Abstract: Austenitic stainless-steel, characterized in that the composition thereof, in weight percentages, consists of: traces?C?0.03%; 1.0%?Mn?2.0%; 0.8%?Si?2.0%%; preferentially 1.0%?Si?1.5%; traces?Al?0.06% %; traces?P?0.045%; traces?S?0.015%; 8.0%?Ni?12.0%; 17.5%?Cr?20.0%; 0.4%?Mo?0.8%; traces?Sn?0.05%; traces?Nb?0.08%; traces?V?0.15%; traces?Ti?0.08%; traces?Zr?0.08%; traces?Co?1.0%; traces?B?0.01%; traces?W+Mo?0.8%; traces?Pb?0.03%; traces?N?0.1%; traces?O?0.01%; the rest being iron and impurities resulting from the production.

Abstract: A method for creating an iridescent effect on a surface through formation of wavelets on the source can include using a pulse of laser beams sent to the surface in juxtaposed optical fields of a focusing system. A scanner scans the surface using laser beams along a series of lines that follow each other in a relative direction of travel of the part and of the scanner and a series of lines that lie in continuation of each other in a direction perpendicular to the relative direction of travel. The optical fields overlap in an overlapping area having a width that is twice the diameter of the pulse laser beam up to 2 cm. Two lines lying in continuation of each other overlap at a junction and between the two series of lines follow each other in a relative direction of travel of the part and the scanner.

Abstract: Sheet or strip of cold-rolled and annealed ferrous alloy (1), characterized in that its composition is, in weight percentages: traces?Co?40%; if Co?35%, traces?Si?1.0%; if traces?Co<35%, traces?Si?3.5%; if traces?Co<35%, Si+0.6% Al?4.5?0.1% Co; traces?Cr<10%; traces?V+W+Mo+Ni?4%; traces?Mn?4%; traces Al?3%; traces?S?0.005%; traces?P?0.007%; traces?Ni?3%; traces?Cu?0.5%; traces?Nb?0.1%; traces?Zr?0.1%; traces?Ti?0.2%; traces?N?0.01%; traces?Ca?0.01%; traces?Mg?0.01%; traces?Ta?0.01%; traces?B?0.005%; traces?O?0.01%; the remainder being iron and impurities resulting from the preparation, in that, for an induction of 1.

Abstract: The disclosed martensitic stainless steel is defined in its composition is by specified ranges of weight percentages of C; Mn; Si; ?Mn+Si; ?S; 10,000×Mn×S; P; Cr, with [Cr?10.3?80*(C+N)2]?(Mn+Ni); Ni; Mo; Mo+2W; Cu; Ti; V; Zr; Al; O; Ta; Nb; (Nb+Ta)/(C+N); Nb; N; Co; Cu+Co; Cu+Co+Ni; B; rare earths+Y; Ca; the remainder being iron and impurities resulting from processing. Its microstructure includes at least 75% martensite, at most 20% ferrite and at most 0.5% carbides, the size of the ferrite grains being between 4 and 80 ?m, preferably between 5 and 40 ?m. Also disclosed is a method of manufacturing such steel.

Abstract: A transformer core includes two stacks, each of first thickness with ?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} <001> 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, <20 W/kg at 400 Hz, producing apparent magnetostriction for maximum induction values and field directions as follows: 1.2 T<5 ppm, large side of the sample parallel to rolling direction; 1.2 T<5 ppm, large side of the sample parallel to transverse direction in the rolling plane; and 1.2 T<10 ppm, length direction parallel to intermediate direction 45° to rolling and transverse directions.

