125 results about "Hot isostatic pressing" patented technology

This invention belongs to the field of cardiac stent technology, specifically relating to a cobalt-chromium MP35N implantable tube for cardiac stents and its preparation method. The preparation method includes the following steps: raw material preparation and pretreatment, cold isostatic pressing, sintering and densification, multi-directional alternating deformation and tissue regulation, and finishing and shaping treatment to obtain the cobalt-chromium MP35N implantable tube for cardiac stents. This invention constructs a low-impurity, fully dense homogeneous tube blank substrate through cold isostatic pressing, vacuum sintering, hot isostatic pressing, and multi-directional alternating deformation, reducing the risk of subsequent cracking. The multi-directional alternating deformation, through alternating stress of axial tension and radial rotary forging, breaks the directional grain arrangement, and combined with gradient recrystallization heat treatment, ultimately obtains an ultrafine-grained, isotropic structure with both high strength and good toughness.

The application discloses a kind of preparation method and device of particle reinforced titanium matrix composite powder, belong to powder metallurgy technical field, the method is according to the process flow of "raw material preparation→inert gas replacement→raw material mixing→discharge and storage" preparation powder, the raw material mixing utilizes high-speed impeller mixing technology, makes nano reinforced particle uniform dispersion and adhere to titanium alloy spherical powder surface, forms the core-shell structure with titanium alloy spherical powder as core, nano reinforced particle as surface layer, avoids reinforcing phase aggregation.The device includes airtight mixing tank, high-speed impeller assembly for mixing raw materials and inert gas system communicated with the airtight mixing tank, the outer wall of tank is provided with double-layer water cooling structure for controlling the temperature in tank during mixing process.The powder prepared by high-speed impeller shear mixing method perfectly adapts to the stringent requirements of 3D printing, powder hot isostatic pressing and other high-end forming processes on powder fluidity.

This invention provides a method for forming and preparing high-alloyed high-temperature alloy powder that can be used in multiple processes. To address the problems of traditional high-alloyed high-temperature alloys having limited applications, high R&D costs, and incompatibility between different processes and materials when applied in multiple fields, this method carefully balances alloying elements and controls matching forming process parameters. This improves the adaptability of the alloy to various forming processes while maintaining good mechanical properties. The alloy powder can be simultaneously used for wide-gap brazing support materials, hot isostatic pressing, and additive manufacturing. Characterization is performed using a combination of various testing and characterization methods, and the results are comparable across different processes. The results show that the alloy prepared by the forming method provided in this application has uniform and fine dendrites and grains, low porosity, good thermal stability, and possesses high mechanical properties and good forming process performance.

This invention provides a tungsten-nickel-tantalum alloy target and its preparation method. The preparation method involves sequentially subjecting a mixture of tungsten powder, nickel powder, and tantalum powder to cold isostatic pressing, degassing, and hot isostatic pressing. This process yields a tungsten-nickel-tantalum alloy target with a density of 100%, uniform microstructure, and excellent performance. Moreover, the preparation method is simple and suitable for mass production.

The invention discloses a surface nano oxide dispersion strengthening method for high-strength and high-toughness aluminum alloy powder and a powder material thereof, and relates to the technical field of powder metallurgy materials. Aluminum-zinc-magnesium-copper-zirconium pre-alloyed atomized powder is used as a matrix, and is dispersed by virtue of polyvinylpyrrolidone and anhydrous alcohol; the preparation method comprises the following steps: sequentially introducing magnesium aluminate spinel nanoparticles, optional magnesium oxide nanoparticles and passivated magnesium nanoparticles for dry coating, embedding a nano dot matrix into a surface layer through ceramic ball micro shot blasting, removing organic matters in a vacuum subsection manner, thermally activating at 405-435 DEG C, cooling, and adding zinc micro powder for low-energy coating. The method is suitable for canning degassing, hot isostatic pressing and hot extrusion workpieces. And large-scale production can be realized. The oxide in the obtained powder is converted into intragranular non-communicated dispersion particles from a prior powder boundary communicated interlayer, the boundary connectivity is reduced, the densification combination is improved, the fracture toughness, impact and high-cycle fatigue are remarkably improved, meanwhile, the powder fluidity is kept, and the consistency is improved.

