298 results about "Vacuum annealing" patented technology

The invention relates to a magnetic field sensor based on a room-temperature two-dimensional magnetic semiconductor material and a preparation method and application thereof, and the preparation method comprises the steps: arranging two electrodes which are not communicated with each other on an insulating substrate, obtaining a layered iron gallium tellurium material, transferring the layered iron gallium tellurium material to the insulating substrate, enabling at least one layered iron gallium tellurium material to be separated from the insulating substrate, and enabling the layered iron gallium tellurium material to be separated from the insulating substrate. The first product covers the two electrodes at the same time, tetrabutylammonium cations or oxygen plasmas are used for carrying out an intercalation reaction on the layered iron gallium tellurium material of the first product, and the layered iron gallium tellurium material of the first product is converted into an intercalated layered iron gallium tellurium material; and performing vacuum annealing to obtain the magnetic field sensor. The sensor provided by the invention reflects the magnetic field intensity by using the polarized light current between the electrodes, and can realize wide-range and high-precision magnetic field detection.

The invention discloses an anode material for adipic acid monoester electrolysis and a preparation method of the anode material, the electrode solves the key problems that a platinum layer is easy to fall off, the catalytic activity is low, the organic matter poisoning resistance is poor and the like of a traditional titanium platinum-plated electrode through multi-scale interface strengthening and nano structure regulation and control; the preparation method comprises the following core steps: constructing a porous ZrO2-TiO2 composite oxide layer on the surface of a titanium substrate by adopting a micro-arc oxidation-hydrothermal composite process, and generating platinum nanoparticles in situ to pre-fill pores, so that the anchoring effect of a platinum layer is remarkably enhanced; depositing a platinum / carbon nano tube (Pt / CNT) composite catalyst layer on the surface of the oxide layer through a pulse-ultrasonic synergistic electroplating technology, wherein the carbon nano tube is used as a conductive framework to inhibit platinum agglomeration; through vacuum annealing and electrochemical activation treatment, the interface bonding force and active site exposure are further optimized; the electrode shows excellent performance in an adipic acid monoester electrolysis system, and efficient electrocatalytic conversion from adipic acid monomethyl ester to dimethyl sebacate is achieved.

The invention provides a preparation method of a small-caliber titanium-steel composite pipe, which comprises the following steps: firstly, carrying out pipe bending forming on a titanium-steel composite plate by adopting a JCO process, and then carrying out titanium-titanium and steel-steel welding to obtain a titanium-steel composite welded pipe; and then annealing the titanium steel composite welded pipe obtained in the previous step, and then carrying out cold machining and vacuum annealing to obtain the small-caliber titanium steel composite pipe. The cold processing comprises cold rolling and / or cold drawing. According to the preparation method of the small-caliber titanium-steel composite pipe, the technical difficulty of direct compounding is reduced, the welding operation problem of small-caliber pipe titanium on the inner side is avoided, and meanwhile, the appearance precision of a cold-drawn product is higher. According to the method, the bonding strength can be guaranteed, high-precision control is achieved, and continuous and large-scale production capacity can be achieved. By the adoption of the mode, the high-precision titanium steel composite pipe with the diameter smaller than 300 mm can be obtained, and the average economic benefit can reach 0.5 million yuan / ton.

The invention discloses a manufacturing method of a high-precision intelligent instrument measuring chip and a related device. The method comprises the following steps: firstly, performing multi-stage vacuum annealing and atomic layer reduction corrosion removal on lower-layer copper interconnection, introducing thermal-electric synergistic stress to convert a vacancy-rich layer into < 111 > preferred grains, and obtaining a bonding preparation surface with consistent crystal orientation; and then low-temperature copper-copper thermocompression bonding is completed in a controlled inert atmosphere, and interconnection initial thermoelectric force is intercepted in real time. The method comprises the following steps: establishing a vertical heat flow according to a space mapping power consumption sequence by driving an upper-layer functional region, collecting an interface voltage response, and extracting an interconnection Seebeck deviation through time sequence registration and differential processing; and according to a deviation result, synchronous fusing and parallel connection are implemented by using a programmable metal section of the rewiring layer, a thermoelectric balance interconnection network is constructed, and a zero drift calibration value is written in. According to the scheme, direction-dependent thermoelectromotive force is eliminated in a closed mode on the three levels of material, measurement and interconnection reconstruction, and therefore long-term zero drift stability of a measurement chain is guaranteed under the nanovolt-level noise condition.

