C. and 370&deg; C. and a magnetostriction coefficient &lgr;,&lE;5&times;10,in absolute value. FeNiCuX ferromagnetic alloy for the manufacture of the cooking vessel, the chemical composition of which comprises from 50% to 85% of Ni, less than 50% of Cu, less than 12% of X&equals;Cr&plus;Mo&plus;Mn&plus;Si&plus;Al&plus;W&plus;Nb&plus;V&plus;Ti, the balance being iron and impurities; the composition satisfies the relationships (35/25)&times;(75&minus;Ni)&lE;Cu&lE;(50/35)&times;(85&minus;Ni) and (7/20)&times;(Ni&minus;65)&lE;X&lE;(12/35)&times;(Ni&minus;50). Production method and method of use.

Cooking vessel for induction heating and alloy and method for producing such a vessel

Growing community of inventors

Noisy Le Grand, France

Yves Grosbety