Abstract:
A threaded joint for steel pipes comprises a pin (1) and a box (2) each having a threaded portion (3a or 3b) and an unthreaded metal-to-metal contact portion (4a or 4b) as contact surfaces which contact each other when the joint is fastened. The contact surfaces (3a and 4a and/or 3b and 4b) of at least one of the pin (1) and the box (2) are coated with a lower layer of a solid lubricating coating containing a solid lubricating powder (e.g., molybdenum disulfide, tungsten disulfide, or graphite) and a binder (e.g., an epoxy or other organic resin) and an upper layer of a solid corrosion protective coating formed by an organic resin which does not contain solid particles.
Abstract:
A threaded joint for steel pipes comprises a pin (1) and a box (2) each having a threaded portion (3a or 3b) and an unthreaded metal-to-metal contact portion (4a or 4b) as contact surfaces which contact each other when the joint is fastened. The contact surfaces (3a and 4a and/or 3b and 4b) of at least one of the pin (1) and the box (2) are coated with a lower layer of a solid lubricating coating containing a solid lubricating powder (e.g., molybdenum disulfide, tungsten disulfide, or graphite) and a binder (e.g., an epoxy or other organic resin) and an upper layer of a solid corrosion protective coating formed by an organic resin which does not contain solid particles.
Abstract:
According to the invention there is provided a method of reducing wear of one or both of two steel elements having surfaces in sliding or sliding-rolling contact. The method involves applying an HPF friction control composition to one, or more than one contacting surface of one or both of the two steel elements. In a particular example, the HPF friction control composition comprises a rheological control agent, a lubricant, a friction modifier, and one, or more than one of a retentivity agent, an antioxidant, a consistency modifier, and a freezing point depressant.
Abstract:
The invention involves a composition for forming a combined conversion and lubricating coating on a metal substrate with which the composition is brought into contact. The composition comprises (a) an oxyethylated aliphatic alcohol whose aliphatic hydrocarbon moiety contains 18 or more carbon atoms and (b) dissolved phosphate anions. Preferably the composition also comprises inorganic boron, an alkali metal salt of a fatty acid, and an accelerator for phosphate coating.
Abstract:
The invention relates to mechanical engineering and can be used for friction assemblies. The aim of the invention is to develop a method for forming an antifriction coating for contacting sliding surfaces, which increases the constancy, resistance and life time of said antifriction coating when subjected to normal and intensive mechanical and temperature actions and to ensure a high wearability of the surfaces. The inventive method consists in placing a mechanically pre-activated pulverized mixture of a material and a binding agent, which form the antifriction coating, between the sliding surfaces. Compositions of natural minerals containing in mass %: Mg3Si2O5 (OH)4 - 10-60, MgFe2O4 - 10-60, MoS2 - 1-20, and of associated rare-earth elements - 0,1 - 10, H2O - not more than 5, are used as the material forming the antifriction coating. The mechanical pre-activation can be carried out with a pressure pulsation in a range of 0.01 - 10 MPa at a temperature of 100-200 DEG C.
Abstract translation:本发明涉及机械工程,可用于摩擦组件。 本发明的目的是开发一种用于形成用于接触滑动表面的抗磨涂层的方法,当受到正常和强烈的机械和温度作用时,其增加了所述抗磨涂层的恒定性,耐久性和使用寿命,并确保高耐磨性 表面。 本发明的方法包括在滑动表面之间放置形成减摩涂层的材料和粘合剂的机械预活化粉碎混合物。 含有质量%的天然矿物组成:Mg 3 Si 2 O 5(OH)4-10-60,MgFe2O4-10-60,MoS2-1-20和相关稀土元素--0.1-10,H 2 O - 不大于 5用作形成抗磨涂层的材料。 机械预激活可以在100-200℃的温度下以0.01-10MPa的压力脉动进行。
Abstract:
Mucilages and mucilage extracts are disclosed that are effective as water-soluble, non-toxic, biodegradable, environmentally benign lubricants and/or coolants for a variety of industrial and machining purposes. One embodiment of the invention is a cooling and/or lubricating composition comprising sufficient amount of the mucilage to cool and/or lubricate a machining surface. Other embodiments further comprise a sufficient amount of a preservative to substantially inhibit degradation of the composition. Also encompassed within the scope of this invention are methods for making mucilage-comprising cooling and/or lubricating compositions, as well as concentrating and drying such compositions. Other aspects of this invention are methods for machining a surface, comprising extracting a mucilages, adding a sufficient amount of a preservative to substantially inhibit degradation of the mucilage to form a mucilage mixture, applying the mucilage mixture to a surface to be machined, and thereafter machining the surface. In another aspect, the invention provides methods for lubricating and/or cooling a machining surface comprising extracting a mucilage, adding a sufficient amount of a preservative to substantially inhibit degradation of the mucilage to form a mucilage mixture, and applying the mucilage mixture to the machining surface to act as a lubricant and/or coolant. A further aspect of this invention is the use of plant mucilage to coat the outer hull of watercraft, thereby reducing friction and drag, and increasing the speed of the craft. Optionally, such a composition may further comprise a cream wax.
Abstract:
Thus, the instant invention is directed toward an oil for diesel engines comprising an admixture of (A) a major amount of an oil of lubricating viscosity, (B) at least 4 mass % dispersant, (C) at least 0.3 mass % of a metal phenate, (D) less than 0.1 mass % friction modifier, (E) less than 0.3 mass % of sulfurized phenols and, (F) less than 0.12 mass % neutral calcium sulfonate.
Abstract:
A disc drive data storage system (10) according to the present invention includes a housing (12), a central axis (80), a stationary member (34) which is fixed with respect to the housing (12) and coaxial with the central axis (80), and a rotatable member (36) which is rotatable about the central axis (80) with respect to the stationary member (34). A stator (38) is fixed with respect to the housing (12). A rotor (70) is supported by the rotatable member (36) and is magnetically coupled to the stator (38). At least one data storage disc (16) is attached to and is coaxial with the rotatable member (36). A hydro bearing (37) interconnects the stationary member (34) and the rotatable member (36) and includes a lubrication fluid (84) comprising a blend of a base fluid and a shear resistant, polymer viscosity index improver.