Abstract: A device for regulating the thickness of a metal deposit formed on a strip emerging from a galvanization bath, comprising at least one nozzle for blowing air provided between the opposite, narrowly spaced ends of two jars. The air knife forming slot is delimited by two flat, parallel faces defining the direction of the air blade, one of these faces being provided on a deformable lip extending inside a hollow provided at the end of a first jaw and being slidable along a flat retaining face substantially perpendicular to the direction of the air knife and deforming the flat face by the action of an arrangement to adjust the width of the slot.

Abstract: An installation for rolling a flat product, comprising a support stand composed of two spaced uprights between which is placed a plurality of superposed rolls, between which a squeezing force is applied, for rolling a product (B) passing between two work rolls (A, A'). At least one of the work rolls (A) consists of a tubular jacket mounted for rotation about a stationary central shaft along which is provided a plurality of spaced bushes, isolated from one another. The work roll is associated with a feed circuit for circulating pressurized oil in order to form an oil film between each bush and the jacket. The pressure of the oil film between each bush and the corresponding zone of the jacket is individually adjusted for the application of radial forces of adjustable intensity per bush.

Abstract: Lower structure of a mould for the pressure casting of flat products such as slabs and method for mount and removing the lower spacer of this mould is provided. The lower structure of the mould includes an intermediate beam (26) resting freely on a frame (3) whose upper surface opposite to its surface bearing on the frame (3) carries a lower spacer (4) which is fixed by clips (37) on the beam (26). At least one positioning pin (54) is engaged in a housing (55) at the front part of the frame (3). A plurality of members (47) for holding the intermediate beam (26) on the frame are distributed according to the length of the beam (26). These members each comprise a part (46) which can be engaged longitudinally in a coupling device (45) attached to the beam (26) and which can be actuated in order to hold the beam (26) on the frame (3) or, on the other hand, in order to release it.

Abstract: Flat metal products are pressure cast in a mould having two lateral walls each consisting of a support and of a graphite block as well as several spacers, including an upper spacer interposed between the blocks. The ends of the upper spacer and of the front spacer are inserted between two half-shells intended to receive a header of molten metal at the end of the cast. Elastic members carried by the supports exert during the cast, a clamping force of the half-sheels on the spacers. After the start of solidification of the slab, the clamping force is reduced by lateral jacks which eliminate any resistance to contraction of the slab and thus prevent the formation of cracks at the slab/header transition.

Abstract: A built-up ingot mold for the continuous casting of metal has four cooled plates (2, 3) delimiting between them a cavity (4). The corners of the cavity are cut by bevels (9) and each pair of opposite plates bear on corresponding bearing faces (8) of the plates (2) of the other pair of opposite plates. The plates (2, 3) can be tightened against one another by tightening devices (10) acting approximately perpendicularly to the bearing faces (8). The bevel (9) of each corner of the cavity (4) is formed by the hypotenuse of a right-angled triangle, the sides forming the right angle of which are each located in a plane formed by an inner wall of one of the adjacent plates (2, 3) and have a length greater than 30 mm.

Abstract: A direct current electric furnace for melting metal raw material, especially scrap iron, comprises two consumable electrodes separated from one another and both offset laterally on the side of the median plane P1 of the vessel turned towards the current source. At least four fixed electrodes are distributed on either side of the median plane and arranged substantially at the vertices of a regular polygon symmetrical with respect to the median plane and placed between the vertical projections of the consumable electrodes, the conductors of the electrodes placed towards the source being orientated directly towards the latter, parallel to the conductors of the consumable electrodes and the conductors of the electrodes placed on the side opposite to the source each comprising a first branch passing around the vertical projection of the corresponding consumable electrode and a second branch orientated towards the source parallel to the conductors connected to the consumable electrodes.

Abstract: Device and method for feeding molten metal for the pressure casting of metal products.The device for feeding molten metal to a mould 1 of a continuous pressure-casting installation comprises a vessel 2 equipped with a cover 7 carrying a spout 3, the said vessel resting on a frame 4 and comprising a framework 9 for supporting a ladle 10 of molten metal, means for weighing the said ladle and means 20 for raising the said framework.The casting method implementing this device is characterized in that, during the cast, when the quantity of metal in the ladle 10 is greater than a specific quantity, the ladle is held in a low position (position according to reference 32) and, when the quantity of metal becomes less than the said specific quantity, the ladle is raised (position 32') so as to hold the lower end 31 of the spout below the level of the metal contained in the ladle.

Abstract: This device (27) for suspending the upper spacer (20) is carried by a longitudinal beam (40) for clamping the walls (25) of the mould (5), each wall (25) consisting of a support frame (30) and a graphite block (31); the spacer (20) and the other spacers are clamped between the blocks (31) by the beams (40) actuated by the jacks (45), the slabs being cast between the blocks (31) and the four spacers; the device (27) comprises levers (51) which are mounted, so as to rotate, on the beam (40) and which carry screw jacks (61) connected by a bar (67) and which support the upper spacer (20); the angular position of the levers (51), controlled by a dual-action jack, determines the transverse position of the spacer (20) and the screw jacks (61), each provided with a double pivot, provide the spacer (20) with free pendular suspension. This mounting facilitates handling and maintenance operations of the mould, (5), particularly the removal of the supports (30) of the blocks (31).

Abstract: The graphite wall of a mould for casting a metallurgical product includes a holder frame, a plurality of vertically disposed graphite blocks having vertical bores therein, upper and lower fixing members for fixing each of the graphite blocks in a vertical position on the frame holder. The graphite wall also includes cooling elements for introducing a cooling fluid into the bores. The lower fixing member of each graphite block forms a collector for the cooling fluid.

