515 results about "Bronze" patented technology

The disclosure provides a modified tin-phosphor bronze alloy and a preparation method thereof. The modified tin-phosphor bronze alloy comprises the following elements in percentage by mass: 4.0-10 wt % of Sn, 0.01-0.3 wt % of P and the balance of Cu and inevitable impurity elements, the average grain size of the modified tin-phosphor bronze alloy is 1-3 μm, the grain size is in normal distribution, and the standard deviation of the grain size is below 0.8 μm; the proportion of the total low-CSL grain boundary in the modified tin-phosphor bronze alloy in the whole grain boundary is 66-74%, and in the total low-ΣCSL grain boundary, the ratio range of (Σ9+Σ27) / Σ3 is (0.12-0.23):1. The modified tin-phosphor bronze alloy of this disclosure enables a finished alloy can give consideration to both tensile strength and excellent bending performance.

The invention relates to a high-stability bronze powder pigment and a preparation method and application thereof.The preparation method comprises the following steps that copper-zinc alloy coarse powder, stearic acid and a dissolved compound passivator are taken and subjected to ball milling in the nitrogen atmosphere, and a ball milling product is screened, washed and subjected to suction filtration to obtain an amino-functionalized passivated base material; the preparation method comprises the following steps: dispersing SiO2 in anhydrous isopropanol to obtain a reaction system, adding deionized water and a catalyst, dissolving tetraethoxysilane and phenyltriethoxysilane in anhydrous isopropanol, slowly dropwise adding, carrying out a heat preservation reaction, and carrying out suction filtration and washing to obtain a phenyl modified SiO2 coated intermediate; the preparation method comprises the following steps: dispersing a compound stabilizer in anhydrous isopropanol to obtain a mixed system, heating and stirring, dissolving the compound stabilizer in anhydrous isopropanol, dropwise adding into the mixed system, reacting, centrifuging, washing, and drying in vacuum to obtain the bronze powder pigment. The bronze powder pigment disclosed by the invention has excellent oxidation resistance, chemical corrosion resistance and long-term storage stability, and can keep the natural color gloss of metal to the greatest extent.

The invention provides a preparation method of a copper-aluminum composite board, which comprises the following steps: S1, carrying out rolling processing on a copper plate, and processing a plurality of embossments on the surface of the copper plate; s2, sequentially carrying out alkali washing, annealing treatment and acid washing on the rolled copper plate; s3, a hot-rolled aluminum plate is selected, and the surface of the aluminum plate is mechanically polished; s4, the floating convex face of the pickled copper plate and the mechanical polishing face of the aluminum plate are attached and assembled, mechanical combination of a copper-aluminum interface is achieved through single-pass large-rolling-reduction cold rolling, and a composite plate is obtained; and S5, the composite board is subjected to diffusion heat treatment, and the copper-aluminum composite board is prepared. According to the method, the copper-aluminum composite board with the high interface bonding strength can be manufactured through traditional equipment, and the method has the advantages of being low in production cost, simple in process and easy to industrially popularize.

According to the preparation method of the high-light-transmission anti-aging cesium tungsten bronze / double-rhenium synergistically-enhanced NIR shielding thin film, a cesium tungsten bronze-rhenium trioxide heterojunction is introduced into prepared NIR shielding powder on the basis of traditional cesium tungsten bronze, and the NIR shielding efficiency of the product thin film is enhanced. And meanwhile, the strength of the film is enhanced by doping a trace amount of elemental rhenium, so that the thickness of the prepared film is lower than that of a commercial NIR shielding film, and the light transmittance of the film is improved. The anti-aging performance of the film is also enhanced by doping the elemental rhenium, and the service life of the film is prolonged. Compared with a commercial NIR shielding film, the finished product film has higher light transmittance and higher NIR absorptivity, and the glass temperature rises to 47-54 DEG C after the film is irradiated for 60 minutes under a 250 W infrared lamp. And the NIR shielding performance of the film is not obviously reduced after 50 times of circulation under an extreme thermal shock experiment at 5-80 DEG C.