The invention is directed to a method for improving the wear resistance of a vanadium alloyed powder metallurgy produced cold work tool steel comprising 1-20 %V, 1 – 5 %Mo and ≤ 1 %W by HIPing the steel and subjecting the HIPed steel to a heat treatment at a temperature of at least 5 °C higher than the solidus temperature of the tool steel for a time of at least 30 minutes in order to increase the size of the VC-particles, wherein the cold work tool steel after hardening and tempering does not contain noticeable amounts of other carbides than VC.

The application provides a composite silicon carbide etching ring and a preparation method thereof. The composite silicon carbide etching ring comprises: an etching ring base body which is obtained by processing a SiC blank to a target size, and the SiC blank is obtained by hot isostatic pressing of SiC powder synthesized by a solid phase synthesis method; and a SiC coating which is deposited on the etching ring base body by CVD. The preparation method comprises the following steps: synthesizing SiC powder by a solid phase method; hot isostatic pressing and sintering the SiC powder to obtain a SiC blank; machining and cleaning the SiC blank to obtain an etching ring base body; and depositing a SiC coating on the surface of the etching ring base body by CVD. The hot isostatic pressed and sintered silicon carbide is sintered in a uniform pressure and temperature field, has a more uniform structure, smaller anisotropy, high density, high mechanical strength, and stress far smaller than that of solid SiC block material prepared by a CVD method due to the uniformity of the structure; and the high-purity SiC powder + hot isostatic pressing + low-temperature CVD process as a whole guarantees the purity requirement (greater than 5N) of etching.

This invention provides a tungsten sputtering target and its preparation method, relating to the field of magnetron sputtering target preparation technology. The preparation method includes first loading tungsten powder into a casing; then performing vacuum hot pressing sintering on the casing filled with tungsten powder. During vacuum hot pressing sintering, the casing isolates the tungsten powder from the carbon atmosphere, preventing the introduction of impurity elements, and simultaneously achieving degassing, sealing, and sintering of the tungsten powder in the casing; followed by hot isostatic pressing. The casing is made of a metal with a melting point higher than 2000℃ that does not chemically react with tungsten. Before vacuum hot pressing sintering, this invention uses a metal casing to fill the tungsten powder, which not only improves the initial density and uniformity of the tungsten powder and increases the contact area between powder particles, thus improving sintering activity; it also prevents carbon elements from intruding into the blank, reducing carbon inclusions, improving the purity of the target material, lowering the sintering temperature and pressure, improving production efficiency, reducing energy consumption, and extending the service life of the mold.

The application relates to the technical field of ball valve production and processing, and discloses a production and processing technology of a sealed wear-resistant ball valve, which comprises the following steps: base material pretreatment, wear-resistant bottom layer preparation, functional coating slurry preparation, functional coating coating, sealing surface strengthening treatment, intelligent pressure detection module integration, closed-loop control system assembly, hot isostatic pressing densification treatment, precision calibration and performance testing, surface passivation and packaging. In the application, the nano diamond particles and the chromium-based tungsten carbide composite powder in the functional coating slurry jointly construct a high-hardness wear-resistant framework, resist the abrasive wear and erosion of the sealing surface, the molybdenum disulfide serves as a solid lubricant and forms a transfer film on the friction interface during the working process, reduces the friction coefficient, realizes the self-lubricating effect, the epoxy-modified organic silicon resin serves as a bonding phase, firmly combines the functional components, and endows the coating with good toughness and bonding strength, so that the wear-resistant life and reliability of the ball valve sealing pair are synergistically improved under harsh working conditions.

