41 results about "Titanium foil" patented technology

This invention provides a method for preparing (002) crystal-plane oriented metallic zinc and its application. The invention employs a two-electrode electrochemical deposition technique, using iron foil, titanium foil, or copper foil as the working electrode, commercial zinc foil as the counter electrode, and an aqueous zinc salt solution as the electrolyte. Constant current density discharge deposition is used to deposit (002) crystal-plane oriented metallic zinc on the working electrode; the constant current density is 50 mA cm⁻¹. ‑2 ~200 mA cm ‑2 The (002) crystal-plane oriented metallic zinc prepared by this invention can be used in rechargeable zinc-ion batteries. The two-electrode electrolytic cell device used in the preparation of metallic zinc in this invention is simple, the preparation process is straightforward, and the preparation method is more universal. The (002) crystal-plane oriented metallic zinc prepared according to the method of this invention can suppress zinc dendrite growth and hydrogen evolution, thereby improving the service life of rechargeable zinc-ion batteries.

The application relates to a preparation method of a tin dioxide negative material, and belongs to the technical field of lithium battery negative material synthesis. The application aims at solving the problems of the existing SnO2 negative material, such as large volume effect in the charging and discharging process, easy falling off on the current collector, complex preparation process of the SnO2 negative material and high cost. The preparation method comprises the following steps: S1, preparing a micro-arc oxidation electrolyte; S2, placing a titanium foil and the micro-arc oxidation electrolyte in a micro-arc oxidation electrolytic tank, taking the titanium foil as a positive electrode and a stainless steel plate as a negative electrode; and S3, micro-arc oxidation. The application is used for the preparation of the tin dioxide negative material.

This invention discloses a vacuum hot pressing process for titanium foil, comprising the following steps: S1, roll cutting; S2, sheet cleaning; S3, loading fixture; S4, vacuum hot pressing; ensuring the sheet surface is clean and dust-free during the cleaning process; the loading fixture ensures the sheet is flat and the fixture is locked; the vacuum heat treatment process ensures the vacuum degree of the heat treatment furnace, and the heat preservation temperature is adjusted according to the flatness standard; high-purity argon gas is introduced during the cooling process to ensure that no micro-oxide layer is generated on the sheet surface, thereby improving the surface quality of the titanium foil.

The badminton racket comprises a badminton racket body, the badminton racket body comprises a racket frame, a racket rod and a handle which are integrally arranged, the racket rod comprises an outer carbon fiber layer and an inner titanium foil film layer, and the racket rod is formed by winding and curing the carbon fiber layer and the titanium foil film layer. According to the badminton racket, the titanium foil film layer is additionally arranged on the racket rod, and the titanium foil film is light in weight and higher than carbon fiber cloth in strength, so that the rigidity and the stability of the racket rod can be improved under the condition that the weight is not obviously increased; the titanium foil film has a good damping characteristic and can absorb vibration during ball hitting, the cushioning effect is improved, and the ball hitting accuracy and the hand feeling comfort degree are improved; the four layers of carbon fiber cloth are laid at the angles of 0 degree, 45 degrees, 90 degrees and 135 degrees respectively to form a structure shaped like a Chinese character'mi ', so that the racket rod is firmer and more durable and not prone to being broken and bent. The racket is novel in structure, capable of effectively improving the hitting feeling of the racket body and suitable for popularization.

The utility model relates to the technical field of titanium foil adhesive tapes, in particular to a high-shielding composite titanium foil adhesive tape. The titanium foil adhesive tape comprises a titanium foil adhesive tape body and a circular frame, the inner wall of the titanium foil adhesive tape body and the circular frame are fixedly installed, the inner surface of the circular frame is fixedly connected with two fixing rods, the ends, close to each other, of the two fixing rods are fixedly connected with a cylinder, one end of the cylinder is rotationally connected with a rotating shaft, and the rotating shaft is fixedly connected with the titanium foil adhesive tape body. An L-shaped plate is fixedly connected to one end of the rotating shaft, a pull rod is slidably inserted into the L-shaped plate, a pull plate is fixedly connected to one end of the pull rod, an abutting plate is fixedly connected to the end, away from the pull plate, of the pull rod, and the abutting plate is slidably connected with the surface of the titanium foil adhesive tape body. The titanium foil adhesive tape solves the problems that when the titanium foil adhesive tape body is used, if the titanium foil adhesive tape body is not flat, an air gap exists, the contact area between the titanium foil adhesive tape body and an adhered object is reduced by the air gap, and the viscosity of the titanium foil adhesive tape body cannot be fully exerted.