Abstract: Method for manufacturing a thin strip in a soft magnetic alloy and strip obtained A method for manufacturing a strip in a soft magnetic alloy capable of being cut out mechanically, the chemical composition of which comprises by weight: 18% ? Co ? 55% 0% ? V + W ? 3% 0% ? Cr ? 3% 0% ? Si ? 3% 0% ? Nb ? 0.5% 0% ? B ? 0.05% 0% ? C ? 0.1% 0% ? Zr + Ta ? 0.5% 0% ? Ni ? 5% 0% ? Mn ? 2% The remainder being iron and impurities resulting from the elaboration, according to which a strip obtained by hot rolling is cold-rolled in order to obtain a cold-rolled strip with a thickness of less than 0.6 mm. After cold rolling, a continuous annealing treatment is carried out by passing into a continuous oven, at a temperature comprised between the order/disorder transition temperature of the alloy and the onset temperature of ferritic/austenitic transformation of the alloy, followed by rapid cooling down to a temperature below 200° C. Strip obtained.

Abstract: A laser descaling device and process includes a first laser sending a ray to the product to be descaled, reflected rays being intercepted by sensors that send collected information into a processing unit that calculates the absorption of the ray by the surface of the product, deduces the emissivity of the oxidized surface in the direction of the reflected rays, and correlates this emissivity with reference information prerecorded inside the processing unit; a second laser sends a ray onto the surface of the product, the spots of the rays covering the entire surface to be descaled, the second laser being controlled by a control unit receiving information provided by the processing unit making it possible to determine the operating parameters to be imposed on the second laser to obtain the descaling of the surface of the product, compared with experimental results prerecorded in the control unit.

Abstract: Method for welding two stainless steel sheets of thickness (e) 0.10 to 6.0 mm and having a particular composition having: a first welding step lasting a time (t) in ms: 0.10 to 0.50 mm, t=(40×e+36)±10%; 0.51 to 1.50 mm: t=(124×e 13)±10%; 1.51 to 6.0 mm: t=(12×e+47)±10%; with clamping force (F) in daN: 0.10 to 1.50 mm: F=(250×e+90)±10%; 1.51 mm to 6.0 mm: F=(180×e+150)±10%; appling a current between the welding electrodes, of intensity between 80 and 100% the maximum permissible intensity corresponding to expulsion of molten metal; a second step with an intensity between zero and 1 kA; and a third step with an intensity of 3.5 kA to 4.5 kA, for a time of at least 755 ms.

Abstract: Disclosed is a steel composition including specified ranges of Ni; Mo; Co; Mo+Co+Si+Mn+Cu+W+V+Nb+Zr+Ta+Cr+C; Co+Mo; Ni+Co+Mo; and traces of Al; Ti; N; Si; Mn; C; S; P; B; H; O; Cr; Cu; W; Zr; Ca; Mg; Nb; V; and Ta in specified ranges; the remainder being iron and impurities. The inclusion population, as observed by image analysis over a polished surface measuring 650 mm2 if hot-formed or hot-rolled; and measuring 800 mm2 if cold-rolled, does not contain non-metallic inclusions of diameter>10 ?m, and, in the case of a hot-rolled sheet, does not contain more than four non-metallic inclusions of diameter 5-10 ?m over 100 mm2, the observation being performed by image analysis over a polished surface measuring 650 mm2.

Abstract: A method for manufacturing a martensitic stainless steel part, according to which a stainless steel sheet is prepared with the following composition: 0.005%?C?0.3%; 0.2%?Mn?2.0%; traces?Si?1.0%; traces?S?0.01%; traces?P?0.04%; 10.5%?Cr?17.0%; traces?Ni?4.0%; traces?Mo?2.0%; Mo+2×W?2.0%; traces?Cu?3%; traces?Ti?0.5%; traces?Al?0.2%; traces?O?0.04%; 0.05%?Nb?1.0%; 0.05%?Nb+Ta?1.0%; 0.25%?(Nb+Ta)/(C+N)?8; traces?V?0.3%; traces?Co?0.5%; traces?Cu+Ni+Co?5.0%; traces?Sn?0.05%; traces?B?0.1%; traces?Zr?0.5%; Ti+V+Zr?0.5%; traces?H?5 ppm; traces?N?0.2%; (Mn+Ni)?(Cr?10.3?80×[(C+N)2]); traces?Ca?0.002%; traces?rare earth and/or Y?0.06%; and the rest being iron and impurities.

