Centre National De La Recherche Scientifique

Université De Nantes

Snecma

Aperam

Universite Paris Sud (ups)

Université Paris—sud

Thierry Baudin

Pascal Paillard

Jean-Baptiste Mottin

Thierry Waeckerle

Rémy Batonnet

Jean-François Castagne

Olivier Hubert

Alexandre Benoit

Donald Schleich

Alexandre Yann Michel Benoit

Anne-Laure Helbert

Alexandre Yann Benoit

Jean-Francois Castagne

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

Method of assembling a first thin copper part and a second thin aluminum part, each to be welded using heterogeneous welding, includes placing the ends of the parts so that they face one another and pressing the ends against one another so as to constitute a welding zone extending therebetween; and applying an aluminum alloy by way of filler metal to the welding zone using a low energy welding method in which the electric arc and the meltable filler wire are wider than the combined thickness of the parts, the parts being held so as to maintain the welding zone at the top using a fixing element including at least two rigid blocks of a conductive material whose thickness is between 1 and 2 mm, whose length is greater than that of the parts and whose width is sufficient to hold the parts, and a pressure fixing system.

Aluminium/copper heterogeneous welding

A method for hard surface deposition on aluminum metal parts of a turbine engine using MIG welding equipment which includes a pulsed current generator and pulsed filler metal wire feed, wherein the deposition is achieved using a filler metal wire whose composition is of the same nature as the composition of the aluminum alloy of the part to undergo hard surface deposition, with the pulsed metal wire feed and speed of deposition on the metal part of the turbine engine being adapted to carry out deposition without hot fissuring.

Method for welding and for hard surface deposition of metal parts made of aluminium by a MIG method with pulsed current and filler wire

Growing community of inventors

Gif sur Yvette, France

Thierry Baudin