Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Ingredient Concentration in weight % ______________________________________ Ni balance Co 15 Cr 10 Mo 3 Al 4.5 Ti 4.0 Ta 2.70 Nb 1.35 Zr 0.06 V 1 C 0.05 B 0.03.

Abstract: A method of producing a hot-dip galvannealed steel sheet from a very-low-carbon cold-rolled steel sheet containing not less than 0.01 wt % but not more than 0.1 wt % of Ti, by subjecting the cold rolled steel sheet to a process conducted in a continuous hot-dip galvanizing system including a heat treatment, hot-dip galvanizing and a subsequent galvannealing. The method is characterized by the steps of: subjecting the cold-rolled steel sheet to a degreasing and an acid cleaning; subjecting the degreased and acid-cleaned steel sheet to a heat treatment conducted in a reducing gas atmosphere; and cooling the heat-treated steel sheet at a temperature not lower than 380.degree. C. but not higher than the hot-dip galvanizing bath temperature, before the steel sheet is subjected to the hot-dip galvanizing. The very-low-carbon cold- rolled steel sheet contains, besides not less than 0.01 wt % but not more than 0.1 wt % of Ti, not more than 0.005 wt % of C, not less than 0.01 wt % but not more than 0.

Abstract: There is provided a curable composition, comprising:A. a heterocyclic compound selected from the group consisting of epoxy-functional silicones, epoxy-functional acrylic polymers, and monomers selected from the group consisting of tetrahydrofurans, oxetanes, lactones, spirocarbonates, spiroesters, cyclic sulfur and cyclic nitrogen compounds;B. an Si-H functional silicon compound; andC. a platinum catalyst.There is further provided a method for polymerizing a heterocyclic compound using a platinum catalyst.

Abstract: A gas-permeable material with excellent compatibility with blood comprising polyurethane, polyurethaneurea, or the derivatives thereof is provided. The polyurethane or polyurethaneurea is obtained from a composition that comprises diisocyanate; polysiloxane containing terminal hydroxyl groups; and polyol or polyamine containing at least one tertiary amino gorup. The derivatives of the polyurethane or polyurethaneurea is obtained by the following steps of: converting the tertiary amino groups contained in the polyurethane or the polyurethaneurea to quarternary ammonium groups, and treating the polyurethane or the polyurethaneurea having quarternary ammonium groups with heparin.

Abstract: A curable polydiorganosiloxane is reinforced by mixing with a solution of polyvinylalcohol (PVA) or a modified PVA. The polydiorganosiloxane is then cured and the solvent is extracted to yield a cured polydiorganosiloxane reinforced with PVA.

Abstract: An iron, nickel-, chromium base alloy having an austenitic structure, good high temperature features, including a very high resistance to oxidization in an oxidizing atmosphere and to carburization in a carborizing atmosphere at high temperatures, and a high creep fracture resistance. The alloy has the following composition in weight percent: 0.01-0.08 carbon, 1.2-2.0 silicon, from traces up to 2 manganese, 22-29 chromium, 32-38 nickel, 0.01-0.15 rare earth metals, 0.08-0.25 nitrogen, with the balance essentially of only iron and unavoidable impurities and normally occurring accessory elements in normal amounts. The rare earth metals in combination with the silicon content serve to improve the growth of a protecting silicon dioxide-layer on the metal surface, when the metal surface is subjected to high temperatures in oxidizing atmospheres. This counteracts the transportation of metal irons, in particular chromium, out of the alloy so that scaling is minimized.

Abstract: A curable polydiorganosiloxane is reinforced by mixing with a modified polyvinylalcohol (PVA). Fully hydrolyzed PVA is modified by dissolving or swelling in solvent, then adding a silylating agent of the formula R".sub.b (R'.sub.2 SiO).sub.n SiR.sub.a X.sub.4-a where R is a group capable of undergoing hydrolysis to form a siloxane bond with the curable polydiorganosiloxane, R' is a monovalent alkyl or aryl radical having from 1 to 6 carbon atoms, optionally halogen substituted, and compatible with the curable polydiorganosiloxane, R" is either R or R', X is a radical reactive with the hydroxyl on the PVA, a and b are integers of 0 to 3 inclusive, the sum of a plus b is from 1 to 3 inclusive, and n is from 0 to 35. This modified PVA is then mixed with the curable polydiorganosiloxane. The polydiorganosiloxane is then cured and the solvent is extracted to yield a cured polydiorganosiloxane reinforced with polyvinylalcohol.

Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Ingredient Concentration in Weight % ______________________________________ Ni balance Co 10 Cr 15 Mo 4 Al 4 Ti 3.5 Ta 2.5 Nb 1.25 Zr 0.06 C 0.05 B 0.

Abstract: An improved hardened insert and brake shoe adapted for use in bi-directional backstopping clutches is disclosed. The inserts are formed from a base material of high speed alloy tool steel, which is relatively inexpensive and easy to machine. The base material is formed into the desired shape for the insert, then hardened and tempered by conventional processes to achieve a desired hardness. Then, a coating of titanium nitride is applied to the insert by a physical vapor deposition process or a chemical vapor deposition process. The titanium nitride coating provides a very hard surface to the insert, which permits the insert to be used in the backstopping clutch. In an alternative embodiment, the brake shoes are formed in the manner described above, and no inserts are used in the clutch.

Abstract: Novel thermoset and thermoplastic organosilicon polymers, comprised substantially of alternating polycyclic hydrocarbon residues and cyclic polysiloxane or tetrahedral siloxysilane residues linked through carbon-silicon bonds, are disclosed.

