67results about How to "Excellent wear resistance and corrosion resistance" patented technology

The invention relates to a method for preparing a WC hard alloy wear resistance area on a petroleum drill rod surface. The method is characterized in that: the method comprises the following steps: (1) carrying out a pretreatment for the petroleum drill rod surface; (2) selecting alloy powder and adjusting an automatic powder feeding device; (3) cladding a bottoming alloy coating by a high power laser; (4) cladding spherical WC and Ni-Cr-B-Si mixed alloy powder by the high-power laser; (5) carrying out defectoscopy inspection after cladding. According to the present invention, the gradient coating method is adopted to prepare the WC hard alloy wear resistance area on the petroleum drill rod surface, the nickel-base alloy powder is adopted as the bottoming layer, the high wear resistance WC hard alloy powder is adopted as the working layer, such that the good binding strength of the working layer and the substrate is ensured in the case of meeting of the working layer characteristics, and the cracks can be prevented from expanding to the substrate during the using process, wherein the nickel-base alloy powder has good toughness and high strength, and has good metallurgy compatibility with the substrate.

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 method for preparing a WC (Wolfram Carbide) cemented carbide wearing layer on a surface of a petroleum drilling tool stabilizer through laser cladding. A tough bottoming transition layer which is in good metallurgical bonding with a matrix is formed on the surface of a shell in a fusion covering manner through rapid laser scanning by using a high-power laser, and mixture alloy powder of spherical WC and Ni-Cr-B-Si, which is wearing-resisting and excellent in corrosion resistance, is prepared on the surface of the bottoming alloy through laser cladding. The power, position, shape and the like of a laser beam of the method can be accurately controlled, selective area or even micro-area fusion covering is easy to realize, the dilution rate of coating components is low, the coating thickness can be accurately controlled, non-contact type treatment is adopted, and automatic control is easy to realize in the whole process; in addition, a laser cladding process is non-pollution on the environment, free of radiation and low in noise, has the characteristics that the productivity is high, the energy consumption is low, the cladding layer machining margin is small, the finished product rate is high, the comprehensive cost is low, and the like, and can be widely applied.

The invention relates to low alloy wearing resistance corrosion resistance steel which is suitably used in the ocean mud-sand wearing and corrosive environment, which is produced by the following steps: Mn-Si-Cr-Mo system non-carbide bainite alloy steel is taken as research basis, the carbon content and other alloy element contents are properly adjusted, elements of Al, Nb and rare earth contributing to improving the corrosion resistance of the alloy steel are added for modification, and the Mn-Si-Cr-Mo-Al system non-carbide bainite steel is formed by the progression quenching heat treatment process, so that the low alloy wearing resistance corrosion resistance steel is obtained. The steel has good obdurability, wearing resistant and corrosion resistant comprehensive performance and welding repair performances, and can be used to solve the problem of repairing worn blades of a centrifugal pump of a ship, and can also be applied to other ocean wearing resistance welding parts.

The invention discloses a heat exchanging component made of ceramic materials and a preparation method thereof, and more specifically relates to a ceramic material, a ceramic heat exchanging component, and preparation methods thereof, wherein the ceramic material has the properties of thermal shock property, corrosion resistance, wear resistance, low cost, high strength, high heat exchange efficiency, and the like. According to the invention, the ceramic material and the ceramic heat exchanging component are prepared through selecting 70-85% of silicon carbide, 0-5% of silicon nitride, 0-5% of theron, 0-5% of aluminum nitride, 0.9-3.2% of a fluxing agent, 10-20% of a binder and 0-2.5% of a forming additive; the heat exchanging component has good thermal conductivity and thermal shock properties, especially when the heat exchanging component is used for waste heat recovery, the temperature of tail gas discharged by oil and gas combustion can be reduced to a temperature below the water dew point, so that the sensible heat in the tail gas is fully recovered, and the latent heat of liquefaction of dry steam is recovered, therefore, the heat exchanging component made of ceramic materials and preparation method thereof disclosed by the invention provide a new technical route for a process for the effective governance of tail gas discharged by oil and gas combustion, and can be applied to a technical scheme of effectively preventing the formation of a haze weather caused by oil and gas combustion emissions.

The invention relates to a method for the laser cladding manufacturing or remanufacturing of a wear and corrosion resistant wind power generator shaft. The method is characterized in that the method comprises the following steps: 1, preprocessing the surface of a motor shaft; 2, selecting alloy powder having a wear abrasion matched with the performances of the motor shaft as a work layer, adjusting a gravity powder sending device, and pre-setting the powder; 3, cladding the wear resistant alloy powder through a high power laser; and 4, examining the obtained wind power generator shaft through ultrasonic flaw detection after cladding. A wear and corrosion resistant coat which can form metallurgic combination with a matrix on the wind power generator shaft through using a high power CO2 laser, so the corrosion, wear and oxidation resistance characteristics of the wind power generator shaft are substantially improved, use requirements of the wind power generator are reached, and the characteristics comprising high productivity, low energy consumption, small cladding layer working allowance, high yield, low comprehensive cost and the like are possessed.