The invention provides a production method of a cold-rolled titanium steel composite plate coil. Industrial production is achieved through the following steps that S1, the titanium steel composite plate coil is selected as a cold-rolled raw material; s2, removing the titanium layer at the head and the tail of the raw material to expose the steel base material, and welding the steel base material with the stainless steel leading tape; s3, a continuous annealing furnace is adopted for annealing the composite plate coil welded in the step S2, shot blasting is carried out after annealing, and acid pickling is carried out after shot blasting; a reversible reciprocating rolling mill is adopted for rolling, a constant rolling force mode is adopted for cold rolling, the accumulative deformation is controlled to be 50%-75%, and the single pass is smaller than or equal to 15%; s5, degreasing the cold-rolled composite plate coil; s6, carrying out multi-step vacuum annealing on the degreased composite plate coil; s7, flattening the composite plate roll subjected to vacuum annealing; and S8, the flattened composite plate coil is pulled and straightened, and the cold-rolled titanium steel composite plate coil is prepared. According to the method, the continuous production of the cold-rolled titanium steel composite plate coil with good performance can be realized by adopting a conventional production line without first-pass heavy reduction or a special powerful rolling mill.

The invention provides an antenna oscillator production method, an antenna oscillator and communication equipment, and the method comprises the following steps: S1, material pretreatment: selecting a high-conductivity titanium-aluminum alloy plate, eliminating initial stress through vacuum annealing, and after annealing, removing an oxide layer and organic matters through plasma cleaning equipment; and S2, composite forming: carrying out stamping and stretching forming on the titanium-aluminum alloy plate by using a die to form an antenna oscillator, and integrating a fiber bragg grating sensor in the stamping process to monitor the stress distribution of the material in real time. According to the production method of the antenna oscillator, the antenna oscillator and the communication equipment, the annealing and cooling processes are accurately controlled, and the stress distribution is monitored in real time by using the FBG sensor, so that the production period of the antenna oscillator is remarkably shortened, the waiting time in the production process is reduced, and the production efficiency is improved. The problems of deformation, cracking and the like caused by stress concentration in the machining process of the antenna oscillator are greatly reduced, the rejection rate is reduced, and waste of raw materials and energy is reduced.

The invention discloses a self-lubricating aluminum coating and a preparation method thereof.The preparation method comprises the steps that molybdenum disulfide is pretreated through a silane coupling agent, tetraethoxysilane mixed liquor is added, the pH is adjusted to be 9-10, a water bath reaction is conducted, and molybdenum disulfide-silicon dioxide microcapsules are obtained after high-temperature strengthening treatment; respectively adding a zinc nitrate solution and a hexamethylenetetramine solution, adjusting the pH value to 10-11, carrying out a high-temperature and high-pressure hydrothermal reaction to obtain zinc oxide nanorods, and carrying out ball milling treatment on the zinc oxide nanorods, microcapsules, stearic acid and zirconium oxide balls under the protection of argon to obtain doped microcapsules; after raw materials are pretreated, the raw materials and a dispersing agent solution are added into a mixer respectively, spraying powder, a pretreated base body and the spraying powder are obtained after mixing treatment, spraying treatment is conducted on the surface of the base body through a plasma spraying method, and the self-lubricating aluminum coating is obtained after vacuum annealing treatment. Therefore, the obtained self-lubricating aluminum coating is low in friction coefficient, high in performance and excellent in self-lubricating property.