The invention discloses a preparation method of a polymer copolymerization modified aqueous zinc ion battery negative electrode, and belongs to the technical field of zinc ion batteries. According to the technical scheme, the preparation method comprises the following steps: carrying out copolymerization reaction on aniline and fluoroaniline, freeze-drying to obtain an aniline-fluoroaniline copolymer, slowly stirring the aniline-fluoroaniline copolymer, zinc powder and a solvent, adding a conductive agent and a binder, and rapidly stirring to prepare slurry; and coating a copper foil or a titanium foil with the slurry to obtain the polymer copolymerization modified aqueous zinc ion battery negative electrode. The polymer copolymerization modified aqueous zinc ion battery negative electrode has the beneficial effects that the polymer copolymerization modified aqueous zinc ion battery negative electrode has good electronic conductivity and excellent interface regulation and control capability, zinc dendrite growth and hydrogen evolution reaction can be effectively inhibited, and the diffusion efficiency of zinc ions is improved, so that the cycling stability and the battery performance of the zinc negative electrode are remarkably improved; the technical problems that an existing modification material is poor in adhesion, low in conductivity, serious in electrode polarization and the like are solved.

The invention discloses a method for improving the performance of a TA4-0. 1B titanium material, and belongs to the technical field of titanium metal material preparation. The oxygen content of the TA4-0. 1B titanium material is controlled to be 0.2-0.4 wt%, and the TA4-0. 1B titanium material contains B with the fixed addition amount being 0.1 wt%, and the balance Ti and inevitable impurities. In the preparation process, TiO2 powder and TiB2 powder are wrapped by pure titanium foil to form a plurality of material bags, the material bags are divided into three equal parts, and sponge titanium is divided into four equal parts; raw materials are sequentially filled in a layered manner according to a manner of'titanium sponge, material package, titanium sponge, material package, titanium sponge, material package and titanium sponge 'and are pressed into columnar material blocks as consumable electrodes. The obtained electrode block is smelted twice through a vacuum self-consuming electric arc smelting furnace, a TA4-0. 1B-xO alloy cast ingot with uniform components is obtained, and the TA4-0. 1B-xO alloy cast ingot is machined through an ingot casting machine and subjected to non-forging direct rolling to form a plate; through fixation of the B content and graded regulation and control of the oxygen content, balance between high strength and high plasticity is achieved, and the yield ratio of the alloy can be effectively improved through coordinated regulation and control of the two elements, so that the application of TA4 titanium materials in the fields of aerospace, medical implants, high-strength structural parts and the like is expanded.

The application relates to the field of photocatalysis, in particular to a composite material for photocatalytic degradation of PFOA and a preparation method thereof. The composite material comprises the following steps: step one: using titanium foil as an anode and a nickel sheet as a cathode, carrying out anodic oxidation, and then annealing to obtain TiO2-NT; step two: first, acid pickling TiO2-NT, and then preparing TiO2-NT suspension liquid; adding chloroplatinic acid, a dispersing agent and potassium borohydride into the TiO2-NT suspension liquid to prepare a Pt / TiO2-NT composite material; step three: coating ammonium perrhenate on the Pt / TiO2-NT composite material, and then sintering, repeating 1-2 times to obtain a modified Pt / TiO2-NT composite material; and step four: preparing a MIP-Pt / TiO2-NT composite material through a molecular imprinting technology.

The invention relates to the technical field of metal layered composite materials, in particular to a preparation method of a graphite film / titanium alloy layered composite structure, which comprises the following steps: carrying out plasma treatment on the surface of a graphite film; placing the graphite film and the titanium foil which are subjected to plasma treatment on a substrate, and alternately carrying out ultrasonic consolidation layer by layer to obtain a layered composite material prefabricated blank; and the layered composite material prefabricated blank is put into a vacuum hot pressing furnace to be subjected to bending forming and interface reaction in sequence, and the graphite film / titanium alloy layered composite structure is obtained. The preparation method of the graphite film / titanium alloy layered composite structure aims at solving the problems of heat resistance of titanium alloy used in a high-temperature environment and structural instability caused by overhigh local temperature.

