252 results about "Fernico" patented technology

The invention discloses a preparation method of low-loss high-saturation iron-nickel soft magnetic powder. Comprising the following steps of S1, alloy smelting and S2, atomization. S3, carrying out ball milling treatment; s4, annealing treatment; s5, carrying out surface coating; the low-loss high-saturation iron-nickel soft magnetic powder is prepared from the following raw materials in percentage by weight: 77.6%-78.2% of electrolytic nickel, 21.4%-22.3% of electrolytic iron and 0.1%-1% of an additive, the performance of the iron-nickel soft magnetic powder and a magnetic powder core prepared by the process is improved in multiple aspects, and the iron-nickel soft magnetic powder has great application advantages.

The invention relates to a high-frequency and high-performance iron-nickel alloy magnetic powder core and a preparation method and application thereof, belongs to the field of metal magnetic powder cores, and solves the problems that in the prior art, when a metal magnetic powder core is applied at high frequency, high magnetic conductivity, high magnetic conductivity stability and high quality factor are difficult to consider, and the saturation flux density is low. And the preparation process is tedious. The invention discloses a preparation method of a high-frequency high-performance iron-nickel alloy magnetic powder core. The preparation method comprises the following steps: S1, preparing raw materials; s2, performing pretreatment; s3, the pretreated iron-nickel alloy powder and nano SiO2 powder are blended, and inorganic insulation coating powder is obtained; s4, adding the inorganic insulating coating powder into a first coating agent to obtain inorganic and first organic insulating coating powder; s5, adding the inorganic and first organic insulation coating powder into a second coating agent to obtain inorganic and double-layer organic insulation coating powder; and S6, compression molding. The comprehensive magnetic performance of the iron-nickel magnetic powder core is improved, and the preparation process is simplified.

The invention discloses a heat treatment method of an iron-nickel-based high-temperature alloy, which solves the contradiction between stress relief annealing and performance maintenance through four-step temperature coordinated regulation and control: in the first step, MC type carbide is dissolved through solid solution, segregation is eliminated, and excessive growth of crystal grains is avoided; in the second step, roughening of M23C6 type carbides is inhibited through solid solution, and formation of fine and uniform carbides on grain boundaries is promoted so as to strengthen the grain boundaries; in the third step, the residual stress is reduced through stress relief annealing, and meanwhile grain boundary carbide growth and abnormal grain growth are avoided; and in the fourth step, uniform and stable precipitation of a gamma'phase is promoted through aging, the nanometer size and the high volume fraction are maintained, and coarsening is avoided. Through precise temperature connection, the residual stress is effectively reduced, grain growth, structure nonuniformity or performance degradation caused by traditional annealing are avoided, and finally the application requirement of the superhigh-temperature steam environment at the temperature of 650 DEG C or above is met on the premise that the mechanical property and the corrosion resistance are guaranteed.

The invention relates to a powder metallurgy high-performance copper-based alloy friction plate for a torque limiter of a wind power coupler and a preparation method of the friction plate. The friction plate is composed of, by mass, 9%-14% of carbon, 1%-3% of tin, 2%-8% of friction components, 12%-18% of iron, 0%-3% of nickel and the balance copper. The preparation method comprises the steps of burdening, mixing, forming, sintering and machining. The prepared high-performance copper-based alloy friction plate is particularly suitable for a torque limiter of a wind power generation coupler. The alloy disclosed by the invention is reasonable in component design, simple and controllable in preparation process, easy to realize batch, large-scale and automatic production, high in production efficiency, energy-saving and moderate in cost; the obtained product is excellent in performance, and can greatly improve the torque control precision, save the maintenance cost and improve the operation safety and reliability of wind power equipment when being applied to a wind power coupling torque limiter.

The present application provides a susceptor for inductively heating an aerosol generating substrate, a preparation method of the susceptor, and an aerosol generating article comprising the susceptor; the susceptor comprises a single alloy prepared by smelting iron, nickel and zircon as main element raw materials, has a Curie temperature of 300-600 DEG C, and the initial magnetic permeability of the alloy presents a peak characteristic with the increase of temperature. The single layer structure susceptor of the single alloy material of the present application realizes the functions of heating and temperature control at the same time, and overcomes the defects of the prior art, such as complex process, high preparation cost, and limited compatibility of electromagnetic induction heating appliances. Meanwhile, the susceptor has a relatively wide magnetic performance variation window and an aerosol generating system performance variation window, and can be flexibly adapted to more aerosol generating substrates.

