Abstract: Method for hard facing iron or iron base alloy substrates using as a hard facing material a solid composition consisting essentially of grains of vanadium carbide having in solid solution from about 10 to 50% by weight tungsten, and containing from about 0.5 to 5% by weight manganese and 0 to 3% by weight copper in the grain boundaries.

Abstract: Method for hard-facing substrates is disclosed using a hard facing material consisting essentially of at least one vanadium carbide. In a particular embodiment of the invention tungsten is present in the hard facing material in solid solution with vanadium carbide.

Abstract: In a centrifugal fan having radially directed fan blades, each having, in combination, a serrated surface forming in longitudinal cross-section a sawtooth configuration in the radial direction of the rotating blade with a wear resistant coating over a substantial area of the serrated surface.

Abstract: A food casing article includes a hollow tubular core casing carrier provided with a casing retention element for holding the casing a predetermined distance from a connection means employed at one end of the tubular casing carrier, the retention element being formed by compressing together a part of a thermoplastic tube while softened to form an annular, double-walled flange extending outwardly from around the side walls of the tube.

Abstract: A coating is applied to a microporous support in the presence of a volatile liquid capable of drawing the coating into the support and of desolvating the coating. The liquid is thereafter volatilized with the resulting dry ultrafiltration membrane being essentially crack-free and having desirable mechanical and chemical stability. The support may be pretreated with a volatile liquid, such as acetone, prior to the applying of the coating to the support. Alternately, the coating material can be dispersed in a volatile liquid, such as methanol, to form a coating suspension that is applied to the support. The coating material, preferably zirconia, will have a particle size within the range of from about 5 m.mu. to about 10.mu., with the coating having a thickness of up to about 20.mu.. The support, such as a porous carbon tube, will have a pore volume of about 5-60% and a pore size of about 5 m.mu.-40.mu.. Stability is enhanced by firing the membrane at 25.degree. C.-1500.degree. C. preferably at about 400.

Abstract: An aluminum coated carbon article or composite, and process therefor having aluminum chemically bonded to carbon via an interface of a metal monocarbide formed in situ when an intermetallic phase comprising aluminum and a metal capable of reacting with carbon to form a metal carbide is reduced by carbon to aluminum and a metal carbide, the metal selected from the group consisting of tantalum, titanium and hafnium.

Abstract: Addition of vanadium to molten iron-base alloys using an agglomerated mixture of V.sub.2 O.sub.3 and calcium-bearing reducing agent.

Abstract: A method for producing a vanadium- and nitrogen-containing material (V.sub.2 N) in which nitrogen gas is introduced into a furnace containing a mixture of V.sub.2 O.sub.3 and carbon in stoichiometric proportion while simultaneously maintaining the temperature in the furnace in a range of from about 1000.degree. C. to 1500.degree. C. under a reduced pressure in the range of from about 5 mm to 100 microns.

Abstract: Metal/ceramic abradable seals of the type used in jet aircraft are improved by using a substrate which is able to deform during cooling from the brazing temperature and then rendering the substrate rigid after the cool down.

Abstract: Addition of a metal selected from niobium, molybdenum, chromium and tungsten to molten iron-base alloys using an agglomerated mixture of a selected metal oxide and calcium-bearing reducing agent.

Abstract: Molybdenum is removed from a uranium bearing alkaline carbonate leach solution, by adding a compound which provides lead ion to react with the molybdenum present to form insoluble lead molybdate (PbMoO.sub.4) which precipitates from the solution.

Abstract: Addition of vanadium to molten iron-base alloys using an agglomerated mixture of V.sub.2 O.sub.5 and calcium-bearing reducing agent.

Abstract: A vanadium-silicon alloy having a low carbon and oxygen content is produced by vacuum furnacing a mixture of V.sub.2 O.sub.3, carbon and silicon metal in at least the stoichiometric amounts necessary to reduce V.sub.2 O.sub.3 and form V.sub.2 Si while preventing vanadium from combining with carbon and oxygen.

Abstract: A method for bonding a tubular shaft to an end fitting to produce an assembly wherein the shaft and the end fitting are in axial alignment and which is capable of transmitting high torque, said method employing an end fitting provided with a mating section having two concentric cylindrical walls which describe an annular cavity or socket adapted to receive the tubular shaft therein. The high torque carrying capacity of the joint produced in accordance with the invention results from the fact that the shaft is bonded to the mating section of the end fitting on both its interior and exterior surfaces and is in axial alignment with the end fitting. Such axial alignment results from the presence of a resilient sealing ring and an annular shoulder, positioned near the top and base of the inner cylindrical wall of the mating section, which contact the inner surface of the tubular shaft and center the shaft around said wall when the shaft is inserted into the bonding socket of the end fitting.

Abstract: Prior to evaporative crystallization of ammonium tungstate solutions to give ammonium paratungstate (APT), an aluminum compound, e.g. aluminum sulfate solution, is added to precipitate silicon and phosphorus impurities. The yield of crystallized ammonium paratungstate is thereby increased.

Abstract: A chrysotile asbestos base material is mixed in water containing dissolved alum (aluminum sulphate) prior to addition of the organo-silane coating.

Abstract: An improved multi-tubular module is provided for use in ultrafiltration and reverse osmosis devices. Improved mechanical strength is achieved in the module by bonding the individual tubes to each other at spaced intervals along their total length whereby lateral and axial movement of individual tubes with respect to one another is eliminated, resulting in a coherent monolith of tubes. Additionally, improved resistance to thermal cycling is imparted to the module by connecting the tube sheet or header to the module shell in a manner which allows for slight movement of the tube sheet with respect to the module shell and yet provides a device which can be easily sanitized or sterilized when used for food or drug applications.

Abstract: In the fusion of vanadium pentoxide powder heat is generated in a melt of the powder by passing an electrical current along a current path in the melt and additional vanadium pentoxide powder is fed onto the surface of the melt. A furnace is used which has an overflow weir.

Abstract: A composite drive shaft having a pair of aligned, diametrically opposed bores in which a cross-shaped coupling forming part of a universal joint is pivotally connected. This construction materially reduces the weight of drive shaft/universal joint combinations by eliminating the steel Hookes joint yokes which heretofore have been bonded into the shaft.

Abstract: Calcium or a calcium-bearing material is added to an aluminum-deoxidized steel in an amount which is sufficient to establish a calcium concentration exceeding the aluminum content by a value greater than about 0.14.