The invention relates to a method for producing a bubble-free X-ray amorphous MAS glass body having a mass of > 3 kg, a surface area / volume ratio of < 1.5 cm ‑1 per 100 cm 3 having less than 5 bubbles with a size of 0.1 mm to 0.2 mm and no bubbles with a size > 0.2 mm, wherein the method has the following method steps: a) preparing a powder mixture having 10 to 40 mol% of MgO, 5 to 30 mol% of Al2O3 and 40 to 70 mol% of SiO2 or precursors of these raw materials and having auxiliary elements and foreign elements, wherein the auxiliary elements are elements of the I main group and / or the II main group and / or the IV main group and / or Fe, wherein the total content of auxiliary elements and foreign elements is set to at least 10 ppm - 300 ppm, in particular at least 30 ppm - 150 ppm, particularly preferably at least 50 ppm - 100 ppm; b) melting the powder mixture prepared in step a); c) cooling the melt produced in step b) and comminuting the cooled melt into particles having a diameter of < 10 mm; d) heating and melting the particles obtained in step c); and e) cooling the melt obtained in step d) in order to obtain a MAS glass body; and f) performing a hot isostatic pressing process on the MAS glass body in order to obtain a bubble-free MAS glass body.

This invention relates to the field of aluminum alloy composite materials technology, and in particular to a method for preparing high-temperature, high-strength SiC fiber-reinforced aluminum matrix composite materials. The method involves a combination of magnetron sputtering and hot isostatic pressing to prepare the SiC fiber-reinforced aluminum matrix composite material. From the inside out, the SiC fiber-reinforced aluminum matrix composite material consists of: a SiC fiber core layer, a carbon layer, a titanium layer, a 2024Al alloy matrix, and a 2024Al alloy cladding. Each layer is continuously distributed along the length of the SiC fibers, forming an integral structure with continuous axial reinforcement and radial gradient bonding. This invention can eliminate interfacial stress between the SiC fibers and the aluminum matrix, control the α-Al grain size and precipitated phases in the aluminum matrix, achieve a uniform arrangement of 50% volume fraction of SiC fibers, and the composite material achieves a room temperature tensile strength of over 1400 MPa, a 200°C tensile strength of over 1300 MPa, and a room temperature compressive strength of over 3200 MPa.

This application discloses a high-weld-resistance copper-chromium contact and its preparation method, belonging to the field of contact material technology. The preparation method includes: using high-purity electrolytic chromium powder and electrolytic copper powder as raw materials, mixing them via acoustic resonance, and then sequentially passing them through powder pressing and cold isostatic pressing to obtain a blank; subjecting the blank to gradient sintering and finishing to obtain a copper-chromium electrode rod; then atomizing the copper-chromium electrode rod to obtain copper-chromium alloy powder; sequentially passing the copper-chromium alloy powder through cladding, heat treatment, sealing welding, and hot isostatic pressing sintering, and then removing the cladding to obtain a preform; after processing the preform, remelting the surface with a green laser to obtain a high-weld-resistance copper-chromium contact. This method improves the purity of the copper-chromium contact and optimizes the morphology and distribution of chromium particles, resulting in a contact with high purity, fine and uniformly distributed chromium particles, excellent weld resistance and breaking performance, suitable for high-voltage arc-extinguishing chambers.

This invention discloses a method for preparing high-density bulk polycrystalline albite polymers under high temperature and high pressure conditions, comprising: completely sealing albite sample powder under a vacuum of 10... –3 The steel cladding was placed inside the graphite furnace cylinder of the high-pressure vessel of a hot isostatic pressing (HIP) apparatus, and a graphite sealing cap was placed on top. Argon gas was used as the pressure transmission medium. The temperature inside the sample chamber of the cylinder was raised to 1050 °C and the pressure was raised to 93.2 MPa using a multi-gradient cylinder heating and pressurization method, and the temperature and pressure were maintained for 7.9 hours. The temperature inside the sample chamber of the cylinder was lowered to 162 °C and the pressure was lowered to 50.7 MPa at a cooling rate of 16.44 °C / min and a depressurization rate of 0.79 MPa / min. Finally, the pressure was released and the sample was cooled to room temperature to obtain polycrystalline albite polymer. This method fills the technical gap in the preparation of bulk experimental samples of high-density polycrystalline albite polymer under high temperature and high pressure conditions.

