122 results about "Zr alloy" patented technology

The invention discloses a method and application for ultrasonic-assisted laser additive manufacturing of a multi-scale structure coupling high-toughness aluminum alloy, and the method comprises the steps that high-Ni-content alloy steel powder is refined through high-energy ball milling, and then the refined alloy steel powder is dispersed and distributed in Al-Mg-Sc-Er-Zr alloy powder; an ultrasonic energy field is introduced to assist selective laser melting to form mixed powder, the ultrasonic energy field assists in generating nonlinear effects such as cavitation, acoustic streaming and heat effect, defects such as air holes and cracks are overcome to eliminate residual stress, and the Marlangoni effect is accelerated to increase the solidification speed; and finally, the high-strength and high-toughness aluminum alloy which has high density and is composed of micron-scale, submicron-scale and nano-scale multi-scale phase structures is prepared. The production cost is low, and the room-temperature tensile properties of the prepared high-strength and high-toughness aluminum alloy are as follows: the strength is greater than 850 MPa, and the fracture strain is greater than 6%.

The invention provides natural color anodized aluminum alloy powder and a preparation method and application thereof, and belongs to the field of additive manufacturing. The method comprises the following steps: remelting an aluminum-silicon alloy and magnesium silicate to obtain an aluminum-magnesium-silicon alloy; a mixed raw material is prepared from an aluminum-magnesium-silicon alloy, pure magnesium, pure aluminum and an aluminum-zirconium alloy, and is formed based on ultrasonic suspension smelting and rapid cooling; the aluminum alloy powder comprises the following components in percentage by weight: 1.0-5.0% of Zr, 1.0-5.0% of Al, 1.0-5.0% of Zr, and the balance of aluminum. 0.4 to 1.0 wt% of Mg; 0.4 to 1.0 wt% of Si; the balance is Al and inevitable impurities; wherein the weight ratio of Si to Mg is 1: 1. The material can be used for additive manufacturing molded consumer electronics. According to the method disclosed by the invention, on the premise of reducing the types and the dosage of strengthening elements, the aluminum alloy which is uniform in structure, free of obvious segregation, isotropic in mechanical property, free of the problems of pits and layer lines after anodizing and free of color difference is prepared by adopting an ultrasonic suspension smelting and hypersonic inert gas atomization method.

The invention belongs to the field of medical titanium alloy material processing, and particularly relates to a preparation method of a high-strength titanium-zirconium alloy wire. The Ti-Zr alloy comprises the following chemical components in percentage by mass: 13.5-16.5% of Zr, less than or equal to 0.10% of Fe, less than or equal to 0.10% of C, less than or equal to 0.015% of H, less than or equal to 0.6% of O, less than or equal to 0.05% of N and the balance of Ti. Firstly, a round bar blank with a certain size is obtained through the procedures of smelting, forging and drawing; and then a finished wire is prepared in the modes of temperature-controlled drawing, stress relief annealing and centerless grinding. By means of the method, the high-strength titanium-zirconium alloy wire with Rm larger than or equal to 950 MPa and A larger than or equal to 10% can be obtained, the problems that the implant material Ti-Zr alloy is low in strength and the like are solved, the high-strength titanium-zirconium alloy wire for dental products can be produced through the method, and qualified raw materials are provided for the dental implant products.

The invention discloses a preparation method of an ultra-fine grain Ti-Zr alloy bar. The preparation method comprises the following steps: a, smelting: mixing and smelting titanium sponge, zirconium sponge and zirconium dioxide to obtain a cast ingot; b, heating the cast ingot to 1000-1050 DEG C, and forging the cast ingot into a bar billet through upsetting and drawing; c, the bar blank is heated to 800-850 DEG C, and the bar blank is subjected to radial forging; d, the bar blank is heated to 600-700 DEG C for the first time and forged in the Z direction; second heating is conducted to 600-700 DEG C, and forging is conducted in the X direction; third heating is conducted to 600-700 DEG C, and forging is conducted in the Y direction; e, the bar blank is heated to 400-500 DEG C, and hot rotary swaging is conducted; f, cold rotary swaging is conducted, specifically, the bar blank is annealed at the temperature of 300-400 DEG C, and then cold rotary swaging is conducted; and g, the bar is subjected to annealing treatment at the temperature of 400 DEG C to 500 DEG C, and the ultra-fine grain Ti-Zr alloy bar is prepared. According to the method disclosed by the invention, the ultrafine grain Ti-Zr alloy bar with small diameter and high strength is prepared, and the industrial application of the implant can be realized.

