190 results about "Vacuum annealing" patented technology

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 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 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 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 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 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.

The invention belongs to the field of thin film capacitors and related dielectric materials, and particularly discloses an all-organic composite material as well as a preparation method and application thereof, and the all-organic composite material comprises the following components in percentage by mass: 98.00 wt%-99.75 wt% of fluorene polyester and 0.25 wt%-2.00 wt% of hexacyanohexaazabenzophenanthrene. The preparation method comprises the following steps: respectively adding fluorene polyester and hexacyanohexaazabenzophenanthrene into an organic solvent, fully stirring and dissolving, and ultrasonically mixing to obtain a uniformly mixed solution; uniformly coating a substrate with the mixed solution, heating, carrying out vacuum annealing, and stripping to obtain the fluorene polyester / hexacyanohexaazabenzophenanthrene composite film. According to the invention, the charge-discharge efficiency and discharge energy density of the polymer under high temperature and high electric field are improved, the technical problems of high leakage loss and low charge-discharge efficiency of the existing polymer film are solved, and large-scale industrial production is easy to realize.

The invention discloses a preparation method and application of doped graphite, and belongs to the technical field of doped graphite. The method comprises the following steps: performing vacuum annealing on a single crystal metal substrate adsorbed with a doped element compound to obtain a doped element embedded single crystal metal substrate; the single crystal metal substrate embedded with the doping elements is attached to a graphite base material, heat preservation is conducted for 1-3 h at the temperature of 1000-1500 DEG C in a non-oxidizing atmosphere, then heat preservation is conducted for 4-12 h at the temperature of 700-900 DEG C, and the doped graphite is obtained after cooling. According to the invention, the doping elements are embedded into the single crystal metal substrate, and the graphite is doped through variable temperature growth, so that the super-lubricity is maintained while the doping uniformity and controllability are ensured, and the method is more suitable for being applied to electronic devices needing to maintain the super-lubricity.

The utility model belongs to the technical field of heat treatment, and particularly relates to a vacuum tempering furnace for heat treatment, which comprises a furnace body, the front surface of the furnace body is hinged with a sealing furnace door through a hinge, the inner wall of the furnace body is fixedly connected with an electric heating plate, and the back surface of the furnace body is provided with a round hole. And the inner wall of the round hole is fixedly connected with a first bearing. According to the vacuum tempering furnace for heat treatment, through cooperation of a first bearing, an adjusting support, a first strip-shaped ring, a connecting block, an electric push rod, a second strip-shaped ring, a shelving plate, a U-shaped plate and a guide column, the electric push rod can control the shelving plate to move upwards or downwards, and then the position of the shelving plate in the furnace body can be automatically adjusted; and through cooperation of a connecting ring, a second bearing, a fourth cylinder, a first supporting column, a second supporting column and a scraping strip, a user can clean the front side and the rear side of the hollow tempered glass at the same time by rotating the first supporting column.

The invention discloses a (Ni, Pt) Al / Ni composite coating of a single-crystal high-temperature alloy, the composite coating takes the single-crystal high-temperature alloy as a matrix, the composite coating is a single-layer coating formed by single-phase beta-(Ni, Pt) Al, and no mutual diffusion zone exists between the composite coating and the matrix. The preparation method comprises the following steps: firstly, pre-electroplating Ni on the surface of the substrate as a transition layer, then electroplating a Pt layer, carrying out hydrogen removal and diffusion vacuum annealing treatment and high-temperature low-activity gas phase aluminizing treatment, and finally, forming the composite coating on the surface of the substrate. The composite coating and the pre-plated Ni layer are introduced as a diffusion barrier layer, so that direct contact between the Pt layer and the matrix is effectively blocked, mutual diffusion between the Pt layer and the matrix is inhibited, damage to a coherent phase structure in the matrix and formation of a TCP precipitated phase caused by mutual diffusion of Ni and Al are delayed, formation of a secondary reaction zone is delayed, and the material stability is ensured. The composite coating provided by the invention is a high-temperature protective coating with slow oxidation weight gain at high temperature.

The invention relates to the technical field of high-purity metal sputtering target materials, in particular to an ultra-fine grain high-purity tantalum target blank and a preparation method thereof. The preparation method of the ultra-fine grain high-purity tantalum target blank comprises the following steps that an extrusion die with a gradient die hole length-diameter ratio is adopted for conducting a multi-round extrusion process on a high-purity tantalum cast ingot, the high-purity tantalum cast ingot obtained after each round of extrusion is subjected to vacuum annealing, and the high-purity tantalum target blank is obtained; carrying out a cold rolling process on the high-purity tantalum target blank; and carrying out vacuum graded annealing on the tantalum blank subjected to the cold rolling process. According to the preparation method of the ultra-fine grain high-purity tantalum target blank, through precise cooperation of a series of innovative processes, the ultra-fine grain high-purity tantalum target blank which is finer and even in distribution compared with a conventional process is obtained.

