Abstract: The invention relates principally to a welded steel part with a very high mechanical strength characteristics obtained by heating followed by hot forming, then cooling of at least one welded blank obtained by butt welding of at least one first and one second sheet consisting at least in part of a steel substrate and a pre-coating which is constituted by an intermetallic alloy layer in contact with the steel substrate, topped by a metal alloy layer of aluminum or aluminum-based alloy.

Abstract: A bubble pump is provided. The bubble pump has an interior formed from a material that is resistant to attack by molten aluminum. The interior surface may be formed from a ceramic. The ceramic may be selected from the following: alumina, magnesia, silicate, silicon carbide, or graphite, and the mixtures thereof. The ceramic may be a carbon-free, 85% Al2O3 phosphate bonded castable refractory.

Abstract: The present invention provides an aqueous treatment solution containing sulfate ions SO42? in a concentration greater than or equal to 0.01 mol/l, to treat sheet metal including a steel substrate coated on at least one face with a coating including at least zinc and magnesium to reduce blackening or tarnishing of the sheet metal during storage. The present invention also provides a sheet metal treated with a solution of this type.

Abstract: A method of making a high strength head-hardened crane rail and the crane rail produced by the method. The method comprises the steps of providing a steel rail having a composition comprising, in weight percent: C 0.79-1.00%; Mn 0.40-1.00; Si 0.30-1.00; Cr 0.20-1.00; V 0.05-0.35; Ti 0.01-0.035; N 0.002 to 0.0150; and the remainder being predominantly iron. The steel rail is cooled from a temperature between about 700 and 800° C. at a cooling rate having an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 800° C.), (40 s, 700° C.), and (140 s, 600° C.) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 700° C.), (40 s, 600° C.), and (140 s, 500° C.).

Abstract: A cold rolled and hot dip coated steel sheet presenting a tensile strength above 1000?50×Al MPa, a uniform elongation above 15% and a low density is provided. The steel includes, by weight percent: 0.1?C?0.5%, 3.5?Mn?10.0%, 0?Al?9.0%, Si?5.0%, Ti?0.2%, V?0.2%, Nb?0.2%, S?0.004%, P?0.025%, 0.5?Si+Al?9.0%, B?0.0035, Cr?1%, The balance being Fe and impurities and the microstructure containing 25% to 90% of ferrite, 10% to 50% of austenite, kappa precipitates lower than 5% and martensite lower than 25%. The steel is able to be coated using total oxidation.

Abstract: A hot-dip-coated, non-skin-passed, cold-rolled metal strip is provided. The metal coating of the metal strip includes a waviness Wa0.8 of less than or equal to 0.70 ?m. Metal parts are also provided.

Abstract: The present invention provides a method for the fabrication of a steel sheet with a completely martensitic structure which has an average lath size of less than 1 micrometer and an average elongation factor of the laths is between 2 and 5. The elongation factor of a lath is defined as a maximum dimension 1max divided by and a minimum dimension 1max. The steel sheet has a yield stress greater than 1300 MPa and a mechanical strength greater than (3220(C)+958) megapascals. A composition of a semi-finished steel product includes, expressed in percent by weight, is, 0.15%?C?0.40%, 1.5%?Mn?3%, 0.005%?Si?2%, 0.005%?Al?0.1%, 1.8%?Cr?4%, 0%?Mo?2%, whereby: 2.7%?0.5 (Mn)+(Cr)+3(Mo)?5.7%, S?0.05%, P?0.1%, optionally: 0%?Nb?0.050%, 0.01%?Ti?0.1%, 0.0005%?B?0.005%, 0.0005%?Ca?0.005%. The semi-finished product is reheated to a temperature T1 in the range between 1050° C. and 1250° C., then subjected to a roughing rolling at a temperature T2 in the range between 1000 and 880° C.

Abstract: A method for producing a metal sheet is provided. The method includes providing a steel substrate having two faces, depositing a metal coating on each face by dipping the substrate in a bath, cooling the metal coatings, altering layers of magnesium oxide or magnesium hydroxide formed on the outer surfaces of the metal coatings, and depositing a layer of oil on the outer surfaces of the metal coatings.