The invention relates to the technical field of superconducting material processing, in particular to a preparation method of an Nb3Sn superconducting wire. The method mainly comprises the steps that Nb-Zr alloy is loaded into the exterior and / or the center of a Sn-Cu single-core rod, oxide powder is filled between the Nb-Zr alloy and the Sn-Cu single-core rod, then the Sn-Cu single-core rod and the Nb-Zr alloy are loaded into a copper substrate, and Nb3Sn subcomponents are obtained after multi-pass stretching, forming and fixed-length cutting; and uniformly arranging the Nb3Sn sub-components in the copper pipe along the circumferential direction to form a bundle, and after multi-pass stretching, carrying out heat treatment and cutting to obtain the Nb3Sn superconducting wire. By introducing the artificial point pinning array in density gradient distribution, the critical current density of the Nb3Sn superconducting wire in a high magnetic field of 8T-16T is enhanced, the problems that an existing uniform artificial point pinning center scheme generates a matching effect and limits the actual application of the superconducting wire are solved, and the decline degree of the critical current density of the Nb3Sn superconducting wire in the high field is relieved.

The invention belongs to the technical field of laser cladding, and particularly relates to a titanium-zirconium alloy surface high-hardness corrosion-resistant laser cladding coating and a preparation method thereof.The preparation method comprises the steps that firstly, cladding materials are mixed; ti powder, Zr powder, Nb powder, Mo powder and elementary substance powder are put into a planetary ball mill according to the equal molar ratio, then the ball mill is started for powder mixing, and after powder mixing is finished, the powder is taken out and put into a vacuum drying box for vacuum drying storage; before cladding, the surface of a workpiece is pretreated according to the sequence of rough grinding, cleaning, flushing and scrubbing. According to the high-hardness corrosion-resistant laser cladding coating on the titanium-zirconium alloy surface and the preparation method, in the treatment process of a cladding material and a workpiece, the cladding material is subjected to ball-milling mixing treatment, so that elemental metal powder is mixed more uniformly, and the obtained laser cladding coating is more uniform in component, and the corrosion resistance of the coating is improved; and the prepared coating is subjected to heat treatment, so that the purpose of reducing cracks in the cladding layer is achieved.

The invention relates to the technical field of metallurgy preparation of heterogeneous materials, in particular to an efficient laser cladding preparation method of nickel-based superalloy on the surface of copper alloy, which comprises the following steps: increasing the absorptivity of the copper alloy to infrared laser through preheating, and carrying out laser cladding on GH3625 alloy on the surface of Cu-Cr-Zr alloy through regulating and controlling the components of a copper alloy / nickel alloy intermediate layer, so as to prepare the nickel-based superalloy on the surface of Cu-Cr-Zr alloy. And formation of a microstructure in the non-equilibrium solidification process is controlled, the process is optimized, and the mechanical property of the material is improved. According to the method, the intermediate layer is utilized to perform non-equilibrium state metallurgy preparation of the GH3625 alloy on the surface of the Cu-Cr-Zr base material, compared with the method without adding the intermediate layer, after the intermediate layer is added, the content of the copper element in a molten pool is increased, liquid-phase separation is promoted, a large-range Ni-Cr core shell is formed to serve as a low-energy nucleation site, crystal grains are refined, and the performance of the Cu-Cr-Zr alloy is improved. Further, a fine grain strengthening effect is achieved; the thickness of the element diffusion layer is also increased by adding the middle layer, the element uniformity is promoted, the dependence on Malangori is reduced, the heat input is reduced, the optimization of process parameters is realized, and the mechanical property of the heterogeneous material is further improved.