The utility model relates to vertical annealing equipment for a metal ultra-thin strip and an operation method, and belongs to the related technical field of metal ultra-thin strip hot working, the vertical annealing equipment comprises a furnace body device, a tension measuring device, a direction roller, an unwinding device, a winding device, a straightening device and a deviation rectifying device, the furnace body device comprises a muffle tank and a furnace body shell, a plurality of groups of elastic brackets fixedly connected with the furnace body shell are arranged on the outer side of the muffle tank in the length direction of the muffle tank, and the top of the muffle tank is fixedly connected with the top of the inner side of the furnace body shell through the top elastic bracket, so that the service life of the muffle furnace is prolonged; one side of the furnace body shell is respectively connected with a molecular pump and a gas inlet through steel pipes, the other side of the furnace body shell is provided with a gas outlet, and pipelines for connecting the molecular pump, the gas inlet and the gas outlet are respectively provided with a gas valve, so that the conversion between vacuum annealing and atmosphere annealing in the muffle furnace is realized; and the straightening device comprises a plurality of straightening rollers, so that high-precision straightening can be carried out on the annealed metal ultra-thin strip, and the strip shape quality of the strip is effectively improved.

The invention relates to the technical field of titanium alloy pipe manufacturing, and particularly discloses a preparation method of a titanium alloy thin-walled pipe with superplasticity, comprising the following steps: S110, annealing a titanium alloy bar below a phase transformation point in a vacuum annealing furnace; s120, the annealed bar material is subjected to reciprocating extrusion treatment; s130, the bar subjected to reciprocating extrusion treatment is subjected to forward extrusion to form a pipe blank; s140, the pipe blank is subjected to superplastic bulging treatment; s150, after superplastic bulging is finished, heat preservation is stopped, and inert shielding gas continues to be blown in for cooling to the room temperature; and S160, stress relief annealing is conducted on the thin-walled pipe obtained after superplastic bulging, and the titanium alloy finished pipe with superplasticity is obtained. According to the method, the plasticity of the titanium alloy pipe is remarkably improved through reciprocating extrusion and superplastic bulging, the deformability is improved, meanwhile, the grain size is regulated and controlled, and preparation of the high-performance and high-size-precision thin-wall pipe is achieved.

The invention discloses a method and a system for improving the bonding capacity of a titanium-based material in superplastic forming / diffusion bonding, and belongs to the field of titanium alloy material heat treatment and hot working. In order to solve the problem that in the prior art, the connection quality is reduced due to hydrogen dissipation in the high-temperature SPF / DB process of titanium hydride alloy, hydrogen is mixed into an inert gas pressure source, the environmental hydrogen partial pressure is increased to inhibit hydrogen element loss, and therefore the diffusion connection capacity is improved. The method comprises the specific steps that a titanium alloy plate is subjected to hydrogen treatment, cleaned and sprayed with a separant, then the titanium alloy plate is placed in a mold to be vacuumized, argon-hydrogen mixed gas is introduced to serve as a pressure source, and forming and connecting are completed through rapid heating and pressure maintaining; and after the process is finished, carrying out vacuum annealing in a dehydrogenation temperature range to remove hydrogen elements, and introducing argon to accelerate cooling. The hydrogen element can be effectively reserved to improve the joint quality, meanwhile, the dehydrogenation step is simplified, and the method is suitable for the field of titanium-based material hot working, especially the technical field of titanium hydride alloy superplastic forming / diffusion bonding.

The invention discloses a high-entropy alloy coating and a preparation method thereof, and relates to the technical field of preparation of high-entropy alloy coatings. The high-entropy alloy and the coating of the high-entropy alloy do not contain silicon elements, and the preparation method comprises the steps that according to the composition proportion of the high-entropy alloy, a magnetron sputtering technology is adopted, metal elementary substance targets of all components serve as sputtering target materials for sputtering, elementary substance films are sequentially deposited on a base body, and a multi-layer film precursor is formed; and then the multi-layer film precursor is subjected to vacuum annealing, so that the single-layer uniform high-entropy alloy coating is obtained. According to the method, accurate preparation of the multi-layer film precursor can be achieved by accurately controlling the sputtering rate or sputtering power of all elements, then the elements in the multi-layer film precursor are fully mixed through vacuum annealing treatment, and the uniform high-entropy alloy coating is formed. The high-entropy alloy coating prepared by the process, such as an AlCoCrFeNi high-entropy alloy coating, has excellent structural uniformity, and is suitable for the high and new technical fields of aerospace, energy engineering and the like.