The invention provides a production method of antibacterial blended yarn. Graphene nylon and small-scale polyester are directly mixed in the opening picking procedure, so that slipping of fiber due toaccidental stretching of the graphene nylon is reduced, the friction force and cohesive force between two kinds of fiber are enhanced, and the problem of difficulty in individual rolling due to smallcohesive force between graphene nylon fiber is effectively solved, meanwhile, a mixed roll obtained after mixing is carded by a carding machine with two-time carding functions, for the first carding,carding needle cloth and a carding technology are set on the basis of the property of the graphene nylon fiber, and for the second carding, the carding needle cloth and the carding technology are seton the basis of the property of the polyester fiber, so that two kinds of fiber are carded respectively, mixed sliver is prepared, then, the mixed sliver and polyester sliver are subjected to drawingand second mixing, accurate blending ratio control of two kinds of fiber is realized, and finally, uniform mixing of the two kinds of fiber and production of yarn with excellent anti-static, anti-ultraviolet, antibacterial, bacteriostatic, low-temperature infrared, wear-resistant, corrosion-resistant characteristics are realized.

The preparation process of intermetallic compound filament with powder core for arc spraying includes the following steps: mixing aluminum powder of granularity 38-44 micron and purity not lower than 99.5 % and iron (nickel ) powder of granularity 53-61 micron and purity not lower than 99.5 % in the atom ratio of 1 to 1; pressing the mixture in a hydraulic press into blank and painting the surface with one thin graphite layer; self-spreading reaction in a vacuum combustor to obtain loose intermetallic compound block; crushing, grinding, sieving to obtain 200-325 mesh granularity powder material and drying; and making Fe (Ni)-Al compound filament with powder core. The present invention has good spraying performance, good coating layer performance, high performance/cost ratio, wide use temperature range, simple technological process and low power consumption.

The invention discloses a 3D printing and electrolytic polishing combined machining system for a CoCrMo dental crown. The combined machining system comprises laser selective melting printing equipment and electrolytic polishing equipment, wherein the laser selective melting printing equipment comprises an optical transmission system and a vacuum chamber which can be incident by laser of the optical transmission system, a moulding platform which can be lifted is arranged in the vacuum chamber, a powder feeding device used for conveying printing powder is also arranged in the vacuum chamber, the powder feeding device is connected with a power laying device which can lay the printing powder on the powder feeding device onto the moulding platform; the electrolytic polishing equipment comprises an electrolytic tank which is used for placing a product and filled with electrolyte, a para-position electrode is fixed in the electrolytic tank, the para-position electrode is connected with the cathode of a power supply, and when electrolytic polishing is carried out on the product, the product is connected with the anode of the power supply. The combined machining system disclosed by the invention has the advantages that the laser selective melting printing equipment and the electrolytic polishing equipment are combined, surface roughness of the treated product meets post processing requirement, tissues are compact and controllable, mechanical properties can be configured, and anticorrosion and wear-resistant properties are excellent.

The invention discloses a preparation method of a corrosion-resistant and wear-resistant molybdenum-based amorphous coating for a boiler tube bundle. The method comprises the following steps: firstly, preparing molybdenum-based amorphous alloy powder by adopting an aerosol method, wherein the molybdenum-based amorphous alloy powder is formed by mixing the following raw materials in percentage by mass: 7.0-11.0% of Fe, 11.0-20.0% of Cr, 1.0-10.0% of Ni, 6.0-9.0% of Si, 0.5-2.0% of Al, 2.6-8.0% of C, 0.5-5.5% of W, 0-2% of Y and the balance of Mo and unavoidable impurities; secondly, preparing and obtaining the corrosion-resistant and wear-resistant molybdenum-based amorphous coating on the surface of the boiler tube bundle by adopting a plasma spraying technology. The molybdenum-based amorphous coating prepared by the invention has excellent corrosion resistance, wear resistance and high-temperature stability, and can protect the heat erosion surface of the boiler tube bundle better in an environment with the combined effect of heat corrosion and erosion, so that the service life of the boiler tube bundle is effectively prolonged.

