Abstract: A ladle for casting molten metal comprising an inner nozzle forming a casting channel and a ladle closing device comprising a fixed element and a moving element, the inner nozzle being surrounded by an annular cooling chamber along part of its length. The annular chamber (3) contains an annular ring (5), the interior of which communicates with a duct (6) supplying a cooling fluid, the hollow ring (5) extending into the annular chamber so as to surround the inner nozzle (12), and the wall of the ring (5) being formed with a number of orifices (7) distributed all along the ring so as to direct jets of cooling fluid on to the fixed plate (12) of the ladle cooling device around the casting hole in the plate (22).

Abstract: Apparatus for on-line degassing and filtering aluminum and its alloys, constituted by a thermally insulated container body, provided with a removable lid (2) incorporating heating means (7) for heating the metal to be processed, said container body being internally subdivided, by means of a vertical partitioning wall (11) into two chambers communicating with each other only near the bottom of the container, wherein in one of said two chambers, provided with an inlet for the liquid metal to be processed, injection means (13, 14) are provided, for injecting inert, and/or active gases, which are so located as to perform a degassing in countercurrent relatively to the entering metal stream, while at the bottom of the second chamber at least a substantially horizontal plate, or wall (12) is provided, made of a porous material, such as ceramic, graphite, or the like, which is positioned spaced apart from the bottom of the container, such to allow the metal, coming from the first chamber, to flow upwards, and pass t

Abstract: Magnetically anisotropic powder having high coercivity and containing the magnetic phase Nd.sub.2 Fe.sub.14 B is produced by melt spinning a composition of these elements to form amorphous or extremely finely crystalline particles which are hot worked to produce grains containing the above phase and having dimensions in the range of about 20 to 500 nanometers. When the hot worked body is comminuted to powder, the resultant particles are magnetically anisotropic and have appreciable coercivity at room temperature.

Abstract: A lid or cover for a ceramic enclosure is formed of a substrate of an iron-based alloy, e.g., Kovar, alternately plated and coated with electrolytic nickel and electroless nickel, with an outer gold electroplate. The alternate electroplate and electroless nickel layers render the lid highly corrosion resistant without the need for an expensive, unrecoverable buried gold layer.

Abstract: A process for improving resistance of pressure vessel shells, tubesheets, tubes, pipes, pipe fittings and machine parts to stress corrosion cracking comprising heating at least those portions of such bodies subject to danger by stress corrosion cracking to a critical elevated themperature level, cooling at least the surface portions of the metal body subject to stress corrosion cracking and then permitting such treated portions of the metal body to come to ambient temperature.

Abstract: A small, simple tool used to meter precise volumes of molten metal. It has been effectively utilized by the bullet caster to make expandable projectiles for hunting. This is accomplished by using the tool to meter a small volume of molten soft lead alloy into a bullet mould, the completing the cast with a molten lead alloy of higher strength. This creates a dual-alloy bullet with the structural strength necessary for high velocity shooting, but having a nose soft enough to effectively expand upon impact with a target.The tool consists of a long, hollow barrel with a short drop tube installed in one end. The drop tube is mounted in the nozzle end of the barrel and projects into its hollow interior. The vacant space inside the barrel adjacent to the drop tube forms a reservoir to hold molten metal. When the barrel unit is submerged into a pot of molten metal, the alloy enters the nozzle and flows up the drop tube, thereby filling the interior of the barrel.

Abstract: A device for introducing gas into a mass of molten metal from a location in the side wall of a vessel for creating a stirring action therein has a refractory body having a plurality of passageways transversely thereof, the refractory body being positioned in the safety and working refractory lining of a ladle or the like so as to communicate with the interior thereof and molten metal therein. Tubular members positioned in or communicating with the passageways extend from the refractory body and upwardly to a chilling device which in turn communicates with a gas delivery tube through which a desirable supply of gas, such as argon, is delivered under pressure for introduction into the molten metal.

