1932 results about "Alloy coating" patented technology

A coated steel material excellent in corrosion resistance and a method of producing the same, wherein a coated steel material has on the surface of the steel sheet a Zn-alloy coating layer containing 1-10 wt % of Mg, 2-19 wt % of Al and 0.01-2 wt % of Si, where Mg and Al satisfy Mg (%)+Al (%)<=20%, the balance being Zn and unavoidable impurities, and has a coating layer structure of a Mg intermetallic compound or the like. As a base metal treatment, it is preferably provided with a Ni coating layer. The coated Zn-alloy coated steel sheet may have provided on the coating layer, as an intermediate layer, a chromate film layer, and, as an upper layer, an organic coating layer. The Zn-alloy coating layer may further contain one or more of 0.01-1 wt % of In, 0.01-1 wt % of Bi and 1-10 wt % of Sn. The coated steel material may be painted.

A laser cladding process of an exterior wear-resisting anti-corrosive alloy coating of a slide chair of a railway switch comprises processes as follows: firstly, the surface of the slide chair is pre-heated, which means the surface of the slide chair is degreased and de-rusted under room temperature; and the surface is cleaned up by alcohol; then alloy powder is prefabricated, which means iron-base, nickel-base or cobalt base alloy powders that are ready for cladding are preplaced on the processed surface of the slide chair, and a scraping straightedge provided with a rail is used for adjusting the pretreated metal powder so that the alloy powder can be distributed on the surface of the slide chair evenly and has proper thickness to meet the thick requirement of the coating after cladding; and finally, the slide chair is hardened by the laser cladding; the laser of CO2 gas is adopted; a numerical control machine is used as a working table and the surface of the slide chair is hardened by the laser cladding. The laser cladding process has the characteristics of no pollution, high production rate, low energy consumption, the little finishing allowance of cladding coating and low combined cost.

The invention relates to a high-entropy alloy powder material for supersonic spraying and a manufacturing method thereof. The high-entropy alloy powder material for the supersonic spraying can be obtained and is characterized in that the high-entropy alloy powder material comprises, by atomic percent, 10-20% of Al, 15-20% of Fe, 15-20% of Co, 15-20% of Ni, 15-20% of Cr and 15-20% of Cr, and total percent is 100%. The high-entropy alloy powder material is made by a gas atomization rapid solidification process. Particles of high-entropy alloy powder are spherical or ellipsoidal, a phase structure is composed of a solid solution phase with a simple face-centered cubic or body-centered cubic structure, ingredients and tissues are even, alloy solid solubility is high, and segregation is small. The manufacturing method of the high-entropy alloy powder material is controllable in powder size, good in mobility, low in oxygen content, small in environment pollution, high-entropy alloy coating with excellent combination property or a block high-entropy alloy material with more excellent performance can be obtained through a supersonic spraying process.

The invention discloses iron-based alloy powder for a high strength and toughness laser deposited coating in the technical field of alloy materials. The iron-based alloy powder comprises the following components: 0.60 to 1.00 percent of C, 0.35 to 0.70 percent of Si, 0.30 to 0.60 percent of Mn, 5.00 to 7.00 percent of Cr, 2.50 to 4.00 percent of Ni, 1.50 to 2.50 percent of Mo, 1.00 to 1.50 percent of W, 0.70 to 1.00 percent of V, 0.20 to 0.40 percent of Ti, 0.50 to 0.70 percent of B, 0.20 to 0.40 percent of Nb, 0.10 to 0.30 percent of Ce and the balance of Fe. The iron-based laser deposited alloy coating without cracks in large area can be obtained without pre-heating and post thermal treatment, the deposited alloy coating has high hardness which reaches 62 to 67HRC, and the yield strength reaches 1,700 to 2,000MPa.