The invention discloses an iron-nickel metal magnetic powder core with high stable magnetic conductivity and low loss and a preparation method of the iron-nickel metal magnetic powder core. The iron-nickel metal magnetic powder core is prepared through the steps of preparing iron-nickel alloy powder through gas atomization, screening the particle size, carrying out insulation coating, carrying out compression molding, carrying out heat treatment and carrying out impregnation and spraying. Wherein in the insulating coating process, a passivation solution is adopted to form an insulating layer on the surface of the iron-nickel alloy powder, and the passivation solution comprises 0.1 wt%-0.3 wt% of phosphoric acid, 0.1 wt%-0.6 wt% of sol and the balance deionized water according to the weight part of the iron-nickel alloy powder; and the pH value of the passivation solution is 4-7. According to the technical scheme, the iron-nickel alloy powder is subjected to insulation coating through cooperation of the phosphoric acid, the sol and the coating agent, the magnetic hysteresis loss is effectively reduced, the magnetic conductivity of the iron-nickel magnetic powder core is improved, the quality factor of the iron-nickel magnetic powder core is remarkably improved to 95 or above, and after the obtained high-magnetic-conductivity low-loss iron-nickel magnetic powder core is subjected to long-term high-temperature aging, the magnetic conductivity change rate does not exceed 2%; and the safety and the performance stability are greatly improved in the application of power electronic devices.

The invention belongs to the technical field of stainless steel composite plates, and particularly relates to an iron-nickel stainless steel composite plate production process which comprises the following steps: performing plasma sputtering cleaning on a carbon steel base layer; the iron-nickel-stainless steel composite layer is subjected to laser micro-cladding treatment to form a micro-groove array, and a nano nickel-titanium alloy transition layer is preset in the micro-groove array; explosive cladding is carried out in a helium and argon mixed gas environment with the oxygen content smaller than or equal to 10 ppm, so that the carbon steel base layer and the iron-nickel-stainless steel cladding layer are subjected to interface metallurgical bonding to form a composite plate blank; the composite plate blank is hot-rolled and water-cooled to 500 DEG C or below after being heated and subjected to heat preservation; and the rolled composite plate blank is placed in mixed gas of nitrogen and hydrogen for isolation annealing, the bonding strength and the shearing strength are improved through an interface gradient diffusion layer composite structure constructed through the nanoscale, and interface oxidation and stress concentration in the rolling process are inhibited through asymmetrical rolling and a nanometer heat insulation coating; and multi-stage controlled cooling and diffusion barrier annealing are cooperatively regulated and controlled, so that the pitting corrosion resistance potential of the iron-nickel stainless steel clad layer is improved.

The invention discloses a soft magnetic composite material and a preparation method thereof, and belongs to the technical field of soft magnetic materials. The preparation method of the soft magnetic composite material comprises the steps that iron, nickel, manganese, aluminum, silicon and chromium are prepared into superfine alloy powder with the D50 particle size ranging from 100 nm to 3000 nm, then the superfine alloy powder reacts with 3-aminopropyltriethoxysilane and tetraethoxysilane firstly and then reacts with cyclobutane tetracarboxylic dianhydride and 3-aminobenzophenone, and the soft magnetic composite material is prepared. The invention discloses a soft magnetic composite material with excellent direct current bias performance and excellent quality factor and a preparation method thereof.

The invention provides a novel method for smelting metal or alloy by reducing metal oxide through hydrogen. The method comprises the steps of material mixing, pelletizing, sintering, melting, reducing, deslagging, metal tapping, basalt preparation, gas recovery and the like. And the smelting efficiency is improved through the slagging agent in a specific ratio and optimization of the alkalinity of the slag. Hydrogen is used as a reducing agent, greenhouse gas emission is remarkably reduced, meanwhile, industrial by-products such as red mud and fly ash are used as slag formers, and waste resource utilization is achieved. And the slag can be prepared into basalt after component adjustment, so that the economic value of the process is enhanced. And a recycling link of mixed gas of hydrogen and water vapor is also designed, so that the energy utilization efficiency is improved. The technology is suitable for reduction of various metal oxides such as iron, nickel, cobalt, copper, lead or silicon, the technological process is clear, operation is easy and convenient, good raw material adaptability and technical flexibility are shown, and the technology is a novel efficient, environment-friendly and economical metal smelting technology.