The invention relates to the technical field of thin-wall metal part plastic forming, in particular to a thin-wall metal bulging forming method based on liquid phase change expansion, which comprises three continuous steps of pretreatment, freezing bulging and post-treatment, and specifically comprises the following steps: pretreatment: selecting a thin-wall metal pipe, and carrying out surface friction optimization treatment on the inner wall of the thin-wall metal pipe; an elastic buffer layer is arranged between the inner wall of the thin-wall metal pipe and the phase change medium; a phase change medium is injected into the thin-wall metal pipe, the filling rate of the phase change medium is 100%, freezing bulging is conducted, specifically, the pretreated thin-wall metal pipe serves as a forming part, and the thin-wall metal pipe is loaded into a precision forming tool and sealed; and post-treatment is conducted, specifically, stress relief treatment is conducted on the bulged thin-wall metal pipe, and the stress relief treatment is a 300-DEG C vacuum annealing process. According to the method, the defects of an existing bulging technology are remarkably overcome, and breakthrough is achieved in the aspects of technical performance, cost efficiency, environmental protection, safety and application expansion.

The invention discloses an amorphous nanocrystalline magnetic material production method, which relates to the technical field of amorphous nanocrystalline, and comprises the following operation steps: S1, material preparation; s2, alloy smelting, wherein the prepared raw materials are added into a vacuum induction smelting furnace according to a specific proportion; s3, single-roller rapid quenching strip manufacturing is conducted, specifically, smelted alloy liquid flows out through a nozzle at the bottom of the vacuum induction smelting furnace and is sprayed to the surface of a copper roller rotating at a high speed, and the alloy liquid is solidified into a thin strip; s4, nano-crystallization treatment: putting the prepared amorphous ribbon into a vacuum annealing furnace for annealing treatment; s5, magnetic field heat treatment, wherein after annealing treatment, the thin strip is placed in a high-intensity magnetic field environment to be subjected to heat treatment again; and S6, forming processing: winding the thin strip into an inductance coil by using a winding device. According to the production method of the amorphous and nanocrystalline magnetic material, the operation steps are simpler, the production efficiency of amorphous and nanocrystalline is higher, and the quality of the material is better.

According to the Ta-based refractory alloy reinforced by the silicide phase eutectic structure and the preparation method of the Ta-based refractory alloy reinforced by the silicide phase eutectic structure, nanoscale HfSi2 powder is introduced, and the alloy reinforced by the silicide phase eutectic structure is formed in the Ta-based alloy. According to the alloy, particles or powder of refractory metal elements such as Ta serves as a matrix raw material, nanoscale HfSi2 powder is introduced into the matrix raw material, an alloy ingot is prepared through a smelting process, and the alloy material is subjected to sufficient deformation recovery and homogenization through multiple times of pressure processing and high-temperature vacuum annealing treatment. A multi-level spherical eutectic structure exists in the alloy prepared through the method, the silicide phase serves as a strengthening phase, dislocation movement can be effectively inhibited, and the room-temperature mechanical property of the alloy is remarkably enhanced. The room temperature tensile elongation is about 30%, the yield strength is about 600 MPa, the tensile strength is about 700 MPa, and compared with a traditional Ta-based alloy, the tensile strength is obviously improved. The alloy of the system can be widely applied to structural parts by means of plastic deformation processing, heat treatment and the like.

The invention relates to a preparation method of a molybdenum-titanium alloy target material, which comprises the following steps: mixing molybdenum powder and titanium powder in a protective gas atmosphere to obtain mixed powder; the mixed powder is subjected to cold isostatic pressing, sheath degassing, hot isostatic pressing and vacuum annealing in sequence, and then the molybdenum-titanium alloy target material is obtained; the average particle size of the molybdenum powder is 3-5 [mu] m, and the average particle size of the titanium powder is 100-150 [mu] m; according to the preparation method, the molybdenum-titanium alloy target material which only contains a pure molybdenum phase and a molybdenum-titanium alloy phase and is high in density and low in content of gas impurity elements is prepared by selecting raw materials with specific particle sizes and matching specific procedures; wherein the proportion of the molybdenum-titanium alloy phase is preferably as high as 50% or above, the density is preferably as high as 99.9% or above, the hydrogen content is preferably as low as 3 ppm or below, the oxygen content is preferably as low as 576 ppm or below, and the problem that the product yield is low due to the fact that an existing molybdenum-titanium target is likely to be abnormal in the sputtering process is effectively solved.