The invention discloses a high-strength corrosion-resistant Al-Zn-Mg-Cu-Sc-Zr alloy plate and a preparation method thereof, and belongs to the technical field of aluminum alloy materials. The alloy comprises the following components in percentage by mass: 7.0%-8.0% of Zn, 1.5%-2.0% of Mg, 1.4%-1.8% of Cu, 0.05%-0.15% of Sc, 0.05%-0.15% of Zr, less than or equal to 0.05% of Si, less than or equal to 0.1% of Fe, less than or equal to 0.01% of Mn, less than or equal to 0.01% of Cr, less than or equal to 0.01% of Ti and the balance of Al. The preparation method comprises the steps of smelting and pouring, homogenizing annealing, hot rolling, cold rolling and solid solution aging treatment. By synergistically adding Sc and Zr, a nanoscale Al3 (Sc, Zr) dispersed phase is formed, recrystallization is inhibited, grains are refined, meanwhile, grain boundary precipitated phase distribution is optimized, and the mechanical property and corrosion resistance of the alloy are improved. The tensile strength of the obtained alloy plate reaches 590 MPa or above, the yield strength reaches 540 MPa or above, the intergranular corrosion depth is smaller than or equal to 23 micrometers, the exfoliation corrosion depth is smaller than or equal to 117 micrometers, the corrosion current density is smaller than or equal to 0.53 microamperes / cm < 2 >, and the comprehensive performance is obviously superior to that of a traditional Al-Zn-Mg-Cu alloy.

The invention discloses a Ti-Nb-Zr / MAX phase / Cr-C-N multi-layer composite coating bipolar plate and a preparation method thereof. The multi-layer composite coating sequentially comprises a Ti-Nb-Zr alloy transition layer, an MAX phase middle layer and a Cr-C-N nano composite surface layer from inside to outside. According to the Ti-Nb-Zr / MAX phase / Cr-C-N multi-layer composite coating bipolar plate and the preparation method thereof, through the synergistic effect of the Ti-Nb-Zr alloy transition layer, the MAX phase middle layer and the Cr-C-N nano composite surface layer, the comprehensive optimization of the coating performance is realized: the Ti-Nb-Zr alloy transition layer provides excellent matrix adhesive force and stress buffer effect; the MAX-phase intermediate layer provides a main corrosion-resistant barrier and self-repairing capability; the Cr-C-N nano composite surface layer provides low contact resistance and good surface stability; and meanwhile, the interlayer stress is effectively reduced by utilizing the gradient transition region, the bonding strength and long-term stability of the coating are improved, and the comprehensive performance of the multi-layer composite coating bipolar plate is effectively improved.

The invention belongs to the field of additive manufacturing of titanium alloys, relates to a 3D printing high-toughness titanium alloy and a preparation method thereof, and solves the problem of poor plasticity of the existing Ti-Zr alloy. The Ti-Zr-O high-toughness titanium alloy comprises the following chemical components in percentage by mass: less than or equal to 0.01% of C, 0.46-0.5% of O, 1-2% of Zr, less than or equal to 0.015% of H, less than or equal to 0.02% of N and the balance of Ti and inevitable impurities. According to the Ti-Zr-O high-toughness titanium alloy finally obtained through the method, the density reaches 99.8% or above, the tensile strength is larger than or equal to 1150 MPa, the yield strength is larger than or equal to 1050 MPa, and the ductility is larger than or equal to 21%. According to the Ti-Zr-O high-toughness titanium alloy, solid solution elements oxygen and zirconium serve as strengthening elements, common solid solution elements such as W, Mo and Nb are replaced, a Ti-Zr-O high-toughness titanium alloy product is prepared, the strength and plasticity of the Ti-Zr-O high-toughness titanium alloy product are remarkably superior to those of a traditional titanium-zirconium alloy product, the cost of the high-toughness titanium alloy is greatly reduced, and the Ti-Zr-O high-toughness titanium alloy is suitable for industrial production. The method can achieve the purposes of low cost and high performance, and is suitable for large-scale production.

The invention discloses a high-performance wide precision zirconium alloy strip as well as a preparation method and application thereof. By strictly controlling the content of key elements in the zirconium alloy raw material and the structure before cold rolling, the deformation resistance is reduced, and the processing plasticity is improved; the material, the roll shape curve and the surface quality of a cold rolling working roll suitable for cold rolling of the zirconium alloy strip are strictly controlled, the rolling stability is improved, the strip thickness-rolling parameter matching relation is established in stages, the pass deformation is improved, and work hardening is reduced; small-angle oblique welding seam tailor-welding is adopted, so that welding seams sequentially pass through a rolling deformation area, the average unit pressure of the welding seams is reduced, welding seam cracking is reduced, tailor-welding coiling cold rolling stable control over the wide precision zirconium alloy strip is achieved, and machining of the precision strip with the width larger than or equal to 500 mm and the thickness smaller than or equal to 0.2 mm can be achieved.

