Abstract: A lance for blow-refinement in a converter comprises a primary nozzle generating a high-velocity, high-pressure primary oxygen jet, and an auxiliary nozzle generating an auxiliary oxygen jet. The auxiliary oxygen jet formed by the auxiliary nozzle has a velocity lower than the speed of sound. The auxiliary nozzle is configured so as to impede but not prevent oxygen flow therethrough. In the preferred construction, deceleration of gas-metal reaction induced by the oxygen jet.

Abstract: A method for resisting corrosion while conducting a flow of hot corrosive geothermal fluid, particularly brine, comprises flowing the fluid through fluid flow conducting elements, such as production pipe and fittings formed from a metastable beta titanium-base alloy. Preferably the element is formed of a beta and alpha titanium-base alloy formed by heating a particular composition to form a metastable beta titanium matrix and then heat treating the matrix to increase the tensile strength of the matrix by at least about 10,000 psi with a total minimum ultimate tensile strength being about 170,000 psi. The particular composition is comprised essentially of between about 2 and about 10 weight percent of one or more beta eutectoid elements selected from the group consisting of iron, manganese, chromium and cobalt, with weight percentage limits in each such individual element being respectively about 5, about 5.5, about 9 and about 4.

Abstract: A flushing arrangement for a metallurgical vessel having a metal outer shell, a bottom lined with a permanent lining, on which adjacently arranged refractory bricks are applied as working lining, and pipes inserted in recesses of the bricks at predetermined sites and having flat cross sections, through which flush gas flows. In order to provide a flushing means that is simple to produce and install and offers a great safety with regard to a melt breakthrough, a rigid supply pipe for flush gas is led through the metal outer shell, reaching into the permanent lining. To its end lying in the permanent lining, at least two, yet at most four, distributing pipes are welded. They diverge from the end of the supply pipe and pass over into straight pipe sections arranged in recesses of the bricks of the working lining. The distributing pipes that are connected to one supply pipe each enclose one brick.

Abstract: Apparatus includes a chamber with an inner and outer sidewall wherein fluxing gas inlets are provided on the inner sidewall and a space is provided between the inner and outer sidewall with a heating element and an air space between the heating element and the inner sidewall for providing uniform heating of the inner sidewall.

Abstract: A cartridge-type injection device (20) is removably seated in a passage (18) through the wall of a ladle (10) and comprises a refractory nozzle tip (21) fitted to one end of a tubular body (30), and a delivery pipe (35) for gas or a mixture of gas and a particulate material, the pipe (35) entering an outer end of the body (30) and extending therethrough into the nozzle tip (21). An insulating packing is contained by the body around the pipe (35). The pipe is movable in the bore (22) of the tip (21) for dislodging a melt-obstructing plug in the bore (22) into the melt, whereupon the device is enabled to eject the gas or mixture from the pipe into the melt.

Abstract: Wear-resistant materials and articles, wherein an amorphous material having a hardness of greater than about 1600 VHN is utilized to protect wear-susceptible portions of substrates or is itself made into a wear-resistant article. Amorphous materials having hardnesses greater than about 1600 VHN are found to have surprisingly great wear resistance and can be used to prepare wear-resistant articles. Particularly satisfactory results have been obtained with metal-metalloid systems such as W--Ru--B, Re--Mo--B, Mo--Ru--B, and Co--Nb--B materials.

Abstract: Apparatus for introducing reactive and nonreactive gases through the refractory lining of a metallurgical vessel, such as bottom injection of such gases into a BOF to improve mixed blowing efficiency. The apparatus comprises one or more refractory blocks which may be set within a metal canister. The refractory blocks have a plurality of slots each containing one or more small diameter nonreactive metal tubes for conveying gases. The refractory block may also contain means for measuring the rate of wear of the refractory blocks in the canister.

Abstract: A titanium-base alloy having good elevated temperature properties, particularly creep resistance in the 950.degree. to 1100.degree. F. temperature range. The alloy consists essentially of, in weight percent, aluminum 5.5 to 6.5, tin 2.00 to 4.00, preferably 2.25 to 3.25, zirconium 3.5 to 4.5, molybdenum 0.3 to 0.5, silicon above 0.35 to 0.55, iron less than 0.03, oxygen up to 0.14, preferably up to 0.09 and balance titanium.

Abstract: Creep resistant titanium alloys containing aluminum, zirconium, molybdenum and germanium plus optional silicon, carbon, tin and niobium.

Abstract: The present invention includes casting, e.g., such as by roll casting, or slab casting, an alloy having components in the composition range of about 0.5-1.2% iron, 0.7-1.3% manganese, and 0-0.5% silicon by weight, homogenizing the cast alloy at temperatures below about 1100.degree. F., preferably below about 1050.degree. F. to control the microstructure, and cold rolling to a final product gauge. Such a final product gauge for fin stock applications include thickness in the range of about 0.003-0.006 inch. The cold rolled alloy is then partially annealed to attain desired levels of strength and formability.