This invention discloses a method for preparing high-density bulk polycrystalline serpentine under hot isostatic pressing, comprising: sealing serpentine sample powder under a vacuum of 10... –3 The steel cladding was placed inside the graphite furnace cylinder of the high-pressure vessel of a hot isostatic pressing (HIP) apparatus, and a graphite sealing cap was placed on top. Using argon as the pressure transmission medium, the temperature inside the sample chamber of the cylinder was raised to 800 °C and the pressure to 95.1 MPa using a multi-gradient cylinder heating and pressurization method, and the temperature and pressure were maintained for 8 hours. Then, the temperature inside the sample chamber of the cylinder was reduced to 167 °C and the pressure was reduced to 64.4 MPa. Finally, the pressure was released and the temperature was cooled to room temperature to obtain polycrystalline serpentine aggregate. This method fills the technical gap in the preparation of large-volume, water-rich magnesium silicate mineral experimental samples of high-density polycrystalline serpentine aggregate under high temperature and high pressure conditions.

This invention discloses a molding method for an injector assembly, belonging to the field of aerospace injector technology. The method includes: S1, alloy powder preparation: drying CuCrZr alloy atomized powder and stainless steel alloy atomized powder separately in a vacuum drying oven, followed by ultrasonic vibration treatment; S2, injector assembly model design: designing an injector model; S3, setting printing parameters: importing the model into a laser selective melting device and setting parameters; S4, laser printing: obtaining the injector part through laser printing; S5, surface treatment: performing surface treatment on the injector part; S6, hot isostatic pressing: welding the injector part through hot isostatic pressing; S7, post-processing: machining and polishing the injector. This invention provides a molding method for an injector assembly that improves material utilization, ensures stable operation of the injector, and to a certain extent solves the problems of numerous weld joints, long manufacturing cycles, and complex processes in injector assembly manufacturing.

The present application belongs to the technical field of high-performance metal matrix composites, and particularly relates to a SiC fiber reinforced metal matrix composite sample with controllable fiber fracture defects and a preparation method and application thereof. The preparation method of the sample comprises the following steps: (1) taking a SiC fiber reinforced metal matrix composite precursor filament; (2) making the precursor filaments axially parallel to each other and adhering and fixing them with an adhesive to obtain a precursor filament bundle, and then loading the precursor filament bundle into an alloy sheath; (3) plugging the two ends of the alloy sheath with plugs; and (4) performing hot isostatic pressing. According to a preset defect proportion, a defect distribution plane and a defect distribution mode, the present application calculates the cutting quantity, cutting position and distribution mode of the composite precursor filament sample. The present application changes the common fiber fracture defect phenomenon in the composite from a passive problem that needs to be avoided in the traditional way into an independent research variable that can be actively designed and controlled, and establishes a new type of "preformed defect" experimental method.

The present application relates to a kind of microalloy copper graphene composite material preparation method, it is characterized in that, the preparation method includes the following steps: mixing polysaccharide solution and microalloy copper powder, remove solvent, obtain coated microalloy copper powder;Hydrogen atmosphere sintering the coated microalloy copper powder, obtain graphene coated microalloy copper powder;The graphene coated microalloy copper powder is subjected to hot isostatic pressing and solid solution aging, obtain the microalloy copper graphene composite material.The preparation method provided by the present application is coated by polysaccharide and organic auxiliary agent at molecular level, makes the coating layer in situ conversion into uniformly attached to the surface of microalloy copper powder few-layer graphene or high-quality carbon layer when sintering, it is favorable to obtain the microalloy copper graphene composite material with uniform composition, interface is closely combined, high density, to meet the strict requirements of high-density electronic packaging and interconnection to material performance.