The invention belongs to the field of material surface engineering and more particularly relates to a method for carrying out cladding on a high-hardness wear-resistant anti-corrosion nickel-based alloy material on a metal substrate E in a large area by applying a laser cladding technology, solving the problem of cracks generated in the laser cladding process of the high-hardness wear-resistant nickel-based alloy, in particular the cladding defects, such as cracks with the thickness of more than 1mm, pores and the like during large-area cladding. According to the invention, the high-hardness nickel-based alloy powder material is cladded on the surface of the metal substrate in the large area to form a high-hardness wear-resistant anti-corrosion nickel-based alloy coating by applying the laser cladding technology and adopting a scientific and reasonable process method. According to the method disclosed by the invention, stability and consistency of laser cladding are foundationally ensured, defects, such as cracks, pores, impurities can be prevented from generating, heat affected regions of the substrate are reduced, dilution rate is reduced, the high-wear-resistance anticorrosion nickel-based alloy coating with firm metallurgical bonding and fine and compact grains is obtained and has the hardness reaching 58-63HRC, and the service life of the processed workpiece can be prolonged by more than 1-2 times.

The invention provides a deep drawing hot-dipped al-zn steel plate/strip and a production method thereof. The deep drawing hot-dipped al-zn steel plate/strip comprises an IF steel substrate and an alloy coating and the chemical constituents of the substrate (wt percent) are that C is less than or equal to 0.01, Si is less than or equal to 0.12, Mn is less than or equal to 0.6, P is less than or equal to 0.1, S is less than or equal to 0.045, Ti is less than or equal to 0.3 and the allowance is Fe and inevitable impurities. The production method comprises substrate degreasing treatment, annealing treatment and hot dipping, and the annealing treatment is carried out in a continuous annealing furnace and protective gas contents in the annealing furnace are 10 to 60 percent. The yield strength of the steel plate/strip of the invention reaches 140 to 220 MPa, the tensile strength is 260 to 350 MPa and the elongation is more than 30 percent; the production method of the invention is simple in production process and strong in operability.

The invention provides a non-stick pan coating layer and a preparation method thereof. The coating layer comprises Al-Cu-Fe-Cr-B quasicrystalline alloy which has components as follows by the atomic percentage: 70-90 of Al, 1-15 of Cu, 5-15 of Fe, 5-15 of Cr, and the balance of B and unavoidable impurity. The method comprises the specific steps as follows: (1) smelting alloy materials with a spraying device at a temperature of 900-1100 DEG C to prepare alloy powder; (2) spraying the alloy coating layer on a boiler basal body with a plasma spraying device, with a main gas feed rate of 65 L/min, a secondary gas feed rate of 20-30 L/min, an arc current of 550-590A, an arc voltage of 45-60V, a powder delivering amount of 10-15 g/min, and a coating layer thickness of about 100-200 micro. At a cooking temperature, the invention has the advantages of stable chemical property, large rigidness, lower cost than Teflon or organic silicon, low surface friction coefficient, and the like.

The invention relates to high-entropy alloy powder containing amorphous nanocrystalline and a fabrication method thereof. A high-entropy alloy coating is composed of, by atomic percent, 14.3% of Al, 14.3% of Fe, 14.3% of Co, 14.3% of Ni, 14.3% of Cr, 14.3% of Mo and 14.2% of Si, and the total percentage is 100%. The fabrication method includes the following steps: S1, high-entropy alloy master alloy is fabricated through a medium-frequency induction smelting technique, wherein weighed metallic raw materials are put in a carborundum crucible in sequence and according to melting points from low to high, then the carborundum crucible is vacuumized until the pressure is lower than 6.0*10MPa; argon gas is inflated in the carborundum crucible, the metallic raw materials are melted under the condition that the pressure of the argon air is 3*10-2 Pa, the smelting current is 75A, the melting time is 25min, the alloy composition is segregated with the assistance of electromagnetic stirring, the alloy composition is poured into a magnesia framework after the alloy composition is melted completely, and the high-entropy alloy master alloy which is even in ingredients is obtained; S2, high-entropy alloy powdered materials are fabricated through gas atomization equipment. The fabrication method of the high-entropy alloy powder is used for fabricating the high-entropy alloy coating containing the amorphous nanocrystalline or bulk alloy materials of more superior performance.