The present invention provides an iron-based nanocrystalline soft magnetic alloy powder, a soft magnetic composite material and a preparation method thereof, belonging to the technical field of soft magnetic materials. The iron-based nanocrystalline soft magnetic alloy powder has a heterogeneous nanocrystalline structure comprising a three-dimensional island-shaped amorphous region and a nanocrystalline region. The diameter of the three-dimensional island-shaped amorphous region is 50-100 nm, and the number density of the three-dimensional island-shaped amorphous region is 10 19 ‑10 20 m ‑3 The iron-based nanocrystalline soft magnetic alloy powder has the advantages of high sphericity, high saturation magnetization and low coercive force; the soft magnetic composite material comprises soft magnetic powder and a coating layer coated on the surface of the soft magnetic powder, and the coating layer comprises a binder, wherein the soft magnetic powder is the iron-based nanocrystalline soft magnetic alloy powder provided by the present invention, or is composited with at least one of iron-nickel, iron-nickel-molybdenum, iron-silicon, iron-silicon-aluminum, iron-silicon-chromium, carbonyl iron and pure iron powder, and has the advantages of low high-frequency loss, high magnetic permeability and high DC bias.

The invention discloses low-loss superfine soft magnetic alloy powder and a manufacturing method and application thereof, belongs to the technical field of soft magnetic materials, and particularly relates to a method for preparing superfine alloy powder by smelting iron, nickel, manganese, aluminum, silicon and chromium into alloy and adopting an evaporation condensation method. Then coating the surface of the superfine alloy powder with a phosphating film by using a medium-temperature zinc-manganese phosphating solution and a phosphating auxiliary agent, and then coating with a silicon dioxide layer to obtain coated low-loss superfine soft magnetic alloy powder; wherein the phosphating auxiliary agent at least comprises a sodium sulfonate derivative, and in the preparation of the sodium sulfonate derivative, azelaic acid dichloride and 1-octylene-3-alcohol are subjected to a reaction, and then sodium hydrogen sulfite is added for a reaction to obtain the sodium sulfonate derivative. The D50 particle size of the prepared low-loss superfine magnetically soft alloy powder ranges from 100 nm to 3000 nm; the resistivity is high, and the resistivity reaches 9.0 omega.cm or above; and the power loss is low and is lower than 320.3 mW / cm < 3 >, and the method can be used for preparing a high-performance inductor.

The invention belongs to the technical field of catalytic materials, and particularly relates to a preparation method and application of an iridium-based nano high-entropy alloy for an OER electrocatalyst. Five metal elements of iridium (Ir), ruthenium (Ru), iron (Fe), nickel (Ni) and tin (Sn) are mixed to serve as a parent material, and the parent material is mixed with an organic solvent aqueous solution which is specifically prepared to form powder turbid liquid or the parent material and the organic solvent aqueous solution are evenly mixed and pressed into a metal target material. And then the micro-nano powder or the metal target material in the turbid liquid is subjected to laser ablation treatment through a temperature field modulated laser liquid phase corrosion method, nano-particles are formed under the action of high-energy laser, and finally the iridium-based nano high-entropy alloy is prepared. The prepared iridium-based nano high-entropy alloy has excellent catalytic performance in the field of OER.

The invention relates to an iron-nickel magnetically soft alloy, in particular to an iron-nickel magnetically soft alloy with high magnetic conductivity and high magnetic induction and a preparation method of the iron-nickel magnetically soft alloy. The iron-nickel magnetically soft alloy comprises the following chemical components in percentage by mass: 48.00 to 51.00 percent of N , 0.10 to 0.30 percent of Mn, 2.50 to 5.00 percent of Cr, 1.00 to 1.50 percent of T , 0 to 0.30 percent of A < l >, less than 0.10 percent of S , less than 0.02 percent of C and the balance of Fe and inevitable impurities. The preparation method is realized based on the chemical components. On the basis of an existing 1J50 alloy, 2.50-5.00% of Cr, 1.00-1.50% of Ti and 0-0.30% of A are added, and the mechanical property, corrosion resistance and conductivity of the iron-nickel magnetically soft alloy can be improved on the premise that the magnetic property of the iron-nickel magnetically soft alloy is not affected.