Abstract: A rotary pouring nozzle comprising a stationary component having a rotatable component sealingly engaged in it for rotation relative to the stationary component, has an interlocking connection between the components inside the stationary component which retains them in their working relationship. The stationary component has a flow aperture or apertures directed laterally of the rotational axis of the rotatable component with which a nozzle outlet in the rotatable component can be moved into and out of register by rotation of the rotatable component. In one embodiment an enlarged portion of the rotatable component trapped in a complementary recessed portion of the interior of the stationary component provides the interlocked connection, and inert gas supplied by way of gas permeable ring in the stationary component provides lubrication between the components. The stationary component may have non-circular locating engagement with the vessel to which the nozzle is fitted.

Abstract: A shroud for shielding the pouring of molten metal in a neutral atmosphere from a metallurgical vessel to a center runner trumpet associated with bottom pour ingot molds or the like. The shroud is a vacuum formed fiber structure with a flat bottom and a contoured self-sealing top configured to seal against a metal ware extension from the metallurgical vessel which maintains the neutral atmosphere.

Abstract: A device for introducing stirring gas into a mass of molten metal in a container by way of an opening in the container and a pocket block having a plurality of metered passageways extending therethrough, the pocket block forming a portion of a refractory lining in said container, the plurality of passageways being defined by a plurality of metal tubes arranged in a spiral configuration in circumferentially spaced relation to one another in fixed position in the pocket block which is formed of a suitable refractory, preferably vitrified. The plurality of metal tubes communicate with the single tube which extends through the bottom of the container and communicates with a supply of gas, such as argon.

Abstract: An anisotropic rare earth magnet material is provided by a sputtering technique. The material has structural and magnetic anisotropy. Its composition is represented essentially by the following formula:(R.sub.1-a O.sub.a).sub.b M.sub.1-bwherein R means at least one of rare earth metal elements of Y and the lanthanide series of La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu or a combination of Hf and at least one of the foregoing rare earth metal elements, M denotes Co or a combination of Co and at least one of Fe, Cu, Zr, Ti, Al and B, a is not greater than 0.05 (a.ltoreq.0.05), and b ranges from 0.1 to 0.5 (b=0.1-0.5).

Abstract: Palladium alloys consisting of (a) 65 to 85% palladium, (b) 0 to 10% gold and/or 0 to 5% platinum, (c) 0.1 to 10% tin, (d) 1 to 10% gallium, (e) 1 to 12% copper, (f) 0.05 to 1.5% ruthenium and/or 0.05 to 0.7% rhenium as well as (g) 0.01 to 4% tungsten and/or 0.01 to 4% aluminum and/or 0.01 to 4% zinc are use to produce firmly seated and removable dentures. These alloys do not form oxide films when melted in air.

Abstract: To simplify manufacture of plated metal parts with high corrosion resistance especially suitable for use as sealing lids or cover elements for semiconductor packages, a substrate of Kovar, or Alloy 42, which are nickel-containing iron alloys, are electroplated with a base layer of a metal having an electromotive potential high with respect to that of the substrate, over which an intermediate layer is electroplated, which intermediate layer (16) has an electromotive potential which is low with respect to the base layer, and over that a cover layer (18) is plated which has an electromotive potential similar to that of the base layer. Suitable metals are gold-nickel-gold combinations, in which the gold layers should be over 10 microinches thick, preferably and in order to meet MIL-STD 883C, about 25 microinches thick. The intermediate layer (16), if of nickel, has an electromotive potential which is at the negative side of the electromotive series.

Abstract: A contact material for a vacuum circuit breaker consists essentially of copper as the basic component, and, as the other components, 35% by weight or below of chromium and 50% by weight or below of niobium, the total quantity of chromium and niobium in said contact material being 10% by weight and above.

