70 results about "Cobalt based alloy" patented technology

The invention relates to the technical field of material science, and discloses a slurry valve erosion-resistant multi-layer coating with gradient function design and a preparation method thereof.The coating comprises a bonding layer, a gradient function layer and an erosion-resistant surface layer which are sequentially arranged from inside to outside, the bonding layer is composed of nickel-based alloy or cobalt-based alloy, the thickness of the bonding layer is 50-100 micrometers, and the thickness of the gradient function layer is 50-100 micrometers. The gradient functional layer is made of composite powder of metal and ceramic, the metal is nickel or cobalt, the ceramic is tungsten carbide or chromium carbide, and the components of the gradient functional layer are from the bonding layer side to the erosion-resistant surface layer side; the bonding layer is arranged and forms firm metallurgical bonding with the matrix, the interface stress is reduced, the basic reliability of bonding of the coating and the matrix is guaranteed, meanwhile, the gradient functional layer with the metal and ceramic volume fraction gradually changing continuously is adopted, the problem that the thermal expansion coefficients of the coating and the matrix are not matched is solved, and the service life of the coating is prolonged. And the crack initiation and expansion risk caused by internal stress concentration is reduced, so that the long-term stability of the coating structure is ensured.

An Fe—Co-based alloy bar and a method for manufacturing same, whereby excellent magnetic properties can be reliably obtained. The Fe—Co-based alloy bar has 20% or more by area ratio of crystal grains having a grain orientation spread (GOS) value of at least 0.5°. The Fe—Co-based alloy bar contains 95% or more of Fe+Co in mass %.

The invention relates to a low-fault-energy micro-twin synergistic deformation cobalt-based alloy and a preparation method thereof, and belongs to the field of cobalt-based high-temperature alloys. According to the alloy, on the basis of Co-Al-W, Ti and Ta which are smaller than or equal to 4 wt% are added according to calculation of a first principle, and the stacking fault energy is controlled to be-95 mJ / m < 2 > to-89 mJ / m < 2 > (0K). Aiming at the defect of insufficient high-temperature plasticity of the gamma '-phase strengthened cobalt-based alloy, an electronic structure is accurately regulated and controlled through a first principle, intrinsic stacking fault energy is designed to reach an optimal negative value interval, a micro-twin mechanism is activated, dislocation slippage and micro-twin coordination is realized, and the problem of sudden plasticity drop caused by single deformation mechanism (dislocation slippage leading) and grain boundary weakening of a traditional alloy is solved; the high-temperature strength and the plasticity are synchronously improved.

The invention relates to the technical field of alloys, in particular to a preparation method of a high-wear-resistance hard alloy for geomines. The method comprises the following steps: taking nickel-based corrosion-resistant alloy powder with specific components as a binding phase instead of cobalt, carrying out wet ball-milling mixing, forming, dewaxing and pre-sintering on the binding phase and hard phase powder such as tungsten carbide, and then carrying out vacuum-back pressure pulse treatment on a pre-sintered body by adopting an infiltration solution containing polyacrylic acid, branched polyethyleneimine and dopamine hydrochloride; and carrying out vacuum final sintering and hot isostatic pressing densification treatment to obtain a final product. Through material system innovation and process optimization, the wear resistance, corrosion resistance and toughness of the hard alloy under the underground severe working condition are remarkably improved, and the problems that a traditional cobalt-based alloy binding phase is prone to corrosion, and the service life of a tool is short are effectively solved.

This invention discloses a cobalt-based alloy sand, a method for preparing and optimizing the surface of the damaged area, relating to the field of alloy repair. The cobalt-based alloy sand includes Cr, Ni, Mo, Ti, Ta, B, and Y, with the remainder being Co and / or unavoidable impurity elements. The method for optimizing the surface of the damaged area mainly involves sandblasting the surface of the damaged area twice. This invention can sandblast the damaged area surface to achieve the purpose of surface modification, thereby inhibiting the aggregation of Si-rich and B-rich brittle eutectic phases at the interface during powder metallurgy and improving the interfacial bonding strength of the repair joint.