The invention relates to the technical field of motors, in particular to a magnetic conductance motor adopting a magnetic conductance reinforcing material, which comprises a stator assembly and a rotor assembly which are concentrically arranged, and the rotor assembly is arranged in the stator assembly. The stator assembly is formed by radially positioning and splicing 12-24 silicon steel sheet inserts through a dovetail joint structure, traditional lamination gap loss is eliminated, T-shaped teeth (iron-nickel-based magnetically soft alloy 1J34 / 1J36) which are deeply embedded (1 / 3-1 / 2 of the tooth height) are combined, the magnetic circuit conduction efficiency is remarkably optimized through the high magnetic conductivity (larger than or equal to 60,000 H / m) and the saturation flux density (larger than or equal to 1.5 T), and the magnetic saturation risk is avoided; a non-magnetic stainless steel base body (304 / 316) is adopted on the rotor side to block a stray magnetic circuit, and a low-loss magnetic field closed loop is formed by matching the magnetism gathering design of a V-shaped neodymium iron boron insert (Br is larger than or equal to 1.2 T, Hc is larger than or equal to 900 kA / m, and the included angle is 60-90 degrees) and directional magnetism conduction of a 20-30-degree fan-shaped angle magnetic barrier insert, so that the purposes of high efficiency, low consumption, high reliability and low cost are achieved.

The invention belongs to the technical field of soft magnetic materials, and particularly relates to a preparation method of a low-loss high-direct-current superposition iron-silicon / iron-nickel composite magnetic powder core. The large-particle iron-silicon alloy powder and the small-particle iron-nickel alloy powder are mixed, the large deformation degree of the iron-nickel particles can be prevented, meanwhile, the direct-current superposition characteristic of the magnetic powder core is improved, and power loss is reduced. And the magnetic powder is preheated in N2 or H2 atmosphere, so that the grains grow up, the grain boundary is reduced, and the hysteresis loss of the magnetic powder core is effectively reduced. The magnetic powder is coated with the aluminum-magnesium silicate, the coating effect can be improved, the dispersion effect of the coated magnetic powder is good, the redundant coating agent serves as filler, and the completeness of a coating layer during forming is guaranteed. And the magnetic powder core blank is annealed in the H2 atmosphere, so that the blank is prevented from being oxidized, and the power loss of the magnetic powder core is reduced. The prepared low-loss iron-silicon magnetic powder core has excellent soft magnetic performance and low power loss, and meets the requirements of electronic components for soft magnetic material performance.

The invention relates to preparation of an intelligent self-repairing iron-nickel-based corrosion-resistant alloy material, which comprises the following steps: synthesis of acrylic resin, preparation process of microcapsules, pretreatment of a magnesium alloy substrate, preparation of an acrylic resin coating, preparation of an electro-deposition iron-nickel alloy, preparation of a precursor ceramic repairing agent, and preparation of the intelligent self-repairing iron-nickel-based corrosion-resistant alloy material. An electrodeposition method, a solution polymerization method and a coating preparation method are creatively combined, the prepared intelligent self-repairing iron-nickel-based corrosion-resistant alloy material is a high-strength and high-hardness alloy material, and the intelligent self-repairing iron-nickel-based corrosion-resistant alloy material has the advantages of self-repairing function, corrosion resistance, wear resistance and high hardness.

The invention provides a diamond trephine which comprises a steel base body and a tool bit, the tool bit comprises the following raw materials in percentage by weight: 50%-60% of superfine iron-nickel pre-alloy powder, 15%-30% of superfine copper powder, 2%-5% of tin powder, 15%-30% of superfine tungsten carbide powder, 5%-10% of yttrium oxide powder and the balance of diamond raw materials, and the diamond raw materials comprise the superfine iron-nickel pre-alloy powder, the superfine copper powder, the tin powder, the superfine tungsten carbide powder, the yttrium oxide powder and the diamond raw materials. The trephine is characterized in that the trephine comprises a steel base body, the steel base body is provided with a plurality of tool bits, the tool bits comprise 3%-6% by volume of yttrium oxide powder and 15%-50% by volume of diamond, the granularity of the tool bits is 400-700 microns, one faces of the tool bits are arranged on the steel base body at intervals through laser welding, the other faces of the tool bits are provided with U-shaped grooves, and the two side faces of the tool bits are further provided with V-shaped grooves. The method specifically comprises the steps of burdening, mixing, coating, cold press molding, hot press sintering, laser welding and the like. According to the trephine, the cutting speed of the trephine can be effectively increased, the service life of the trephine can be effectively prolonged, the U-shaped groove and the V-shaped groove are formed in the tool bit, the contact area between the tool bit and a cutting material is reduced, friction cutting resistance is reduced, and the chip removal capacity and sharpness of the trephine can be obviously improved.

