139results about How to "Improve corrosion and wear resistance" patented technology

The invention discloses a scraping coating type polyurea elastomer corrosion-resistant and wear-resistant material and a preparation method thereof. The scraping coating type polyurea elastomer corrosion-resistant and wear-resistant material is characterized by comprising an ingredient A and an ingredient B, wherein the ingredient A is prepolymers with NCO end groups obtained through the reaction between 30 to 40 mass percent of polyether polyol and 60 to 70 mass percent of polyisocyanates; the ingredient B is prepared from 30 to 40 mass percent polyaspartic acid ester, 60 to 70 mass percent of filling materials and a small number of auxiliary agents through high-speed dispersion grinding. In the use process, the prepared ingredient A and the prepared ingredient B are weighed according to the weight ratio of 1:4, and are then uniformly mixed; next, scraping coating construction is performed. The material has the characteristics of high mechanical intensity, corrosion resistance, wear resistance, good anti-seeping performance, aging resistance, proper reaction speed, no solvent, convenient construction and the like. The scraping coating type polyurea elastomer corrosion-resistant and wear-resistant material is particularly suitable for industrial and mining enterprise equipment and spare part anti-corrosion wear-resistant liners.

The invention relates to a nano-crystalline alloy coating layer and a preparation method thereof. Particularly, the invention relates to a nano-crystalline alloy coating layer, the components of which, expressed by atomic ratio, satisfy the relational expression: (Fe1-aM1a)100-x-y-z-Alpha-Beta-GammaCuxSiyBzM2AlphaM3BetaXGamma, wherein, M1 is one or both of Co and Ni, M2 is at least one of Nb, W, Ta, Zr, Hf, Ti and Mo, M3 is at least one of V, Cr, Mn, Al, Sc, Y, Au, Zn, Sn and Re, X is at least one of C, Ge, P, Ga, Sb, In, Be and As, a is more than or equal to 0 and less than or equal to 0.5, x is more than or equal to 0.1 and less than or equal to 3, y is more than or equal to 0 and less than or equal to 30, z is more than or equal to 0 and less than or equal to 25, and furthermore, y plus z is more than or equal to 5 and less than or equal to 30, Alpha is more than or equal to 0.1 and less than or equal to 30, Beta is more than or equal to 0 and less than or equal to 10 and Gamma is more than or equal to 0 and less than or equal to 10, the volume percent of nano-crystals contained in the nano-crystalline alloy coating layer is above 50 percent and the crystal size of the nano-crystals is below 100nm. The invention also relates to the application and a preparation method of the nano-crystalline alloy coating layer.

The present invention relates to Co-base alloy, especially, an anticorrosive and antiwear cast Co-base alloy. The alloy consists of C 1.0-2.5 wt%, Cr 20-35 wt%, W 5-20 wt%, Mo 1-6 wt%, Nb 1-8 wt%, Cu0.5-2.0 wt%, Si 0.5-3.0 wt%, Ni 2-15 wt% and Co 35-65 wt%. It has excellent anticorrosive performance and average hardness of about 48 HRC, and may be used in making cutter of water flow type chemical fiber cutting machine. Substituting partial Co with Ni can reduce the cost of the alloy.

The invention discloses a preparation method of a high-boron and wear-resistant alloy, belonging to the technical field of molten zinc corrosion wear materials. The preparation method comprises the steps of uniformly mixing 45-50% of boron and iron powder, 14-16% of chromium iron powder, 3-5% of molybdenum iron powder, 4-4.6% of pure nickel powder, 1.5-2.5% of WC powder and 25-30% of pure iron powder which are within the particle size range of 140-200 meshes; and carrying out laser cladding on a stainless steel base material by using a fiber laser and a synchronous powder feeding method to obtain a high-boron and wear-resistant alloy laser cladding layer, the surface of which has no cracks, inclusions and air holes and is smooth.