The invention discloses a process method for improving the single-time synthesis yield of colorless diamond. The process method comprises the steps of preparing a prefabricated catalyst layer, prefabricating a carbon source layer, assembling, synthesizing at high temperature and high pressure and the like. The preparation of the prefabricated catalyst layer and the prefabricated carbon source layer is performed through one-time synthesis, and the catalyst and the graphite are subjected to pre-nitrogen removal treatment, so that the nitrogen removal efficiency is improved, the use amount of titanium foils can be reduced, and the production cost is reduced; on the other hand, the density of catalyst and carbon source finished products is effectively improved, the contractibility is reduced, the uniformity is improved, the synthesis stability is good in a long process period, the growth cavity is expanded to the maximum extent, the synthesis space is fully utilized, and the single-time synthesis yield can reach 100 ct or above. The prefabricated catalyst layer and the prefabricated carbon source layer are prepared through one-time synthesis, the contractibility of the catalyst and carbon source finished product can be effectively reduced, the uniformity of the catalyst and carbon source finished product can be improved, the current can not be reduced in the synthesis process, and precise fine adjustment is achieved.

The application discloses a titanium foil-based ceramic filter screen material and a preparation method thereof, and belongs to the technical field of precision filter materials.The titanium foil-based ceramic filter screen material comprises a titanium foil base body and a micro-arc oxidation ceramic layer, and a plurality of laser-prepared through holes are arranged on the titanium foil base body, wherein the micro-arc oxidation ceramic layer is distributed on the surface of the titanium foil base body and the inner walls of the plurality of laser-prepared through holes, so that the technical problems that the toughness, temperature resistance and corrosion resistance of the filter screen are difficult to be considered simultaneously, the micro-arc oxidation on the titanium foil base body is directly broken through to form holes, and the filter screen is easy to break are solved, the technical effect that the filtering precision and the filter screen aperture are controllable, the structure is stable, the performance is excellent, mass production is achieved, and the continuous production of roll-to-roll is suitable is achieved.

The invention provides a titanium foil bipolar plate base material with low anisotropic roughness and a screening method thereof. The screening method comprises the following steps: measuring the roughness RaRD of the surface of a titanium foil base material to be selected along a rolling direction RD and the roughness RaTD of the surface of the titanium foil base material to be selected along a vertical rolling direction TD; calculating the ratio of the RaTD to the RaRD; selecting a base material satisfying RaRD < = 65nm, RaTD < = 85nm and RaTD / RaRD < = 1.5 at the same time; and depositing a carbon-based coating on the surface of the base material by adopting a cathode arc ion plating technology, wherein the arc current is controlled within 50A-100A, and the total thickness of the coating is 50-100A. The anisotropic roughness of the surface of the titanium foil base material can be effectively controlled, collaborative optimization of the PVD carbon coating in the aspects of interface contact resistance and corrosion resistance is achieved, and the performance stability and consistency of the fuel cell bipolar plate are remarkably improved.

The application discloses a SiCp / Al laser welding method for constructing gradient heterogeneous interfaces by matching high-entropy alloy and intermediate layer, and relates to the technical field of metal matrix composite welding. The method comprises the following steps: S1, pretreating the surfaces to be welded and heterogeneous metal foils; S2, mixing 50%-80% of homogeneous aluminum alloy powder, 5%-30% of AlCoCrFeNi high-entropy alloy powder and active auxiliary components to prepare a pre-filled material; S3, coating the pre-filled material on the joint cross section and / or upper surface, and clamping and fixing the heterogeneous metal foils at the center position of the joint; and S4, performing laser welding. The core of the method is that when the content of the high-entropy alloy is 5%-20%, the titanium foils with a matching thickness of 20-100 microns or the zirconium foils with a matching thickness of 50-150 microns can actively construct the organizational structure with continuous composition transition and phase gradient distribution in the heterogeneous interface region. The application effectively alleviates the interface stress concentration caused by the mismatch of thermal physical properties, significantly inhibits the brittle fracture of the joint, and improves the comprehensive mechanical properties of the welded joint.

