47results about How to "High amorphous content" patented technology

A catalyst for the fuel battery with proton exchange membrane is prepared through adding catalyst precursor to carbon powder suspension, adding alkali to regulate pH value to 4-9, low-temp vacuum drying to obtain component A, adding solid reducing agent to the A, grinding until solid-phase reaction to adsorb metal salt microparticles to carbon carrier, alkali washing, pickling, washing in water and drying to obtain powdered catalyst carried by carbon powder.

The invention provides an iron-based amorphous-nanocrystal composite coating and a preparation method thereof. The preparation method of the iron-based amorphous-nanocrystal composite coating comprises the step that smelted alloy comprising 44-45 wt% of Fe, 8-9 wt% of Co, 10-15 wt% of Cr, 25-27 wt% of Mo, 3-5 wt% of C, 1-2 wt% of B and 1-3 wt% of Y is smeared onto a base material, so that the composite coating is obtained. According to the preparation method provided by the invention, the smelted alloy is adopted in the fusion cladding process, the process of smelting high-purity amorphous self-melting powder of conventional raw materials in a laser way is omitted, holes formed by generation of the amorphous self-melting powder are avoided accordingly, it is ensured that the composite coating of a compact structure is obtained, and the corrosion resistance of the composite coating is improved; and the amorphous forming ability of the adopted smelted alloy is high, and the amorphous content of the coating obtained through fusion cladding is high.

The invention discloses a marine environmental corrosion-resistant cored wire for an aluminium-based amorphous nanocrystalline coating. The marine environmental corrosion-resistant cored wire for the aluminium-based amorphous nanocrystalline coating is characterized in that skin of the wire is an aluminium strip, the filling rate of the wire is 34-38%, and the cored wire comprises the following elements by atomic percent: 10-15at% of Si, 3-8at% of Ni, 8-14at% of Fe and the balance of Al. A preparation method of the marine environmental corrosion-resistant cored wire for the aluminium-based amorphous nanocrystalline coating comprises the following steps: weighing and burdening in composition percentage of the elements of the cored wire, putting the elements into a powder mixing machine, and mixing; binding the aluminium strip into a U shape, and adding the mixed powder with the powder adding coefficient of 34-38% into the U-shaped groove; sealing the U-shaped groove, and coating the powder inside; gradually drawing and reducing by virtue of a wire drawing die, wherein the diameter of the wire is 2.0mm finally. The marine environmental corrosion-resistant cored wire for the aluminium-based amorphous nanocrystalline coating has strong amorphous forming capability, the aluminium-based amorphous nanocrystalline coating prepared by adopting a high-speed electric arc spraying technology has excellent corrosion resistance, and long effective corrosion prevention and service life of a steel structure part in the coastal and paralic environments can be obviously prolonged.

The invention discloses a method used rod plasma spraying to manufacture iron base amorphous alloy. Ingot iron, industry iron boron and silicon iron are smelted to master alloy in proportion in induction furnace. Then it is formed into crystalline state alloy rod with 2mm-4mm diameter. The crystalline state alloy rod is sprayed to cooled copper stick to form iron base amorphous alloy by aerospace plasma spraying method. The invention overcomes the technique bias that the amorphous alloy powder can only be used in the manufacturing course. The formed amorphous alloy material has high amorphous content, hardness, good wearing qualities, and magnetic property.

The invention relates to a preparation method of an iron-based amorphous coating. According to the situations that a stainless steel plate is poor in wear resistance and short in service life, the iron-based amorphous coating is cladded on the surface of stainless steel, so that the surface hardness, wear resistance and amorphous content of the stainless steel plate are improved. The hardness of the iron-based amorphous coating obtained after laser remelting reaches 750 HV, and the amorphous content of the amorphous coating reaches 54%. Laser remelting can be used for repairing cracks, holes and unfused solid particles on the surface of the coating, so that the coating dilution rate is reduced, the coating quality is improved, and the amorphous ratio is improved.