The invention discloses a surfacing method for an antiseptic wear-resisting layer of a dovetail groove. According to the method, two dovetail groove workpieces are spot-welded back to back, slant groove surfaces and horizontal groove surfaces of the upper dovetail groove workpiece and the lower dovetail groove workpiece are alternately skip-welded sectionally at intervals by ER410NiMoTi surfacing material, welding residual stress is eliminated through heat treatment, and finally the two dovetail groove workpieces are separated, corrected and roughly machined. According to the surfacing method disclosed by the invention, welding deformation can be effectively avoided, and the formed surfacing layer can improve the antiseptic wear-resisting performance of the dovetail groove.

The invention discloses an integrated axial-suspension permanent-magnet synchronous shielding pump. The integrated axial-suspension permanent-magnet synchronous shielding pump comprises a pump body and a permanent-magnet shielding motor, wherein the permanent-magnet shielding motor is equipped with a winding stator, a pump shaft and a permanent-magnet rotor fixedly arranged on the pump shaft; thehead part of the pump shaft is connected with an impeller in the pump body; the pump shaft is supported by an axial-suspension bearing device on the end part of the permanent-magnet shielding motor; the axial-suspension bearing device comprises a bearing base and a shaft sleeve base; the bearing base is fixed with the permanent-magnet shielding motor, and comprises a static magnetic ring and a bearing; the shaft sleeve base is fixed with the pump shaft, and comprises a movable magnetic ring and a shaft sleeve which is positioned between the pump shaft and the bearing; each of the static magnetic ring and the movable magnetic ring is formed by axially combining a plurality of ring-shaped magnetic rings, wherein polarity of magnetic poles of the inner ring of the static magnetic ring and theouter ring of the movable magnetic ring alternatively changes axially; and polarity of the magnetic poles opposite to the inner ring of the static magnetic ring and the outer ring of the movable magnetic ring is reverse. The integrated axial-suspension permanent-magnet synchronous shielding pump can be utilized to reduce eddy-current loss of a permanent magnet motor, improves efficiency, and utilizes magnetic force of the permanent magnet to completely balance axial force.

The invention discloses a novel corrosion-resistant anti-wear metallic material which has the components with the weight percentage of 0.3-1.2% of C, 20-30% of Cr, 1-2.5% of Si, 0.5-1.5% of Mn, 3-8% of Ni, 1-4% of Mo, 1-4% of Cu, less than or equal to 0.035% of P, less than or equal to 0.04% of S, and the rest of Fe. As the novel corrosion-resistant anti-wear metallic material properly increases the carbon content and is added with the right amount of alloying elements, so that material structure contains a certain amount of alloy carbide, and the anti-wear performance of the material is greatly improved. Although the static corrosion-resistant performance is slightly reduced, the comprehensive corrosion-resistant anti-wear performance is greatly improved. In addition, the novel corrosion-resistant anti-wear metallic material can be smelted in an intermediate frequency furnace and needs no concentrated feeding stuff. The production cost is reduced more than CD4M-Cu material.

The invention relates to a high-aluminum high-strength refractory castable material which is prepared from the following components in parts by weight: 40-60 parts of bauxite, 5-10 parts of special kaolin, 2-8 parts of dolomite, 5-10 parts of zircon, 1-15 parts of silicon carbide, 5-10 parts of binder, 2-5 parts of coagulating powder, 1-2 parts of emery powder, 10-15 parts of aluminum oxide micro powder and 1-5 parts of water. Bauxite, special kaolin, dolomite, zircon and silicon carbide are mixed to prepare particles and fine powder, wherein the particles and fine powder comprise 40-60 parts by weight of particles and 60-40 parts by weight of fine powder; the particle size range of the particles is 3.0-1mm and the grain size of the fine powder is 0.9-0.1mm.