The invention relates to a vapour generator for the deposition of a metal coating onto a substrate (7), preferably a steel strip, that comprises a vacuum chamber (6) in the form of a housing including a vapour deposition head or ejector (3) in tight communication via a supply duct (4) with at least one crucible (1) containing the coating metal in a liquid form and located outside the vacuum chamber (6), characterised in that the ejector (3) includes a longitudinal slot for the vapour outlet acting as a sonic throat and extending on the entire width of the substrate (7), a filtration medium or a charge loss member (3A) made of a sintered material being provided in the ejector immediately before said slot on the vapour path in order to equalise the flow speed of the vapour exiting the ejector (3) through the sonic throat.

The invention discloses iron-based amorphous powder for wear-resisting and corrosion-resisting coating and a preparation method thereof, and belongs to the technical field of surface engineering. Iron-based amorphous alloy coating adopts iron as a main component, and also comprises amorphous phase (in at least 30 percent by volume), and the representation formula of all elements in percentage by weight is FeaCrbNicSidBeMnfCgMohNbiCujCokRel. The powder is prepared through direct ball-milling mixing in proportion of all components according to the required weight ratio. The powder can be used for not only laser cladding but also thermal spraying technology, mixed powder is melt by high-energy density laser beams, an iron-based amorphous or amorphous composite cladding layer is formed on the outer surface of a matrix, the cladding layer has the characteristics of higher wear and collision resistance, the dilution rate is low, the wear-resisting and collision-resisting service lives of a petroleum drill rod, an air compressor screw rod, a roller, a water-cooled wall pipe and an economizer pipe are remarkably prolonged, the process is simpler, and the manufacturing cost is low.

The invention discloses a hydrophobic amorphous alloy coating which is prepared by taking Fe-based amorphous alloy powder as a raw material and adopting a supersonic flame spraying technique. The Fe-based amorphous alloy powder is composed of the following elements and inevitable impurities: 10.0-17.0% of Cr, 12.0-20.0% of Mo, 4.0-8.0% of B, 10.0-18.0% of C, 0.0-5.0% of Y and balance of Fe. The invention also discloses a preparation method of the coating. The amorphous alloy coating obtained by the invention not only has better lyophobic property, but also has better corrosion resistance, and high hardness and binding strength, thus having great application prospect on the facilities in the fields of underwater drag reduction, pollution prevention of ship shells, scale prevention on four walls of a boiler, hydraulic power and oil-gas field development and the like.

The invention discloses a laser cladding wear-resisting and heat fatigue-resisting alloy coating method for manufacturing a hot rolled seamless steel tube rolling mill retained mandrel, which is characterized by comprising the following steps: carrying out surface cleaning on greasy dirt and rustyscale of a retained mandrel; selecting cobalt-base alloy powder; adopting laser equipment and an automatic powder delivering device; carrying out laser cladding processing on the surface of the retained mandrel so as to form a 0.2-2mm coating with high-temperature oxidation resistance, heat fatigue resistance and heat abrasion resistance; and carrying out high temperature tempering processing on the retained mandrel after being subject to the laser cladding processing so as to decrease the coating after being subject to the laser cladding processing and the residual stress after the gene matrix is transformed. The laser cladding alloy coating of the invention is even and compact, has the characteristics of high production efficiency, low energy consumption, small machining allowance of a cladding layer, high yield and low comprehensive cost and the like.

The invention relates to a multi-component alloy plating material for coated steel products with high corrosion resistance and the manufacturing method thereof. The multi-component alloy is composed of Al, Si, Mg, Zn alloys and at least two rare earth elements, wherein the mass percentage of each component of the multi-component alloy is as follows: Al: 45-69 percent, Si: 0.2-3 percent, total amount of the at least two rare earth elements: 0.02-0.9 percent, Mg: 0.1-5 percent, and Zn in balance. The manufacturing method is also disclosed, which comprises compounding components at the given ratio, smelting in a smelting furnace at a smelting temperature of 750-800 DEG C, stirring in a non-contact manner, refining, slagging off, and casting to obtain an alloy ingot. The inventive coated steel product has high corrosion resistance, excellent fatigue resistance, and strong ability of binding with matrix metals; and is widely used in the industries of household electronic appliances, construction materials and automobiles.