The present application relates to the technical field of target material manufacturing, and in particular to a ruthenium target material and a preparation method thereof. The method comprises: high-pressure cold die forming of ruthenium powder to obtain a ruthenium blank; placing the ruthenium blank in a metal sheath made of stainless steel or low-carbon steel, high-temperature vacuum pumping and exhaust, and welding to obtain a metal sheath containing the ruthenium blank; two-stage hot isostatic pressing sintering of the metal sheath containing the ruthenium blank; the pressure of the first-stage sintering is 130-150 MPa, and the temperature is greater than or equal to 1000 DEG C; the pressure of the second-stage sintering is 160-180 MPa, and the temperature of the second-stage sintering is higher than the temperature of the first-stage sintering by more than 150 DEG C. The ruthenium target material prepared by the present application has an average grain size of less than 5 mu m, a relative density of more than 99.5%, and the ruthenium target material and the metal sheath skin are easy to separate and not to adhere, and the target material yield is more than 98%, thereby reducing the manufacturing cost of the noble metal ruthenium target material and meeting the application requirements of advanced process integrated circuit chips.

This invention discloses a high-strength, ductile heterostructure ODS steel and its preparation method, belonging to the field of oxide dispersion strengthened (ODS) steel technology. The method first prepares Fe-Cr-W-Ti coarse-particle-size pre-alloyed powder using gas atomization technology, and then uses the pre-alloyed powder and Y2O3 nanoparticles as raw materials to obtain ODS powder through high-energy ball milling. Subsequently, the coarse-particle-size powder and ODS powder are mixed by low-energy ball milling to construct a heterostructure mixed powder. The resulting powder is then encapsulated in a stainless steel sleeve and subjected to high-temperature, high-vacuum degassing treatment. After sealing and welding, it is cured using a hot isostatic pressing process to finally obtain the high-strength, ductile heterostructure ODS steel. This invention effectively solves the bottleneck problem of the difficulty in synergistically improving the strength and ductility of traditional ODS steel through precise control of the heterostructure, providing a new technical route for the development of high-performance, low-cost nuclear structural materials.

This application discloses a CuCrNbZr alloy material, its preparation method, and its applications. The CuCrNbZr alloy material, by mass percentage, comprises: Cr: 2.2%~3.5%, Nb: 1.8%~3.0%, Zr: 0%~0.15%, with the balance being Cu. This CuCrNbZr alloy material is prepared through vacuum atomization powdering, hot isostatic pressing, and heat preservation cooling, and can be applied to the thrust chamber and nozzle of liquid rocket engines. Through the synergistic effect of specific component ratios and preparation processes, this application achieves a yield strength ≥150MPa, tensile strength ≥300MPa, and strength retention rate ≥85% after high-temperature brazing at 935℃~975℃. This solves the problems of rapid strength drop and insufficient structural reliability of traditional copper alloys after brazing, meeting the high-temperature and high-pressure requirements of hot-end components in liquid rocket engines.

This invention relates to a welding and forming method for titanium-steel dissimilar metal composite components, belonging to the field of dissimilar metal welding and forming. It solves the problems of easy defects in titanium alloy casting, low strength of titanium / steel welded joints, and lengthy process flow in existing technologies. The method includes: surface treatment of the alloy steel workpiece; preparation of a Ni-V alloy composite intermediate layer on the alloy steel surface; use of titanium alloy atomized powder; placing the alloy steel part in a steel cladding, filling it with titanium alloy powder, and sealing it; after vacuum degassing, performing integrated forming and welding using a three-stage hot isostatic pressing process: low-temperature pre-connection, high-temperature high-pressure densification, and cooling in-situ stress relief; finally, removing the cladding. This invention effectively suppresses the formation of the Fe-Ti brittle phase through the diffusion-blocking effect of the Ni-V intermediate layer and the synergistic control of the three-stage hot isostatic pressing, resulting in high interfacial strength. It is suitable for the preparation of various high-strength composite components of titanium alloys and alloy steels.

This invention discloses a hot isostatic pressing (HIP) and heat treatment process for high-temperature alloys. The process employs HIP followed by aging to eliminate porosity defects and improve the mechanical properties of the alloy. The treatment method consists of two steps: first, the alloy casting is subjected to HIP in a hot isostatic pressing apparatus; second, the HIP-pressed alloy component is placed in a muffle furnace under a protective atmosphere for aging treatment. This invention belongs to the field of high-temperature alloy heat treatment, specifically a HIP and heat treatment process for high-temperature alloys, aiming to eliminate internal porosity and obtain high-temperature alloys with excellent microstructure and properties.