The invention discloses a method for preparing a Zr-3 cast ingot by using zirconium scrap-shaped residual materials. The method comprises the following steps: 1, collecting Zr-1 and Zr-3 scrap-shaped residual materials, and carrying out classified storage; 2, crushing to obtain flaky scraps; 3, sieving, magnetic separation and manual separation; 4, cleaning and airing to obtain zirconium scraps with pollution-free surfaces; 5, pressing the zirconium scraps into an electrode block, and welding to obtain a consumable electrode; and sixthly, the consumable electrode is smelted, and the finished Zr-3 cast ingot is obtained. According to the method, zirconium scrap-shaped residues of different marks generated in different machining processes are stored in a classified mode, matching is conducted according to different scrap-material oxygen content empirical values in different proportions, it is guaranteed that the oxygen content of Zr-3 cast ingots is controllable, the density and strength of consumable electrodes are guaranteed in combination with large-tonnage pressing, total recovery of the zirconium scrap-shaped residues is achieved, and the production cost is reduced. And the recycled Zr-3 cast ingot meeting the requirements of GB / T 26314-2010'zirconium and zirconium alloy grade and chemical composition 'is obtained.

A brake rotor for a motor vehicle having a composite structure may include an annular body defining opposite friction surfaces of the brake rotor. The annular body may include a core made of a lightweight, magnesium-based alloy; a thermal barrier layer made of a thermally insulating material disposed on the core; and a wear-resistant layer made of an Al—Fe—Si—Zr alloy of aluminum (Al)+iron (Fe)+silicon (Si)+zirconium (Zr) that is disposed on the core over the thermal barrier layer. The wear-resistant layer may define a first one of the opposite friction surfaces of the annular body.

The invention discloses a high-conductivity high-strength copper alloy thermal mechanical treatment strengthening process which comprises the following steps: firstly, heating a Cu-Ni-Be-Zr alloy cast ingot to 890-980 DEG C until the core part of the cast ingot reaches a set heating temperature, then compressing the cast ingot, carrying out water cooling at room temperature, and finally carrying out aging treatment and air cooling on the cast ingot at 480 DEG C * 3-480 DEG C * 8 hours; the Cu-Ni-Be-Zr alloy comprises the following components in percentage by weight: 1.6 to 2.5 percent of Ni, 0.25 to 0.5 percent of Be, 0.05 to 0.2 percent of Zr, not more than 0.1 percent of impurities and the balance of Cu. According to the method, the cast ingot of the Cu-Ni-Be-Zr alloy is directly subjected to thermal mechanical treatment and then subjected to aging, the process steps of forging, solid solution treatment and cold deformation in a traditional process are omitted, the performance of the treated Cu-Ni-Be-Zr alloy is basically consistent with that of the alloy obtained after the traditional production process is adopted, and therefore the Cu-Ni-Be-Zr alloy is obtained. The thermomechanical treatment combines the advantages of hot working and mechanical deformation, and the microstructure and performance of the alloy can be more efficiently improved.

The application belongs to the technical field of non-ferrous metal materials, and particularly discloses a method for preparing high-strength and high-conductivity nano-heterostructure copper-chromium-zirconium alloy through multi-stage deformation and multi-stage aging. The copper-chromium-zirconium alloy has a composition by mass percentage of Cr: 0.5wt%-1.0wt%, Zr: 0.05wt%-0.1wt%, and the balance being copper. The method obtains a new microstructure structure, i.e. a composite structure composed of nano-crystal, nano-twin crystal, nano-precipitated phase and grown micro-precipitated phase. The nano-crystal matrix has a certain component of nano-twin crystal, and is uniformly and diffusely distributed with nano-precipitated phase and part of grown precipitated phase. The new type of copper alloy has a tensile strength of 750MPa-850MPa and an electric conductivity of 75%-80% IACS, and can meet the demand of the electrical and power industries for high-performance copper-chromium-zirconium alloy.