The application provides a method for improving the yield of TA18 titanium alloy seamless pipe, and specifically comprises the following steps: step one, pressing raw materials into multiple electrode blocks to obtain consumable electrodes after welding, wherein the raw materials contain yttrium alloy elements with a mass percentage of 0.001% to 0.03%; step two, melting to obtain titanium alloy ingots; step three, directly hot continuous rolling the titanium alloy ingots without skinning at 1050-1150 DEG C for 4.5-7.5 hours to obtain titanium alloy rods; step four, slanting piercing to obtain a blank pipe; step five, pickling the blank pipe and then cold rolling it in one pass; step six, boring the pipe blank from inside to outside, annealing and then hot continuous rolling; step seven, polishing the outer surface and grinding the inner surface after pickling; step eight, cold rolling no more than 4 times; step nine, straightening, pickling and vacuum annealing; and step ten, magnetic polishing. The application can improve the yield of TA18 titanium alloy seamless pipe to more than 40%.

The post-treatment method includes the following steps: immersing the raw state carbon nanotube film in chlorosulfonic acid and allowing it to stand, then leaving it in the air to allow the chlorosulfonic acid molecules inside the carbon nanotube film to react with water molecules in the air, then generating sulfuric acid molecules inside the carbon nanotube film, promoting the introduction of water molecules into the carbon nanotube film, then placing it back in chlorosulfonic acid to chemically react with water molecules to generate hydrogen chloride gas, then expanding the carbon nanotube film, then stretching, immersing it again in the chlorosulfonic acid solution, and finally performing high-temperature vacuum annealing heat treatment. The tensile strength of the carbon nanotube film prepared according to this application is in the order of GPa, and its conductivity is 10 6 It is at the S / m level, has higher surface flatness, and facilitates compounding with other materials.

The application discloses a preparation method of a nuclear-grade zirconium-niobium intermediate alloy wire, which is composed of the following components in mass percentage: 15-75% of Nb, and the balance of Zr and inevitable impurities; the method comprises the following steps: step one, vacuum self-consumption arc smelting and forging are performed on sponge zirconium and niobium blocks to obtain a rod blank; step two, the rod blank is rolled at 850-950 DEG C by using a rolling mill, is peeled after annealing in an argon atmosphere, and is cold-rolled to obtain a wire blank; and step three, the wire blank is peeled, is subjected to intermediate vacuum annealing and polishing in multiple cold-drawing passes to obtain the zirconium-niobium intermediate alloy wire. The method can realize the synchronization and uniformity of alloy flow on the surface and in the core of the wire by controlling the Nb content of the zirconium-niobium intermediate alloy and the rolling temperature of the rolling mill, adopting the process of cold rolling and multiple cold-drawing passes, and obtaining the zirconium-niobium intermediate alloy wire with good quality, and is suitable for the technical field of metal material processing.

This invention belongs to the field of antibacterial coating technology, specifically relating to a method for preparing a composite antibacterial and detoxifying coating on a ceramic surface, comprising the following steps: S1. Applying gold solution to a fired ceramic surface and then annealing to prepare a transition layer; S2. Preparing a silver-plated antibacterial layer on the ceramic surface with the transition layer formed by vacuum evaporation; S3. Preparing a titanium-plated protective layer on the surface with the silver-plated antibacterial layer formed by vacuum evaporation; S4. Vacuum annealing the ceramic with the titanium-plated protective layer formed to obtain the finished product. The composite antibacterial and detoxifying coating on a ceramic surface prepared by this invention has excellent antibacterial properties, with an antibacterial rate of up to 99.99%, meeting the antibacterial performance requirements of ceramics. Furthermore, the composite antibacterial and detoxifying coating on a ceramic surface prepared by this invention can effectively reduce cyanide in solutions such as liquor, meeting the detoxification performance requirements of ceramics. In addition, the composite antibacterial and detoxifying coating on a ceramic surface prepared by this invention has a precious metal ceramic decorative effect, making the ceramic surface smoother and more glossy, thus improving the quality of the ceramic.

The application discloses a low-loss control method for superplastic forming performance of a titanium alloy thin-wall plate and a formed component, and relates to the technical field of superplastic forming control of the titanium alloy thin-wall plate. The application solves the performance loss problem of the thin-wall titanium alloy in the superplastic forming. The method comprises the following steps: placing the titanium alloy thin-wall plate into a vacuum hydrogenation furnace, sequentially performing vacuumizing, temperature rising, temperature keeping and hydrogen heat treatment, and finally completing hydrogenation; discharging hydrogen and introducing argon, so that the titanium alloy thin-wall plate after hydrogenation is cooled to room temperature; performing a superplastic forming process on the titanium alloy thin-wall plate after cooling to obtain a formed component; cooling the formed component to room temperature and placing the formed component into a vacuum furnace, vacuumizing and then heating to a temperature required by vacuum annealing to perform dehydrogenation; cooling the component after dehydrogenation to room temperature to obtain a titanium alloy component with low performance loss. The application is suitable for the technical field of superplastic forming of the titanium alloy thin-wall plate.