The invention discloses a metallurgical-defect-free high-temperature wear-resistant cobalt-based alloy coating and a preparation method and application thereof.The preparation method comprises the following steps that (1) Fe powder, Co powder, Cr powder, Ti powder, Mo powder and Ni powder are accurately weighed according to the stoichiometric equation Co57Fe5Ni5Cr25Ti5Mo3, and (2) the weighed powder is put into a ball milling tank to be subjected to ball milling, so that the powder is evenly mixed, and then drying, sieving and drying storage are conducted; (3) 5NiCrMo hot work die steel is selected as a base material, a sand mill is used for polishing the surface of the base material so as to remove surface oxide skin until a bright surface is exposed, and oil stains on the surface are removed; and (4) a laser directional energy deposition method in laser additive manufacturing is used for continuously depositing the crack-free cobalt-based alloy coating with high temperature resistance, wear resistance and no cracks one by one. The high-temperature wear-resistant alloy shows excellent wear resistance at a high temperature, the alloy has a shallower wear depth and a narrower grinding crack width at the high temperature, and the wear rate at the high temperature of 800 DEG C is reduced from 2.171 * 10 <-4 > mm < 3 > / N.m of a 5CrNiMo base material to 2.45 * 10 < 6 > mm < 3 > / N.m of a coating.

This invention relates to the field of circuit material processing technology, and in particular to a high-performance buried resistive copper foil and its preparation method. The buried resistive copper foil is composed of an electrolytic copper foil layer, a barrier layer, a resistance alloy layer, and a cobalt-based alloy seed layer. The cobalt-based alloy seed layer is a cobalt-tantalum-iridium-molybdenum alloy. The resistance alloy layer is an alloy composed of two or more elements selected from nickel, chromium, aluminum, silicon, phosphorus, cobalt, tin, tantalum, iridium, and molybdenum. The barrier layer is an alloy composed of one or two elements selected from nickel, chromium, aluminum, silicon, phosphorus, cobalt, tin, tantalum, iridium, and molybdenum. The preparation method includes the following steps: carrier cleaning, double-sided seed layer preparation, double-sided resistance alloy layer preparation, double-sided barrier layer preparation, hot pressing treatment, and carrier peeling. This invention improves the overall performance of the product through a multi-layer alloy plating structure design; at the same time, it provides an efficient preparation method to achieve simultaneous double-sided preparation and one-time production of two sheets of buried resistive copper foil, significantly improving production efficiency and reducing production costs.

The invention discloses a vacuum melting method of a high-nitrogen high-chromium wear-resistant cobalt-based alloy. The vacuum melting method comprises the following steps: (1) burdening according to target components; (2) carbon powder is placed at the bottom of a crucible, and then cobalt, chromium, molybdenum, nickel and iron are sequentially put into the furnace; (3) heating and raising the temperature until melting down, and carrying out vacuum refining; (4) filling high-purity nitrogen, and carrying out gas-phase nitriding; and (5) after nitriding is completed, hot-line pouring tapping is carried out. The high-nitrogen high-chromium wear-resistant cobalt-based alloy prepared by the method has the advantages of low production cost, simple process, stable nitrogen content and the like, and is suitable for large-scale popularization.

This invention relates to the field of electrochemical polishing of cobalt-based alloys, specifically to an environmentally friendly electrochemical polishing solution and polishing method for a cobalt-chromium-tungsten-nickel alloy. The cobalt-based alloy has the following chemical element mass percentages: Cr: 15.0%–25.0%; W: 10.0%–20.0%; Ni: 0.0%–15.0%; the balance being Co and unavoidable impurities such as O, N, and H. The environmentally friendly polishing solution has the following chemical composition and molar percentages: ChCl: 0.5–2 mol / L; ethylene glycol: 0.7–1.0 L; ethanol: 0–0.3 L; glacial acetic acid: 0.1–0.3 L; and a small amount of citric acid as an additive. The electrochemical polishing uses the alloy as the anode and a U-shaped titanium plate as the cathode, with a voltage of 40–60 V and a current density of 0.5–2 A / cm². 2 The polishing temperature is room temperature. The advantage of this invention is that it uses an environmentally friendly electrolyte, which can polish the surface of cobalt-chromium-tungsten-nickel alloy, avoiding the pollution of traditional chromium oxide system and acidic electrolyte system, reducing the need for repeated cleaning processes, and improving the precision control of materials.