The invention relates to the technical field of semiconductor material preparation, in particular to a gallium nitride single crystal wafer material preparation method which comprises the following steps: placing a silicon carbide substrate slice larger than a standard size in an accommodating groove of a graphite tray, and installing a cylindrical silicon nitride ceramic protective cover to assemble a substrate tray; putting the substrate tray into a magnetron sputtering growth chamber to prepare a zinc-aluminum-oxygen polycrystalline thin film and an aluminum nitride polycrystalline thin film in sequence; the substrate tray is placed in a high-temperature and high-vacuum annealing furnace chamber for high-temperature and high-vacuum annealing treatment, and the substrate tray is placed in a hydride vapor phase epitaxy reaction chamber for preparing the gallium nitride single crystal thick film material; cutting, grinding and polishing the peeled gallium nitride single crystal thick film wafer with the size larger than the standard size to obtain a gallium nitride single crystal wafer material with the standard size; and the stripped silicon carbide substrate slice and the used cylindrical silicon nitride ceramic protective cover can be repeatedly used after being cleaned. According to the method, low-stress, low-dislocation-density, low-cost and high-yield preparation of the standard-size gallium nitride single crystal wafer material can be realized.

The present invention provides a production method for small-diameter thick-wall titanium alloy seamless tubes, comprising: Step 1: obtaining a titanium alloy ingot through three times of VAR melting; Step 2: blooming, drawing out, and radial forging the titanium alloy ingot into a round bar, and machining the round bar into a hollow tube blank through deep hole drilling, internal honing, and external turning; Step 3: performing three passes of cold rolling on the hollow tube blank to produce a finished titanium alloy seamless tube; sampling the titanium alloy tube after each pass of cold rolling, observing its crack defects, removing the crack defects, and performing intermediate vacuum annealing after removing the crack defects; Step 4: performing vacuum annealing, straightening, pickling, ultrasonic testing, and packaging on the titanium alloy finished tube in Step 3 to produce a small-diameter thick-wall titanium alloy seamless tube. The present invention comprehensively formulates measures from aspects such as tube blank specification design, tube blank processing technology, titanium alloy tube cold rolling process design, vacuum annealing process design, and internal and external surface defect treatment technology of the tube blank to solve the problem of internal surface cracks in cold rolling of small-diameter thick-wall titanium alloy seamless tubes.

The application discloses a preparation method of a zirconium alloy rod for a nuclear fuel assembly end plug, and comprises the following steps: first, a zirconium alloy forging rod is subjected to machining and lubrication, heated and kept warm, and then extruded, and after extrusion, the extruded rod blank is obtained by sequentially performing straightening and polishing treatment; second, the extruded rod blank is heated and kept warm again, and then subjected to multi-pass hot rolling, and after hot rolling, the hot-rolled rod blank is obtained by centerless peeling; third, the hot-rolled rod blank is subjected to multi-pass pilger two-roll cold rolling to obtain a cold-rolled rod blank; fourth, the cold-rolled rod blank is subjected to vacuum annealing treatment to obtain an annealed rod blank; and finally, the annealed rod blank is subjected to finishing treatment, which sequentially comprises straightening, centerless grinding and degreasing, so that the target product is obtained; and the key parameters such as temperature, holding time and deformation amount of each step are strictly controlled. The preparation method breaks through the key technology of long rod cold rolling, realizes large plastic deformation of the zirconium alloy rod, significantly reduces deformation passes and intermediate heat treatment, and thus breaks through the problems of non-uniform structure, low production efficiency and insufficient product precision and the like existing in the traditional process.