The invention discloses a method for manufacturing a large profile universal rolling mill horizontal roller through laser. The method comprises the following steps: turning a graphite steel or spheroidal graphite cast iron material with high strength and toughness into a large profile universal rolling mill horizontal roller through laser substrate with a reserved certain laser cladding size and deoiling and derusting the large profile universal rolling mill horizontal roller under the room temperature; selecting nickel-based alloy powder with high wear resistance, high corrosion resistance and high metallurgical compatibility the substrate, adjusting an automatic powder feeding device and enabling alloy powder out of an automatic powder feeding head to just fall into a laser cladding tank; automatically feeding the alloy powder into the laser cladding tank by using a synchronous powder feeding device, feeding high-power focused laser beams and the automatic powder feeding head along an axial direction, rotating the large profile universal rolling mill horizontal roller according to a set rotation rate and forming a uniform and dense laser cladding layer on the external surface of the horizontal roller; and carrying out subsequent heat treatment by slowly cooling the horizontal roller after broadband laser cladding of the nickel-based alloy, fully wrapping the horizontal roller body by using heat preservation cotton, and distressing and annealing the horizontal roller under the room temperature.

The invention offers a kind of ball valve spool which includes external sphere (1) and interlock pore internal straight face (2) and the chrome oxide coat (3) covers on the external sphere (1) with non-rust steel spool and the interlock pore internal straight face (2). There sets up a transitional face at the conjoining location of the external sphere (1) with non-rust steel spool and the interlock pore internal straight face (2) and the included angle of the transitional face and the external sphere (1) at the conjoining location and the transition also covers the chrome oxide coat (3). It is a kind of ball valve spool with low cost, long life, credibility use and wearing and corrosion resistance.

The invention discloses novel 30Cr15MoY alloy steel powder for laser additive manufacturing or remanufacturing and a preparation method of the novel 30Cr15MoY alloy steel powder. The 30Cr15MoY alloy steel powder is prepared from 0.25-0.35% of C and 14.5-15.5% of Cr, has the characteristics of medium C content and high Cr content, and has the oxygen content of 0.05% or below, the sphericity degreeof 99% or above, the hollow sphere rate of 1% or below, the apparent density of 4.5-4.95g/cm<3> and the fluidity of 15-15.5s/50g. The average microhardness of a 30Cr15MoY alloy steel formed part sample prepared through laser additive manufacturing is 370-430 HV, the tensile strength is 1090-1300MPa, the yield strength is 800-980MPa, the elongation percentage is 7-14%, and high strength and toughness matching performance is achieved. The average microhardness of a 30Cr15MoY alloy steel coating sample prepared by laser remanufacturing is 650-750HV, the tensile strength is 1007-1438MPa, the wearrate is 6*10<-6>-8*10<-6>mm<3>/(N.m), the corrosion current density is 1.93*10<-7>-5.6*10<-7>A.cm<-2>, the corrosion voltage is -221 to -576mV, and the characteristics of wear-resistant and corrosion-resistant alloy samples are realized. The alloy steel powder disclosed by the invention has wide application prospects in the fields of laser additive manufacturing for preparing formed parts and laser remanufacturing for repairing worn, corroded and failed parts.

The invention belongs to the technical field of metal surface treatment, and discloses a method for rapid electrolytic-deposition of a coating on a surface of a magnesium alloy. According to the method, sand blasting equipment is adopted for carrying out sand blasting treatment on the surface of the magnesium alloy, then ultrasonic cleaning is carried out on the surface of the magnesium alloy, anda coating material is sprayed on the surface of the magnesium alloy which is subjected to the sand blasting treatment by adopting a cold spraying method; the working gas of the cold spraying is compressed air, wherein the pressure is 0.6 MPa to 0.8 MPa, the preheating temperature of the cold spraying gas is 400-600 DEG C, the powder feeding distance is 10 mm, the relative moving speed of a nozzleis 600-2000 mm/min, and a cold-sprayed copper-based coating is prepared; and the cold-sprayed copper-based coating is placed in an electroplating solution, electroplating parameters are set, and a composite coating of a copper base and an electroplating layer is prepared through electroplating. The composite coating is good in microstructure and stable in physical property, the bonding strength of the cold-sprayed coating and the base material is high, the thickness of the cold spraying layer and the base material is controllable, and the composite coating has excellent corrosion resistance and wear resistance. According to the method, the electroplating process of the magnesium alloy is simplified, and the pollution to the environment is reduced.

The invention discloses a wear-resistant and corrosion-resistant aluminum bronze brazing alloy. The brazing alloy provided by the invention is composed of the following components in percentage by mass: 10-11.5% of Al, 2.0-5.0% of Fe, 0.4-0.7% of Mn, 0.004-0.015% of Se, 0.02-0.5% of Ti and the balance of Cu. The aluminum bronze brazing alloy provided by the invention is high in strength and hardness and good in wear resistance and corrosion resistance.