The invention discloses a preparation method of a hydrogen absorption sheet without activation, which comprises the following steps: (1) cleaning: cleaning a titanium foil substrate to remove surface dirt and oxide; (2) coating pretreatment: rapidly transferring the cleaned and blow-dried titanium foil to a cavity of a magnetron sputtering coating machine, vacuumizing until the vacuum degree is superior to 4 * 10 < 14 > Pa, carrying out in-situ heating treatment on a titanium foil substrate, preserving heat at 200-400 DEG C for 0.5-2 hours, and then cooling to room temperature; (3) coating: preparing a Pd film or a Pd-based alloy film with the thickness of 50-300nm on the titanium foil substrate by adopting a magnetron sputtering coating process; and (4) punch forming is conducted, specifically, the titanium foil plated with the Pd film or the Pd-based alloy film is punched, and the hydrogen absorption sheet with the boundary dimension being 1-20 mm and the thickness being 0.1-0.5 mm is obtained. The prepared hydrogen absorption sheet is mainly used for controlling the content of hydrogen in various solid-state microwave devices and assemblies in the field of microelectronic packaging and does not need to be activated before being used, the devices and the assemblies using the hydrogen absorption sheet do not need to be subjected to additional baking hydrogen removal treatment, and the production efficiency is improved.

The present application relates to the technical field of photocatalytic degradation materials, in particular to a photocatalytic material for degrading PFOA and a preparation method thereof. The present application uses titanium foil as a TiO2 NT template in an electrochemical reactor with a direct current power supply, uses the titanium foil as an anode and graphite as a cathode, obtains highly ordered and vertically arranged TiO2 NTs after anodic oxidation, and modifies the TiO2 NTs through MIP. The molecular imprinting technology can enable the photocatalyst to selectively identify and combine with target molecules with high affinity. The doping of metal iron ions can introduce new energy levels in the band gap of the semiconductor TiO2, thereby enhancing the visible light absorption capacity of TiO2 by adjusting the band gap. Not only can the visible light absorption capacity of TiO2 be enhanced, but also the adsorption capacity of the target pollutant PFOA can be improved, thereby promoting the efficient degradation of PFOA.

The invention discloses a praseodymium target and a preparation method and application thereof, and belongs to the technical field of nuclear target preparation. The praseodymium target comprises a titanium foil substrate, a praseodymium film deposited on the titanium foil substrate and a carbon film covering the praseodymium film. The preparation method comprises the following steps: preparing a substrate: cutting a titanium foil and fixing the titanium foil on a target frame; plating a praseodymium film by vacuum evaporation: placing the target frame fixed with the titanium foil in vacuum evaporation equipment, putting a metal praseodymium evaporation material, vacuumizing, adding evaporation current for evaporation, and depositing on the titanium foil substrate to obtain the praseodymium film; the titanium foil plated with the praseodymium film is transferred into vacuum magnetron sputtering equipment, the carbon target serves as a sputtering target, vacuumizing is conducted, magnetron sputtering is conducted in the argon atmosphere, the carbon film is deposited on the surface of the praseodymium film, and then the praseodymium target is obtained. The problem that the praseodymium material is prone to oxidation is solved, the praseodymium target meeting the nuclear physics experiment requirement is obtained, and the scheme is high in operability and practicability.

The invention provides an electro-catalysis electrode with oxygen vacancies and a preparation method and application thereof, and belongs to the field of electro-catalysis electrodes. The preparation method comprises the following steps: taking a pretreated titanium foil as an anode, carrying out anodic oxidation in an electrolyte containing ammonium fluoride, and annealing to obtain anatase-phase TNAs; taking TNAs as a working electrode, carrying out electro-deposition in a sodium pyrophosphate electrolyte containing Sn < 2 + > by adopting a commutation pulse constant current method, and annealing to obtain a TNAs / SnO2 electrode; taking the TNAs / SnO2 electrode as a working electrode, and applying negative voltage to the working electrode in a neutral electrolyte to carry out rapid constant potential reduction to obtain a TNAs / Ov-SnO2 electrode; and taking the TNAs / Ov-SnO2 electrode as a working electrode, carrying out electro-deposition in an electrolyte containing RuCl3 by adopting a cyclic voltammetry method, and annealing to obtain the TNAs / Ov-SnO2 / RuO2 electrode. When the electrocatalytic electrode is prepared, an electrochemical cathode reduction method is introduced, oxygen vacancies are rapidly, simply and conveniently prepared on the surface of SnO2, high temperature and a chemical reducing agent are not needed, and introduction of impurities is avoided.