The preparation method comprises the steps that 1, an anode plate and a cathode roller are separately arranged in an electrolytic bath, the anode plate is made of iridium oxide titanium, the cathode roller is made of titanium, electrolyte is added into the electrolytic bath, first current is applied to the electrolyte, iron-nickel alloy is deposited on the surface of the cathode roller, and the iron-nickel alloy foil is obtained; 2, the iron-nickel alloy foil is moved into a copper plating tank containing a copper plating solution through a roll-to-roll process, second current is applied to the copper plating solution, surface copper plating is conducted, and the iron-nickel alloy foil subjected to copper plating is obtained; and 3, the copper-plated iron-nickel alloy foil is moved into a chromium anti-oxidation tank containing a Cr anti-rust solution through a roll-to-roll process to be subjected to Cr anti-rust treatment, and the iron-nickel alloy foil with the copper-plated surface is obtained through rolling. The surface copper-plated iron-nickel alloy foil provided by the invention solves the problem that the copper foil layer is easy to peel off due to insufficient binding force between the existing copper foil layer and the iron-nickel alloy foil layer.

The invention relates to the technical field of high-specific-gravity tungsten alloy materials, in particular to a high-specific-gravity tungsten-refractory high-entropy alloy composite material and a preparation method thereof. The specific preparation method comprises the following steps that an iron-nickel phase serves as a binding phase, tungsten powder and refractory high-entropy alloy powder serve as a reinforcing phase, after the tungsten powder, the refractory high-entropy alloy powder, iron powder and nickel powder are subjected to ball milling and mixing, spark plasma sintering is conducted at the temperature of 1100-1300 DEG C, and the iron-nickel phase and the reinforcing phase are formed in the sintering process; and the high-specific-gravity tungsten-refractory high-entropy alloy composite material is prepared. According to the preparation method, a spark plasma sintering process is used, and multiple high-specific-gravity tungsten-refractory high-entropy alloy composite materials with different components, different structures and mechanical properties are prepared by changing the components and sintering process parameters of the multi-principal-element tungsten alloy; the problem that the head of an armor-piercing shell core material prepared from an existing high-specific-gravity tungsten alloy material is prone to passivation in the penetration process is solved.

The invention discloses a printing tungsten paste for an HTCC ceramic matrix. The printing tungsten paste comprises the following basic materials in percentage by mass: 78-82% of tungsten powder, 4-8% of aluminum oxide ceramic powder and 14-18% of an organic carrier; the mass of the iron-nickel powder accounts for 0.5-5% of the mass of the base material, and the mass of the hydrogenated castor oil accounts for 0.3-0.6% of the mass of the base material. The invention also discloses a preparation method of the printing tungsten paste for the HTCC ceramic matrix. The method is characterized in that the iron-nickel powder is introduced into the tungsten slurry, iron and nickel belong to transition metal and construct a d10 configuration with tungsten metal, sintering activation energy among tungsten particles can be reduced, activated sintering occurs, iron and nickel serve as a'bridge 'for tungsten atom transmission, and therefore the sintering temperature and sheet resistance of a film layer can be reduced at the same time; and meanwhile, energy loss and conductor loss are reduced.