The invention discloses an ultrasonic flame painting system and a manufacturing method of a high-quality iron-based amorphous coating. The ultrasonic flame painting system comprises an ultrasonic flame spray gun and air cooling equipment; the air cooling equipment comprises a base, a cooling table and a storage cylinder; the cooling table is a hollow structure which is internally provided with a cavity; multiple air outlets which communicate with the internal cavity of the cooling table are formed in the cooling table; the storage cylinder communicates with the internal cavity of the cooling table; a solenoid valve is arranged on an air inlet pipe; a temperature sensor is further arranged on the cooling table; the temperature sensor is used for monitoring painting temperature; when the high-quality iron-based amorphous coating is manufactured, temperature of a base plate in the painting process is monitored by the temperature sensor in real time; the flow of cooling air entering the cooling table is controlled by the solenoid valve, so that the temperature of the base plate is precisely adjusted during the painting process; the amorphous coating with high density and high amorphouscontent is obtained; painting efficiency is greatly improved; and the high-quality iron-based amorphous coating can be effectively manufactured.

The invention provides a corrosion-resistant coating reinforced drill rod. The corrosion-resistant coating reinforced drill rod comprises a drill rod base body, a Ni-Al layer which is arranged on thesurface of the drill rod base body, and a Fe-based amorphous alloy coating arranged on the surface of the Ni-Al layer, wherein the Fe-based amorphous alloy coating comprises the following components of 13.0wt%-15.0wt% of Cr, 25.0wt%-27.0wt% of Mo, 1.0wt%-2.0wt% of B, 3.0wt%-5.0wt% of Y, 3.0wt%-5.0wt% of C and the balance Fe. According to the corrosion-resistant coating reinforced drill rod, the Fe-based amorphous alloy coating with the above components is adopted, and the amorphous alloy coating has no defects such as crystal boundary dislocation in common alloy. The Cr element in the corrosion-resistant coating reinforced drill rod has good pitting resistance, so that the corrosion resistance of the whole material is good. The invention also provides a preparation method of the corrosion-resistant coating reinforced drill rod.

The invention provides a manufacturing method of a crack-free laser cladding amorphous coating. The manufacturing method comprises the following steps that (1) a matrix is molten in advance accordingto first preset technological parameters and is kept at the first preset temperature; (2) a coating material is arranged on the surface of the alloy matrix in a laser cladding mode according to secondpreset technological parameters, so that a cladding layer is formed; and (3) after the surface temperature of the cladding layer is reduced to be equal to the first preset temperature, the alloy matrix which is subjected to cladding is molten again according to third preset technological parameters and is cooled. By the adoption of the manufacturing method, the laser cladding amorphous coating which is completely free of cracks can be manufactured, the crack condition is improved, the amorphous content and the microhardness of the laser cladding layer can also be increased, the amorphous content in the laser cladding amorphous coating is larger than 40%, and the average micro vickers hardness is 807.4HV0.1. The manufacturing method is low in cost, all the technological processes can be accomplished on one laser cladding facility, and therefore operation can be easier, manufacture can be more efficient, and the application range can be broader.

The invention discloses a method for preparing a zirconium-based amorphous / nanocrystalline composite coating on the surface of a zirconium alloy. The method comprises the following steps that (1) firstly, a substrate is pretreated, wherein the surface is ground so as to remove an oxide layer and impurities on the surface, and the surface is cleaned and dried by using alcohol or acetone; (2) a preset powder method is adopted for carrying out cladding, the laser power ranges from 1200 W to 2000 W, the spot diameter is 4 mm, the scanning speed ranges from 4 mm / s to 6 mm / s, and the cladding time ranges from 3 s to 5 s; and (3) the coating obtained after cladding is subjected to laser remelting treatment, wherein the laser power ranges from 800 W to 1500 W, the spot diameter is 4 mm, the scanning speed ranges from 8 mm / s to 12 mm / s, and the cladding time ranges from 1 s to 2 s. The preparation method is advanced in process and accurate in technical parameters, and is an advanced preparation method of the zirconium-based amorphous coating.