Abstract: A rolled steel sheet suitable for enameling, having a carbon profile, defined by a gradient in the C-level from a level Csurface at at least one surface of the sheet, to a level Cbulk in the bulk of the sheet, Cbulk being higher than Csurface, and with Cbulk higher than 0 and lower than 0.08 wt %, Csurface between 0 and 0.015 wt %, Al between 0.012 wt % and 0.07 wt %, Mn between 0.12 wt % and 0.45 wt % and O lower than 0.01 wt % and wherein the depth where the C-level reaches (Cbulk+Csurface)/2, is higher than 75 ?m.

Abstract: This invention relates to a steel sheet provided with a sacrificial cathodic protection layer comprising from 5 to 50% zinc by weight, from 0.1 to 15% silicon by weight and optionally up to 10% magnesium by weight and up to 0.3% by weight, in cumulative content, of additional elements, and also comprising a protection elements to be selected from among tin in a percentage by weight between 0.1 and 5%, indium in a percentage by weight between 0.01 and 0.5% and combinations thereof, the balance consisting of aluminum and residual elements or unavoidable impurities. The invention further relates to a method for the fabrication of parts by hot or cold stamping and the parts that can be thereby obtained.

Abstract: A method and device for measuring the thickness of a coating material layer of a running strip according to which, by means of an eddy current sensor for at least one area of the strip, a quantity is measured, representative of the thickness of the coating layer and the thickness of the coating layer is determined from the measured quantity and from at least one calibration value. The measurement made with an eddy current sensor comprises the measurement of the complex impedance of a coil facing the running strip for a low excitation frequency and a high excitation frequency and the elaboration of a quantity representative of the thickness of the coating layer from said complex impedance measurements. A device for applying the method and a coating installation equipped with the device.

Abstract: A manufacturing process of a hot stamped coated part comprising the following successive steps, in this order: providing a hot rolled or cold rolled steel sheet comprising a steel substrate and an aluminium-silicon alloy precoating, the precoating containing more than 50% of free aluminium and having a thickness comprised between 15 and 50 micrometers, then cutting the steel sheet to obtain a precoated steel blank, then heating the blank under non protective atmosphere up to a temperature Ti comprised between Te?10° C. and Te, Te being the eutectic or solidus temperature of the precoating, then heating the blank from the temperature Ti up to a temperature Tm comprised between 840 and 950° C. under non protective atmosphere with a heating rate V comprised between 30° C./s and 90° C.

Abstract: The present invention relates to a facility for the continuous vacuum deposition of a metal coating on a substrate in motion, comprising a vacuum deposition enclosure (24), at least one vapor jet deposition head (25,26) connected to an evaporator pot (9) designed to contain the coating metal in liquid form (11), through a vapor supply pipe (20) provided with a distribution valve (19), and a melting furnace (1) for said metal, said furnace being at atmospheric pressure, located below the lowest portion of the evaporator pot (9) and connected to the evaporator pot (9) by at least one automatic supply pipe (8) of the evaporator pot (9) provided with a supply pump (6) and by at least one liquid metal return pipe (8A,18) optionally provided with a valve (16,17), regulating means for the supply pump (6) further being present to regulate a determined liquid metal level in the evaporator pot (9), characterized in that it comprises, in each said supply and return pipes (8; 8A,18), a so-called heat valve area (7,13,15)

Abstract: The present invention provides a method for the fabrication of a martensitic steel sheet with a yield stress greater than 1300 MPa. The method includes the steps of obtaining a semi-finished steel product, the composition of which includes, whereby the contents are expressed in percent by weight: 0.15%?C?0.40%, 1.5%?Mn?3%, 0.005%?Si?2%, 0.005%?Al?0.1%, S?0.05%, P?0.1%, 0.025%?Nb?0.1%, and optionally: 0.01%?Ti?0.1%, 0%?Cr?4%, 0%?Mo?2%, 0.0005%?B?0.005%, 0.0005%?Ca?0.005%. The remainder of the composition is iron and the inevitable impurities resulting from processing. The semi-finished product is reheated to a temperature T1 in the range between 1050° C. and 1250° C., then the reheated semi-finished product is subjected to a roughing rolling at a temperature T2 in the range between 1050 and 1150° C.