The invention belongs to the technical field of energy-saving materials, and discloses a thermal insulation coating energy-saving material, which is prepared from the following raw materials in parts by weight: 90 to 120 parts of waterborne resin, 10 to 25 parts of modified nano cesium tungsten bronze material, 5 to 20 parts of modified nano silicon dioxide, 1 to 10 parts of light stabilizer, 0.1 to 1 part of coupling agent, 0.5 to 3 parts of flatting agent, 5 to 10 parts of wetting dispersant and 0.05 to 0.1 part of defoaming agent. According to the heat-preservation heat-insulation coating energy-saving material disclosed by the invention, the water-based resin is used as a main film-forming material, the modified nano cesium tungsten bronze and the modified nano silicon dioxide are used as nano functional materials, and the light stabilizer is used as an auxiliary material; by utilizing the excellent visible light transmittance and near-infrared light shielding performance of the modified nano-scale cesium tungsten bronze and the high transmittance and infrared barrier performance of the modified nano-silica, the glass can ensure that the visible light transmittance of the glass is 76% or above, meanwhile, 97% or above of infrared light and ultraviolet light are isolated, and the glass has excellent heat insulation and cooling effects.

The disclosure provides a fine-grain tin-phosphor bronze alloy strip and a preparation method thereof. The fine-grain tin-phosphor bronze alloy strip comprises the following elements in percentage by mass: 4.0-10 wt % of Sn, 0.01-0.3 wt % of P and the balance of Cu and inevitable impurity elements, the average grain size of the tin-phosphor bronze alloy strip is 1-3 μm, the grain size is in normal distribution, and the standard deviation of the grain size is 0.9 μm or below; the proportion of the total low-ΣCSL grain boundary in the tin-phosphor bronze alloy strip in the whole grain boundary is 66-74%, and in the total low-ΣCSL grain boundary, the ratio range of (Σ9+Σ27) / Σ3 is 0.12-0.23:1. The fine-grain tin-phosphor bronze alloy strip of this disclosure enables a finished strip can have the tensile strength and the excellent bending performance at the same time.

The invention provides a high-thrust backing-up gas turbine sliding thrust bearing with a silver coating. The high-thrust backing-up gas turbine sliding thrust bearing comprises a shell, an oil supply isolating ring and tiles. An oil supply isolating ring is mounted on the shell; the tile blocks are mounted in the oil supply isolating ring; the tile block is provided with an inclined surface and can be rotationally adjusted around a fulcrum; the tile block pouring is made of lead bronze, and silver is plated on the surface of the lead bronze. The coating material of lead bronze and silver plating is adopted, the manufacturability of the coating material is improved, the working temperature of the sliding bearing is greatly increased, and the stability and firmness of the coating at the high temperature are guaranteed. The sliding bearing can realize forward and reverse rotation under the conditions of high temperature, high speed and large load, has very high stability and reliability, fills the blank of the design of the sliding bearing of the domestic high-power gas turbine capable of reversing, and provides a reference and a design thought for the design of the gas turbine with higher power in the future.

The invention provides an optical element six-degree-of-freedom adjusting and clamping device and an assembling method, and relates to the technical field of optical instruments. The device comprises a supporting base, a ball head adjusting screw, a cantilever spring mechanism and an elastic opposite ejection mechanism. The bottom of the support base is provided with a triangular layout through hole group. The center of gravity of the optical element is in the triangle. The cantilever spring mechanism and the ball head adjusting screw are combined to control Z-axis displacement and rotation around the X / Y axis, and the elastic opposite ejection mechanism and the ball head adjusting screw are combined to control X / Y-axis translation and rotation around the Z axis. All contact interfaces adopt a spherical surface-plane point contact design, and tungsten steel or phosphor bronze is selected as a material. According to the invention, six-degree-of-freedom independent precision adjustment of the optical element can be realized, the error of a clamping surface is as low as 0.068 mu rad, the structure is compact, and the adaptability is high.

The invention relates to a red copper thick plate and a preparation method thereof. The preparation method comprises the steps of smelting, casting, hot rolling, online quenching, cold rolling, finished product annealing, sampling detection, finished product sawing and packaging and warehousing. In the smelting process, Cu-La intermediate alloy is added, and the adding amount is 5-200 ppm; in the hot rolling process, the finish rolling temperature is controlled to be larger than or equal to 600 DEG C, rapid cooling is conducted after hot rolling, and online quenching solid solution is achieved; and when a finished product is annealed, the annealing temperature is controlled to be 200-450 DEG C, the time is 5-8 hours, and a protective atmosphere is adopted. According to the method, the problem of coarse grains of the soft red copper thick plate is solved, the fine and uniform soft red copper thick plate is obtained through a process test, and a good effect is achieved in application practice; the problem that the production difficulty of the products is large is solved, batch production can be achieved, and the industrial production target is achieved.