The invention relates to a preparation method of a nickel-chromium-iron alloy consumable electrode, the consumable electrode and an alloy ingot. The method comprises the steps that an electrolytic nickel plate is subjected to vacuum melting under the condition that the vacuum degree is smaller than or equal to 0.67 Pa, after the electrolytic nickel plate is melted down, the vacuum degree is kept to be smaller than 2 Pa and lasts for 5 min to 10 min, and a nickel melt with the lead removal rate larger than or equal to 60% is obtained; pouring the nickel melt into a pure nickel electrode under a vacuum condition; combining the pure nickel electrode with industrial pure iron to form an iron-nickel composite electrode; with the iron-nickel composite electrode as a consumable electrode, ferrochrome is added into a lined electroslag furnace for smelting, and a high-temperature metal melt is obtained; the high-temperature metal melt is tapped to a steel ladle, and argon is blown to the bottom of the high-temperature metal melt in the steel ladle for 3-5 min; and the high-temperature metal melt obtained after bottom argon blowing is poured into the consumable electrode. According to the method, five types of fusible elements including Pb, Bi, Sn, As and Sb are systematically and gradually reduced to be extremely trace by coupling three steps of vacuum volatilization, deep electroslag separation and secondary ladle refining.

The invention discloses a magnetic powder core and a preparation method thereof, belongs to the technical field of magnetic powder cores, and overcomes the defect that loss of the magnetic powder core is remarkably increased under the high-temperature working condition in the prior art. The preparation method of the magnetic powder core comprises the following steps: S1, preparing magnetic powder; the magnetic powder is iron-nickel-aluminum alloy soft magnetic powder and comprises, by mass, 37%-42% of iron, 60%-64% of nickel and 2.5%-3% of aluminum. S2, performing heat treatment on the magnetic powder under the action of pressure; s3, carrying out coating treatment on a product obtained in S2; s4, performing compression molding on a product obtained in S3 to obtain a blank; and S5, the blank is subjected to heat treatment, and the magnetic powder core is obtained. The magnetic powder core has the negative loss temperature coefficient within a certain range, and the problem that the loss performance of a conventional iron-nickel magnetic powder core is deteriorated at the high temperature is solved.

The invention discloses iron-nickel-based low-expansion alloy powder and a preparation method thereof.The alloy powder comprises, by mass, less than or equal to 0.05% of C, less than or equal to 0.5% of Co, 35%-37% of Ni, 0.2%-0.6% of Mn, less than or equal to 0.3% of Si, less than or equal to 0.01% of S, less than or equal to 0.01% of P, less than or equal to 0.02% of O, 0.025% of Ce, 0.025% of Le and 62% of Fe, and the defects of traditional invar steel powder in component control, density and thermal expansion performance are overcome. Through combination of component design, precise smelting and an advanced atomization process, the comprehensive performance of the material is remarkably improved, the application requirement of modern high-end manufacturing on the material in an extreme environment is met, and the material has wide market prospects and popularization value.

The invention provides an iron-nickel-cobalt alloy without martensite phase transformation and a preparation method, and belongs to the field of alloy preparation. Comprising the following chemical components: 27%-28% of Ni, 17.5%-18% of Co, 0.01%-0.1% of Mo, 0.5%-0.8% of Mn, 0.015%-0.025% of C, 0.01%-0.02% of N, 0.1%-0.15% of Cu, 0.1%-0.3% of Cr, Fe and inevitable impurities. The chemical components of the iron-nickel-cobalt alloy are reasonably designed, the stability of austenite can be improved on the premise that the content of trace alloy elements is strictly controlled, and the expansion alloy without martensite phase transformation at the low temperature can be obtained through follow-up treatment on the premise that the expansion coefficient is not obviously sacrificed. Therefore, the expansion coefficient is not sacrificed while martensite phase transformation of the iron-nickel-cobalt alloy is completely inhibited.

The present invention addresses the problem of suppressing deformation such as edge waves, center waves, and warping from occurring in an ultra-thin (50 μm or less in thickness) iron–nickel alloy foil, and the purpose of the present invention is to obtain an iron–nickel alloy foil in which such deformation is suppressed. This iron–nickel alloy foil has a positron annihilation lifetime (PAL) of at least 0.150 ns and can reduce the amount of deformation (the total evaluated amount of deformation such as edge waves, center waves, and warping) relative to conventional products. In order to form a primarily vacant microstructure to achieve a PAL of at least 0.150 ns, an iron–nickel alloy foil can be obtained by manufacturing an alloy block (slab) by HIP treatment and rolling and heat treating the alloy block in accordance with conventional methods.