A method of imparting high-temperature, degradation resistance to a component associated with an internal combustion engine involving applying a metal slurry comprising a Co-based metallic composition, a binder, and a solvent to a surface of the component, and sintering the Co-based metallic composition to form a substantially continuous Co-based alloy coating on the surface of the body. An internal combustion engine component comprising a metallic substrate and a Co-based metallic coating thereon which has a thickness between about 100 and about 1000 microns.

The invention discloses a composite gradient coating thermally sprayed on the surface of a screw rod of an injecting and molding machine and a method for preparing the same. The composite gradient coating is characterized in that a metal ceramic hard alloy coating on the surface of the matrix of the screw rod is used as a transitional layer, and a surface polishing and processing alloy layer is thermally sprayed on the surface of the transitional layer. Compared with the prior coating on the surface of the screw rod, the composite gradient coating has excellent surface polishing and processing performance, matrix combination strength, friction and wear resistance, high temperature resistance and corrosion resistance, can greatly improve the use performance of the screw rod and significantly prolong the service life of the screw rod, can replace the widely-used nitriding process, spraying-welding process and other screw rod surface processing process and has good application prospect and economic benefit.

The invention discloses a method for agglomerating and granulizing superfine nano WC-Co composite powder, which belongs to the technical field of metal ceramic coatings and comprises the following steps of: mixing the superfine nano WC-Co composite powder with polyvinyl alcohol, polyethylene glycol and deionized water according to a certain ratio to prepare a slurry; atomizing and granulizing the slurry of the WC-Co composite powder with centrifugal atomizing drying equipment, wherein the inlet temperature of the dryer is 140-200 DEG C and the rotation frequency of an atomizing tray is 200-300Hz; and performing heat treatment on the atomized and dried powder with a vacuum heat treating furnace, wherein the temperature of heat treatment is 950-1,200 DEG C, the time for heat preservation is 1-2 hours and argon is maintained in the furnace. By the method, agglomerated granules of which the average particle diameter and the granulometric distribution meet the requests of the thermal spraying technique can be obtained. The sphericility of the agglomerated granules is good, so the agglomerated granules can be used for preparing hard alloy coating with a superfine nano structure and good combination property.

Enhancing wear and corrosion resistance of an industrial component by depositing a Ni-based alloy coating having a thickness of at least about 50 microns onto a surface of the industrial component by high velocity oxyfuel propulsion of a Ni-based alloy powder containing a) Cr, b) from about 15 to about 25 wt % Mo, c) no more than about 1 wt % Fe, and d) no more than about 1 wt % elements having an atomic number greater than 42. A Ni-based alloy powder for HVOF deposition containing a) Cr, b) from about 15 to about 25 wt % Mo, c) no more than about 1 wt % Fe, and d) no more than about 1 wt % elements having an atomic number greater than 42. A Ni-based coating on an industrial component having enhanced corrosion and wear resistance.

A preparation method of a nickel base alloy coating on a boiler water wall is characterized in that a compound coating is formed on the surface of a tube panel of the boiler water wall and adopts a double-layer compound structure coating which is formed by coating a bonding base layer on the tube panel of the boiler water wall by supersonic-speed electric arc spraying equipment and coating a nickel base alloy coating resistant to the high-temperature corrosion and abrasion on the combined base layer. According to the preparation method of the nickel base alloy coating on the boiler water wall, the service life of the boiler water wall can be greatly prolonged, the process is simple, the production cost is low, the controllability is good, the influence on a substrate is small, the bonding strength of the coating is high, the service life of the boiler water wall can be effectively prolonged, and the boiler water wall has excellent corrosion and abrasion resistance.