The invention relates to the technical field of wire drawing devices, and provides an environment-friendly wire drawing device and method.The environment-friendly wire drawing device for the copper conductor comprises a wire drawing rack, a feeding rack, a wire drawing assembly, a liquid supply assembly, a feeding assembly, a recycling assembly, a discharging rack, a guiding assembly and a drying assembly; the wire drawing assembly is installed in the wire drawing rack, the liquid supply assembly is installed in the wire drawing rack and located on the upper portion of the wire drawing assembly, the feeding assembly is installed on the lower portion of the wire drawing rack, the recycling assembly is installed on the feeding assembly, the discharging rack is installed at a discharging port of the wire drawing rack, and the guiding assemblies are installed on the feeding rack and the discharging rack correspondingly. By means of the technical scheme, the problems that in the wire drawing process in the prior art, due to the fact that wire drawing lubricating liquid is used repeatedly, the wire drawing lubricating liquid is polluted, and produced products are damaged and polluted are solved.

The invention relates to the technical field of metal processing, in particular to a phosphor bronze wire rolling mill device which comprises a bottom plate, machine bodies are arranged on the bottom plate, an upper roller and a lower roller which are vertically arranged in parallel are arranged between the machine bodies, and the upper roller is slidably arranged between the machine bodies through sliding plates on the two sides; the outer walls of the two studs are both sleeved with rotating wheels, and a belt is arranged between the two rotating wheels. The stand column is provided with a set of transmission adjusting assemblies arranged in a triangular mode. The air cooling mechanism is arranged on the bottom plate and corresponds to the discharging direction of the machine body; two traction rollers are arranged between the two supporting frames; and a speed change mechanism is arranged on the vertical plate. The rotating wheel rotates to drive the stud to move up and down, the position of the upper roller can be adjusted, the rolling machine can be suitable for producing wires of different diameters, the adaptability and flexibility of a production line are improved, the upper roller and the lower roller are each provided with a groove, and the precision of wire rolling and the product quality are ensured.

The invention relates to the technical field of wood manufacturing, in particular to a preparation method of a multifunctional phase-change transparent wood-based composite material, which comprises the following steps: delignification of wood through acidic sodium chlorite, modification with silica sol to obtain a porous template, dipping in a PEG / MMA / AIBN / acetone mixed solution, and hot press molding to obtain a phase-change transparent base material; and finally, coating a PDMS solution containing cesium tungsten bronze and strontium aluminate, and performing low-temperature drying twice to obtain the multifunctional composite material. Silica sol pretreatment is combined with a PEG / MMA impregnation and compression technology, the preparation process is simple and easy to implement, leakage of the phase change material can be effectively prevented, meanwhile, the stability and performance consistency of the composite material are improved, the material is suitable for large-scale production, meanwhile, cesium tungsten bronze and strontium aluminate are introduced, the material is endowed with hydrophobicity, light-emitting characteristics and heat shielding capacity, and the material is suitable for large-scale production. And the intelligent building has the functions of photo-thermal management, self-cleaning and decoration, so that diversified application requirements are met.

The invention provides a C0G type dielectric ceramic material as well as a preparation method and application thereof. The C0G type dielectric ceramic material is prepared from the following raw materials: 15 mol% to 16 mol% of BaCO3 and / or BaO, 5 mol% to 10 mol% of Nd2O3, 5 mol% to 10 mol% of Bi2O3, 55 mol% to 70 mol% of TiO2 and 0.1 mol% to 5 mol% of GeO2. The C0G type dielectric ceramic material has medium sintering temperature, high dielectric constant, low dielectric loss and high insulation resistance. Meanwhile, according to the method, the sintering temperature of the BLT system material with the tungsten bronze structure is effectively reduced under the condition that a traditional frit or a sintering aid is not added, and meanwhile the overall dielectric property of the ceramic material is optimized.

