Aperam

Olivier Hubert

Thierry Waeckerle

Thierry Baudin

Rémy Batonnet

Anne-Laure Helbert

Sheet or strip of cold-rolled and annealed ferrous alloy (1), characterized in that its composition is, in weight percentages: traces&#x2264;Co&#x2264;40%; if Co&#x2265;35%, traces&#x2264;Si&#x2264;1.0%; if traces&#x2264;Co&#x3c;35%, traces&#x2264;Si&#x2264;3.5%; if traces&#x2264;Co&#x3c;35%, Si+0.6% Al&#x2264;4.5&#x2212;0.1% Co; traces&#x2264;Cr&#x3c;10%; traces&#x2264;V+W+Mo+Ni&#x2264;4%; traces&#x2264;Mn&#x2264;4%; traces Al&#x2264;3%; traces&#x2264;S&#x2264;0.005%; traces&#x2264;P&#x2264;0.007%; traces&#x2264;Ni&#x2264;3%; traces&#x2264;Cu&#x2264;0.5%; traces&#x2264;Nb&#x2264;0.1%; traces&#x2264;Zr&#x2264;0.1%; traces&#x2264;Ti&#x2264;0.2%; traces&#x2264;N&#x2264;0.01%; traces&#x2264;Ca&#x2264;0.01%; traces&#x2264;Mg&#x2264;0.01%; traces&#x2264;Ta&#x2264;0.01%; traces&#x2264;B&#x2264;0.005%; traces&#x2264;O&#x2264;0.01%; the remainder being iron and impurities resulting from the preparation, in that, for an induction of 1.8 T, the maximum difference (Max &#x394;&#x3bb;) between the magnetostriction deformation amplitudes &#x3bb;, measured parallel to the magnetic field (Ha) applied (&#x3bb;/H) and perpendicular to the magnetic field (Ha) applied (&#x3bb;H) on three rectangular samples (2, 3, 4) of the said sheet or strip whose long sides are respectively parallel to the direction of rolling (DL) of the said sheet or strip, parallel to the transverse direction (DT) of the said sheet or strip, and parallel to the direction forming an angle of 45&#xb0; with the said rolling direction (DL) and the said transverse direction (DT), being at most 25 ppm, and in that its recrystallization rate is 80 to 100%. Method of manufacturing such a sheet or strip, transformer magnetic core made from it and a transformer comprising it.

FeCo alloy, FeSi alloy or Fe sheet or strip and production method thereof, magnetic transformer core produced from said sheet or strip, and transformer comprising same

A transformer core includes two stacks, each of first thickness with &#x2265;1 flat parts, the cutting directions rectilinear and parallel or perpendicular to one another, the stacks facing across a gap, the flat parts made of an austenitic FeNi alloy 30-80% Ni and 10% alloying elements, with a sharp {100} &#x3c;001&#x3e; cubic texture, the cutting directions of the flat parts parallel to the rolling or transverse direction, the flat parts having magnetic losses, for a maximum induction of 1 T, &#x3c;20 W/kg at 400 Hz, producing apparent magnetostriction for maximum induction values and field directions as follows: 1.2 T&#x3c;5 ppm, large side of the sample parallel to rolling direction; 1.2 T&#x3c;5 ppm, large side of the sample parallel to transverse direction in the rolling plane; and 1.2 T&#x3c;10 ppm, length direction parallel to intermediate direction 45&#xb0; to rolling and transverse directions.

Growing community of inventors

Agnetz, France

Olivier Hubert