The application discloses an anti-abrasion cobalt-based cladding powder, an ultrafine lamellar eutectic cobalt-based coating and a preparation method, and belongs to the technical field of anti-abrasion and anticorrosion alloy coating. The cladding powder comprises 15.0-20.0% of Ni, 14.0-15.0% of Cr, 22.0-25.0% of Mo, 2.7-2.9% of Si and 0.07% or less of C, and the rest is Co, in percentage by mass. The application utilizes the difference in mixing enthalpy of a specific content of Ni element and other elements in the cobalt-based alloy system, changes the non-equilibrium solidification path in laser cladding, suppresses the excessive precipitation and growth of Laves phase, and forms a Laves phase / (gamma-Co / Ni) lamellar ultrafine eutectic structure with excellent strength and toughness. Compared with the prior art, the application can significantly reduce the crack sensitivity of the coating without sacrificing the comprehensive performance of the coating in abrasion resistance and corrosion resistance.

The invention discloses a wear-resistant and corrosion-resistant metal mold and a preparation process thereof, and relates to the technical field of metal molds. The method specifically comprises the following steps that a die steel base body is taken and ground to be flat through a grinding machine, then cleaned and dried through acetone, nitrided and preheated, a transition layer and a functional surface layer are sequentially prepared on the surface of the die steel base body through laser cladding, and finally the abrasion-resistant and corrosion-resistant metal die is obtained through boriding. The transition layer comprises the following raw materials in parts by mass: 40-60 parts of nickel-based alloy, 20-30 parts of cobalt-based alloy, 10-12 parts of carbide and 5-8 parts of oxide; the functional surface layer comprises the following raw materials in parts by mass: 80-100 parts of cobalt-based alloy, 0.3-1 part of modified carbon nanotubes, 4-8 parts of carbides and 0.8-1 part of oxides.

The invention relates to a cobalt-based alloy, alloy powder and a manufacturing method thereof, and belongs to the field of cobalt-based alloys, and the cobalt-based alloy comprises the following components in percentage by weight (wt%): 1-40% of Cr, 1-40% of Mo, 1-5% of Si, 0-0.1% of C and the balance of Co. According to the cobalt-based alloy, by reducing the carbon content, a large number of brittle carbides are prevented from being formed, and the material is not prone to cracking when bearing impact loads; the cobalt-based alloy is low in carbon content and slight in decarburization, so that the mechanical property and the strength of a cobalt-based alloy powder product are not worsened; the matrix Co is subjected to solid solution strengthening through the molybdenum with the extremely high content, the intermetallic compounds Cr and Si are supplemented, solid solution strengthening and intermetallic compound strengthening are more stable than carbide strengthening of Co and Mo at the high temperature, overaging is not prone to occurring, and the cobalt-based alloy still has the excellent mechanical property, strength and abrasion resistance at the high temperature.

The application provides a steam turbine blade ultrahigh-temperature coating and a preparation method thereof, and relates to the technical field of material surface treatment, and comprises the following components in mass ratio: yttrium stabilized zirconium 20-30 parts, titanium aluminum nitride 15-20 parts, lanthanum magnesium aluminum spinel 10-15 parts, nano cerium oxide 5-10 parts, cobalt-based alloy 10-15 parts, rare earth element mixture 1-5 parts, hexagonal boron nitride 5-10 parts, SiC nano particles 5-10 parts, and chromium carbide 2-5 parts. The synergistic effect of the lanthanum magnesium aluminum spinel and the rare earth element mixture greatly reduces the grain growth rate of the coating at high temperature, thereby improving the stability at extreme temperature. The protective layer formed by the decomposition of the chromium carbide and the SiC nano particles jointly inhibit the sulfur corrosion, further improve the stability, and ensure the performance of the coating under high temperature conditions.

