92 results about "Cobalt based alloy" patented technology

The invention belongs to the technical field of cobalt-based alloy machining, and particularly relates to high-strength cobalt-based alloy rolling machining equipment which comprises a rack and a cooling system, an upper roller and a lower roller are installed on the rack, one end of the rack is fixedly connected with a first motor, and the first motor is connected with the end of the lower roller through a reduction gearbox; and the other end of the lower roller is mounted on the bearing seat. The device further comprises a thickness acquisition module and a stress acquisition module. The thickness acquisition module and the stress acquisition module are used for monitoring the thickness and rolling pressure fluctuation of a rolled plate in real time, the control module is used for generating a corresponding fluctuation coefficient, and the thickness fluctuation coefficient and the stress fluctuation coefficient are comprehensively analyzed to generate an evaluation coefficient; and the roller spacing, the rolling speed and the working state of a cooling system are dynamically adjusted according to the evaluation result, so that the rolling process can adapt to material characteristics and working condition changes, the thickness uniformity of rolled plates is effectively improved, and the adverse effect caused by abnormal fluctuation of rolling pressure is reduced.

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.

The invention relates to an oxygen evolution electrode of a nickel-iron-cobalt-based alloy coating and a preparation method of the oxygen evolution electrode, the oxygen evolution electrode is composed of a conductive substrate and an alloy coating which is deposited on the surface and takes Ni, Fe and Co as main metal elements and takes at least one of Mn, Cr, Cu, Mo, W, Ti, Al or Zn as an additional metal element, the preparation method adopts a spraying process, and the nickel-iron-cobalt-based alloy coating is deposited on the conductive substrate. The nickel-iron-cobalt-based alloy coating of the oxygen evolution electrode is well combined with the conductive substrate, the microstructure is controllable, the oxygen evolution electrode is suitable for large-area preparation, the structure formed through element synergy and the spraying process has excellent oxygen evolution catalytic activity and stability, the preparation process is flexible, the cost is low, and large-scale production is easy. And an effective way is provided for development of a high-performance and large-size OER catalyst.

To provide a new multilayer thin film exhibiting a tunnel magnetoresistance effect.SOLUTION: The present invention is a multilayer thin film having an insulating layer and a magnetic layer sandwiching the insulating layer. At least one of the magnetic layers is made of a Co-based alloy containing Al and / or Ga. For example, Co is contained in an amount of 58.5 to 63 at% with respect to the entire Co-based alloy. The Co-based alloy constituting a magnetic layer may be a β phase. The insulating layer is, for example, MgO or MgAl2O4. The magnetic layer on the other side of the insulating layer may be CoFeB (alloy) in addition to CoAl. Each layer is formed by sputtering, and planarization, crystallization, and the like are performed by heat treatment. A magnetic tunnel junction (MTJ) having the multilayer thin film of the present invention exhibits a high magnetoresistance change ratio (MR ratio), and can be applied to a next-generation magnetoresistance memory (MRAM) or the like.SELECTED DRAWING: Figure 3

The invention discloses cobalt-based alloy powder and application thereof, and belongs to the technical field of metal alloy materials. The cobalt-based alloy powder comprises the following components in percentage by mass: 0.2 to 0.6 percent of C, 2.0 to 3.0 percent of Si, 2.0 to 3.0 percent of Fe, 25.0 to 32.0 percent of Cr, 5.0 to 7.0 percent of Mo, 1.0 to 3.0 percent of Mn, 0.1 to 9.0 percent of W, 2.0 to 12.0 percent of Ni and the balance of Co and inevitable impurities. The cobalt-based alloy powder provided by the invention can be used for repairing a nut column through laser cladding, a cladding layer without cracks, air holes, inclusions and other defects on the surface and the interior can be obtained after cladding under certain laser power, the average Vickers hardness of the cladding layer can reach 434.3 Hv, meanwhile, the cobalt-based alloy powder has excellent wear resistance, and the service life of the cladding layer is prolonged. The method has remarkable advantages in the aspect of improving the material surface performance, and is suitable for various repair scenes needing high hardness and wear resistance.

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.

The invention discloses a cobalt-based alloy powder production device for hard alloy and a preparation method of the cobalt-based alloy powder production device, and relates to the technical field of alloy powder production, the cobalt-based alloy powder production device comprises a smelting furnace and a gas atomization reaction furnace connected with the smelting furnace, and further comprises grinding and screening equipment connected with the gas atomization reaction furnace, a rotating groove is formed in the side wall of the box body, a door plate located on the outer side of the rotating groove is fixed to the side wall of the box body, a rotating frame is arranged in the rotating groove, a plurality of device grooves are formed in the inner wall of the rotating frame in a penetrating mode and arranged at equal intervals in the circumferential direction of the rotating frame, and a screening mechanism is arranged on the inner wall of each device groove. The cobalt-based alloy particle circular grinding device can automatically complete circular grinding machining of cobalt-based alloy particles, full grinding can be achieved through the closed-loop circular design, the grinding efficiency is greatly improved, meanwhile, the screening efficiency of the cobalt-based alloy particles can be effectively improved, and meanwhile the problem that a screen plate is prone to being blocked is greatly solved.