Abstract: A worked rod extrusion product for fabricating into products having high wear resistance surfaces, the product comprised of 11 to 13.5 wt. % Si, 0.5 to 1.45 wt % Cu, 0.8 to 3 wt. % Mg, 0.5 to 2.95 wt. % Ni, max 1 wt. % Fe, max 0.1 wt. % Cr, max 0.25 wt. % Zn, the balance aluminum, incidental elements and impurities.

Abstract: The present invention relates to an article (e.g., of wood) coated with a one-part, mositure-curable, urethane composition. The composition comprises trisocyanate prepolymer, an epoxy silane, and compatible solvent.

Abstract: A bake hardening cold-rolled steel sheet which has good bake hardenability, good dent resistance, and low yield ratio which contributes to the shape-fixability of the steel sheet. The steel is suitable for the outer panel of an automobile. The process for manufacturing the steel sheets includes the following steps:(1) preparing a melting steel which contains 0.02 to 0.06% carbon by weight, 0.60% to 1.40% manganese by weight, 0.5% silicon by weight at most, 0.1% phosphorus by weight at most, 0.1% aluminum by weight at most, 0.01% nitrogen by weight at most, 0.1% titanium by weight at most, and 50 ppm of boron at most;(2) preparing steel ingots by continuous casting the melting steel;(3) hot rolling the steel ingots to hot-rolled bands;(4) coiling the hot-rolled bands at temperature ranging from 560.degree. C. to 720.degree. C.;(5) after cold rolling, soaking the steel sheets at temperature ranging from 780.degree. C. to 900.degree. C.

Abstract: A novel organosilicon prepolymer, which is the partial reaction product of (a) a cyclic polysiloxane or a tetrahedral siloxysilane containing at least two hydrosilane groups and (b) a polycyclic polyene having in its rings at least two chemically distinguishable carbon-carbon double bonds, wherein the ratio of carbon-carbon double bonds in the rings of (b) to hydrosilane groups in (a) is greater than 0.5:1 and up to 1.8:1, and at least one of the compounds (a) and (b) has more than two reactive sites, a method for making the organosilicon prepolymer, and a method for preparing an organosilicon polymer therefrom, are disclosed.

Abstract: An improved aluminum-silicon alloy having relatively substantial additions of tin and bismuth is provided which is particularly wear-resistant and sufficiently self-lubricating so as to be suitable for use in a wearing component even when poorly lubricated. The relatively high tin and bismuth additions within the alloy cooperate with the other elemental additions so as to provide a sufficiently low friction bearing surface (or self-lubricity) which significantly enhances the wear resistant properties of the alloy. In particular, the preferred aluminum alloy is used to form a socket plate which receives high strength steel bearing members within a compressor unit of an automobile air conditioning system. The improved aluminum alloy minimizes wear and alleviates galling of the socket plate during use.

Abstract: Welding alloys based upon aluminum, copper, mangesium, silver and lithium have been found to possess exceptional properties such as resistance to hot cracking, high strength and ductility, and an unexpected natural aging response. The aluminum-base alloys may contain 3.5 to 7 weight percent Cu, 0.05 to 1.5 weight percent Mg, 0.01 to 2 weight percent Ag, 0.1 to 4 weight percent Li, and 0.01 to 2 weight percent grain refiner.

Abstract: A conveyor defines a path along which hot rolled steel rod is transported in the form of overlapping mutually offset rings. Air nozzles are arranged beneath the conveyor path to direct air upwardly against the rings from underlying plenum chambers fed by motor driven fans. Additional water nozzles are arranged to apply water to the rings. Some of the thus applied water is vaporized by the heat of the rod, and the remainder of the water is drained through the air nozzles into the plenum chambers for subsequent removal.

Abstract: The sheet metal which has recrystallized as fine grains and has superplastic characteristics consists of a work-hardenable, age-hardenable AlMgZn alloy. After continuous casting, the alloy containing 3-5.5% of magnesium, 2-8% of zinc, 0.4% of copper, 0-1% of manganese, 0-0.5% of iron, 0-0.4% of chromium, 0-0.4% of molybdenum, 0-0.4% of zirconium, 0-0.3% of silicon and 0-0.05% of titanium, the remainder being aluminium of commercial purity, is homogenized and rolled off hot. After an optional intermediate annealing, the strip is rolled off cold to the final thickness using a high degree of cold rolling, recrystallized, using rapid heating to effect softening, and cooled.

Abstract: A composite body for rotary anodes of X-ray tubes is made from graphite, a carbide-forming, high-melting metal component and a multi-layered intermediate layer. The first layer of the intermediate layer closest to the graphite is made up of a metal or an alloy thereof which does not form a carbide. Applied over the first layer are at least two double layers. Each double layer has one individual layer of at least one carbide-forming metal or at least one carbide thereof, and a second individual layer of a metal or an alloy thereof which does not form a carbide. Preferred carbide-forming metals are tungsten, tantalum, hafnium and niobium. Preferred metals which do not form carbides are rhenium and platinum. In a preferred embodiment, the composite body is a rotary anode for X-ray tubes, with a basic body made of graphite and a burning track made of tungsten or a tungsten-rhenium alloy applied directly to the intermediate layer.

Abstract: A method is provided for thermally treating a high strength, microalloyed steel so as to first induce sufficient ductility (and corresponding low strength) in the microalloyed steel to readily enable the room temperature forming and/or machining of the steel. This is accomplished by appropriately heating to a solutionizing temperature and then cooling from this temperature at an extraordinarily slow rate so as to induce coarse precipitation of any strengthening particles and to thereby minimize the strengthening contributions associated with precipitates and ferrite grain size. The formed low strength components are then thermally treated again (such as during a copper brazing cycle) so as to induce high strength and relatively lower ductility in the microalloyed steel.