This invention belongs to the field of surface engineering of metallic materials and powder metallurgy technology, specifically relating to a surface composite layer for powder metallurgy components, its preparation method, and its application. The preparation method of the surface composite layer includes the following steps: uniformly mixing a base metal powder, pressing it into shape to obtain a powder metallurgy preform blank; mixing a reinforcing phase material, a binder, a dispersant, and an organic carrier to prepare a composite reinforcing slurry; coating the composite reinforcing slurry onto the surface area of ​​the preform blank requiring reinforcement; and heat-treating the coated preform blank to obtain the surface composite layer for the powder metallurgy component. The base metal powder includes iron-based, nickel-based, or cobalt-based alloy powders. The powder metallurgy component surface reinforcing layer prepared in this application combines the high hardness and high wear resistance of the reinforcing phase with the toughness and corrosion resistance of the metallic binder phase, making it suitable for surface reinforcement of large, heavy-duty, and complex-shaped powder metallurgy components with extremely high requirements for reliability and durability.

The application discloses a cobalt-based adhesive brazing filler metal, which is composed of cobalt-based alloy brazing filler metal powder 90-93% by mass fraction and an adhesive, and the adhesive is composed of the following components: polyacrylic acid ethyl ester 1-2%, ethyl cellulose 0.5-1%, tributyl phosphate 1.5-2%, diisobutyl phthalate 3-4%, fatty acid amide 0.5-1% and anti-aging agent 0.5-1%. In addition, the application further provides a preparation method of the cobalt-based adhesive brazing filler metal, which comprises the following steps: 1, cobalt-based alloy brazing filler metal powder preparation; 2, adhesive preparation; and 3, adhesive preparation. The cobalt-based alloy brazing filler metal powder is adhered and formed by the adhesive, and the cobalt-based adhesive brazing filler metal has adhesion, so that the cobalt-based adhesive brazing filler metal and a workpiece to be welded are adhered and not fallen off, uniformity can be ensured during brazing, the welds are consistent, and good brazing effect is achieved. In addition, by controlling the components of the adhesive, the cobalt-based adhesive brazing filler metal has the characteristics of low carbon residue, low oxidation, low delamination and long shelf life.

This application provides a cobalt-based composite bipolar plate for flow batteries, its preparation method, and the flow battery itself. The preparation method includes the following steps: pretreating cobalt-based alloy powder; mixing and stirring the pretreated cobalt-based alloy powder with an organic solvent dispersion of graphene nanosheets at a concentration of 3 mg / mL–10 mg / mL, followed by heat treatment under an inert atmosphere to obtain graphene nanosheet-coated cobalt-based alloy powder; mixing the graphene nanosheet-coated cobalt-based alloy powder with expanded graphite, carbon nanotubes, and carbon black to obtain a mixed filler; melt-blending the mixed filler at a mass ratio of 1:1–7:3 with a polymer matrix powder, extruding and granulating to obtain composite granules; and placing the composite granules into a preheated mold, hot-pressing, and cooling to demold, thereby obtaining the composite bipolar plate. The cobalt-based composite bipolar plate of this application exhibits excellent mechanical and electrical stability in vanadium redox flow battery stacks.

This invention belongs to the field of alloy heat treatment technology, specifically disclosing a heat treatment method for a stamped cobalt-based alloy film, the film itself, and its application. The method includes the following steps: The stamped cobalt-based alloy film is ultrasonically cleaned in ultrapure water for 15-30 minutes, then purged with gas and air-cooled for drying; the obtained cobalt-based alloy film is placed in a protective furnace and heated to 480-520°C, held for 30-60 minutes; after holding, the temperature is further increased to 620-680°C and held for 60-180 minutes; after holding, the protective furnace is cooled to 400-450°C and isothermal aging is performed at this temperature for 120-300 minutes; after holding, the protective furnace is cooled to room temperature, and the cobalt-based alloy film is removed; the obtained cobalt-based alloy film undergoes a second tempering: held at 520-560°C for 4-8 hours to obtain the film.