The invention discloses a method for preparing an amorphous composite coating through laser cladding, and belongs to the technical field of alloy surface coating modification. The method comprises thesteps that a titanium alloy is pretreated; and Zr powder, Cu powder, Al powder and Ni powder are mixed evenly through ball grinding according to the atom ratio being 55:35:10:5 to be prepared into Zr55Cu35Al10Ni5 mixed powder; and the evenly-mixed powder and nanometer SiC powder are mixed evenly according to the mass percentage being (99-99.5):(0.5-1) to be prepared into cladding powder. The surface of a titanium alloy substrate and preset powder are molten together through laser cladding, and the coating is prepared on the titanium alloy through high-energy laser beams. By means of the method, the nanometer SiC enhanced amorphous composite coating is prepared on the surface of the titanium alloy, and therefore the hardness and wear resistance of the surface of the matrix material are improved.

The invention discloses an amorphous coating, a matrix comprising the same and a preparation process of the matrix comprising the amorphous coating and belongs to the technical field of coating preparation. The chemical components of the coating include, by mass, 40-60% of Ni, 20-40% of Zr, 2-15% of Zb and 1-8% of Si. A metal intermediate layer is arranged between the matrix and the coating and can improve the bonding strength between the coating and the matrix. The process comprises the following steps of 1, preparing the matrix and conducting pretreatment; 2, weighing metal powder for the intermediate layer and metal powder for the coating and conducting pretreatment; 3, preparing the metal intermediate layer; and 4, preparing the coating. Through the reasonable process design, the amorphous phase content and the bonding strength of the coating can be effectively improved when the large-area amorphous coating is prepared, and the comprehensive performance of the coating is improved.

The invention discloses an iron-based amorphous nanocrystalline composite coating and a preparation method of preparing the iron-based amorphous nanocrystalline composite coating by adopting a plasma surfacing method. Alloy powder which is prepared according to the specified proportion is subjected to surfacing on the surface of a base material by adopting a plasma surfacing machine to form an alloy coating, wherein the technical parameters comprise: the welding voltage is 25-30 V, the welding current is 140-190 A, the welding speed is 35-40 mm / min, the shielding gas flow is 10-12 L / min, the powder feed speed is 15-25 g / min and the amplitude of swing is 20-30 mm. when the plasma surfacing ends, after the coating is naturally cooled to the room temperature, the preparation of the iron-based amorphous nanocrystalline composite coating is completed. The iron-based amorphous nanocrystalline composite coating which is prepared by the plasma surfacing method is high in rigidity and good in wear-resisting property and can be widely applied to manufacturing and repair of metallurgical machinery and petrochemical engineering apparatuses. In addition, the coating prepared by the plasma surfacing method has the advantages that the technology is simple; the operation is simple and easy; no preheating before welding and no slow cooling after welding are needed; after surfacing, the coating has no cracks and no peeling, and the forming of the coating is excellent.

The invention belongs to the field of an amorphous coating, in particular to a method for preparing nickel-base amorphous alloy coating. The method comprises the steps: first, mechanically ball-milling and drying molten allow powder which is prepared from, by mass, 2-5% of gadolinium element powder, 3-5% of niobium element powder, 5-15% of boron element powder, 12-15% of silicon element powder, 31-35% of iron element powder and 30-44% of Ni element powder; then, utilizing the synchronous powder feeding and laser cladding technology, entering into a molten metal bath under laser radiation under the protection of argon gas, and forming the nickel-base amorphous alloy cladding coating. The technological parameters of the laser cladding technology are as follows: the laser power is 12-14kW, the spot diameter is 1-4mm, the scanning speed is 7-10m / min, the flow of protection argon is 20-30L / min, and the powder feeding rate is 15-25g / min. the preparation method has the advantages of high efficiency, low energy consumption, controllable particle size and flexible component adjustment, and the formed amorphous coating has high hardness.