The application discloses a physical vapor deposition device, an electrochromic device and a preparation method thereof, and relates to the technical field of electrochromic devices. The preparation method comprises the following steps: sputtering and depositing an electrochromic layer of WO3 on the surface of a first ITO layer, and the oxygen content is any value in the range of 42.5% to 52.5%; sputtering and depositing a pre-set thickness of a tungsten oxide ion conduction layer on the electrochromic layer, and the oxygen content of the corresponding chamber is any value in the range of 35% to 45%; sputtering and depositing an ion storage layer containing lithium ions on the ion conduction layer; depositing a second ITO layer on the ion storage layer, and obtaining the electrochromic device after vacuum annealing treatment and cooling treatment; wherein the deposition temperature of the second ITO layer is any value in the range of 350 DEG C to 400 DEG C, and the annealing temperature of the vacuum annealing treatment is any value in the range of 450 DEG C to 500 DEG C. The electrochromic device prepared by the application has the characteristics of high transmittance and low sheet resistance.

The invention discloses a large-area scintillator and a preparation method thereof, and belongs to the technical field of large-area scintillator preparation. The method comprises the following steps: uniformly mixing Cs3Cu2I5 powder with a solvent capable of dissolving the Cs3Cu2I5 powder to form slurry, preparing a large-area scintillator film with controllable area and thickness through a blade coating method, enabling scintillator grains to undergo dissolution and recrystallization processes through a vacuum annealing process, and preparing the large-area scintillator film on the basis of Ostwald curing effect. The small crystal grains are adsorbed to the surface of the larger crystal grains to form larger crystal grains, and gaps among the crystal grains are filled; as the internal defects of the crystal grains are reduced, the light scattering is reduced, the light transmittance of the scintillator is improved, and finally, large-area high-resolution imaging is realized; according to the method, the light transmittance of the scintillator film is improved from 5% of a Cs3Cu2I5: 2Me scintillator film to 20% or above of a Cs3Cu2I5: DMSO scintillator film through regulation and control of a solvent, the high resolution of 16 lp mm <-1 >-18 lp mm <-1 > is kept, and an excellent imaging effect on a real object is achieved.

The invention discloses a high-entropy ceramic thermal barrier coating and a preparation method thereof, and relates to the technical field of thermal barrier coating materials. The method comprises the following steps: mixing ZrO2, HfO2, Ta2O5 and various rare earth oxides, and carrying out high-energy wet ball milling, drying, solid solution sintering and crushing to prepare submicron high-entropy ceramic powder; mixing the modified powder with aluminum sol obtained by hydrolyzing aluminum isopropoxide, rare earth nitrate and the like, dispersing, drying and carrying out heat treatment to obtain modified powder coated with aluminum oxide nanoparticles on the surface; carrying out spray drying granulation to obtain spherical agglomerated powder; and finally, a DD6 single-crystal high-temperature alloy matrix is subjected to sand blasting and pre-oxidation treatment, agglomerated powder is deposited on the surface of the matrix through a plasma spraying vapor deposition technology, a columnar crystal coating is formed, and a finished product is obtained through vacuum annealing. The coating prepared through the method is uniform in structure and high in bonding strength, thermal shock resistance and high-temperature phase stability are remarkably improved, and the coating is suitable for surface protection of aero-engine hot end components.

This invention discloses a heat treatment process for reducing the fracture sensitivity of 20Mn2A circular link chains, comprising the following steps: (1) Pretreatment: heating to 650±10℃ at a rate of 4.8-5.2℃ / min in a vacuum annealing furnace, holding for 1-3 hours, and then cooling to room temperature in the furnace; (2) Graded quenching; (3) Two-stage tempering: the first stage is low-temperature tempering: holding at 200-210℃ for 2-3 hours, followed by oil cooling; the second stage is medium-temperature tempering: holding at 380-400℃ for 1-2 hours, followed by oil cooling. This invention, through a scientific three-stage treatment, achieves an optimized match between the strength and toughness of 20Mn2A circular link chains, with the specific objectives being: tensile strength ≥1050N / mm², low-temperature impact energy at -40℃ ≥48J, and internal residual stress ≤85MPa, significantly reducing fracture sensitivity and extending service life.

