466results about How to "Self-lubricating" patented technology

The invention provides a high temperature resistance infrared radiation pottery dope, which belongs to the thermal engineering field. The dope is a mixture of the following materials in mass share: 200 mesh zirconium dioxide 10, 200 mesh zircon quartz sand 20, 300 mesh feldspar 10, 300 mesh cerium oxide 7, 300 mesh manganese sesquioxide 15, 300 mesh manganic oxide 3, 600 mesh titanium dioxide 2, 200 mesh alumina 10, 400 mesh graphite 10, 400 mesh boron nitride 3 and 200 mesh carborundum 10. The graphite and boron nitride in the dope are of lubricating and anti-bonding functions, the carborundum is of wear resistance function, the manganic oxide, titanium dioxide and alumina are of strong infrared ray emission and the dope mad of zirconium dioxide, zircon quartz, feldspar and cerium oxide has good compact structure and strong fire-proof and the manganese sesquioxide can catalyze C, S and N for conversion. Therefore, the invention is applicable for use in dynamic furnaces such as coal dust furnace, boiling furnace and fluidized bed furnace.

The invention discloses a modified polyphenylene sulfide coating and the application thereof. The modified polyphenylene sulfide coating consists of the following components by weight percentage: 60-90 percent of polyphenylene sulfide resin, 3-25 percent of poly-perfluorinated ethylene propylene resin, 3-20 percent of ethylene-tetrafluoroethylene copolymer resin, 1-5 percent of molybdenum disulfide, 1-5 percent of graphite and the balance of filler, wherein the filler is any one of or a mixture of zinc oxide, aluminum oxide, silicon carbide and chromium sesquioxide. The modified polyphenylene sulfide coating disclosed by the invention has the advantages that the compatibility among the components is good; a prepared coating layer has higher corrosion resistance, higher self-lubricity and strong wear-resistant ability, is resistant to high temperature, is highly insulated, has good toughness, can bear impact force capable of being borne by a metal surface, has excellent bond performance with a metal material and is particularly suitable for the using and working condition of cold / hot sudden changes which cannot be borne by glass lining equipment; and through spraying the coating disclosed by the invention on the surface of the metal matrix material, a manufactured work piece has excellent physical-chemical performance, a long service life and a wide application range.

The invention discloses a fluorine-containing metal coating on the surface of an NdFeB rare-earth permanent magnet and a preparation method of the fluorine-containing metal coating, and belongs to the technical field of anticorrosion surface treatment. The fluorine-containing metal coating has the thickness of 5-40 microns and is prepared from polytetrafluoroethylene, solid powder and adhesive according to the mass ratio of (1-30):(2-30):(20-40). The preparation method includes the steps of firstly, preprocessing the surface of the NdFeB rare-earth permanent magnet through an oil removal and acid pickling or sand blasting method; secondly, preparing the coating through a centrifugal soaking and throwing or spraying method. Polytetrafluoroethylene contained in paint for preparing the coating has excellent corrosion resistance, and the corrosion resistant capacity of the surface of the NdFeB rare-earth permanent magnet can be improved; in the coating process, no acid bath is used, the fresh surface of the magnet is not damaged after preprocessing, and the surface adhesion force between the coating and the magnet can be effectively improved; no acid waste liquid exists, the environment is not polluted, and the preparation method belongs to the green and environment-friendly coating process.

The invention relates to a preparation method of a novel electric contact composite material, and provides a preparation method of an Ag / Ti3SiC2 electric contact composite material. The preparation method comprises the following steps of: preparing silver coated Ti3SiC2 powder by a Tollen reagent chemical silvering method, then cleaning the powder with distilled water to neutral, washing with alcohol and drying in vacuum; carrying out ball milling on dried powder and silver powder and mixing uniformly; compacting the uniformly mixed powder into a green body through isostatic pressing, then carrying out sintering, repressing and re-sintering, and finally moulding through hot extrusion to obtain a finished product. According to the invention, wetabilities of a reinforcing phase and a silver matrix are improved through a silver loaded surface technology; severe clustering will not occur on a surface of the material eroded by arc; and contact resistance keeps at a low and stable range; meanwhile, material surface temperature rise can be maintained at a low level. A mixing amount of the reinforcing phase in the composite material can be increased substantially, and silver can be saved by 5-10%, compared with an Ag / SnO2 material.

The invention belongs to the field of lubricant additives, and particularly relates to a graphene oxide-polymeric microsphere water-based lubricant additive as well as a preparation method of the lubricant additive. The preparation method comprises the following steps: preparing graphene oxide powder and a polymeric microsphere emulsion, wherein the polymeric microsphere emulsion is the polyacrylate microsphere emulsion or polystyrene microsphere emulsion; adding the graphene oxide powder into the polymeric microsphere emulsion, conducting ultrasonic vibration until the graphene oxide powder is completely dispersed to obtain a graphene oxide-polymeric microsphere compound emulsion, and diluting the graphene oxide-polymeric microsphere compound emulsion to be with the mass fraction of 0.1-2% through the deionized water, so as to obtain the graphene oxide-polymeric microsphere water-based lubricant additive. The graphene oxide-polymeric microsphere water-based lubricant additive is adopted to replace the conventional oil-based lubricant, so that the friction coefficient can be reduced, the abrasion resistance can be improved, the environmental pollution can be reduced, the cost can be reduced, the use stability can be improved, and meanwhile, various efficacies of cooling, rust prevention, corrosion inhibition and the like can be achieved.

The invention discloses lubricating oil containing sheet magnetic nanometer Fe3O4 particles and a preparation method of the lubricating oil. The preparation method of the lubricating oil comprises the following steps of: (1), using oleic acid to clad sheet magnetic nanometer Fe3O4 particles to carry out surface modification to obtain modified Fe3O4 particles; (2), mixing the modified Fe3O4 particles with III base oil, wherein mass fraction of the modified Fe3O4 particles is 0.1%-2.0wt%, and preparing the lubricating oil containing sheet magnetic nanometer Fe3O4 particles through ultrasonic dispersion and high-speed shearing dispersion. The lubricating oil prepared by the preparation method disclosed by the invention has extremely good friction resistance and abrasion resistance, and high carrying capacity. Moreover, the prepared lubricating oil has the advantages of being stable in characteristics, capable of being stored for a long time without precipitation. Besides, the lubricating oil can be extensively applied to mechanical lubricating, can be used for saving energy consumption and prolonging service lives of mechanical parts, and therefore, the application prospect is extensive.

The invention discloses a novel roller bit sealing ring, which belongs to the field of bearing sealing. The novel roller bit sealing ring is disposed in a sealing groove between a bearing shaft hole and a tooth palm journal. Both ends of the sealing groove are respectively communicated with an inside lubricating oil channel and an outside drilling fluid channel. The novel roller bit sealing ring comprises a metal framework fixed in the sealing groove, the metal framework separates the sealing groove into a lubricating oil sealing groove communicated with the inside lubricating oil channel and a drilling fluid sealing groove communicated with the outside drilling fluid channel. A lubricating oil sealing part is disposed in the lubricating oil sealing groove and completely seals and separates the inside lubricating oil channel together with the metal framework. A drilling fluid sealing part is disposed in the drilling fluid sealing groove and completely seals and separates the outside drilling fluid channel together with the metal framework. The novel roller bit sealing ring is more suitable for severe environment of drilling work, and capable of more effectively and simultaneously separating lubricating oil and drilling fluid, rock debris and the like. Separation of lubricating oil and separation of drilling fluid do not affect each other, and service life of a sealing device is prolonged.