39results about How to "Reduce dry friction coefficient" patented technology

Lubricating varnish for coating a metal component or applied to a metal component, comprising a base coat as a matrix and at least one lubricant, wherein at least one antiwear agent (5) is additionally contained.

The invention relates to a lubricating oil additive containing ultrafine rare-earth powder. The additive consists of the following components in percentage by mass: natural serpentine mineral powder, ultrafine rare-earth powder, surfactant, a dispersing agent, a friction modifier, an auxiliary and base oil, wherein the ultrafine rare-earth powder is one of cerium hydroxide, neodymium oxide and cerium fluoride; the surfactant is borate, span-60 or oleic acid; the dispersing agent is either polyisobutene dibutyl succinimide or high molecular weight polyisobutene dibutyl succinimide; the friction modifier is one of melamine cyanurate, boron nitride and calciuym nitride; the auxiliary comprises 72% of dialkyl disulfo oxygen molybdenum phosphate sulfide, 18% of polymethyl tetradecyl acrylate and 10% of a vinyl-propylene copolymer; and the base oil is 500SN base oil. The additive has obvious corrosion resistance; and after an engine is treated technically by using the self-repairing additive, the dry friction coefficient of the machine is reduced from original 0.05 to be less than 0.005 and therefore the surface abrasion is reduced.

A compressed natural gas injector comprises a injector casing, a valve seat, an armature, a spring, a coil, a coil covering, a stop iron and an electric plug. The injector casing and the stop iron are inserted into the coil hole. By roll cladding and closing in of two ends of the coil covering, the coil, the coil covering, the stop iron and the injector are connected into one. The valve seat, the armature and the spring are disposed in order in the internal hole of the injector casing. There is an axial through-hole on the stop iron, an axial blind hole on top of the armature, a side hole at the bottom of the armature in communication with the axial blind hole and an axial through-hole on the valve seat. At the bottoms of the armature and the stop iron are sulphurized rubber pieces and in the internal hole of the injector casing and on the cylindrical surface of the armature are sprayed the polytetrafluoro ethylene films.

The invention relates to the technical field of electroplating, and particularly relates to a preparation method of a nickel-polytetrafluoroethylene coating. According to the invention, nickel is combined with polytetrafluoroethylene, a fluorinated ethylene-propylene copolymer, a perfluoroalkoxy copolymer and other assistants to be used as an electroplating solution and used for electroplating under certain conditions. The invention can be widely applied to various base materials such as steel, copper alloys, wrought aluminum, cast iron, stainless steel and the like, and can be also perfectly used on various injection molding materials except pure rubber, such as silica gel, TPO0, PVC (polyvinyl chloride) and the like. The coating is favorable in wear resistance and non-corrosibility, has weldability and hardenability, and causes no negative effect on the surfaces of other molds.

The invention relates to a zirconium and strontium compound micro-alloyed nickel-aluminum bronze and a preparation method thereof. The product is characterized by mainly comprising nickel-aluminum bronze, Zr (at the mass percent of 0.02-0.085%) and Sr (at the mass percent of 0.018-0.063%). The preparation process of the alloy is as follows: firstly, fusing the nickel-aluminum bronze, and then adding Al-Sr intermediate alloy and Al-Zr intermediate alloy; secondly, after completely fusing, adding a residue removing agent (for removing impurities), and introducing into high-purity nitrogen for refining; and lastly, pouring into a casting ladle, standing by, removing the residue and casting into an ingot, thereby obtaining the zirconium and strontium compound micro-alloyed nickel-aluminum bronze. Compared with the common nickel-aluminum bronze, the zirconium and strontium compound micro-alloyed nickel-aluminum bronze has the advantages that: the tissue is fine and small; the hardness and the corrosion resistance are increased; the friction coefficient is obviously reduced; and the nickel-aluminum bronze has wide application prospect in the fields of vessel propellers, sea water pumps, offshore oil platforms, seawater pipeline systems, mechanical moulds, bearings working under high speed, high pressure and high environment, lings, turbines, and the like.

The invention discloses a method of preparing biology activity composite thin film on surface of titanium alloy. Specifically, the titanium alloy which is processed before the convention is placed in a multi-sphere ion plating-magnetic control sputtering composite gas phase sedimentation vacuum system. A data link control (DLC) thin film with Ti as a transition layer is sedimentated. The composite thin film is composed of a titanium alloy base body, the DCL thin film and a casein phosphoric acid peptide activity egg white surface layer in sequence. A series of excellent qualities of the titanium alloy as the base body material are maintained by the thin film. The biology activity and the tribology performance are improved.

The invention discloses a multiphase composite reinforced low-friction silicon carbide ceramic sealing material. The low-friction silicon carbide ceramic sealing material is composed of the followingraw materials in percentage by weight: 86%-88% of silicon carbide, 6%-8% of yttrium aluminum garnet, 1%-2.5% of graphene, 1%-2.5% of nanometer zirconium diboride and 1%-2.5% of silicon carbide whiskers. The invention also provides a preparation method of the low-friction silicon carbide ceramic sealing material. The prepared silicon carbide ceramic sealing material is low in friction coefficient and high in mechanical property.

The invention provides strontium, titanium and boron composite microalloying manganese brass which is mainly prepared from the following components in percentage by weight: 0.01 to 0.03% of strontium (Sr), 0.01 to 0.05% of titanium (Ti), 0.002 to 0.008% of boron (B), and the balance of the manganese brass, wherein sum of mass percentage of the components is of 100%. The preparation method of an alloy comprises the technical processes as follows: melting the manganese brass; adding an Al-Sr intermediate alloy and an Al-Ti-B intermediate alloy in sequence, wherein materials are added based on specified sequence, which means that a following intermediate alloy just can be added after a previous intermediate alloy is melted; transferring into a casting ladle after the ally is completely molten; standing; removing slag; and casting to obtain an ingot, thus obtaining the strontium, titanium and boron composite microalloying manganese brass. Compared with a conventional manganese brass, the strontium, titanium and boron composite microalloying manganese brass provided by the invention has the advantages that texture is small, hardness is improved by 21.6%, an uniform corrosion speed in 3.5% of NaCl solution is reduced by 9.9%, and a frictional coefficient is greatly reduced.