The invention relates to an iron-nickel-based medium-temperature electrothermal alloy and a preparation method thereof, and belongs to the technical field of alloy preparation. The electrothermal alloy comprises the following chemical components in percentage by mass: 0.01%-0.03% of C, 0.70%-1.50% of Al, less than or equal to 0.80% of Cr, less than or equal to 0.003% of S, less than or equal to 0.020% of P, 51%-53% of Ni, 0.04%-0.20% of rare earth, 0.80%-1.50% of Ti and a matrix element Fe, wherein the rare earth comprises at least one of Y, La and Ce. Alloy elements such as Al, rare earth and Ti are introduced, so that the oxidation resistance of the alloy is improved, and the service life of the alloy in a medium-temperature environment is greatly prolonged. And meanwhile, on the basis of ensuring excellent mechanical properties, the resistivity of the alloy material is effectively improved, and the resistance temperature coefficient of the alloy material is optimized, so that the alloy material can better meet the performance requirement of the positive temperature coefficient effect, and finally, the applicability, design flexibility and integration degree of the electrothermal alloy in a limited design space are enhanced.

The invention belongs to the technical field of oxygen reduction catalysts, and discloses a hollow nanocage loaded high-entropy alloy electrocatalyst and a preparation method and application thereof. The preparation method comprises the following steps: synthesizing PS balls through an emulsion polymerization method, mixing, stirring and aging a solution prepared from 2-methylimidazole, cobalt nitrate and zinc nitrate in methanol and the PS balls, then adding metal precursors of iron, nickel and copper, and carrying out washing, drying, heat treatment and concentrated nitric acid etching to prepare NC-CoZnFeNiCu. The high-entropy alloy is located on the carbon nanocage, multiple active sites are formed due to the compression strain caused by the ultra-small bending carbon layer and the good synergistic coordination effect of the high-entropy alloy, and the reaction potential barrier of oxygen reduction is effectively reduced. The oxygen reduction performance of the material is superior to that of commercial Pt / C, the half-wave potential is 0.896 V, and the dynamic current density is 31.88 mA / cm < 2 >. By combining the structures of the high-entropy alloy and the hollow nanocage, the electron conduction capability of the catalyst is enhanced, and the performance of the oxygen reduction reaction is remarkably improved.

The invention discloses a nickel-based alloy material for laser cladding and GTAW connection. The nickel-based alloy material comprises a laser cladding material and a GTAW welding material, wherein the laser cladding material comprises the following components in percentage by mass: 20.0-30.0% of Ni powder, 20.0-30.0% of Co powder, 10.0-20.0% of Cr powder and the balance of Fe powder, and the sum of the mass percentages of the components is 100%; the GTAW welding material comprises a flux core and a welding skin, the flux core comprises, by mass, 30.0%-40.0% of Fe powder, 10.0%-20.0% of Co powder, 10.0%-20.0% of Ta powder, 3%-6% of Al powder, 3%-6% of Ti powder and the balance Ni powder, and the sum of the mass percentages of the components is 100%. The invention further discloses a nickel-based alloy welding connection method, and the softening problem of the aging-state iron-nickel-based high-temperature alloy joint under the GTAW technology is solved.

The utility model relates to the field of power electronic devices, in particular to a damping ring for an electric reactor. Comprising an upper shell, a lower shell which is detachably connected with the upper shell, a ring shaft which is detachably arranged between the upper shell and the lower shell, and a winding type annular iron core which is sleeved on the ring shaft and is formed by winding an iron-nickel base alloy belt. According to the utility model, the structural design is further optimized while the good electromagnetic performance of the damping ring is maintained, and the installation convenience, the heat dissipation performance and the universality are improved.

Nickel-based alloy welding wire for welding dissimilar iron / nickel rotors, its preparation method, and its application. This invention belongs to the technical field of nickel-based alloy materials. The purpose of this invention is to solve the technical problem that existing weldable nickel-based alloy welding materials cannot meet the practical engineering needs of welding rotors made of dissimilar nickel-based and iron-based materials. This invention achieves this by comprehensively controlling the composition of the welding wire, especially by precisely controlling the content of Al, Ti, Nb, and Ta, to ensure that the deposited metal maintains high comprehensive mechanical properties at room temperature and high temperature under conditions of no solution aging, and also ensures good welding performance. It is applied to the welding of dissimilar nickel-based and iron-based alloy rotors at 700℃.