The invention discloses a preparation method of an amorphous alloy coating used for radiation protection of a nuclear waste container. The preparation method comprises the following steps that Al2O3 powder and Fe-Cr-C-Si-Gd-B iron-based amorphous alloy powder are mixed through a high-speed mixer; high-power ultrasonic waves are used for carrying out ultrasonic screening on mixed powder; Al2O3 andiron-based amorphous alloy composite powder is dried; and the composite powder is directly sprayed to the surface of the nuclear waste container through a high velocity oxy-fuel method. By means of the preparation method of the amorphous alloy coating used for radiation protection of the nuclear waste container, the bonding force, density, amorphous content and wear resistance of the Fe-Cr-C-Si-Gd-B iron-based amorphous alloy composite coating and the nuclear reactor waste container are improved, the porosity of the amorphous alloy composite coating is reduced, and meanwhile the coating has excellent neutron absorbing ability.

The invention discloses a Ti-Al-based amorphous alloy powder material, a preparation method thereof and the application thereof. The Ti-Al-based amorphous alloy material comprises, by weight, 60-65 parts of titanium, 30-35 parts of aluminium and 1-2 parts of boron. The Ti-Al-based amorphous alloy material further comprises, by weight, 0-6 parts of tungsten, 0-2 parts of silicon and / or 0-3 parts ofvanadium. The alloy powder particles are spherical, the particle size is 15-50 microns, and the oxygen content is 0. 09%-0.14%. The preparation method of the Ti-Al-based amorphous alloy material comprises the following steps of (1), selecting the alloy material powder with the corresponding content, putting the selected alloy material powder into a powder mixer, and uniformly mixing the selectedalloy material powder; and (2), carrying out mechanical alloying on the uniformly-mixed alloy powder material by using a ball milling method so as to prepare a finished product of the alloy material.The Ti-Al-based amorphous alloy powder material is used for a metal 3D printer to 3D print parts.

The invention provides a preparation method of a crystalline-amorphous aluminum-based composite material. The preparation method comprises the following steps: (1) respectively weighing high-purity elemental Al, Ni , Co, Y and La metals according to a mass ratio of 86:6.75:2.25:3.25:1.75, mixing the elemental metals, and melting the obtained mixture multiple times to obtain an alloy master ingot Al86Ni6.75Co2.25Y3.25La1.75, wherein mass fraction of every elemental metal is equal to or more than 99.99 wt.%; and (2) carrying out arc melting on the alloy master ingot in an argon atmosphere, and rapidly carrying out copper mold suction casting with a water-cooled copper mold as a cooling medium in order to obtain the crystalline-amorphous aluminum-based composite material. The cooling speed ofa suction molding process matched with the copper mold is 10<3> to 10<6> K / s, and the cooling rate of the upper part of the copper mold is lower than that of the lower part. The performances of the material can be controlled by the method, and the prepared composite material has excellent mechanical properties, has a room temperature compressive strength of 625-865 MPa, a breaking strength of 650-1000 MPa and a compressive plastic strain of 1.3-3.3%.

The invention discloses a high-speed electric-arc-spraying liquid metal ceramic coating and a preparation method thereof. The liquid metal ceramic coating is prepared from the following raw materials in parts by weight: 60-80 parts of boron iron, 3-6 parts of silicon iron, 2-5 parts of buckle powder, 3-5 parts of aluminium powder, 5-20 parts of graphite, 5-10 parts of chromium powder and 5-15 parts of an arc stabilizing agent. The liquid metal ceramic coating prepared by mixing tubular powder cores is high in amorphous content (more than or equal to 85%) and hardness (HV0.1 is more than or equal to 10000), wear resistance, corrosion resistance and the like; and compared with the prior art, the liquid metal ceramic coating has the characteristics of low cost, high spraying efficiency, good deposition efficiency, high deposition quality, good arc stability and the like.

The invention discloses an in-situ construction method of a tailing covering layer. The in-situ construction method comprises the following steps: uniformly mixing original tailings and a compoundingagent according to a certain proportion to prepare a covering layer substance, covering a tailing pond with the prepared covering layer substance, carrying out mixing, and applying alkali liquor to obtain a solidified tailing covering layer. The tailing covering layer provided by the invention has the characteristics of controlled dissolution of solidified heavy metals and leaching resistance, andthe materials are cheap and are easy to obtain. Compared with a covering layer of a conventional tailing pond, the tailing covering layer constructed by the method has the advantages of stability, energy and resource conservation, and environment friendliness.