The invention discloses a high-temperature refractory material for a kiln lining. The high-temperature refractory material comprises the following raw materials in parts by weight: 20-40 parts of a high alumina material, 12-25 parts of special grade kaolin, 5-12 parts of an adhesive, 2-8 parts of an admixture, 10-15 parts of corundum fine powder, 8-15 parts of zircon sand, 5-15 parts of zirconium dioxide and 5-15 parts of chromium dioxide, wherein the high alumina material refers to special grade or first-grade bauxite and comprises coarse aggregate, fine aggregate and superfine powder. The invention further provides a method for preparing the high-temperature refractory material. The high-temperature refractory material prepared according to the raw material ratio and the preparation method provided by the invention is applied to the kiln lining. According to experimental detection, the high-temperature refractory material has excellent stability at a high temperature, the refractoriness reaches 1700 DEG C or higher even reaches 2000 DEG C, and the conventional market requirements are completely met.

The invention relates to metal pipe or pipe fitting surface abrasion-resistant and anticorrosion protection technologies, in particular to an abrasion-resistant and anticorrosion pipe or pipe fitting with double ceramic lining layers and a preparation method of the abrasion-resistant and anticorrosion pipe or pipe fitting. The pipe or pipe fitting is composed of an abrasion-resistant and anticorrosion lining layer and a metal layer from inside to outside. The abrasion-resistant and anticorrosion lining layer is composed of a surface layer and a composite layer. The surface layer is a compact ceramic layer. The composite layer is a foamed ceramic layer. The composite layer is directly grown on the back face of the compact ceramic layer. The preparation process comprises the following steps of preparation of mixed powder, prilling and slurry preparing, sheet forming through mold pressing and preparation of a foam precursor, bonding, thermosetting forming in a mold, machining and bonding forming, pyrolyzing and sintering, and finished product obtaining through compositing. According to the ceramic lining layer abrasion-resistant and anticorrosion pipe or pipe fitting prepared through the method, the abrasion-resistant service life can be 5-10 times that of rubber lining abrasion-resistant layers, the pipe or pipe fitting has good tolerability to acid and alkali corrosion and high-temperature impact, and the replacement cycle of pipe or pipe fitting equipment can be effectively prolonged, so that the operating cost of enterprises is reduced, and emission of particulate pollutants is reduced.

The invention discloses a preparation method of a wear-resistant, heat-insulation and corrosion-resistant powder coating. The powder coating is prepared from the following raw materials: benzoxazine resin, epoxy resin, chlorinated polyether, carboxylated-terminated acrylonitrile-polybutadiene rubber, a curing agent, barite powder and wollastonite powder. The wear-resistant, heat-insulation and corrosion-resistant powder coating can be prepared by processes such as melting, mixing and extruding, cooling for tabletting, crushing and sieving and has excellent wear and corrosion resistance and heat insulation properties, the surface of a processed coating meets the national and industrial standards on the aspects such as adhesive force, flexibility, impact strength, smoothness, hardness and chemical resistance, and the wear-resistant, heat-insulation and corrosion-resistant powder coating is low in curing temperature, convenient to use and capable of reducing the cost.

The invention discloses a high-alumina high-temperature refractory castable for a power station boiler, which is prepared from the following components in parts by weight: 60-80 parts of high-alumina aggregate, 5-12 parts of special-grade kaolin, 5-12 parts of binder, 2-8 parts of silicon micro-powder, 2-10 parts of alumina micro-powder and 1-5 parts of water, wherein in the 60-80 parts of high-aluminum aggregate, coarse aggregate accounts for 30-40%, medium aggregate accounts for 35-45%, and fine aggregate accounts for 20-30%; the binder is prepared from the following components in parts by weight: 20-40 parts of magnesium silicate and 80-60 parts of phosphate. The high-alumina high-temperature refractory castable disclosed by the invention has the beneficial effects that the boiler box temperature can be increased by 60-250 DEG C, the thermal efficiency can be improved to 8%, and the service life of the boiler body is prolonged.

The invention discloses a resin button formula and a production technology thereof. A resin button is prepared from, by weight, 30-50 parts of unsaturated polyester resin, 10-20 parts of calcium propionate, 5-10 parts of chitosan, 2-8 parts of glass fiber, 2-10 parts of microcrystalline wax, 2-8 parts of hollow glass microspheres, 1-5 parts of a curing agent, 1-6 parts of cobalt naphtenate, 5-10 parts of color paste, 1-8 parts of pearl powder and 2-10 parts of a thixotropic agent. Accordingly, the preparation technology is simple, the prepared resin button is high in strength, good in toughness and not likely to break, and meanwhile the resin button has the anti-corrosion and wear-resistant functions.