The application discloses a preparation method of high-density, high-purity and large bulk polycrystalline omphacite aggregate, and the method comprises the following steps: completely sealing a omphacite sample powder in a ladle sleeve with a vacuum degree of 10 –3 Pa, placing the ladle sleeve in a graphite furnace cylinder body of a hot isostatic pressing device high-pressure container, covering a graphite sealing cover, taking argon as a pressure transmission medium, adopting a multi-gradient cylinder body temperature and pressure increasing mode to increase the temperature in the cylinder body sample bin to 1150 DEG C and the pressure to 98.6 MPa, and keeping temperature and pressure for 7.2 hours; reducing the temperature in the cylinder body sample bin to 177 DEG C at a rate of 15.95 DEG C / minute and reducing the pressure to 57.7 MPa at a rate of 0.67 MPa / minute; and finally, reducing the pressure to room temperature to obtain the polycrystalline omphacite aggregate, so that the technical blank of preparing a large bulk experimental sample of high-density polycrystalline omphacite aggregate under high temperature and high pressure conditions is solved.

This invention discloses a step-by-step fabrication process for an all-solid-state battery and an all-solid-state battery, belonging to the field of solid-state battery manufacturing technology. The fabrication process includes: preparing an electrolyte layer on the positive electrode side and stacking it with a composite positive electrode, followed by hot isostatic pressing to form a dense positive electrode side structure; preparing a lithium metal or lithium alloy negative electrode composite and forming a negative electrode side electrolyte layer on its surface; alternately stacking the positive and negative electrode side structures and encapsulating them, followed by cold isostatic pressing to obtain the finished all-solid-state battery. This invention, by implementing differentiated pressure treatments on the positive and negative electrode sides, effectively suppresses the plastic flow and permeation failure of lithium metal or lithium alloy under high pressure conditions while ensuring high density of the composite positive electrode and electrolyte layer, reducing the risk of internal short circuits, and significantly improving interface stability and lithium dendrite suppression performance, thereby achieving a synergistic improvement in the safety, energy density, and rate performance of the all-solid-state battery.

The present application belongs to the technical field of hard alloy material, and particularly relates to a hard alloy for hard rock tooth and a preparation method thereof. The method comprises the following steps: mixing coarse tungsten carbide powder, submicron tungsten carbide powder, cobalt powder, nickel powder, chromium carbide powder, vanadium carbide powder, tantalum carbide powder, niobium carbide powder, dimolybdenum carbide powder, graphite powder, tantalum-niobium-zirconium composite carbide solid solution pinning body and yttrium-doped cerium oxide toughening control body, ball milling, drying, crushing, sieving, granulating, die pressing, cold isostatic pressing, degreasing, vacuum sintering, hot isostatic pressing treatment, grinding, cleaning and drying. The present application can inhibit grain growth by multiple carbides, and can improve the grain boundary and binder phase distribution by using rare earth oxides, so that the obtained hard alloy has good wear resistance, impact resistance and anti-chipping performance, and is suitable for hard rock tooth.

This invention relates to a method for preparing a thick, crack-free hardface alloy layer using a stainless steel lattice structure, comprising the following steps: S1 Substrate machining: A 316L stainless steel ingot is machined to the required cylindrical size to obtain the substrate; the surface of the substrate is ground to control the roughness; S2 Laser selective cladding of the lattice structure: A laser selective cladding process is performed on the surface of the substrate using cladding powder, and a lattice structure is printed to obtain the sample; S3 Sheath preparation and installation: A cylindrical steel sheath is prepared, and the sample is installed into the steel sheath; S4 Hardface alloy powder filling: Hardface alloy powder is filled into the lattice structure; S5 Sealing, leak detection, and vacuuming; S6 Hot isostatic pressing; S7 Sheath removal: The sheath is removed by turning, and the material is machined to a suitable size to obtain a thick, crack-free hardface alloy layer. This invention is simple and can significantly improve the service life of the hardface alloy layer and reduce replacement costs.