The invention discloses a high-entropy amorphous alloy coating and a preparation method thereof. The high-entropy amorphous alloy powder is prepared from the raw materials in percentage by weight: 28-32% of nickel, 28-32% of cobalt, 2-6% of silicon, 2-6% of boron, and the balance of iron. The preparation method comprises the following steps that matrix pretreatment is conducted; the alloy powder is prepared; and the alloy powder is laid on the pretreated matrix, a semiconductor wide band laser is used for laser cladding to obtain the high-entropy amorphous alloy coating, wherein the size of alaser focusing spot of the semiconductor wide band laser is 14mm*1.5mm. The surface of the high-entropy amorphous alloy coating is smooth, flat and free of cracks, and the interior of the high-entropyamorphous alloy coating is uniform and dense and is free of obvious hole defects. The micro-Vickers hardness of the coating is more than 400HV0.1, the highest is 729.5HV0.1, and the average is 582.9HV0.1. The coating phase structure is simple FCC phase and BCC phase. The amorphous content can be up to 64. 3%.

The invention discloses a powder core wire for preparing an Al-Ni-Nb-Co amorphous coating through a high-speed electric arc spraying technology. The powder core wire is characterized in that a sheath of the powder core wire is made of a pure aluminum strap, the mass percentage of the powder core wire ranges from 34% to 38%, and components of a powder core comprise, by mass, 12%-16% of Ni, 12%-16% of Nb and 6%-10% of Co. The powder core wire has a high amorphous forming ability, the amorphous content in the coating prepared through the high-speed electric arc spraying technology is high, and the powder core wire has anticorrosion and wear-resisting dual functions, and can provide a firm material guarantee for surface protection of steel and light-alloy parts.

The invention discloses an iron-based amorphous nanocrystalline composite coating with high amorphous content and a preparation method of preparing the iron-based amorphous nanocrystalline composite coating with high amorphous content by adopting a plasma surfacing method. Alloy powder which is prepared according to the specified proportion is subjected to surfacing on the surface of a base material by adopting a plasma surfacing machine to form an alloy coating, wherein the technical parameters comprise: the welding voltage is 25-30 V, the welding current is 140-190 A, the welding speed is 35-40 mm / min, the shielding gas flow is 10-12 L / min, the powder feed speed is 15-25 g / min and the amplitude of swing is 20-30 mm. when the plasma surfacing ends, after the coating is naturally cooled to the room temperature, the preparation of the iron-based amorphous nanocrystalline composite coating with high amorphous content is completed. The iron-based amorphous nanocrystalline composite coating with high amorphous content, which is prepared by the plasma surfacing method, is high in rigidity and good in wear-resisting property and can be widely applied to manufacturing and repair of metallurgical machinery and petrochemical engineering apparatuses. In addition, the coating prepared by the plasma surfacing method has the advantages that the technology is simple; the operation is simple and easy; no preheating before welding and no slow cooling after welding are needed; after surfacing, the coating has no cracks and no peeling, and the forming of the coating is excellent.

The invention discloses a marine environmental corrosion-resistant cored wire for an aluminium-based amorphous nanocrystalline coating. The marine environmental corrosion-resistant cored wire for the aluminium-based amorphous nanocrystalline coating is characterized in that skin of the wire is an aluminium strip, the filling rate of the wire is 34-38%, and the cored wire comprises the following elements by atomic percent: 10-15at% of Si, 3-8at% of Ni, 8-14at% of Fe and the balance of Al. A preparation method of the marine environmental corrosion-resistant cored wire for the aluminium-based amorphous nanocrystalline coating comprises the following steps: weighing and burdening in composition percentage of the elements of the cored wire, putting the elements into a powder mixing machine, and mixing; binding the aluminium strip into a U shape, and adding the mixed powder with the powder adding coefficient of 34-38% into the U-shaped groove; sealing the U-shaped groove, and coating the powder inside; gradually drawing and reducing by virtue of a wire drawing die, wherein the diameter of the wire is 2.0mm finally. The marine environmental corrosion-resistant cored wire for the aluminium-based amorphous nanocrystalline coating has strong amorphous forming capability, the aluminium-based amorphous nanocrystalline coating prepared by adopting a high-speed electric arc spraying technology has excellent corrosion resistance, and long effective corrosion prevention and service life of a steel structure part in the coastal and paralic environments can be obviously prolonged.