The invention belongs to the technical field of catalysts and particularly relates to denitration catalyst terminal hardening liquid as well as a preparation method and application thereof. The denitration catalyst terminal hardening liquid is applied to a coal-fired boiler flue gas denitration catalyst. The hardening liquid comprises the following raw materials in parts by weight: 5-25 parts of aluminum hydroxide, 30-60 parts of phosphoric acid, 30-60 parts of de-ionized water, 1-10 parts of metal oxide powder and 0.1-1 part of a suspension dispersant. With the adoption of the denitration catalyst terminal hardening liquid, the radial compressive strength of a catalyst terminal part can be improved by 150% or more; and meanwhile, more than or equal to 90% of catalytic activity is kept.

The invention relates to a preparation method of an ultrasonic-assisted nano cerium oxide doped Ni-W-TiN composite coating. According to the preparation method, the concentration of nickel ions in a plating solution is reduced, the concentration of W ions is increased, the content of a complexing agent is reduced, and the content of W components in the coating is increased; through an ultrasonic-assisted method, the concentration of TiN nano particles is reduced, an SDS auxiliary agent is used, agglomeration is reduced, and the distribution uniformity of the particles in the coating is improved; the corrosion resistance of the Ni-W-TiN coating is improved through doping of nano rare earth oxide CeO2; and meanwhile, the plating solution ratio and the process parameters are optimized. The preparation process comprises the following steps of 1, preparation of an electrolyte; 2, pretreatment of a base material; and 3, electro-deposition. According to the ultrasonic-assisted nano cerium oxide doped Ni-W-TiN composite coating, the agglomeration problem of the nano particles is effectively solved, the dispersion uniformity of the nano particles is improved, and the CeO2 and the TiN are coordinated to improve the protection performance of a Ni-W alloy. The coating has better wear resistance and corrosion resistance, the comprehensive performance is obviously improved, and the coating can better adapt to a severe corrosion environment.

The invention relates to an iron-based self-fluxing alloy amorphous coating method adopting supersonic arc spraying. According to the method, an iron-based self-fluxing alloy is prepared into sprayingpowder, the spraying powder is sprayed to the surface of a cold roll workpiece by the adoption of the supersonic arc spraying mode, and the iron-based self-fluxing alloy comprises, by mass percentage, 5-11% of Cr, 3.0-5.0% of B, 2.0-5.5% of Si, 2-5% of C, 1-3% of W, 0.3-1% of Mo, 0.1-1% of Nb, 0.1-3% of Y, 1-5% of NaBH4 and K2WO4 and NaF, 0.5-2% of nano-silica, 1-6% of nano-titania and the balance Fe. The powder is mixed by a fluidized bed for 120 minutes and then mixed with large and small balls at a rotation speed of 200-260 revolutions per minute. A coating is completely amorphous, the coating is compact, the bonding strength with a substrate is high, the hardness is high, the corrosion resistance is high, the thermal stability of the coating is good, and the coating has excellent comprehensive properties of wear resistance and corrosion resistance.

The invention belongs to the field of machining, and particularly relates to a method for precisely manufacturing an ultrathin-wall honeycomb ceramic carrier extrusion molding mold. The method comprises the following steps that firstly, the machining technology is used for manufacturing and machining a mold billet body to form the basis appearance of the extrusion molding mold, then the linear cutting technology is used for machining internal thin grooves of the mold, and the surfaces of the internal thin grooves are pre-ground by extruding pug out; the mold is immersed into a plating solution groove, the inner surface of the mold is plated with a protective coating, and the thickness of the coating is precisely controlled according to deposition time; finally, the mold is subjected to heat treatment under the protection of argon to form a nanocrystalline-noncrystalline composite microscopic structure; the extrusion molding mold which is high in size precision and hardness, abrasion resistant and corrosion resistant and has the self-lubricating property is obtained.