Abstract: A method for manufacturing a strip in a soft magnetic alloy capable of being cut out mechanically, the chemical composition of which comprises by weight: 18%?Co?55% 0%?V+W?3% 0%?Cr?3% 0%?Si?3% 0%?Nb?0.5% 0%?B?0.05% 0%?C?0.1% 0%?Zr+Ta?0.5% 0%?Ni?5% 0%?Mn?2% The remainder being iron and impurities resulting from the elaboration, according to which a strip obtained by hot rolling is cold-rolled in order to obtain a cold-rolled strip with a thickness of less than 0.6 mm. After cold rolling, a continuous annealing treatment is carried out by passing into a continuous oven, at a temperature comprised between the order/disorder transition temperature of the alloy and the onset temperature of ferritic/austenitic transformation of the alloy, followed by rapid cooling down to a temperature below 200° C. Strip obtained.

Abstract: A rolled stainless steel object has surface with a raised and indented pattern including a random juxtaposition of at least two types of polygons. Each of the polygons has at least three sides, and is made up of substantially parallel rectilinear scratches, having a depth of from 5 to 30 ?m separated by ridge lines, the axes of which are from 0.1 to 0.3 mm from each other, and a Fourier transform spectral analysis of which, carried out on a square of at least 100 mm2, shows that they have an isotropy of at least 40% between the rolling direction and the sideways direction, and two adjacent preferred angular orientations of which scratches, from among the three main preferred angular orientations thereof, are spaced apart by a minimum of 20° and a maximum of 60°.

Abstract: Disclosed is a steel whose composition includes specified wt % of: Ni, Mo, Co, Mo+Co+Si+Mn+Cu+W+V+Nb+Zr+Y+Ta+Cr+C+Al+B+Ti+N, Ni+Co+Mo, Al, Ti, N, Si, Mn, C, S, P, B, H, O, Cr, Cu, W, Zr, Ca, Mg, Nb, V, Ta, Y, the remainder being iron and impurities resulting from production. The inclusion population, observed by image analysis on a polished surface of 650 mm2 if the steel is in the form of a hot-formed part or a hot-rolled sheet and 800 mm2 if the steel is in the form of a cold-rolled sheet, does not include non-metal inclusions of an equivalent diameter greater than 10 ?m. Also disclosed are a product created from the steel, and a manufacturing method.

Abstract: Method for welding two stainless steel sheets of thickness (e) 0.10 to 6.0 mm and having a particular composition having: a first welding step lasting a time (t) in ms: 0.10 to 0.50 mm, t=(40×e+36)±10%; 0.51 to 1.50 mm: t=(124×e 13)±10%; 1.51 to 6.0 mm: t=(12×e+47)±10%; with clamping force (F) in daN: 0.10 to 1.50 mm: F=(250×e+90)±10%; 1.51 mm to 6.0 mm: F=(180×e+150)±10%; appling a current between the welding electrodes, of intensity between 80 and 100% the maximum permissible intensity corresponding to expulsion of molten metal; a second step with an intensity between zero and 1 kA; and a third step with an intensity of 3.5 kA to 4.5 kA, for a time of at least 755 ms.

Abstract: The invention relates to an alloy based on iron comprising, by weight: 35%?Ni?37% trace amounts?Mn?0.6% trace amounts?C?0.07% trace amounts?Si?0.35% trace amounts?Cr?0.5% trace amounts?Co?0.5% trace amounts?Mo<0.5% trace amounts?S?0.0035% trace amounts?O?0.0025% 0.011%?[(3.138×Al+6×Mg+13.418×Ca)?(3.509×O+1.770×S)]?0.038% 0.0003%<Ca?0.0015% 0.0005%<Mg?0.0035% 0.0020%<Al?0.0085% the remainder being iron and residual elements resulting from the elaboration.