The invention discloses a process for high-efficiently laser three-dimensional (3D) printing an Fe-based amorphous component, and belongs to the technical field of additive manufacturing of alloys. The process for high-efficiently laser 3D printing the Fe-based amorphous component comprises the following steps of printing crystal powder with the particle size being 20 mum to 200mum into a crystalcomponent by utilizing a coaxial powder feeding laser 3D printing method under the conditions that the laser power is 500W to 1000W, the scanning speed is 600mm / min to 3000mm / min, the laser spot diameter is 2mm to 4mm, the printing thickness is 2mm to 50mm, and the printing environment oxygen content is lower than 10ppm; and after cooling the crystal component for 30min to 120min, adopting Fe-based amorphous powder with the particle size being 20 mum to 200mum for printing Fe-based amorphous on the surface of the printed crystal under the parameters that the laser power is 800W to 1500W, the scanning speed is 600mm / min to 3000mm / min, and the printing layer thickness is 0.3mm to 2mm, and finally obtaining the Fe-based amorphous component. The process for high-efficiently laser 3D printing the Fe-based amorphous component provided by the invention overcomes the defects of simple amorphous molding shape, low amorphous component production efficiency and cracks, and solves the problem of high amorphous powder cost.

The invention discloses an aluminum alloy amorphous powder material, a preparation method, application and a coating preparation method. The aluminum alloy amorphous powder material comprises component elements including Al, Ni, La, Co, Y and Gd. The preparation method of the aluminum alloy amorphous powder material comprises the following steps of smelting the aluminum alloy amorphous powder material; conducting gas atomization on molten metal obtained through smelting, and obtaining aluminum alloy amorphous powder, wherein atomization conditions are that the temperature ranges from 1200 DEGC to 1400 DEG C, inert gas is used for protection, and the protective gas pressure ranges from 10 kg to 50 kg; and after the atomized aluminum alloy amorphous powder is cooled, collecting and screening the powder to obtain the aluminum alloy amorphous powder material with the particle size distribution being 10-30 microns. The amorphous content of the aluminum alloy amorphous powder material is upto 90% or above, and the corrosion resistance, wear resistance and fatigue resistance of a metal component are remarkably improved when the aluminum alloy amorphous powder material is used as a coating of the metal component.

The invention discloses an amorphous coating preparation method based on laser cladding and pulsed electron beam irradiation. The preparation method comprises the following steps of firstly, preparing a ZrNiAlCu coating on the surface of a matrix through a laser cladding technology, and then carrying out purification treatment on the surface of the coating by using pulsed electron beam HCPEB irradiation. According to the method, the amorphous content of the alloy coating is increased by utilizing the characteristics of energy concentration, high efficiency, easiness in control and the like of HCPEB irradiation treatment. The surface densification of the laser cladding coating and the homogenization of the cladding alloy are achieved, so that the wear resistance and corrosion resistance are improved. According to the method, ultrafine and even nano-scale refinement of crystal grains on the surface layer of the cladding layer can be further achieved, so that the wear resistance and corrosion resistance of the cladding layer are improved.

The invention provides a preparation method of an iron-based amorphous coating and further provides the iron-based amorphous coating. The preparation method comprises the steps that a powder core wireis sprayed on the surface of a substrate through a high-speed electric arc, and thus the iron-based amorphous coating is obtained; and the powder core wire comprises a powder core, and the powder core comprises the components of, by weight, 15-25% of Cr, 5-15% of Mo, 5-15% of Al, 1-5% of B, 1-5% of Si and the balance Fe. According to the preparation method, the iron-based amorphous coating is obtained by adopting the method that the powder core wire is sprayed through the high-speed electric arc; the adopted powder core wire comprises the specific components, the amorphous coating obtained byspraying the powder core wire with the components through the electric arc is high in amorphous content and good in hardness and corrosion-resistant performance, and the powder core wire is low in raw material cost and does not contain precious metal elements; and the preparation cost is low, and the iron-based amorphous coating can be applied to the field of techniques of corrosion resistance, abrasion resistance and the like on a large scale.

