Abstract:
The disclosure generally relates to a wear resistant turbine fan blade having a composite lubricated sheet adhered to a root of the turbine fan blade and having improved tribological properties at high temperatures.
Abstract:
A tubular threaded joint which is free from harmful heavy metals, which has excellent galling resistance, gas tightness, and rust-preventing properties and which does not readily undergo yielding of shoulder portions even when subjected to makeup with a high torque is constituted by a pin 1 and a box 2 each having a contact surface comprising an unthreaded metal contact portion including a seal portion 4a or 4b and a shoulder portion 5a or 5b and a threaded portion 3a or 3b. Of the contact surface of at least one of the pin and the box, the surfaces of the seal portion and the shoulder portion has a first lubricating coating 10 in the form of a solid lubricating coating, and the surface of the threaded portion or the entire surface of the contact surface has a second lubricating coating 11 selected from a viscous liquid lubricating coating and a solid lubricating coating. The first lubricating coating has a coefficient of friction which is higher than that of the second lubricating coating, and the second lubricating coating is positioned on top in a portion where both the first lubricating coating and the second lubricating coating are present.
Abstract:
In einer elektrischen Maschine mit einem Wälzlager (3), dessen Innenring (5) auf der Rotorwelle (2) der elektrischen Maschine sitzt, dessen Außenring (4) in einem Gehäuse (1) sitzt und das sich in einem abgeschlossenen Raum (8) befindet soll das Wälzlager (3) vor elektrischen Durchschlägen geschützt sein. Dazu enthält der Raum (8) eine Flüssigkeit auf wässriger Basis, deren Spiegel (13) die Außenkontur des Innenringes an seiner tiefsten Stelle (14) überragt. Dadurch sind Innenring (5) und Außenring (4) leitend verbunden und der Spannungsausgleich zwischen Rotor und Gehäuse (1) der elektrischen Maschine kann ungehindert und ohne Durchschläge erfolgen. In einer Anwendung als Getriebemotor ist auch das Schmiermittel des Getriebes eine Flüssigkeit auf wässriger Basis.
Abstract:
The invention relates to methods for enhancing the lubricity of a surface by forming at least one metal oxide on the surface. In some embodiments, the metal oxide enhances the lubricity, and in other embodiments, the metal oxide works with another lubricant to further enhance lubricity. The wear rate of a metal surface is reduced dramatically when at least one metal oxide is formed on the surface, in some embodiments.
Abstract:
A biphasic nanoporous vitreous carbon material with a cementitious morphology characterized by presence of non-round porosity, having superior hardness and tribological properties, as useful for high wear-force applications. The biphasic nanoporous vitreous carbon material is produced by firing, under inert atmosphere, of particulate vitrified carbon in a composition containing (i) a precursor resin that is curable and pyrolyzable to form vitreous carbon and, optionally, (ii) addition of one or more of the following: solid lubricant, such as graphite, boron nitride, or molybdenum disulfide; a heat-resistant fiber reinforcement, such as copper, bronze, iron alloy, graphite, alumina, silica, or silicon carbide; or one or more substances to improve electrical conductivity, such as dendritic copper powder, copper "felt" or graphite flake, to produce a superior vitreous carbon that is useful alone or as a continuous phase in reinforced composites, in relation to conventional glassy carbon materials.
Abstract:
The invention relates to a high-temperature lubricant for use in the hot-forming of high-grade steels and carbon steels, said lubricant containing graphite, organic aerating agents and inorganic parting agents. The invention also relates to the use of such a lubricant. The aim of the invention is to provide a high-temperature lubricant that can be used for a wide range of steel qualities for various wall thicknesses and extensions to be obtained by rolling and that is temperature-stable, allows uniform rolling results with varying wall thicknesses and/or steel qualities and does not lead to the undesired carburization of the rolling stock. For this purpose, the high-temperature lubricant according to the invention comprises at least the following components in weight percent, based on the solids content: (a) 40 to 90% by weight of graphite, (b) 2 to 50% by weight of organic aerating agents, (c) 5 to 50% by weight of inorganic parting agents, the organic aerating agent (b) being selected from the group consisting of melamine, melam, melem, melon, phosphate salts and polyphosphate salts of the aforementioned compounds having phosphate chain lengths in the range of n = 1 to 1000, reaction products and addition products of the aforementioned compounds with cyanuric acid or isocyanuric acid and mixtures thereof, and the inorganic parting agent (c) being a layered silicate or a mixture of layered silicates.
Abstract:
Lubricants including at least one trimetasphere, lubricant additives including at least one trimetasphere, lubricant coatings including at least one trimetasphere, corrosion-resistant coatings including at least one trimetasphere and thermally-conductive materials comprising at least one trimetasphere are provided. Methods of making and using such lubricants, additives, coatings and materials are also provided.