The online alpha combination detector of the application integrates ZnS(Ag) detector and PIPS (ion implantation type passivated silicon) detector; ZnS(Ag) and PIPS are not sensitive to environmental gamma rays, so that the device of the application has a lower background and a lower detection limit without additional shielding device; ZnS(Ag) is also not sensitive to beta rays, and the interference of beta rays on ZnS(Ag) can be ignored by reasonably setting the threshold value; for PIPS, the energy spectrum of beta rays is concentrated in the low energy region, and the interference of beta rays can also be excluded by energy spectrum analysis algorithm or improving the lower limit of the energy spectrum threshold; in this way, the influence of beta and gamma rays on the combination detector for measuring alpha particles is greatly reduced, and the detection accuracy of alpha particles is improved; the ZnS(Ag) detector is coupled with multiple PMTs, which further ensures the detection efficiency; the detection window structure benefits from the unique design and is easy to replace; the window materials such as aluminum foil, titanium foil and gold foil are flexibly adapted; the detector is resistant to strong acid and strong alkali and corrosion, and has a wider use scenario.

The invention discloses a copper-titanium alloy-based composite zinc negative electrode as well as a preparation method and application thereof, and belongs to the field of battery materials. The preparation method of the composite zinc negative electrode comprises the following steps: S1, stacking a titanium foil and a copper foil together, fitting the smooth surface of the copper foil with the titanium foil, then rolling into a cylinder structure, fixing, and calcining in a protective gas atmosphere to obtain a calcined titanium foil and a calcined copper foil; and S2, depositing a zinc layer on the calcined titanium foil or the calcined copper foil through electrochemical deposition to obtain the composite zinc negative electrode. The method is simple in process, the titanium foil and the copper foil only need to be tightly stacked and then calcined, the substrate with the specific micro-morphology structure can be obtained, then the zinc layer is deposited on the surface of the substrate, the composite zinc negative electrode is obtained, the micro-morphology structure can change the nucleation point position of zinc deposition, and therefore zinc can be better guided to be evenly deposited, and the service life of the composite zinc negative electrode is prolonged. The disordered growth of zinc dendrites is reduced, the polarization voltage of the battery is reduced, and the cycling stability of the battery is improved.

The application provides a gradient tension control rewinding process method based on a micron wide titanium foil, and relates to the technical field of non-ferrous metal processing. The method is suitable for titanium foil with a thickness of 0.01-0.1 mm and a width of greater than or equal to 600 mm. The method comprises the following steps: surface cleaning and drying of the titanium foil after cold rolling; gradient rewinding on a rewinding machine according to a preset roll diameter-tension control curve, so that the interlayer pressure gradually decreases from inside to outside; optionally adding a detachable porous isolation belt in the winding process to form an air flow channel to improve the flowability and uniformity of the protective atmosphere in the annealing process; and directly sending the rewound titanium foil into vacuum / cover annealing after roll shape correction. The method can effectively reduce the risk of interlayer adhesion at high temperature, improve the temperature uniformity and organizational performance of the core layer, the intermediate layer and the outer layer in the annealing process, and fills the technical gap in the field of vacuum / cover annealing interlayer adhesion.

The invention discloses a water-based zinc ion flexible soft package battery and a preparation method thereof, and belongs to the field of water-based zinc ion batteries. Titanium foils with the thickness of 30 microns are respectively used as a positive current collector and a negative current collector and are subjected to sand blasting / acid pickling activation; pulping according to the ratio of zinc powder to conductive carbon black to PVDF of 8: 1: 1, adding 1wt% of polyethylene glycol PEG, coating a titanium foil with the slurry, drying to form a negative electrode and a positive electrode, laminating the negative electrode and the positive electrode with a diaphragm, and performing heat sealing on three sides to form a shell; and injecting 2M ZnSO4 electrolyte at a negative pressure controlled temperature, and carrying out cold source auxiliary tail end heat sealing to obtain the double-titanium foil current collector flexible soft package battery. Titanium foil surface activation and polymer reconstruction solvation and ion channels are adopted, so that zinc nucleation overpotential and interface charge transfer impedance are reduced, hydrogen evolution and dendritic crystal / pulverization are remarkably inhibited, the cycle capacity retention ratio is increased, and the swelling risk is reduced; the positive electrode and the negative electrode are titanium foils, thermal-mechanical matching is achieved, and volume and stress are buffered in cooperation with a flexible network; and the voltage polarization under the bending condition is small, and the contact resistance increase is low.