Abstract: The present invention relates to a concentric multi-tube-system nozzle situated beneath the surface of the melt in a refining vessel, especially a refining vessel for converting molten pig iron into steel.The stability and life of the concentric double-tube nozzle is the most crucial factor in carrying out refining in a bottom-blown converter.In accordance with the present invention, there is provided a concentric multi-tube-system nozzle situated beneath the surface of the melt in a refining vessel, comprising:an inner tube;an outer tube positioned concentrically with respect to the inner tube and forming an annular clearance between the inner tube and the outer tube;spacers for circumferentially dividing the annular clearance; anda section defined by two adjacent spacers, the section comprising a contraction portion which is positioned essentially at the upstream side of the section. The contraction portion contributes to a uniform cooling of concentric double-tube nozzle in the circumference thereof.

Abstract: A gas-injection lance has a main tube centered on an axis and having a lower end formed adjacent the axis with a plurality of throughgoing inner orifices and an upper end to which is fed a treatment gas under pressure that pressurizes the interior of the tube therewith sufficiently that the gas exits from the lower end through the inner orifices at supersonic speed. An annular array of nozzles traversing the lower tube end around the inner orifices each have an outer end opening outside of the tube and an inner end inside the tube. Respective pressure-reducers each have one side open at the lower tube end inside the tube and another side connected to the inner end of a respective nozzle for passing gas from the interior of the tube into the nozzles with a substantial pressure reduction so that the gas exits from the outer ends of the nozzles at subsonic speed.

Abstract: A device for the manipulation of immersion lances (5) for metallurgical furnaces (9) with the aid of a freely movable vehicle, for example a charging machine (2), comprises a lance mounting (3) which can be suspended at the head of the supporting arm (1) of a charging machine (2) or the like, the mounting being supported to be rotatable about two swivel and tilting axes (4--4, 6--6) extending at right angles to each other, separate hydraulic drive mechanisms for the swiveling and tiling motions of the immersion lance (5) being arranged in the charging machine (2) or the like and being connected to the lance mounting (3) by way of linkages (13, 17). Reversing valves correspondingly coupled with one another take care of deactivating and blocking the drive mechanisms of the machine not required for the movement of the lance (5).

Abstract: A liquid cooled lance is used to blow a primary supply of oxygen at the surface of a molten steel bath to form a burning spot. a central duct in the lance delivers the primary supply of oxygen to the tip. A secondary supply of oxygen is blown from nozzles around the side of the lance to burn up CO from the burning spot and so heat the bath. Several conduits run in parallel within the lance to deliver the secondary oxygen to the nozzles. There is preferably one conduit per nozzle. The conduits may run within an annular coolant duct, and preferably comprise, at least in part, pipes in the form of a winding around the lance axis. This construction has good resistance to thermal expansion stresses.

Abstract: A nozzle or gas tuyere for injecting gaseous and/or liquid and/or powdered material into a metallic melt, for example a steel melt. The nozzle is arranged to be mounted in an opening in a wall of a melt container, for example a ladle or furnace. The nozzle comprises a body provided with a through-going channel extending through the wall. The part of the body facing the melt is provided with a stopper which closes the channel against ingress of the melt but which is removable into the melt by the pressure of the material injected into the channel. The channel is also provided with a ball which is insertable into the channel for preventing flow of melt through the nozzle when the stopper is removed into the melt.

Abstract: An apparatus and method is provided simultaneously to quench a tubular on the inside and outside surfaces during horizontal axial movement of the heated tubular into the apparatus. The apparatus comprises a generally cylindrical frame carrying two external and internal quench heads mounted 180.degree. apart on the cylindrical frame. The cylindrical frame is mounted for oscillatory motion about the axis of the frame through an angle of 180.degree.. A first heated tubular is delivered to the apparatus for simultaneous inside and outside quenching while the cylindrical frame is in a first position. Thereafter, the cylindrical frame and the first tubular is oscillated through 180.degree. to the second position where the first tubular may be withdrawn from the apparatus. In its second position, the second inside and outside quenching heads are in registry with the heating furnace so that a second tubular may be quenched while the first tubular is being withdrawn from the apparatus.