Abstract: The frame of a mould comprises at least one rigid transverse structure element disposed in a zone which is substantially distant from the ends of the frame. The transverse element comprises two end parts between which are disposed support beams of the lateral moulding walls. Jacks each fixed on an end bearing part of the structure element are connected via their movable rod to the beam in zones which are distant from the longitudinal ends of the beam. The jacks make it possible to achieve both the displacement of the walls between their opening and closing positions and the clamping of the mould. Restriction of the clamping stresses is provided by the structure element. The bending moment of the beams remains low since the points of application of the stresses on the beams are distant from the ends of these beams and chosen as a function of the clamping conditions of the mould.

Abstract: The spacer comprises a body made from a single piece of metal of hollow form having a U-shaped transverse section. The concave part of this section faces towards the rear and the front face of the hollow body correspondiung to the base of the U forms the moulding wall of the spacer. A bent metal inner sleeve provides a free space of small thickness which has a U-shaped cross-section in which circulating water cools the moulding wall over its entire length. The space also comprises lateral parts in contact with the lateral walls of the hollow body.

Abstract: An installation for stretch-levelling strip metal, comprising, inside a stand, at least two bending units offset longitudinally and placed respectively above and below the strip carrying at least one work cylinder mounted rotatably about a transverse axis. The frame of at least one upper bending unit is mounted rotatably on two aligned journals about which the entire bending unit can rotate between a working position in which the work cylinder points downwards, and an inverted position in which the work cylinder points upwards and can thus easily be maintained or replaced.

Abstract: Device for setting of the position of the cylinders of a rolling mill whose gripping is regulated by hydraulic jacks. The device essentially comprises a tubular sleeve which surrounds a measuring rod, making no contact therewith, and moves in the same manner as the latter, being fixed to one of the elements of the hydraulic jack for gripping the cylinders of rolling mills, and sliding in an aperture pierced in the other element of the jack.

Abstract: A method and apparatus for extruding metal using the reverse method in which a billet placed in the bore of a container is compressed between a base and an extruding block. Billets are extruded in the raw state without prior removal of the outer layer, leaving a play sufficient to form a sleeve of a thickness at least equal to that of the outer layer to be removed, between the periphery of the block and the inner face of the bore, along the inner face. The bore is then scraped, using a scraping block whose periphery is separated from the inner face of the bore by a play which is less than the thickness of the sleeve but sufficient for the sleeve to be removed over a part only of its thickness.

Abstract: The pivoting device for ladles used in continuous casting comprises at least one arm extended overhanging from a rotary barrel and comprised of a parallelogram-shaped deformable and articulated assembly comprising two supporting uprights connected to the barrel by parallel rods hinged to the uprights about upper and lower movable pins, and to the barrel (2) about upper and lower fixed pins. The uprights form an outer side movable vertically while remaining parallel to itself by deformation of the parallelogram under the action of at least one lifting jack. The articulations defining the movable pin of the upper rods are provided on a transverse frame extended horizontally and passing outside the ladle between the latter and the barrel, and the two supporting uprights are secured to the transverse frame and form with the latter a rigid fork-shaped seat wherein the ladle is nested.

Abstract: The invention relates to a converter comprising a vessel (1) resting on two supports (2) by means of two rotational bearing members (3) located diametrically opposite to each other and centered on the same tilting axis (15).According to the invention, the two bearing members of the vessel (1) consist respectively of two collars (3, 3') with a fairly large diameter, which bear against rollers (5) and which form an integral part of the vessel (1), each collar (3, 3') being fixed directly onto the side wall of the vessel along its internal edge (31); the diameter of the collar (3) being determined so that a connection over a sufficient length is ensured.The invention relates especially to the manufacture of steel.

Abstract: The invention relates to a process for preparing metal billets from bars (5) and to an installation comprising a heating furnace (2), means (10) for advancing the bars (5, 51) one behind the other along a straight path through the furnace (2), and hot shears (3) defining a shearing plane (Q) placed after the exit of the furnace (2).

Abstract: A rolling mill with axially shiftable rolls, comprising, inside a supporting stand, at least two working rolls with bending jacks bearing in the direction of the bending force on a T-shaped sliding piece comprising a part forming a foot engaging into a housing machined in the block containing the bending jacks, to allow guidance in a translational movement in the vertical plane, and the chocks of the working rolls bearing on the pieces and thereby receiving the bending force can also shift on the pieces by sliding when the rolls are to be shifted axially.

Abstract: A process and machine for the continuous casting of thin steel products, in which the inner casting space (13) of the mold (1) is given a substantially spindle-shaped cross-section which forms a central part (17) of large thickness (L), making it possible to introduce a jet of molten metal under normal conditions, and having on its sides (18) a small thickness (1) corresponding to that of the product to be produced (53). In a thickness-reducing stand (2) directly at the exit of the mold (1), the central part (17) of the product is progressively flattened to a thickness (1) equal to that of the sides.

Abstract: A mill roll with a deformable casing comprises a tubular casing (1), a fixed support (2) and a set of elements (3) for holding the casing in the radial directions. At least one chamber (9) fed with high-pressure fluid is formed between the fixed support (2) and each of the holding elements (3). The end of the holding elements (3) is separated from the inner surface of the casing (1) by means of a fluid film occupying a zone (12) in the form of a sector of a ring. The zone (12) is in communication, at one of its ends, with a low-pressure fluid feed duct (14) and, at its other end, with a fluid recovery duct (15). This results in the formation of a hydrodynamic bearing during the rotation of the casing (1), which is fed completely independently of the high-pressure supply to the chamber (9).