The invention discloses a marine-corrosion/hot-corrosion-resistant composite coating and a preparation method thereof, belonging to the technical field of metal surface protection. A novel FeCrAlRe hot-corrosion-resistant powder core wire material is prepared by coating mixed powder, containing Cr powder, Al powder and the like, on a carbon steel band. A ZnAlMgRe powder core wire material is prepared by coating mixed powder, containing Al, Mg, Zn and Re, on a Zn-base alloy band. The preparation method of the composite coating comprises the following steps: spraying the FeCrAlRe powder core wire material by using a high-speed arc spraying device to form an alloy coating on a pretreated steel base surface, and spraying a ZnAlMgRe coating to form a double-layer composite structure protective coating. The prepared coating can resist hot corrosion, and has excellent corrosion resistance in a marine high-humidity high-salt-mist environment.

The invention discloses a plasma cladding in-situ synthesized TiB2-TiC-TiN reinforced high-entropy alloy coating material and a preparation method thereof. The coating material comprises the following components according to atomic percentage: 17-19 percent of Co, 17-19 percent of Cr, 17-19 percent of Fe, 17-19 percent of Ni, 17-19 percent of Mn, 3-10 percent of Ti, 0.5-2 percent of B4C and 1.5-3 percent of BN. The preparation method comprises the steps as follows: (a), pre-treating a substrate; (b), preparing high-entropy alloy coating raw materials; (c), mixing powder; (d), preparing the high-entropy alloy by adopting plasma cladding equipment. The organization structure of the high-entropy alloy coating comprises an FCC phase, a BCC phase and a TiB2-TiC-TiN ternary ceramic phase, and favorable metallurgy bonding between a coating and the substrate is realized; the average Vickers hardness reaches 1,104 Hv.According to the invention, on the basis of the conventional high-entropy alloy coating,a TiB2-TiC-TiN reinforced phase is synthesized in-situ,the strength, hardness and the toughness of the coating are further improved, the match between the hardness and the toughness is achieved, and the potentiality of the high-entropy alloy coating is brought into play to the greatest extent. Moreover, the preparation method is reasonable in working procedures, simple and convenient to implement, is used for preparing durable antisepsis or abrasion proof coatings, and can remarkably prolong the service life of machinery parts.

The invention relates to a composition design, a preparation method and application of a hot spraying zinc-aluminum-magnesium-rare earth multi-element alloy material, and belongs to the technical field of anti-corrosive metal anticorrosion. The zinc-aluminum-magnesium-rare earth multi-element alloy material comprises the following components in percentage by weight: 5.0 to 15.0 percent of aluminum, 0.1 to 1.0 percent of magnesium, 0.1 to 0.5 percent of rare earth (lanthanum and cerium), less than 1.0 percent of impurities and the balance of zinc. The preparation method comprises the following steps of: heating to smelt zinc ingots and aluminum ingots in an alloy smelting furnace, adding an intermediate alloy, stirring until the melt is clear, standing, slagging off, and casting; and performing homogenizing annealing on cast ingots, extruding to obtain zinc-aluminum-magnesium-rare earth multi-element alloy blank thick wires, and performing homogenizing annealing, drawing, diameter reducing, and wire surface cleaning to obtain zinc-aluminum-magnesium-rare earth multi-element alloy wire products. A corrosion resistant multi-element alloy coating prepared from the alloy wires prepared by the method through a hot spraying technology has the corrosion resistance obviously higher than that of a pure zinc coating, is suitable for protection construction of steel structural parts, and has important significance and wide application prospect for anti-corrosion engineering of water conservancy and hydropower, ports, bridges, ships and the like.

A method for manufacturing a brazed part is disclosed that includes coating a substrate surface to be joined by first cold spraying a braze filler metal powder upon the surface to clean the surface followed by further spray the powder to form a coating layer of a braze alloy upon the surface. The coated surface is assembled with another surface to be joined and brazed together to form the brazed part. The substrate and braze alloy may be nickel-based super alloy materials.