The application discloses a cobalt-based alloy powder production device for hard alloy and a preparation method thereof, relates to the technical field of alloy powder production, and comprises a smelting furnace, an air-atomization reaction furnace connected with the smelting furnace, and a grinding and screening device connected with the air-atomization reaction furnace. The grinding and screening device comprises a box body, a rotating groove is arranged on the side wall of the box body, a door plate is fixed to the outside of the rotating groove, a rotating frame is arranged in the rotating groove, a plurality of device grooves are arranged in the inner wall of the rotating frame in a penetrating mode, the device grooves are arranged at equal intervals along the circumference of the rotating frame, and a screening mechanism is arranged on the inner wall of each device groove. The cobalt-based alloy particles can be automatically recycled and ground, the closed-loop circulation design can realize sufficient grinding, the grinding efficiency is greatly improved, the screening efficiency of the cobalt-based alloy particles is effectively improved, and the problem that the screen plate is easily blocked is greatly reduced.

The invention relates to a modification method of a carbon electrode for a flow battery, the carbon electrode and the flow battery. The modification method comprises the following steps: pretreating a carbon electrode; cobalt-based alloy powder is sprayed to the pretreated carbon electrode in a sand blasting mode, and the carbon electrode loaded with the cobalt-based alloy powder is formed; heating the carbon-based electrode loaded with the powder of the cobalt-based alloy by an induction coil and cooling the carbon-based electrode to room temperature; and washing the obtained carbon electrode and drying the carbon electrode to obtain the modified carbon electrode. The electrode modification method provided by the invention is simple and feasible in process, and the electrical property of the carbon electrode is remarkably improved. The modified electrode provided by the invention not only can be suitable for an all-vanadium redox flow battery system, but also can be expanded to other types of redox flow battery systems.

The invention provides a method for improving the performance of a cobalt-based high-temperature alloy welding workpiece and a heat treatment workpiece. The method for improving the performance of the cobalt-based high-temperature alloy welding workpiece comprises the following steps that laser welding is conducted on a preheated cobalt-based alloy base material, and a welded workpiece is obtained; in a vacuum heat treatment furnace, the welded workpiece is subjected to solid solution heat treatment, and the workpiece is taken out for air cooling after solid solution heat treatment; and the air-cooled workpiece is placed in a vacuum heat treatment furnace, aging heat treatment is conducted on the workpiece subjected to solution treatment, and the workpiece subjected to aging heat treatment is cooled along with the furnace. According to the method, through combination of solid solution heat treatment and aging heat treatment, the toughness and hardness of the welded workpiece can be improved at the same time, meanwhile, alloy elements such as Cr and W in the cobalt-based high-temperature alloy subjected to vacuum heat treatment form a carbide precipitated phase, and the use performance is stable in the subsequent high-temperature environment; and the use performance of a welded workpiece in a high-temperature environment can be improved.

Along with higher performance of products, materials are also required to achieve both a high strength and favorable magnetic properties according to applications of products. Therefore, the present invention provides an Fe—Co-based alloy bar which enables both a high strength and favorable magnetic properties to be achieved.An Fe—Co-based alloy bar contains 30% to 80% of crystal grains having a grain orientation spread (GOS) value of 0.5° or more in terms of an area ratio, and having an average crystal grain size number of more than 8.5 and 12.0 or less. The Fe—Co-based alloy bar of the present invention has a high 0.2% yield strength after magnetic annealing so that it can support various high-strength applications.

