Disclosed are a method and a device for controlling flow of liquid zinc (2) in a zinc pot (1) for hot-dip galvanization. Under the blowing effects of an air knife above the zinc pot (1) for hot-dip galvanization onto strip steel (3), the liquid zinc (2) diffuses and flows outwards to zones (zones I, II, III and IV) comprising the left side, the right side, the front end of the zinc pot, respectively, and a zone between the strip steel (3) and a furnace snout (4), and surface dross rapidly generated on the surface of the liquid zinc (2) is driven to flow outwards to the zones (zones I, II, III and IV). On edge sides of the zones (zones I, II, III and IV), travelling magnetic field generators (71, 72, 73, 74, 75, 76, 77, 78, 712, 756) are arranged in multiple sections above the surface of the liquid zinc (2) in the zinc pot (1), so as to excite a travelling magnetic field to generate an electromagnetic driving force on the liquid zinc (2) to drive the flow of the liquid zinc (2). The flow of the liquid zinc (2) caused by the travelling magnetic field generators (71, 72, 73, 74, 75, 76, 77, 78, 712, 756) is engaged with the blowing flow of the air knife, driving the surface liquid zinc (2) in the zinc pot (1) to flow in order towards a rear end (zone V) of the zinc pot (1). The surface dross floating on the surface of the liquid zinc (2) is driven by the flowing liquid zinc (2) to flow in a controlled direction.

A method and an equipment permitting to optimally handle and support a roll made of at least an inert material and transfer the torque from a bearing to a roll or the other way around without damaging them, the roll and bearing being immersed in molten metal.

A method for setting the production schedule of a multiplicity of galvanized coils of metallic strip on a continuous galvanizing line is provided, the method including the steps of evaluating, for each possible combination of two uncoated coils, the impact of the transition from the first uncoated coil to the second uncoated coil on the quality of the galvanized coils, allocating to each possible combination of uncoated coils a weighting factor which depends on the results of the previous step and which takes into account the line constraints, computing the results of the previous step by calculating, for a number of possible schedules of the multiplicity of uncoated coils, a score which depends on the sum of the weighting factors attributed to the combinations of uncoated coils involved in the given schedule and by selecting the schedule with the optimal score.

The present invention relates to a gas wiping device for controlling the thickness of a coating layer deposited on a running metal strip plated with molten metal (1) in an industrial hot-dip installation, comprising a main nozzle unit (5) and a secondary nozzle unit (5A), to blow a wiping jet on the surface of the running strip, said main nozzle unit (5) and secondary nozzle unit (5A) being respectively provided with a main and secondary chamber (6, 6A) fed by pressurized non-oxidizing gas and with at least a main and N secondary elongated nozzle slot (7, 7A) formed in the tip of the respective main and secondary nozzle units (5, 5A), said tips comprising each an external top side (13, 13A), facing in use the downstream side of the running strip (1), and making an angle with the running strip surface, wherein the secondary nozzle unit (5A) is adjacent the main nozzle unit (5) over the external top side (13) of the main nozzle unit tip, so that the upper external surface (13A) of the secondary nozzle unit (5A) is designed to form, in use, an angle with the running strip surface comprised between 5° and 45°, wherein the thickness of the second slot opening (7A) is comprised between 1.5 and 3 times the thickness of the first slot opening (7), characterized in that the tip of the secondary nozzle unit has an external top side prolonged downstream by a first baffle plate making a first angle in use with respect to the running strip, so as to form a gas confinement region.

The invention relates to a system and a method for the hot-dip galvanization of motor-vehicle components, preferably for mass-production hot-dip galvanization of a plurality of identical or similar motor-vehicle components, in particular in batches, preferably for batch galvanization, especially preferably for high-precision hot-dip galvanization.

The present invention relates to a method for coating a component of a turbomachine in a bath, in which method, the component is partially immersed in the bath containing a coating material; the component is rotated at least intermittently around an axis of rotation, which lies outside of the bath, during the at least partial immersion; the component is at most immersed partially over and beyond the rotation.

A stabilization apparatus for stabilizing a metal strip rising from a molten metal bath along a theoretical feeding plane, comprising at least one pair of air knives, each being arranged in a mutually specular manner with respect to said plane; at least one pair of electromagnetic stabilizing devices, each being arranged in a mutually specular manner with respect to said plane; a pair of first support beams, each supporting a respective air knife; a pair of second support beams, each supporting a respective electromagnetic stabilizer device; wherein the pair of second support beams is distinct from the pair of first support beams, and wherein the first support beams are distal from the plane, while the second support beams are proximal to said plane and arranged in an innermost position with respect to the pair of first support beams.

A method for producing a press-mold-hardened part includes providing a steel strip having an aluminium-based coating; applying an inorganic, iron-containing conversion layer to the aluminium-based coating with a layer weight in relation to iron of 3-30 mg/m2; cold-rolling the steel strip to form a flexibly rolled strip with strip sections of different sheet thickness; cutting an initial sheet metal blank out of the flexibly rolled strip, with the blank having different sheet thicknesses with thinnest and thickest sheet sections; press-mold-hardening the initial sheet metal blank to form a part. Alternatively, the cold-rolling can take place before the cutting, and the application of the conversion layer can take place before or after the cutting, or, instead of the cold-rolling, at least two steel strip sections having an aluminium-based coating and different sheet thicknesses can be welded together, where the application of the conversion layer can take place before or after welding.

An equipment for the continuous hot dip-coating of a metal strip including an annealing furnace, a tank containing a liquid metal bath, a snout connecting the annealing furnace and the tank, through which the metal strip runs in a protective atmosphere and the lower part of the snout, the snout tip, is at least partly immersed in the liquid metal bath in order to define with the surface of the bath, and inside this snout, a liquid seal and a separate overflow attached/hold to the snout through fixings, the overflow including at least one tray, placed in the vicinity of the strip when entering the liquid metal bath and encompassed by the liquid seal.

The invention relates to the technical field of galvanization of iron-based or iron-containing components, especially steel-based or steel-containing components (steel components), preferably for the automotive or motor vehicle industry, but also for other industrial fields of application (for example for the construction industry, the field of general mechanical engineering, the electrical engineering industry etc.), by means of hot galvanization (hot clip galvanization). More particularly, the invention relates to a method of hot galvanization (hot dip galvanization) and to a plant for this purpose, and additionally to a flux and flux bath usable in this connection and to the respective uses thereof, and additionally also to the products obtainable by the method and/or in the plant (i.e. hot galvanized iron or steel components).