Imphy Ugine Precision

Laurent Chaput

Lucien Coutu

Thierry Waeckerle

Marc Leroy

Herve Fraisse

Yves Grosbety

Hervé Fraisse

An iron-cobalt alloy containing 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 of 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 of 3%; a total of Ta and Nb content ranging between traces and 1%; and the rest being iron and impurities resulting from production wherein: 1.23&#xd7;(Al+Mo) %+0.84 (Si+Cr+V) %&#x2212;0.15&#xd7;(Co %&#x2212;15)&#x2266;2.1, and 14.5&#xd7;(Al+Cr) %+12&#xd7;(V+Mo) %+25&#xd7;Si %&#x2267;21. The inventive alloy is useful for making electromagnetic actuator mobile cores.

Iron-cobalt alloy, in particular for the moving core of electromagnetic actuators

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&#xd7;(Al+Mo)%+0.84 (Si+Cr+V)%&#x2212;0.15&#xd7;(Co%&#x2212;15)&#x2266;2.1 and in that 14.5&#xd7;. (Al+Cr)%+12&#xd7;(V+Mo)%+25&#xd7;Si%&#x2267;21. The inventive alloy is useful for making electromagnetic actuator mobile cores.

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

Soft magnetic alloy of the iron-nickel type, the chemical composition of which comprises, in % by weight: 34%&lE;Ni&lE;40%; 7%&lE;Cr&lE;10%; 0.5%&lE;Co&lE;3%; 0.1%&lE;Mn&lE;1%; O&lE;0.007%; S&lE;0.002%; N&lE;0.004%; with N&plus;S&plus;O&lE;0.01%; iron and impurities 5 resulting from the production process. Use in motors especially suited for use in horology.

Soft magnetic alloy

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

Soft magnetic alloy of the iron-nickel type, the chemical composition of which comprises, by weight: 40%&lE;Ni&plus;Co&lE;65%; 0%&lE;Co&lE;7%; 2%&lE;Cr&lE;5%; 1%&lE;Ti&lE;3%; 0%&lE;Al&lE;0.5%; 0%&lE;Mn&plus;Si&lE;2%; optionally, up to 3% Mo, 2% W, 2% V, 1.5% Nb, 1% Ta and 3% Cu, the sum of the Cr, Mo, W, V, Nb, Ta and Cu contents being less than 7% and the sum of the Mo, W, V, Nb, Ta and Cu contents being less than 4%; the balance being iron and impurities, such as carbon, sulfur and phosphorus, resulting from the smelting process, the chemical composition furthermore satisfying the relationships: Cr<5&minus;0.015&times;(Ni&plus;Co&minus;52.5),, if: Ni&plus;Co&lE;52.5; Cr<5&minus;0.040&times;(Ni&plus;Co&minus;52.5),, if: Ni&plus;Co&gE;52.5; the alloy having a saturation induction Bs of greater than 0.9 tesla, a coercive field of less than 10 A/m, an electrical resistivity p of greater than 60 &mgr;&OHgr;.cm and a hardness of greater than 200 HV. Process for manufacturing the alloy and uses.

Soft magnetic alloy of the Fe-Ni-Cr-Ti type for a magnetic circuit of a high-sensitivity relay

An iron--cobalt alloy the chemical composition of which comprises, by weight: 35%.ltoreq.Co.ltoreq.55%; 0.5%.ltoreq.V.ltoreq.2.5%; 0.02%.ltoreq.Ta+2.times.Nb.ltoreq.0.2%; 0.0007%.ltoreq.B.ltoreq.0.007%; C.ltoreq.0.05%; the balance being iron and impurities resulting from the smelting operation.

Growing community of inventors

Sauvigny le Bois, France

Laurent Chaput