The invention provides a high-plasticity Mg-Sn-Zn-Zr alloy and a preparation method thereof, and belongs to the technical field of magnesium alloy deformation processing. The preparation method of the high-plasticity Mg-Sn-Zn-Zr alloy, provided by the invention, comprises the following steps: directly carrying out positive extrusion deformation treatment on an as-cast alloy, and then carrying out differential-temperature equal-channel angular extrusion deformation treatment to obtain the high-plasticity Mg-Sn-Zn-Zr alloy, during the differential temperature equal channel angular pressing deformation treatment, the temperature of the alloy is 100-150 DEG C, and the temperature of the mold is 300-350 DEG C. According to the method, during differential-temperature equal-channel angular pressing deformation treatment, the alloy and the mold are both heated, so that after differential-temperature equal-channel angular pressing deformation treatment is carried out, a double-heterostructure in which coarse and fine crystal double-peak crystal grains and a second phase of a harmonic-like structure coexist is formed, and the alloy performance is remarkably improved; and the ductility of the high-plasticity Mg-Sn-Zn-Zr alloy is as high as 37.9%.

The invention relates to a biomedical zirconium alloy with ultralow elastic modulus and a preparation method thereof. The alloy comprises the following three alloy elements in percentage by mass: 71 to 80 weight percent of Zr, 20 weight percent of Nb, 1 to 9 weight percent of Ta and the balance of inevitable impurities. In the preparation process, by regulating and controlling the Ta content and combining three-stage solid solution-aging quenching heat treatment, the beta-Zr phase is effectively stabilized, and collaborative optimization of the elastic modulus and the strength of the alloy is achieved. According to the alloy obtained through the method, along with the increase of the Ta content, the tensile strength of the alloy is in the trend that the tensile strength is firstly increased and then decreased, and the elastic modulus is firstly decreased and then increased; when the Ta content is optimal, the lowest elasticity modulus of the alloy can reach 15.2 GPa, the tensile strength peak value can reach 861 MPa, the stress shielding effect is remarkably inhibited, and the mechanical matching property with bone tissues and the long-term stability of implants are greatly improved.

A brake rotor for a motor vehicle having a composite structure may include an annular body defining opposing friction surfaces of the brake rotor. The annular body may include a core made of a lightweight magnesium-based alloy, a thermal barrier layer made of a heat-insulating material disposed on the core, and a wear-resistant layer made of an Al-Fe-Si-Zr alloy of aluminum (Al) + iron (Fe) + silicon (Si) + zirconium (Zr) disposed on the core over the thermal barrier layer. The wear-resistant layer may define a first of the opposing friction surfaces of the annular body.

The invention discloses an efficient Zr-containing grain refiner for magnesium alloy and application of the efficient Zr-containing grain refiner. In particular to a magnesium alloy efficient Zr-containing grain refiner, the Zr-containing grain refiner comprises Zr and other alloy elements, and the other alloy elements are selected from one or more of Zn and Ca. The invention further discloses application of the Zr-containing grain refiner in refining treatment of magnesium alloy. The low-melting-point binary or multi-element Zr-containing intermediate alloy grain refiner is prepared through the method, the magnesium alloy melt is refined, rapid dissolution and diffusion of Zr in the magnesium alloy melt can be achieved at the low Zr alloying temperature, the refining effect of Zr on magnesium alloy is greatly improved, the refining decline effect of Zr is improved, and the magnesium alloy refining effect is improved. And the technical scheme is simple, and is very suitable for industrial popularization and application.

The application relates to a preparation method of a titanium alloy particle reinforced rare earth magnesium-based composite material and a product, and belongs to the technical field of magnesium alloy materials. The method specifically comprises the following steps: firstly, ball milling TC4 titanium alloy spherical powder and Mg-Gd-Zn-Zr alloy powder under a protective atmosphere to obtain mixed powder; then, hot-pressing sintering the mixed powder in a mold to obtain a blank; and finally, solid-solution and aging treatment of the blank and cooling to room temperature. The TC4 particles are selected as reinforcing bodies, a hot-pressing sintering process and a heat treatment process are combined, and finally, a rare earth magnesium alloy with high comprehensive mechanical properties is prepared. The preparation process is simple, energy consumption is lower, production time is shorter, and the cost is low, which is beneficial to industrialized large-scale production, has a good application prospect and economic benefits.

The invention relates to the technical field of new materials, in particular to an Al-Cu-Li-Mg-Ag-Zn-Mn-Zr series high-strength and high-heat-resistance aluminum lithium alloy and a preparation method thereof. According to the invention, Al-Cu-Li-Mg-Ag-Zn-Mn-Zr is used as an alloy system, a certain amount of Cu, Li, Mg and Ag alloy elements are added to obtain a core-shell structure strengthening phase T1-AgMg phase which is stable at a high temperature, a certain amount of Zn element is added to improve the intrinsic stability of the T1 phase, and a certain amount of Mn and Zr alloy elements are added to obtain strengthening phases of a T phase and an Al3Zr phase. The novel high-strength and high-heat-resistance aluminum-lithium alloy with excellent tensile property at room temperature, 250 DEG C and 300 DEG C is obtained by combining proper preparation processes such as casting, homogenization, thermal deformation, solid solution aging and the like.