The application discloses a two-stage heterogeneous layered Ti-Al composite material and a preparation method thereof. The two-stage heterogeneous layered Ti-Al composite material comprises a titanium foil bottom layer, and at least one structural unit layer is sequentially solidified on the upper surface of the titanium foil bottom layer; the structural unit layer is formed by laminating and solidifying at least one coarse-grained aluminum foil layer, at least one fine-grained aluminum foil layer and a titanium foil surface layer; the coarse-grained aluminum foil and the fine-grained aluminum foil are alternately arranged; and the titanium foil surface layer is located at the uppermost layer of the structural unit layer. The preparation method of the two-stage heterogeneous layered Ti-Al composite material is as follows: on the basis of a friction stir fine-grained processing, fine-grained aluminum foils and coarse-grained aluminum foils and titanium foils are solidified and formed under low-temperature conditions by using an ultrasonic additive manufacturing technology; the two-stage heterogeneous layered structure has small residual stress, compact structure, quantitatively controllable thickness proportion of coarse-grained and fine-grained layers and titanium-aluminum layers, and tightly combined interfaces between layers; and the comprehensive mechanical properties of the alloy material can be effectively improved.

The invention is related to a silicon composite material for use as a rechargeable battery anode, comprising (i) an electrically conductive substrate comprising a foil of copper or titanium, (ii) an adhesion layer attached to the foil comprising at least one or more metals and / or metal compounds and (iii) an electrode layer comprising silicon attached to the adhesion layer.

This invention provides a grinding-free preparation process and application for ultra-thin bilayer metal composite strips, relating to the technical field of ultra-thin bilayer metal composite strips. The grinding-free preparation process includes steps such as metal substrate cutting, pre-rolling annealing, cleaning, combined rolling with roughened rolls and traditional flat rolls, post-rolling annealing, and cooling. This invention uses any two metals, such as copper foil, titanium foil, or stainless steel, as the substrate. By optimizing the annealing temperature and reduction rate, it achieves efficient composite under low reduction rate conditions, simplifying the process and improving production efficiency. The composite ultra-thin strip prepared by this invention exhibits a regular pit array structure on its surface, significantly improving interfacial bonding strength. It also possesses hydrophobicity, low thermal conductivity, drag reduction, and electromagnetic wave anti-reflection properties, making it suitable for high-end applications in the aerospace and electronics industries, with broad prospects.

The utility model discloses an electron accelerator under-beam automatic washing device which comprises a supporting frame, a titanium foil guide rail, a power element, a cleaning module and an automatic control system, a pneumatic motor drives a titanium foil to move in a reciprocating mode, and cleaning and drying are achieved in combination with a pressure water gun, a water absorption roller and a blow-drying system. A stepping motor adjusts the inclination angle of the titanium foil to improve the drainage efficiency, a lead plate or lead glass material is adopted for radiation protection, and an automatic control system achieves full-automatic control. The titanium foil cleaning device solves the problem that the titanium foil needs to be shut down for cleaning in a high-temperature and radiation environment, the continuous operation efficiency of equipment is improved, and the service life of the titanium foil is prolonged.

This invention provides a cluster-type roll system structure for cold-rolled ultrathin wide titanium foil, relating to the field of metal rolling technology. The structure includes an upper work roll, a lower work roll, two upper support rolls, two lower support rolls, and two pressure rolls. The work rolls are supported on both sides by the upper and lower support rolls, respectively, while the pressure rolls act on the upper support rolls and are independently load-adjusted. By applying differential loads to the support rolls through the pressure rolls, designing a linear taper zone at the end of the work rolls, and increasing the overall convexity of the support rolls, the roll gap load-bearing capacity and lateral pressure distribution are stabilized, suppressing uneven plastic deformation at the edges and sheet shape defects. The roll system structure designed in this invention has the advantages of high rolling stability, fast lateral thickness difference convergence, and strong sheet shape control, effectively solving the problems of tolerance accuracy, thickness reduction capability, and surface morphology distribution of wedge-shaped materials.