The preparation method comprises the following steps of smelting, up-drawing continuous casting, continuous extrusion, drawing and vacuum annealing, an oxygen-free copper rod with the oxygen content smaller than or equal to 3 ppm is prepared through the smelting process and the up-drawing continuous casting process, and after the oxygen-free copper rod is subjected to the continuous extrusion process, the drawing process and the vacuum annealing process, the oxygen-free copper rod with the oxygen content smaller than or equal to 3 ppm is obtained. The foaming reject ratio of the red copper material can be obviously reduced, the bubble defect of the red copper material in the high-temperature welding or sintering process is reduced, and the method is suitable for the technical field of three-dimensional heat pipe preparation. The invention further discloses a machining die for the continuous extrusion procedure, parameters of the machining die are optimized, copper metal flows uniformly in the die, and the stress concentration and crack phenomena are avoided.

The invention discloses a thin infrared high-reflection mirror and a preparation method thereof, and belongs to the technical field of optical devices. The preparation method comprises the following steps: depositing a Ni-Ti alloy film on a heated Ti alloy substrate in a deposition atmosphere in which Ar gas and a small amount of NH3 gas are introduced by adopting a radio frequency magnetron co-sputtering process and taking a Ti target and a Ni target as sources; the Ni target sputtering power is increased in a stepped mode, so that the Ni content in the film layer is gradually increased from the interface to the surface, and a component gradient structure is formed; and carrying out vacuum annealing and polishing treatment after deposition. Through the etching effect of the NH3 active group and the component gradient structure design, the internal stress of the film layer is synergistically reduced, the density and the interface bonding force are improved, and the obtained reflector has the advantages of moderate film layer thickness, firm bonding, high surface quality and easy processing, and is suitable for light-weight and high-performance infrared optical systems in the fields of aerospace and the like.

The invention relates to the technical field of titanium and titanium alloy processing, in particular to a preparation method of a titanium-copper alloy plate or strip, which comprises the following steps: selecting a Ti-5Cu alloy casting blank with the thickness of 60-200mm, the width of 600-2000mm and the length of Lmm; analyzing and measuring the phase transition temperature T1 of the Ti-5Cu alloy casting blank; the method comprises the following steps: coating the surface of a Ti-5Cu alloy casting blank with pure titanium or coating the surface of the Ti-5Cu alloy casting blank with an anti-oxidation coating to obtain an anti-oxidation blank, heating the anti-oxidation blank to T2 = T1 + (25-160) DEG C, and keeping the temperature for 10-60 minutes; carrying out hot rolling on the antioxidant blank subjected to heating and heat preservation at the temperature not lower than 700 DEG C; and the hot-rolled blank is subjected to cold rolling, and the titanium-copper alloy plate or strip with the thickness being 0.2-3 mm is obtained. The hot rolling process is carried out in the interval above the phase transition temperature of the Ti-5Cu alloy, it is avoided that when beta-phase region machining is finished, coarse grains are reserved in metal, and in the cold rolling process, rolling defects caused by work hardening and strip cold rolling are eliminated through vacuum annealing or protective atmosphere annealing, the alloy machining plasticity is recovered, and the strip cold rolling machining performance is improved.

The invention discloses a high-performance aluminum reflecting film, which comprises a substrate, a first metal layer, a second metal layer, a first protective layer and a second protective layer, and is characterized in that the first metal layer is deposited on the substrate, the second metal layer is deposited on the first metal layer, and the second metal layer is subjected to in-situ oxidation to form the first protective layer; and preparing a second protective layer on the first protective layer, obtaining a deposited film, and carrying out vacuum annealing treatment to form a stable and reliable high-performance aluminum reflecting film, the method for depositing the aluminum oxide film protective layer in situ is provided, so that the overall performance of the high-performance aluminum reflecting film is greatly improved, the reflecting capacity is enhanced, and the service life of the aluminum reflecting film is prolonged. According to the high-performance aluminum reflecting film, the reflectivity of the high-performance aluminum reflecting film in the range from visible light to infrared spectrum is remarkably improved, and the adhesive force of the aluminum film and the substrate is also improved, so that the stability and durability of the film layer are ensured, the adhesive force of the second protective layer on the first protective layer is improved, and the application range of the high-performance aluminum reflecting film is expanded.