The invention discloses a high-strength and high-conductivity Cu-Zr-Cr alloy and a preparation method thereof, and belongs to the technical field of copper alloy materials. The alloy comprises the following components in percentage by weight: 0.4%-0.6% of Zr, 0.3%-0.5% of Cr and the balance of Cu and inevitable impurities. The preparation method comprises the steps of burdening, vacuum induction electromagnetic suspension smelting and solidification, annealing treatment, cold rolling deformation, aging treatment, ultrasonic vibration synergistic alternating magnetic field treatment under the ultralow temperature condition and low-temperature annealing treatment. According to the invention, by optimizing component design and cooperating with a multi-step process, especially by introducing ultrasonic vibration to cooperate with alternating magnetic field treatment under an ultralow temperature condition, a composite reinforced structure of high-density nano twin crystals and dispersively distributed nano-scale precipitated phases is successfully constructed in the alloy, and cooperative improvement of strength and conductivity is realized. The process route is clear, parameters are controllable, repeatability is good, the problem that strength and conductivity of traditional Cu-Zr alloy are difficult to consider at the same time is solved, and the method is suitable for large-scale preparation and application of high-performance copper alloy.

The application relates to a high-strength high-conductivity Cu-Zr alloy material added with trace elements and a preparation method thereof, and belongs to the technical field of copper alloy preparation and processing. The multiple strengthening mechanisms of the time aging strengthening of the micron and nanometer size precipitated phase formed by the combination of elements such as Si and Zr, the solid solution strengthening of atoms, and the work hardening caused by cold deformation are superposed, so that high strength is achieved. The copper alloy is prepared mainly through a combined deformation heat treatment process, has high strength and excellent electrical conductivity and plasticity, and the thermal stability of the alloy is improved. The copper alloy can be used as a lead frame and a rectifier device and applied to advanced fields such as rail transit and electrical electronics.

The invention discloses a self-adaptive anti-oxidation composite coating and a manufacturing method thereof, and belongs to the field of heat-resistant coatings. The coating includes a base layer, a forming layer, and a protective layer. Wherein the substrate layer is a bottom layer, and the component of the substrate layer is pure Cr; the forming layer is arranged on the substrate layer, is of a crystalline structure and contains Cr, Si and O; the protection layer is an amorphous SiO2 layer generated on the surface of the formation layer in situ; and the forming layer and the protective layer comprise the following average components in percentage by weight: 0.5-2% of Si, 0.55-1.3% of O and the balance of Cr. The coating has good oxidation resistance, and can effectively improve the reliability of zirconium alloy workpieces under accident conditions.

The invention provides a porous CuCrZr alloy and a preparation method thereof, and relates to the technical field of alloy preparation, and the preparation method comprises the following steps: preparing a porous CuCrZr alloy blank by adopting a selective laser melting process; the porous CuCrZr alloy is subjected to plasma polishing treatment, and a porous CuCrZr alloy blank obtained after plasma polishing treatment is obtained; wherein the surface roughness of the porous CuCrZr alloy blank is reduced by more than 70% through the plasma polishing treatment; and carrying out heat treatment on the porous CuCrZr alloy blank subjected to plasma polishing treatment to obtain the porous CuCrZr alloy. It needs to be explained that surface impurities and protrusion defects are removed through plasma polishing, so that the surface roughness is reduced by 70% or above, and high smoothness of hole walls is achieved; and a compact protective film is formed, the surface protection performance is preliminarily improved, the film can preliminarily block corrosion of the external environment to the base body, a protective barrier is provided for subsequent heat treatment, and surface over-oxidation in the heat treatment process is avoided.

