Abstract:
In a tubular threaded joint composed of a pin 1 and a box 2 each having a contact surface comprising a threaded portion and an unthreaded metal contact portion including a seal portion and a shoulder portion, a solid lubricating coating 10 having a relatively high Knoop hardness is formed on a portion including the shoulder portion of the contact surface (such as the unthreaded metal contact portion including the shoulder portion and the seal portion) of at least one of the pin and the box, and a solid lubricating coating 11 having a relatively low Knoop hardness is formed at least on the remaining portion of the contact surface (such as the threaded portion). The tubular threaded joint has excellent galling resistance, gas tightness, and rust preventing properties, and since it has a large ΔΤ, it does not readily undergo yielding of shoulder portions even when it is made up with a high torque, thereby making it possible to perform makeup in a stable manner.
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:
A threaded joint for steel pipes having excellent galling resistance, rust preventing properties, and airtightness without using a compound grease comprises a pin and a box each having a threaded portion and an unthreaded metal-to-metal contact portion serving as contact surfaces. The contact surfaces of at least one of the pin and the box are coated with a multi-layered structure comprising, from the bottom, a first layer formed from a first metal or alloy, a second layer formed from a second metal or alloy which is softer than the first metal or alloy, and an uppermost layer of a solid lubricating coating comprising a lubricating powder in an organic or inorganic binder.
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.
Abstract:
A process for producing a metal wire rod for plastic working, characterized in that it comprises the steps of cleaning the surface of a wire rod of a metal such as steel, stainless steel or aluminum for 20 seconds or less, by the use of at least one cleaning method selected from the group consisting of shot blasting, sand blasting, bending, anodic pickling and cathodic pickling, contacting the resulting wire rod, for 5 seconds or less, with an aqueous treatment liquid for forming a lubricating coating film comprising at least one inorganic salt selected from the group consisting of a phosphate, a sulfate, a borate, a silicate, a molybdate and a tungstate, and at least one lubricating agent selected from the group consisting of a metal soap, a wax, polytetrafluoroethylene, molyblenum disulfide and a graphite, and drying the rod immediately after the cleaning, and the steps are carried out continuously in an in−line system, to form a lubricating coating film on the surface of the wire rod in an amount of 0.5 to 20 g/m 2 . The process allows the production of a metal material for plastic working having excellent lubricating characteristics in a short time.
Abstract translation:一种用于塑料加工的金属线材的制造方法,其特征在于,其包括以下步骤:至少使用钢,不锈钢或铝等金属线材的表面清洁20秒以下 选自喷丸,喷砂,弯曲,阳极酸洗和阴极酸洗的一种清洁方法,使所得到的线材接触5秒或更少的水溶液,以形成润滑涂膜,所述润滑涂膜包括至少一个 选自磷酸盐,硫酸盐,硼酸盐,硅酸盐,钼酸盐和钨酸盐的至少一种无机盐,以及选自由金属皂,蜡,聚四氟乙烯,二硫化钼组成的组中的至少一种润滑剂,以及 石墨,并在清洁后立即干燥棒,并且在直线系统中连续进行步骤,以在线的表面上形成润滑涂膜 棒数量为0.5至20g / m 2。 该方法允许在短时间内生产具有优异润滑特性的用于塑性加工的金属材料。
Abstract:
A solid lubricant and composition useful for lubricating the flanges of locomotive wheels, railcar wheels, rail track and in applications where it is desirable to reduce friction when metal contacts metal. The solid lubricant having from about twenty-five percent to about seventy percent by volume of a polymeric carrier, about five to seventy-five percent by volume of organic and inorganic extreme pressure additives, about zero to twenty percent by volume synthetic extreme pressure anti-wear liquid oil, and about zero to one percent by volume optical brightener.