The invention relates to the technical field of zirconium alloy material machining, in particular to a machining method for a small-specification zirconium alloy bar. The method comprises the following steps: 1, carrying out vacuum melting on sponge zirconium and alloy elements which form the zirconium alloy for multiple times according to a component requirement ratio to obtain a zirconium alloy cast ingot; and 2, the cast ingot is subjected to forging and slitting treatment after being heated and subjected to heat preservation, and the zirconium alloy forged rod is obtained. And thirdly, the zirconium alloy forged rod is heated, subjected to heat preservation and then subjected to quenching treatment, and a quenched rod blank is obtained. And fourthly, the quenched bar blank is subjected to hot rolling and slitting treatment, and a hot-rolled bar blank is obtained. And fifthly, the hot-rolled bar blank is subjected to cold finish rolling and slitting treatment, and a cold-rolled bar is obtained. And sixthly, the cold-rolled bar is subjected to vacuum annealing treatment after being deoiled / degreased, and an annealed bar is obtained. And seventhly, the finished product annealing bar is sequentially subjected to straightening and centerless grinding treatment, and the finished product bar is obtained. According to the method, the small-specification zirconium alloy bar with better structure and performance is obtained by adopting a short technological process combining large-deformation hot rolling and cold rolling.

This invention belongs to the field of metal material processing technology, and relates to an annealing process for zirconium alloy thin-walled short tubes and its heat treatment loading bin. Based on the specifications of the uniform temperature zone of the vacuum annealing furnace chamber, the specifications of the material rack, the heating method, the loading capacity, the outer diameter and length of the tube, the gas absorption characteristics of the material, and the stability of the tooling structure, this invention specifically designs a loading bin for the heat treatment of thin-walled short tubes for vacuum annealing furnaces. Combined with an improved furnace loading method, adjusted annealing heating curves and annealing process parameters, the heat treatment loading bin is placed on the material rack or loading platform of the vacuum annealing furnace. The tooling is assembled and fixed, the thin-walled short tubes are neatly placed in the heat treatment loading bin, anti-oxidation measures are taken, and process parameters such as the heating curve, heating temperature, and holding time are set according to the furnace loading capacity and tube performance requirements. This ensures that the thin-walled short tubes do not undergo dimensional deformation or surface scratches after heat treatment, improves straightness, prevents surface oxidation, and improves heat treatment efficiency.

The invention discloses physical vapor deposition equipment, an electrochromic device and a preparation method of the electrochromic device, and relates to the technical field of electrochromic devices. The preparation method comprises the following steps: sputtering and depositing the WO3 electrochromic layer on the surface of the first ITO layer, wherein the oxygen content is any one of 42.5-52.5%; sputtering and depositing a tungsten oxide ion conducting layer with a preset thickness on the electrochromic layer, wherein the oxygen content of the corresponding chamber is any one of 35%-45%; sputtering and depositing an ion storage layer containing lithium ions on the ion conduction layer; a second ITO layer is deposited on the ion storage layer, and the electrochromic device is prepared after vacuum annealing treatment and cooling treatment; wherein the deposition temperature of the second ITO layer is any one value from 350 DEG C to 400 DEG C, and the annealing temperature of the vacuum annealing treatment is any one value from 450 DEG C to 500 DEG C. The electrochromic device prepared by the invention has the characteristics of high transmittance and low sheet resistance.

The invention provides a zirconium alloy nickel plating method based on a multi-element gradient transition layer and a nickel-plated zirconium alloy workpiece, and relates to the technical field of surface treatment.The method comprises the steps that the zirconium alloy workpiece is pretreated; the pretreated zirconium alloy workpiece is immersed in fused salt electroplating liquid, stepped electro-deposition and vacuum annealing treatment are conducted on the pretreated zirconium alloy workpiece, a multi-element gradient transition layer with components changing from zirconium-rich nickel alloy to nickel-rich zirconium alloy in a gradient mode is formed on the surface of the zirconium alloy workpiece, and an intermediate zirconium alloy workpiece is generated; and the intermediate zirconium alloy workpiece is subjected to activating treatment, the intermediate zirconium alloy workpiece subjected to activating treatment is placed in an electroplating nickel solution to be subjected to electroplating nickel treatment, and the nickel plating layer is obtained. The bonding performance of the surface nickel plating layer is improved.