The application discloses a high-strength and high-conductivity copper-tin alloy wire capable of resisting high-temperature softening and a preparation process thereof, and the copper-tin alloy wire comprises the following raw materials in percentage by mass: Sn 0.25-0.35 wt.%; Zr 0.15-0.35 wt.%, and the balance of Cu and inevitable impurities. The Cu-Sn-Zr alloy wire has a tensile strength of more than 700 MPa, an electrical conductivity of more than 75% IACS, and a softening resistance temperature of more than 400 DEG C, and can meet the use requirements of the high-strength and high-conductivity Cu-Sn alloy wire at high temperature. After deformation heat treatment of the alloy rod is completed, the alloy rod is subjected to gradual cooling treatment through a special gradual cooling device, so that problems such as thermal cracks in the cooling process are avoided, and the quality of the alloy rod product is ensured.

The application discloses a kind of corrosion-resistant iron cobalt alloy strip and its preparation and surface synergistic strengthening method, belong to soft magnetic alloy magnetic material heat treatment field.Corresponding to iron cobalt vanadium alloy magnetic corrosion repulsion, magnetic performance attenuation under salt spray / fuel methanol corrosion, component segregation, annealing difficult to consider magnetic mechanical pain point, optimize Fe-Co-V-Cr-Mo-Nb / Ta / Zr alloy component and build proportioning model;Using double-section vacuum melting, hydrogen homogenization, multi-pass temperature control cold rolling regulation and control grain;Design magnetic and mechanical dual-mode magnetic annealing;Constructing passivation layer-MgO insulation layer-organic-inorganic anticorrosion layer three-layer coating synergistic strengthening.The finished product Bs≥2.2T, Hc≤200A / m, 96h salt spray 150h fuel methanol immersion after magnetic performance attenuation≤3%, adjustable strength, replace VACODUR / VACOFLUX alloy strip, adapt to vehicle-mounted electromagnetic actuator, high-speed motor, ocean device high-frequency transformer scene, mass production stability.

The invention belongs to the technical field of material forming, and relates to a zirconium alloy die forging die and a design method thereof. The design method comprises the following steps: firstly, determining thermal deformation performance and heat transfer performance of a zirconium alloy sample, and fitting to obtain an elastic-plastic constitutive model of the zirconium alloy sample; then, simulation analysis is conducted on the die forging process of the zirconium alloy sample based on finite element simulation software, finally, iterative optimization is conducted on the size design of the die forging die according to a simulation result, and design of the zirconium alloy die forging die is completed. The zirconium alloy die forging die is designed through the method, the design process is simplified, the method has the advantages of being high in preparation efficiency, capable of saving cost and the like, the designed die forging die better conforms to the material characteristics of zirconium alloy materials, and zirconium alloy die forgings higher in size precision, more excellent in mechanical property and more uniform in microstructure can be designed through the die forging die.

The invention provides a high-strength Mg-Sm-Zn-Zr alloy and a preparation method and application thereof, and belongs to the technical field of magnesium alloy manufacturing. According to the method, through the mode of combining ultrahigh pressure and specific high temperature (800-1200 DEG C), accurate regulation and control over the grain structure are achieved, an ultra-fine grain structure far exceeding the conventional heat treatment level is obtained, and the fine grain structure formed by the magnesium alloy subjected to ultrahigh-pressure heat treatment under the ultrahigh pressure is more stable; the optimal process window is determined by optimizing parameters of ultrahigh pressure heat treatment, accurate process guidance is provided for subsequent research, energy waste is avoided, and optimal performance is ensured. The result of the embodiment shows that when the temperature of the ultrahigh pressure heat treatment is 1000 DEG C, the microstructure of the high-strength Mg-Sm-Zn-Zr alloy provided by the invention is the best, and the mechanical property is the highest.

This invention relates to the field of superconducting material processing technology, specifically to a method for preparing Nb3Sn superconducting wires. The invention mainly involves inserting an Nb-Zr alloy into the exterior and / or center of a Sn-Cu single-core rod, filling the space between the Nb-Zr alloy and the Sn-Cu single-core rod with oxide powder, and then inserting it into a copper substrate. After multiple passes of stretching, forming, and length-cutting, Nb3Sn sub-components are obtained. These Nb3Sn sub-components are then uniformly arranged circumferentially within a copper tube to form a bundle, followed by multiple passes of stretching, heat treatment, and cutting to obtain the Nb3Sn superconducting wire. This invention enhances the critical current density of the Nb3Sn superconducting wire under high magnetic fields of 8T–16T by introducing an artificially pinned array with a density gradient distribution. This solves the problem of the matching effect produced by existing uniform artificially pinned center schemes, which limits the practical application of superconducting wires, and alleviates the decrease in critical current density of Nb3Sn superconducting wires under high fields.