The invention discloses a cored wire for preparing an Al-Ni-Zr-Cr amorphous coating by utilizing a high velocity arc spraying technology. The cored wire is characterized in that the skin of the cored wire is a pure aluminum belt, wherein the mass percentage of a core accounting for the wire is 32 to 40 percent; the core is prepared from the following components in percentage by mass: 16 to 24 percent of Ni, 8 to 14 percent of Zr and 0 to 8 percent of Cr. The preparation method comprises the following steps: firstly, rolling the pure aluminum belt into a U shape; secondly, weighing accessories according to the mass percentage of all the components of the core, and putting the weighed powder into a powder mixing machine for mixing; thirdly, adding uniformly-mixed powder into a U-shaped aluminum belt groove according to a powder adding coefficient of 32 to 40 percent, sealing the U-shaped aluminum belt groove and enabling the powder to be accommodated in the U-shaped aluminum belt groove; finally, reducing the diameter by multiple paths of wire drawing until the cored wire with the diameter of 2.0mm is obtained. The cored wire has relatively high amorphous forming ability; the coating prepared by adopting the high velocity arc spraying technology has the advantages of relatively high content, relatively high hardness and double functions of corrosion resistance and wear resistance, and can provide effective surface protection for steel structural components and light alloy parts of marine equipment.

The invention discloses a composite wave-absorbing material suitable for marine environment and a preparation method thereof as well as application. The material comprises 85%-95% of iron-based amorphous materials and 5%-15% of hexagonal BCN ceramic, wherein the iron-based amorphous materials comprise the following components of, in percentage by weight, 27% of Cr, 4% of B, 4% of Si, 5% of Cu, 7%of Ni, 8% of Mo, and the balance Fe; the hexagonal BCN is prepared by a pyrolysis method to form a single-layer or few-layer structure hexagonal BCN, the preparation method comprises the following steps that firstly, raw materials for preparing the iron-based amorphous materials are added into a vacuum air atomization furnace for smelting, atomizing and powder screening is conducted, then the iron-based amorphous powder is fully mixed with the hexagonal BCN to obtain the powdery composite wave-absorbing material; and the composite wave-absorbing material is prepared by adopting a supersonic flame spraying technology to obtain the wave-absorbing coating suitable for the marine environment. According to the composite wave-absorbing material, a wave-absorbing coating can obtain good wave-absorbing performance, be good in bonding strength with a matrix and excellent in corrosion resistance, and the composite wave-absorbing material is suitable for severe marine environments.

The invention discloses a high-thermal-stability iron-based amorphous coating and a manufacturing method thereof, and belongs to the technical field of material surface engineering. Firstly, raw material powder is obtained for manufacturing a powder core wire, wherein the raw material powder comprises, by mass, 19.3% to 22.5% of Cr, 17.2% to 20.3% of Mo, 3.1% to 5.3% of B, 3.0% to 5.2% of C and the balance Fe; secondly, a bottom coating is manufactured on a pretreated substrate material in a nickel broom-finish or Ni / Al electric arc spraying manner, and the high combination strength of the amorphous coating and the substrate material is guaranteed; and finally, the iron-based amorphous coating is deposited on the bottom coating in an electric arc spraying manner. The manufactured amorphous coating has the beneficial effects of being high in amorphous content, rigidity and thermal stability and wide in application prospect under the corrosion, abrasion and scouring resistant working conditions in the fields of chemical engineering, mining, thermal power and the like. Particularly due to the feature of the high thermal stability, the coating has the larger advantage compared with a conventional iron-based amorphous coating in the environments, like four pipes of a boiler, at certain temperatures under the corrosion, scouring and abrasion working conditions.