The invention relates to the technical field of automobiles, and provides a PVB composite film and a preparation method thereof, laminated glass and an automobile, the PVB composite film comprises a PVB base film and cesium-tungsten bronze composite particles distributed in the PVB base film, each cesium-tungsten bronze composite particle comprises an inner core and a shell layer coating the surface of the inner core, the inner core is made of cesium-tungsten bronze and titanium dioxide, and the shell layer is made of titanium dioxide. And the material of the shell layer comprises polyvinyl butyral. According to the PVB composite film provided by the invention, the material of the cesium-tungsten bronze composite particle shell layer is consistent with that of the PVB base film, so that the compatibility of the cesium-tungsten bronze composite particles and the PVB base film is remarkably improved, the distribution uniformity of the cesium-tungsten bronze composite particles in the PVB base film is favorably improved, and the heat insulation performance of the PVB composite film is greatly improved.

The invention relates to a device for removing an oxide layer on the surface of tin-phosphor bronze before hot rolling treatment, and belongs to the technical field of tin-phosphor bronze surface treatment.The device comprises a supporting structure used for supporting a grinding mechanism, and the supporting structure is provided with a chuck and a driving mechanism which are used in cooperation with the grinding mechanism; a knocking mechanism and a limiting plate which are used for treating tin-phosphor bronze are arranged on one side of the grinding mechanism, and a liquid conveying mechanism used in cooperation with the grinding mechanism is further arranged on the supporting structure. The knocking mechanism comprises a knocking block and a connecting frame arranged above the knocking block, and a mounting shaft for mounting the knocking block is fixed to the bottom side of the connecting frame. After the device for removing the surface oxide layer of the tin-phosphor bronze before hot rolling treatment is used in cooperation with a knocking function, the device for removing the surface oxide layer of the tin-phosphor bronze has remarkable advantages in the aspects of removal efficiency, surface quality, treatment stability, equipment service life, production efficiency and flexibility, environmental protection, energy conservation and the like.

A copper-aluminum dissimilar metal laser overlap welding method and system, a copper-aluminum dissimilar metal laser overlap welding system, including a fixture, a high-frequency current system, and a laser welding system; a copper-aluminum dissimilar metal laser overlap welding method, including the following steps: step 1, providing an aluminum plate and a copper plate to be welded, and using a fixture to form an upper and lower overlap joint with the aluminum plate to be welded and the copper plate to be welded; step 2, providing a high-frequency current system; step 3, providing a laser welding system; step 4, starting the high-frequency current system, and the high-frequency current system feeds high-frequency current to the aluminum plate to be welded and the copper plate to be welded respectively; step 5, starting the laser welding system, the laser welding system outputs a focused laser beam to irradiate the aluminum plate to be welded, and the laser welding system blows welding shielding gas to the welding area to implement high-frequency current assisted laser welding; step 6, moving the laser welding head to the end point, closing the high-frequency current system and the laser welding system, and completing the welding process.

The utility model relates to the technical field of cultural relic repairing, and discloses a bronze ware cultural relic repairing, cleaning and drying device which comprises a device shell, a rotating shaft is installed on the device shell, a plurality of assembly blocks are installed on the rotating shaft in an array mode, a mounting frame is fixed to one ends of the assembly blocks, a plurality of nozzles are installed on the mounting frame, and the nozzles are arranged on the mounting frame. The bottom end of the device shell is connected with a bottom frame, a circular hole is formed in the bottom frame, the rotating shaft is inserted into the circular hole, the bottom frame is provided with a two-way screw, the two-way screw is provided with a first moving block and a second moving block, the first moving block is provided with a limiting sleeve, and the second moving block is provided with a second moving block. According to the cleaning device for the bronze ware, the multiple nozzles are installed on the installation frame, the heating lamp is fixed to the other end of the assembly block, and after the bronze ware is cleaned, the heating lamp is started to conduct drying treatment on the bronze ware.

The invention discloses tin-lead bronze and a preparation method and application thereof.The tin-lead bronze comprises, by weight, 5%-11% of Sn, 2%-6% of Pb, 0.09%-4% of Ni, 0.05%-0.3% of P, 0.01%-1% of Zn and the balance Cu and inevitable impurities, the alloy structure of the tin-lead bronze comprises an alpha phase, an alpha + delta eutectoid and elemental Pb particles dispersed and distributed in the alpha phase, the area ratio of the alpha + delta eutectoid is smaller than or equal to 12%, and the area ratio of the elemental Pb particles is smaller than or equal to 10%. The as-cast average grain size of the tin-lead bronze is 20-70 microns, and the difference value delta D between the minimum grain size and the maximum grain size is smaller than or equal to 20 microns. Through improved design of alloy components and microstructures, a cast ingot with a specified structure is obtained by adopting a centrifugal casting process, meanwhile, the problem of dendritic segregation existing in a traditional casting method is solved, and the prepared material meets high requirements of special industries such as aerospace, ships and large engineering machinery.