This application discloses a method for integral conformal slicing of metal powder in hot isostatic pressing (HIP). By digitally discretizing and conformally slicing the target component, a metal powder filling area and a ceramic medium filling area matching the component's contour are defined, generating a corresponding coaxial powder feeding path. A pre-heat-force coupled numerical simulation is used to obtain the global and local shrinkage rate distribution of the component, completing the reverse pre-correction between the digital model and the process. Dual-hopper coaxial powder feeding is used for precise layered filling within a repeatable, universal rigid casing, supplemented by vibration-compaction densification followed by vacuum sealing. After three-stage HIP densification matching the simulation boundary, the casing and ceramic medium are removed to obtain the finished product. This application completely eliminates the reliance on traditional custom casings, solving the industry pain points of high cost, long cycle time, difficulty in forming complex components, and poor dimensional accuracy in HIP processes. Mold costs are reduced, production cycles are shortened, and component dimensional accuracy is ≤±0.2%, making it suitable for low-cost, high-precision fabrication of complex metal components.

This invention relates to the field of knife manufacturing technology and discloses a method for preparing a knife with antibacterial effects, comprising the following steps: smelting a nitrogen-containing antibacterial martensitic stainless steel blade blank; heating, cooling, and tempering the nitrogen-containing antibacterial martensitic stainless steel blade blank to obtain the blade; hot isostatic pressing of a pure titanium ingot to obtain a densified titanium metal handle; and connecting the blade to the densified titanium metal handle using a tin-silver-based brazing filler metal at 680°C to 750°C via induction heating. This invention solves the problems of decreased hardness and corrosion resistance caused by silver precipitation through the synergistic effect of nitrogen and silver, utilizing nitrogen solid solution strengthening and potential compensation mechanisms; and employs a low-temperature tin-containing brazing process to construct a physical barrier layer, blocking carbon diffusion to the titanium side and the formation of brittle phases, thus avoiding over-tempering softening of the blade substrate, resulting in a knife with high hardness, corrosion resistance, long-lasting antibacterial properties, and high connection strength.

The present application belongs to the field of nuclear fusion technology, and particularly relates to a method for hot isostatic pressing connection of a double-interlayer nickel-based alloy and a niobium-based alloy. The present application comprises the following steps: machining, jacket making, cleaning, assembling, packaging, leak detection, vacuum pumping, clamping and sealing, and hot isostatic pressing. By adding palladium / palladium-based alloy and molybdenum-based alloy as the double-interlayer, and by controlling the hot isostatic pressing system, reliable metallurgical bonding of the connection interface is achieved, no intermetallic compound is generated, the elements of the connection interface are excessively uniform, and the whole has high high-temperature connection strength. The present application can be used for manufacturing of the connection components of the nickel-based alloy and the niobium-based alloy in the high-temperature fusion reactor, and can meet the comprehensive use performance of the materials.

The application relates to the technical field of target materials, and provides a CrCuAg alloy target material for antibacterial plating and a preparation method thereof, wherein the preparation method comprises the following steps: mixing Cr powder, Cu powder and Ag powder under the protection of inert gas to obtain mixed powder through mechanical ball milling; filling the mixed powder into a can, and the relative density of the filled can is greater than or equal to 55 %; performing vacuum thermal degassing on the filled can; performing hot isostatic pressing liquid phase sintering on the can after the vacuum thermal degassing is completed to obtain a CrCuAg alloy target material blank; and removing the can from the CrCuAg alloy target material blank to obtain the CrCuAg alloy target material. Through the synergistic design of the specific particle size grading and the hot isostatic pressing liquid phase sintering process, the densification problem caused by the large melting point difference of Cr, Cu and Ag is solved, the high-performance antibacterial alloy target material with a relative density greater than 99 % can be prepared, and the Cr substrate has high hardness and wear resistance and the Cu and Ag have the synergistic antibacterial function.