The invention relates to the technical field of semiconductor material preparation, and discloses a quartz crucible for semiconductor-grade silicon single crystal growth and a preparation method thereof. The quartz crucible comprises a super-inert passivation coating, an inner layer and an outer layer which are sequentially arranged from inside to outside, the super-inert passivation coating is formed on the innermost surface of the inner layer; the super-inert passivation coating is in an amorphous glass state; and the outer layer is formed by melting natural quartz sand. According to the preparation method, a matrix is prepared by adopting a multi-section atmosphere regulation and control electric arc founding and vacuum annealing process, and the compact coating is formed on the inner wall of the matrix through low-temperature plasma sintering. Through the combination of the structure and the preparation method, the prepared quartz crucible for semiconductor-grade silicon single crystal growth has excellent high-temperature crystallization resistance, the oxygen concentration in a silicon melt can be effectively reduced and stabilized, the structural durability is high, and the service life is remarkably prolonged.

The present application belongs to the technical field of electrolytic copper foil manufacturing, and particularly relates to a HVLP copper foil with low surface roughness and a preparation method thereof. The preparation method comprises the following steps: electrolytic foil growth, vacuum annealing treatment, electrochemical grain boundary pinning treatment, surface treatment and drying and slitting. The vacuum annealing treatment is performed after the electrolytic foil growth and before the surface treatment, so as to eliminate the residual stress in the copper foil; the electrochemical grain boundary pinning treatment adopts a silicon tungstate or phosphomolybdate electrolyte, and introduces tungsten or molybdenum elements at the grain boundary of the copper foil to form a pinning layer; in the surface treatment, the roughening treatment adopts pulse current and adds grain nano-refining additives, the solidification treatment is performed in a solidification liquid containing a rare earth salt, and the silane coupling agent treatment adopts a complex treatment liquid of KH-560 and a long-chain alkyl silane coupling agent. The obtained HVLP copper foil has a roughness Rz of the rough surface of less than or equal to 0.8 microns, high initial peel strength, a peel strength retention rate of more than 80% after hygrothermal aging, and good long-term service stability.

The utility model belongs to the field of vacuum tempering furnaces, and particularly relates to a vacuum tempering furnace for heat treatment, which comprises a heat preservation shell, a supporting seat is fixedly mounted at the lower end of the heat preservation shell, a furnace shell is fixedly mounted in the heat preservation shell, a vacuum pipe is fixedly mounted at the upper end of the furnace shell, and a furnace cover is hinged to the outer side of the heat preservation shell. A locking mechanism is arranged on the heat preservation shell, a suction pipe is fixedly connected to the upper end of the heat preservation shell, and a sealing ring is fixedly connected to the lower portion of the inner wall of the suction pipe. The heat preservation shell, the suction pipe, the sealing ball and other structures are additionally arranged on the outer side of the furnace shell, the interior of the heat preservation shell can be vacuumized through the suction pipe in the using process, and then the temperature in the heat preservation shell can be isolated through vacuum; and the density of the gas in the heat preservation shell can be adjusted only through the suction pipe, so that the heat preservation performance of the heat preservation shell is convenient to control.

The application discloses a stainless steel high-temperature molten chloride corrosion resistance protection method, which comprises the following steps: depositing a molybdenum coating on the surface of the stainless steel; and performing vacuum annealing treatment on the stainless steel with the molybdenum coating deposited on the surface, so as to realize high-temperature molten chloride corrosion resistance protection of the stainless steel. The application adopts a magnetron sputtering technology to deposit a pure molybdenum coating on 304 stainless steel, the thickness of the coating is 1.5 microns, and vacuum annealing is performed at 800 DEG C for 3 hours. After the molybdenum coating 304 stainless steel subjected to vacuum annealing treatment is corroded in high-temperature molten chloride at 700 DEG C for 800 hours, the sample still maintains good stability. Compared with the stainless steel without the molybdenum coating, the stainless steel with the molybdenum coating but without annealing treatment, or the stainless steel with the molybdenum coating and subjected to different annealing time at the same temperature, the molybdenum coating subjected to vacuum annealing at 800 DEG C for 3 hours and then corroded in high-temperature molten chloride at 700 DEG C for 800 hours still maintains stability, can effectively protect the 304 stainless steel, and promotes the application of the 304 stainless steel as a structural material in the next generation of solar thermal power stations.