The invention discloses an ultra-thick high-temperature-resistant and wear-resistant cladding layer on the surface of a hot mold and a preparation method and application thereof.The preparation method of the ultra-thick high-temperature-resistant and wear-resistant cladding layer on the surface of the hot mold comprises the following steps that S1, cladding layer mixed powder is prepared, and cobalt-based alloy powder comprises, by mass, 50%-60% of Co, 30%-35% of Cr, 1%-3% of Fe, 1%-2% of Si, 1%-3% of Ni, 0.2% of Mn, 0.2% of Mo and the balance Fe; and the cobalt-based alloy powder is mixed with tungsten carbide powder, and transition layer powder and wear layer powder are obtained. According to the prepared super-thick high-temperature-resistant and wear-resistant cladding layer on the surface of the hot mold, the cobalt-based alloy is creatively adopted as a high-temperature adhesive and matched with large-particle broken tungsten carbide to serve as a hard phase, and precise matching of the performance of the cladding layer is achieved by differentially regulating and controlling the content of tungsten carbide in the transition layer and the wear layer. The overall thickness of the coating is far larger than that of a traditional PVD titanium nitride coating, long-acting protection can be provided for the hot mold, and the service life of the hot mold under the high-temperature and high-abrasion working condition is greatly prolonged.

The application relates to the field of olefin catalysis, and discloses a supported cobalt-based alloy catalyst, a preparation method and application thereof, and a method for diisobutylene hydroformylation, the catalyst comprising a carrier, an active component and an additive, the carrier being SiO2, metal elements in the active component being Co, and metal elements in the additive being Ni; at least part of the metal elements in the active component form nano-alloy particles together with at least part of the metal elements in the additive, and the nano-alloy particles are loaded on the surface of the carrier. The supported cobalt-based alloy catalyst provided by the application has the advantages of simple preparation process, high catalytic activity, easy separation and recovery from a liquid phase, and potential application and industrial production.

The application discloses a preparation method of a high-manganese-steel surface laser cladding high-performance cobalt-based alloy coating and application of the high-manganese-steel surface laser cladding high-performance cobalt-based alloy coating in mine machinery wear-resistant parts, and belongs to the technical field of wear-resistant composite material surface strengthening. The preparation method comprises the following steps: substrate pretreatment, alloy powder preparation, three-dimensional modeling and cladding path planning, argon protection laser cladding, and post-processing. The raw material is strictly controlled to be in a high-purity form with P and S being less than 0.02%, the alloy powder is made into spherical powder through double-stage atomization and annular liquid nitrogen cooling, and the powder is modified by nano Al2O3 to refine grains and improve powder properties. The cladding adopts a spiral path, the post-processing is first air cooling / water mist cooling and then annealing at 380-420 DEG C, and finally polishing is performed, so that the coating has a three-section hardness gradient, the cladding positions of the layers are clear, and the microstructure is an austenite matrix dispersedly combined with carbide phases. The coating has high toughness and hardness and excellent wear resistance, can be adapted to different working conditions of mine machinery wear-resistant parts, the process is controllable, and is suitable for industrial production.

The application discloses a preparation process of B-Zr doped cobalt-based alloy powder and coating, and the alloy powder is composed of the following components with mass percentage: 90-95% of Stellite6, 1-5% of B and 1-5% of Zr. By introducing appropriate amounts of B and Zr elements into the Stellite6 alloy powder, the Zr and B elements synergistically alleviate the brittle boride to inhibit cracks, and synergistically form fine and dispersed ZrB2 and other stable high-hardness phases, promote the refinement of the structure, improve the hardness of the coating, and prevent B from forming a continuous network of brittle phases. The addition of the B element can also generate intermetallic compounds with Co elements and Cr elements, which have high hardness and high wear resistance, so that the overall strengthening layer hardness is improved. The finally formed high-hardness strengthening layer has a thickness of more than 0.5 mm and no cracks are generated. The hardness of the strengthening layer is more than 1100 HV, and the hardness of the strengthening layer can be more than 2-4 times of the substrate.