The invention discloses an LTCC (Low Temperature Co-Fired Ceramic) green tape as well as a preparation method and application thereof, and the preparation method comprises the following steps: mixing LTCC formula powder and additive phase powder to obtain mixed powder; mixing the mixed powder, a dispersing agent and a solvent, and performing first ball milling treatment to obtain a first ball milling product; adding an adhesive and a plasticizer into the first ball-milling product, and carrying out second ball-milling treatment to obtain a second ball-milling product; filtering the second ball-milled product to obtain ceramic slurry for tape casting; drying the casting ceramic slurry to obtain an LTCC (Low Temperature Co-Fired Ceramic) green tape; wherein the weight ratio of the LTCC formula powder to the additive phase powder is (50-95): (5-50); the LTCC formula powder comprises ceramic powder and glass powder; the additive phase powder is at least one of hexagonal boron nitride, fluorophlogopite sheets, bismuthate-based tungsten bronze and phosphate glass. According to the LTCC green tape prepared by the preparation method disclosed by the invention, the technical problem that the machinability and the thermal conductivity of an LTCC green substrate prepared by an existing LTCC green tape are relatively poor can be solved.

Disclosed in the present application are a preparation method for a bronze-process Nb3Sn superconducting wire, and a superconducting wire. The preparation method comprises: placing a bronze rod into an Nb tube, placing the Nb tube into a bronze tube, and performing rotary swaging, drawing and annealing to prepare a bronze / Nb single core rod; bundling up hundreds of bronze / Nb single core rods in a hexagonal close-packed manner and then coating same with a barrier layer, and then placing the bronze / Nb single core rods into a copper tube to form a final billet; and heating the final billet and then sequentially performing extruding, drawing and intermediate annealing thereon, so as to obtain a bronze-process Nb3Sn superconducting wire having ring-shaped core filaments. By means of the present application, an Nb core filament changes from a solid columnar shape to a hollow tubular shape, thereby increasing the interaction area between Nb and a bronze matrix, increasing the reaction rate of Nb with Sn in the bronze matrix during a phase-formation heat treatment, and shortening the reaction time.

The invention relates to the technical field of PVB heat-insulating films, in particular to a PVB heat-insulating film based on indium tin oxide and bronze cesium tungsten compounding and a preparation method thereof.The PVB heat-insulating film is prepared from, by weight, 80-120 parts of PVB resin, 20-50 parts of oily plasticizer, 0.1-2.0 parts of silane coupling agent, 0.1-1.0 part of antioxidant, 0.1-1.0 part of ultraviolet light absorber, 1-5 parts of polyethylene glycol derivative and 1-5 parts of compound dispersion slurry, the weight ratio of the indium tin oxide powder to the bronze cesium tungsten powder in the compound dispersed slurry is (5: 5)-(7: 3). According to the PVB heat-insulating film based on indium tin oxide and cesium tungsten bronze compounding and the preparation method, the prepared PVB heat-insulating film has high visible light transmittance and excellent near-infrared light rejection rate, meanwhile, the Faraday cage effect can be effectively avoided, and the signal shielding problem is avoided.

The invention provides a high-strength and high-plasticity titanium bronze alloy and a preparation method thereof, and relates to the technical field of alloys. The preparation method comprises the following steps: smelting and casting prepared raw materials in sequence to obtain a cast ingot; and the cast ingot is sequentially subjected to hot rolling, solution treatment, electric pulse treatment and aging treatment, and the high-strength and high-plasticity titanium bronze alloy is obtained. Cr is added into the titanium bronze alloy, Cr and Ti form a TiCr phase, the strength and conductivity of the alloy are improved, the nucleation of a metastable state strengthening phase is effectively promoted by adopting an electric pulse induced precipitation and aging treatment method, so that the strengthening phase density of the titanium bronze alloy in the aging process is improved, the size distribution of the metastable state strengthening phase is improved, and the strength and conductivity of the titanium bronze alloy are improved. And the formation of a discontinuous precipitated phase is inhibited. The comprehensive performance of the titanium bronze alloy can be greatly improved, the obtained titanium bronze alloy has high strength and high plasticity, and the tensile strength and the elongation can reach 782-889 MPa and 17-35%.