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 present application belongs to the technical field of cobalt-based alloy material processing, and relates to a preparation method of high-strength cobalt-based alloy wire, in particular to a cold processing method of high-strength cobalt-based alloy wire. The present application realizes the whole-process cold drawing of cobalt-based alloy wire φ3.0mm-φ0.2mm by controlling the pass deformation amount to be 8%-16%, the heat deformation amount to be 35%-60%, and cooperating with specific heat treatment mode and cold drawing die, the drawing speed reaches 10-35m / min, the prepared cobalt-based alloy wire has high strength, good metallographic structure, high uniformity, and the yield is up to more than 60%. The cold drawing production process of the present application overcomes the problems of poor plasticity and difficult deformation of cobalt-based high-temperature alloy, and the γ phase is transformed into ε phase during the drawing process, thereby improving the strength of the cobalt-based high-temperature alloy.

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.

The invention provides cobalt-based alloy powder and a preparation method thereof. The cobalt-based alloy powder comprises, by weight, 20%-30% of chromium, 3%-8% of molybdenum, 3%-8% of tungsten, 0-2% of aluminum, 0-2% of titanium, 0-0.5% of boron, 0.1%-0.4% of carbon, 0.05%-0.2% of nitrogen and the balance cobalt. According to the cobalt-based alloy powder and the preparation method thereof, the prepared cobalt-based alloy powder is high in hardness and wear resistance and good in plasticity and toughness, a more compact and stable oxidation film can be formed on the surface of cobalt-based alloy, and the oxidation film can prevent oxygen from further contact with an alloy matrix, reduce the oxidation rate and improve the oxidation resistance of the alloy; according to the preparation method, the high-performance cobalt-based alloy powder meeting the requirements of different application scenes can be stably prepared, and the cobalt-based alloy powder shows excellent characteristics in the aspects of mechanical performance, high-temperature performance, corrosion resistance and the like and has wide market application prospects.

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.

The present invention belongs to the technical field of high-purity nickel strip processing and preparation for the electronics industry, and discloses a method for preparing a wear-resistant cobalt-based alloy mold for punching metal nickel strips. The inventive method uses vacuum induction melting of the cobalt-based alloy, and then uses high-purity nitrogen as the atomization deposition medium to perform double-scanning atomization deposition. After the double-scanning atomization deposition is completed, the cobalt-based alloy deposition blank is raised to the atomization nozzle, and heated nitrogen is blown through the nozzle of the guide tube to the top center of the cobalt-based alloy columnar deposition blank. At the same time, the deposition blank is slowly lowered at a speed of 10 to 15 mm / min. When the surface temperature of the blank is lower than 800°C, the blowing is stopped, and the blank is cooled with the furnace. The obtained deposition blank is heated, forged, and machined to obtain a cobalt-based alloy mold. The method of the present invention helps to improve the wear resistance and service life of the pure nickel strip punching die, improve product quality, and meet the needs of the electronics, energy batteries and other fields.

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 present invention discloses a cobalt-based alloy powder and a method for strengthening a substrate to achieve high-temperature resistance, relating to the field of strengthening technology. Specifically, a cobalt-based alloy powder is disclosed: comprising: 0.9%-1.2% Ni, 0.9%-1.2% Si, 0.9%-1.0% Mn, 30.4%-31.2% Cr, 3.9%-4.4% W, 0.9%-1.3% C, 1%-1.2% B, with the balance being Co. Also disclosed is a strengthening method, comprising cladding cobalt-based alloy powder A onto the substrate to form a transition layer; and cladding the cobalt-based alloy powder onto the transition layer to form a high-temperature-resistant layer. Cobalt-based alloy powder is combined with laser cladding to strengthen the base, which strengthens the substrate to improve the base's high temperature resistance, wear resistance, and corrosion resistance. In addition, the metal elements such as Co, Cr, W, and Ni contained in this cobalt-based alloy powder can generate various carbides during the laser cladding process, becoming a strengthening layer of the laser cladding layer, effectively improving the hardness, and then a higher hardness strengthening layer can be obtained compared to conventional cobalt-based alloy powder.