Abstract: A method for manufacturing a strip having a variable thickness along its length, comprising the steps: an initial strip of constant thickness is provided; homogeneous cold rolling of the initial strip along its length in order to obtain an intermediate strip of constant thickness along the rolling direction; flexible cold rolling of the intermediate strip along its length in order to obtain a variable thickness strip, having, along its length, first areas with a first thickness (e+s) and second areas with a second thickness (e), less than the first thickness (e+s), continuous annealing of the strip. The plastic deformation ratio generated, after an optional intermediate recrystallization annealing, by the homogeneous cold rolling and the flexible cold rolling steps in the first areas is greater than or equal to 30%.

Abstract: Disclosed is a basic module of a magnetic core of a wound electrical transformer. The basic module includes first and second windings placed atop one another and made of first and second materials, respectively. The first material is a crystal having a saturation magnetization?1.5 T and magnetic losses less than 20 W/kg in sine waves having a frequency of 400 Hz, for maximum induction of 1 T, and the second material is a material having an apparent saturation magnetostriction less than or equal to 5 ppm and magnetic losses less than 20 W/kg in sine waves having a frequency of 400 Hz, for maximum induction of 1 T. The cross-sections of the first winding and cross-sections of the second winding satisfy (S1/(S1+S3); S2/(S2+S4)) of the first material, having a high saturation magnetization, compared to the cross-section of both materials together, is 2%-50%.

Abstract: A method for manufacturing a martensitic stainless steel part, according to which a stainless steel sheet is prepared with the following composition: 0.005%?C?0.3%; 0.2%?Mn?2.0%; traces?Si?1.0%; traces?S?0.01%; traces?P?0.04%; 10.5%?Cr?17.0%; traces?Ni?4.0%; traces?Mo?2.0%; Mo+2×W?2.0%; traces?Cu?3%; traces?Ti?0.5%; traces?Al?0.2%; traces?O?0.04%; 0.05%?Nb?1.0%; 0.05%?Nb+Ta?1.0%; 0.25%?(Nb+Ta)/(C+N)?8; traces?V?0.3%; traces?Co?0.5%; traces?Cu+Ni+Co?5.0%; traces?Sn?0.05%; traces?B?0.1%; traces?Zr?0.5%; Ti+V+Zr?0.5%; traces?H?5 ppm; traces?N?0.2%; (Mn+Ni)?(Cr-10.3-80×[(C+N)2]); traces?Ca?0.002%; traces?rare earth and/or Y?0.06%; and the rest being iron and impurities.

Abstract: A process for surface treatment of metal substrates, including the steps of: providing a metal substrate including hydroxyl groups at its surface; bringing the metal substrate into contact with a solution of at least one organophosphorus compound to enable the reaction of the hydroxyl groups at the surface of the metal substrate with the organophosphorus compound to form a monomolecular layer over the surface and a second layer of physisorbed organophosphorus molecules at least preponderantly crystallized, the obtained treated substrate being coated with the organophosphorus compound in the form of a first monomolecular layer coating at least 15% of the surface of the substrate and in the form of a physisorbed second layer at least preponderantly crystallized. A treated metal substrate which may be obtained by the process thereof, corresponding solution and its use for treating metallic substrates to improve their tribological properties during their shaping, in particular their stamping.

Abstract: The invention concerns a welding wire intended for use in welding together parts of parts consisting of F3-36Ni alloy. The welding wire consists of an alloy comprising, in wt. %: 38.6%?Ni+Co?45.0% trace?Co?0.50% 2.25%?Ti+Nb?0.8667×(Ni+Co)?31.20% if 38.6%?Ni+Co?40.33% 2.25%?Ti+Nb?3.75% if 40.33%?Ni+Co?41.4% 0.4167×(Ni+Co)?15.0%?Ti+Nb?3.75% if 41.4%?Ni+Co?45.0% trace?Nb?0.50% 0.01%?Mn?0.30% 0.01%?Si?0.25% trace?C?0.05% trace?Cr?0.50% the rest consisting of iron and inevitable impurities resulting from production.