The invention relates to the technical field of glass mold manufacturing, in particular to a manufacturing method of a cobalt-based alloy glass mold punch, which adopts a cobalt-based alloy welding wire made of the same material as a punch body for surfacing, eliminates the material difference between a base material and a surfacing layer, and avoids the defects of insufficient interface bonding force, microcracks and the like. Interlayer stress concentration is reduced through the segmented symmetrical surfacing welding technology, the overall hardness of the punch is uniform, and the surface abrasion resistance is stable; the red copper rod serves as a built-in forming core mold, the forming space of the punch head is precisely limited, and the problem that the surfacing thickness of a complex curved surface is not uniform is solved. After surfacing, the requirement can be met by only needing a small amount of finish machining allowance, the machining cost is reduced, and the consistency of batch production is improved; the whole punch is made of a cobalt-based alloy material, the thermal expansion coefficient is uniform and consistent, and netlike cracks cannot occur under frequent hot and cold circulation. And the red copper core mold can rapidly conduct heat in the welding process, local overheating softening of a surfacing layer is avoided, and the adaptability of the punch under the ultrahigh-temperature working condition is improved.

The application discloses a hydrogen evolution catalytic material with a gamma prime phase nano array structure, and the hydrogen evolution catalytic material comprises a cobalt-based alloy base and a nano catalytic layer; the cobalt-based alloy base is a Co-xAl-yW alloy; wherein x and y are atomic percentages, the value range of x is 8-10, and the value range of y is 9-10; the nano catalytic layer is in-situ grown on the surface of the cobalt-based alloy base, the nano catalytic layer has a gamma prime phase nano array structure, and the gamma prime phase nano array structure is composed of gamma prime phase nano units in a rectangular array distribution. The hydrogen evolution catalytic material has high-density active sites and optimized hydrogen evolution reaction kinetics characteristics, has excellent catalytic activity, and realizes the double improvement of acid resistance and long-term stability by relying on the oxidation layer protection and the regular array structure, and fundamentally solves the technical pain point that the activity and stability of traditional non-noble metal catalysts are difficult to be considered.

The invention belongs to the technical field of cobalt-based alloy material preparation and processing, and particularly relates to a preparation method of a cobalt-based high-temperature alloy wire applied to brush type sealing, which is suitable for large-scale production of wires for brush type sealing under high-temperature and high-pressure working conditions in the fields of aerospace, energy power and the like. The method comprises the working procedures of alloy purification smelting, forging cogging, rolling forming, wire cold drawing and hot drawing, nitriding and the like. The cobalt-based high-temperature alloy wire prepared through the method is low in inclusion content, high in surface smoothness, high in hardness and abrasion resistance and low in manufacturing cost, the nitriding process can be regulated and controlled to balance the surface hardness and the core plasticity of the wire, and the customized use requirement of brush type sealing for brush wire materials is met.

The application belongs to the technical field of cobalt-based alloy material preparation and processing, and particularly relates to a cobalt-based high-temperature alloy wire preparation method applied to brush seal, which is suitable for the large-scale production of wire for brush seal under high-temperature and high-pressure working conditions in the fields of aerospace, energy power and the like. The method comprises alloy purification smelting, forging breakdown, rolling forming, wire cold drawing and hot drawing, nitriding and the like. The cobalt-based high-temperature alloy wire prepared by the method has low inclusion content, high surface smoothness, high hardness and high wear resistance, low manufacturing cost, and the nitriding process can be controlled to realize the trade-off between the surface hardness and the core plasticity of the wire, so that the customized use demand of brush wire material for brush seal is met.

The invention discloses a preparation process of B-Zr doped cobalt-based alloy powder and a coating. The alloy powder is prepared from the following components in percentage by mass: 90 to 95 percent of Stellite6, 1 to 5 percent of B and 1 to 5 percent of Zr. A proper amount of B and Zr elements are introduced into the Stellite6 alloy powder, the Zr and the B elements act synergistically to relieve brittle boride and inhibit cracks, fine and dispersed ZrB and other stable high-hardness phases are formed synergistically, structure refinement is promoted, the hardness of the coating is improved, B is prevented from forming a continuous net-shaped brittle phase, and the corrosion resistance of the coating is improved. An intermetallic compound generated by the element B, the element Co and the element Cr has high hardness and high wear resistance, so that the hardness of the whole strengthened layer is improved, the thickness of the finally formed high-hardness strengthened layer can reach 0.5 mm or above, no crack is generated, the hardness of the strengthened layer exceeds 1100 HV, and the hardness of the strengthened layer can reach 2-4 times or above of that of a matrix.