Abstract: The invention relates to magnetic Pd-Co alloys for use in dental prostheses, in particular in root caps. The alloys contain, by weight, 40-60% Pd, 20-59% Co, 0-40% Ni, 0.1-5% Cr, 0.05-0.2% Re, 0.01-0.5% Fe, 0.5-3% Ga, 0-0.1% B, 0-5% Pt or Au, and the gallium may be replaced, in full or in part, by Sn, In, Zn or Mn.

Abstract: A novel aluminum alloy contains vanadium as an alloying element, at a concentration ranging from about 0.02% to about 0.4% by weight. The vanadium imparts corrosion resistance to the alloy, particularly when the alloy is used as a core alloy in a vacuum brazing sheet. A further improvement in corrosion resistance is achieved by processing the alloy or brazing sheet in such a manner that the final processing step is a cold work to a reduction of about 10% to about 20%.

Abstract: A method of joining ceramics and metals to themselves and to one another at about 800.degree. C. is described using a brazing filler metal consisting essentially of 35 to 50 at. % copper, 40 to 50 at. % silver, 1 to 15 at. % titanium, and 2 to 8 at. % tin. This method produces strong joints that can withstand high service temperatures and oxidizing environments.

Abstract: A plug comprises a refractory body having a plurality of gas passgeways through which gas is blown into a refining apparatus. Each gas passageway may be defined by at least two metal tubes which are longitudinally spaced apart from each other. Alternatively, each gas passageway may be at least partly defined by an electrically insulating tube. The plug may alternatively have a plurality of gas passageways each having a bare refractory wall, while the body is reinforced with nonconductive mineral fibers, or metal wires which do not continuously extend throughout the plug. The plug may further be provided with a plurality of elongated holes extending in parallel to the gas passgeways from the inner surface of the body facing the interior of the refining apparatus to an intermediate portion thereof.

Abstract: A lead based alloy is modified by adding thereto a surfactant consisting of about 0.01 to 0.5 weight percent tellurium, about 0.01 to 0.5 weight percent selenium, about 0.01 to 0.5 weight percent selenium plus about 0.1-0.5 weight percent antimony, and mixtures thereof. The alloy is rapidly solidified by forming a melt thereof containing the surfactant addition and quenching the melt on a moving chill surface at a quenching rate of at least about 10.sup.3 .degree. C./sec. Addition of the surfactant lowers melt surface tension and thereby promotes improved wetting.

Abstract: An apparatus for producing ultrafine particles by arc energy characterized by disposing an electrode inclinedly as to a base material so as to generate a magnetic blow to arc, disposing a suction opening at the direction of the arc blown, and cooling vapors generated, followed by collection thereof can improve the production efficiency of ultrafine particles with a uniform particle size.

Abstract: A light-weight vehicle frame structure formed by plural tubular structural members which each have a tubular body and a flange integral with the tubular body and extending along the entire length thereof and outwardly of the tubular body, and a plate connected to the flanges of one or more of tubular structural members to reinforce and join them. The tubular body may be round, square or any other shape and the flange may extend radially or tangentially in various embodiments. The plate is bent, cut and formed for the edges to be coplanar with the flanges to which they are attached.

Abstract: An oxygen lance for steelmaking is provided with a top adapter assembly of generally T-shaped configuration including a central tubular barrel and a transverse top plate which both contain the O'rings required to assure complete adequate sealing between the oxygen gas and the cooling medium utilized in the furnace.The O'rings are placed on the outside circumference of the central barrel and are held in place in grooves therein so that they cannot be accidentally displaced during oxygen blowing or during assembly and disassembly of the lance. Access to the O'rings is simplified and assured while maintaining complete sealing integrity of the T-shaped top plate and complete sealing reliability during operation. The T-shaped top plate carries the sealing O'rings in grooves provided in the tubular vertical barrel and in a transverse plate thus providing means whereby interchange of the bottom assembly in the lance combination is quickly achieved in the field or factory.

Abstract: A nozzle for refining metals or ferroalloys by oxygen blasting from above the melt is presented. The nozzle terminates at a nozzle head and includes at least one central blast pipe for directing a jet of oxygen having supersonic speed. A chamber is interposed between the mouth of the blast pipe and the mouth of the nozzle head. This chamber widens progressively from the mouth of the blast pipe, and narrows toward the mouth of the nozzle head. At least one opening from at least one lateral duct opens to the chamber in the vicinity of the blast pipe mouth. Each lateral duct is connected to a source of gas, and includes an inidividual flow control valve. Preferably, at least three lateral ducts are arranged symmetrically around the blast pipe mouth.

Abstract: A zinc/aluminum alloy feedstock containing 18-30% by weight Al, 0.003-0.2% by wt. Mg, 0.5-2.5% by wt. Cu, 0.02-0.5% by wt. Fe, 0-0.1% by wt. Si, Zn balance (including any impurities) is capable of achieving high plasticity at temperatures of 240.degree. C. or above after being subjected to a multistage heat treatment including an extrusion step.