This application discloses a process for improving the corrosion resistance of ductile iron surfaces, relating to the field of metal material surface processing technology. First, the surface of the ductile iron casting is pretreated to remove impurities. Then, a first laser cladding process is performed using alloy powder with high iron content to enhance the bonding between the coating and the substrate. A second laser cladding process is then performed using alloy powder with medium iron content and small amounts of chromium, molybdenum, and vanadium powders to increase the coating hardness. The casting after the second laser cladding is then polished, and pure titanium foil is used to cover the casting. A third laser cladding process is then performed using stainless steel powder, titanium powder, and a small amount of auxiliary powders to form a uniformly distributed titanium-rich layer. Finally, plasma nitriding is performed to form a uniform titanium nitride layer. This application's solution can effectively improve the bonding strength between the coating and the casting, and significantly enhance the wear and corrosion resistance of the casting, making it suitable for surface strengthening of mechanical components under complex operating conditions.

The invention relates to the technical field of precise cold-rolled titanium foils, in particular to a low-surface-roughness cold-rolled titanium foil and a preparation method thereof. The titanium foil is prepared by the method. The method comprises the steps that a pretreated titanium strip coil is subjected to cold rolling to a first middle thickness, and a first middle strip coil is obtained; after the first middle strip coil is subjected to alkali washing, first complete annealing treatment is conducted under the protective atmosphere, and an annealed first middle strip coil is obtained; the first intermediate strip coil in the annealing state is subjected to cold rolling to a second intermediate thickness, and a second intermediate strip coil is obtained; after alkali washing is conducted on the second middle strip coil, second complete annealing treatment is conducted under the protective atmosphere, and an annealed second middle strip coil is obtained; and after alkali washing is conducted on the annealed second middle strip coil, cold rolling is conducted till the thickness of a finished product is achieved, and the low-surface-roughness cold-rolled titanium foil is obtained. By means of the method, the cold-rolled titanium foil with the surface roughness Ra smaller than or equal to 0.15 microns can be prepared, the roll sticking phenomenon is avoided, and surface defects are avoided.

The invention discloses a method for rapidly preparing silver-copper-titanium foil strip brazing filler metal, and belongs to the technical field of active brazing filler metal. The preparation method comprises the following steps: (1) uniformly mixing silver-copper alloy powder and titanium powder or titanium hydride powder, pressing into a block blank, and sintering to obtain a silver-copper-titanium block blank or a silver-copper titanium hydride block blank; (2) the block blank is subjected to multi-group cold rolling and intermediate annealing circulation treatment till the thickness meets the requirement, and plate strip brazing filler metal is obtained; and (3) carrying out vacuum annealing and cold rolling on the plate strip brazing filler metal to obtain the finished product silver-copper-titanium foil strip brazing filler metal. The preparation method is optimally designed, generation of copper-titanium compounds is effectively inhibited, the types and forms of the copper-titanium compounds are regulated and controlled, the machinability and activity of the brazing filler metal are guaranteed, the preparation period of the brazing filler metal is remarkably shortened, and high-efficiency and high-quality preparation of the foil strip brazing filler metal with the high titanium content is achieved.

The invention relates to the technical field of precision machining of non-ferrous metals, in particular to a titanium foil with uniform surface roughness and a preparation method of the titanium foil. The titanium foil is prepared by the method. The method comprises the following steps: degreasing a completely annealed titanium strip coil; the degreased titanium strip coil is subjected to intermediate rolling, and an intermediate strip coil is obtained; carrying out alkali washing on the intermediate strip coil, and carrying out intermediate annealing treatment to obtain an intermediate strip coil in an annealing state; the intermediate strip coil in the annealing state is subjected to finished product rolling, and a finished product coil is obtained; carrying out alkali washing on the finished product roll, and carrying out finished product annealing treatment to obtain an annealed finished product roll; and after the finished product roll in the annealing state is pulled, straightened and leveled, the titanium foil with the uniform surface roughness is obtained. The transverse and longitudinal roughness of the surface of the prepared titanium foil is uniform, and the prepared titanium foil further has good deep drawing performance.