Abstract: The invention relates essentially to a composite part comprising at least one sheet of steel coated with at least one polymeric film formed beforehand by extrusion of a polymeric blend comprising at least the following components: a polymer formed of a dispersion of elastomer nodules in a polypropylene matrix, the proportion of elastomer in the matrix being less than 20% by weight of the combination formed by the matrix and the elastomer, a first antioxidant from the family of the phenolic antioxidants for a content by weight of greater than or equal to 0.2%, a second antioxidant from the family of the hydroperoxide-decomposing antioxidants for a content by weight of greater than or equal to 0.1%, reinforcing fillers for a content by weight of less than 10%. The invention relates in addition to a process for the manufacture of this composite part and to the application of this composite part in the motor vehicle and transportation fields.

Abstract: The present invention provides a panel having a profile. The panel includes a first longitudinal edge including in succession a first longitudinal rib, a flange, and a second longitudinal rib. Each longitudinal rib includes an upper central part and two lateral wings. The panel also includes a central part and a second longitudinal edge including in succession a first lateral portion, a protruding part, and a second lateral portion. The lateral portions have a configuration permitting them to at least partially overlap the upper central parts of the first and second longitudinal ribs. The protruding part is capable of receiving a fastener. The present invention also provides an assembly of panels marginally overlapping, a roofing and a kit for fabrication of roofing.

Abstract: The present invention provides a process for manufacturing a metal strip having a metallic corrosion protection coating. The process includes making the metal strip pass through a bath of molten metal having between 2 and 8 wt. % aluminum, 0 to 5 wt. % magnesium and up to 0.3 wt. % addition elements, the balance being zinc and inevitable impurities. The bath is maintained at a temperature between 350 and 700° C. Nozzles wipe the coated metal strip spraying a gas on either side of the strip. The coating is cooled in a controlled manner until it has completely solidified. A metal strip and a metal part obtained by deformation of this strip are also provided.

Abstract: A cold-rolled sheet is provided. The cold-rolled sheet is annealed and pre-coated for the fabrication of press hardened parts, composed of a steel substrate for heat treatment with a carbon content C0 between 0.07% and 0.5%, expressed by weight, and a metal pre-coating on at least the two principal faces of the steel substrate. The substrate comprises a decarburized area on the surface of each of the two principal faces. The depth p50% of the decarburized area is between 6 and 30 micrometers, and p50% is the depth at which the carbon content is equal to 50% of the content C0. The sheet does not contain a layer of iron oxide between the substrate and the metal pre-coating. Processes are also provided.

Abstract: The present invention is directed at a method of production gain oriented Fe—Si steel sheet presenting an induction value at 800 A/m above 1.870 Tesla and a core power loss lower than 1.3 W/kg at a specific magnetic induction of 1.7 Tesla (T). The steel chemical composition comprises, in weight percentage: 2.8?Si?4, 0.20?Cu?0.6, 0.05?Mn?0.4, 0.001?Al?0.04, 0.025?C?0.05, 0.005?N?0.02, 0.005?Sn?0.03, S?0.015 and optionally Ti, Nb, V or B in a cumulated amount below 0.02, the following relationships being respected: Mn/Sn?40, 2.0?C/N?5.0, Al/N?1.20, and the balance being Fe and other inevitable impurities.

Abstract: The invention relates to a plasma source (1) for depositing a coating onto a substrate (9), which is connectable to a power source (P) and includes: an electrode (2); a magnetic assembly (4) located circumferentially relative to said electrode and including a set of magnets mutually connected by a magnetic bracket (46) including a first and second central magnet (43, 44) and at least one head magnet (45); and an electrically insulating enclosure (5) arranged such as to surround the electrode and the magnets.