The invention relates to the technical field of remanufacturing, in particular to a beryllium bronze piston part inner wall damage repairing method which comprises the following specific steps: S1, defect inspection; s2, preparing an electrode bar; s3, electric spark coating repair is carried out; s4, remelting by a cold welding machine; s5, heat treatment; s6, honing an inner hole; s7, repairing and verifying; according to the method, a method of electric spark coating repairing and cold welding composite repairing is adopted, the problem that an electric spark coating repairing layer is not compact is solved, the problem that wire feeding is difficult in the cold welding inner hole repairing process is solved, the problem that an overlong electrode bar rotating at a high speed shakes in the electric spark coating repairing process is solved by adopting the specially-made electrode bar, and the welding quality is improved. The metallographic phase of the repair layer does not have cracks and incomplete fusion defects, the repair layer is metallurgically bonded with the substrate, and the hardness of the repair layer reaches more than 90% of that of the substrate of the plate.

The invention discloses a method for predicting the tin-phosphor bronze annealing rate of an air cushion furnace, and belongs to the field of metallurgy. According to the method, the tin-phosphor bronze to be annealed is rolled and then placed in a muffle furnace for simulated annealing treatment, then parameters obtained through simulation are calculated, and the annealing rate needed when the tin-phosphor bronze of the batch is subjected to annealing treatment in an air cushion furnace can be obtained. The tin-phosphor bronze subjected to annealing treatment in the air cushion furnace by using the prediction result can achieve expected hardness, and the production energy consumption and the raw material cost are remarkably reduced.

The invention belongs to the technical field of copper alloy preparation, and relates to a preparation method of a titanium bronze alloy wire, raw materials comprise the following elements in percentage by mass: 1.75-2.25 wt% of Ti, 0.4-0.6 wt% of Cr and the balance of copper; comprising the following steps: S1, preparing materials; s2, vacuum casting; s3, forging; s4, hot extrusion; s5, drawing is conducted; s6, solid solution treatment; s7, cold wire drawing; and S8, annealing. The titanium bronze alloy wire which is good in strength and plasticity, high in dimensional precision, smooth and uniform in appearance, stable in mechanical property and capable of meeting the requirements of wires for copper alloy welding forming is prepared, the preparation method is simple and suitable for large-scale industrial production, and the production cost is reduced.

A brazed joint that can suppress the decrease in joint strength even when brass (50, 60) containing bismuth instead of lead and stainless steel (10) are joined by brazing with a solder material, and a method for producing the brazed joint are provided.A brazed joint made of stainless steel (10) and brass (50, 60), provided with a layered structure in which stainless steel (10), a first brazing material layer (20), a barrier layer (30), a second brazing material layer (40) and brass (50, 60) are arranged successively in layers, wherein the barrier layer (30) is a layer that blocks the transfer of bismuth in the brass (50, 60) to the first brazing material layer (20) by brazing the stainless steel (10) and the brass (50, 60), wherein the barrier layer (30) contains at least either a brass (50, 60) or a phosphor bronze, and a brazing material from which the first brazing material layer (20) and the second brazing material layer (40) consist is liquid at 680 to 800°C.

To provide a brazed joint which can inhibit reduction of joint strength even when a brass which contains bismuth in place of lead and stainless steel are brazed with a brazing material, and to provide a manufacturing method of the brazed joint.SOLUTION: A brazed joint of stainless steel and a brass includes a layer structure in which the stainless steel, a first brazing material layer, a barrier layer, a second brazing material layer, and the brass are sequentially arranged in a laminar manner. The barrier layer blocks bismuth in the brass from being moved to the first brazing material layer by brazing the stainless steel and the brass to each other. The barrier layer is at least one of brass and phosphor bronze. A brazing material forming the first brazing material layer and the second brazing material layer is a liquid at a temperature ranging from 680 to 800°C.SELECTED DRAWING: Figure 1

The invention discloses a high-strength and high-conductivity iron bronze alloy as well as a preparation method and application thereof. The iron bronze alloy comprises the following components in percentage by mass: 2.1-2.4 wt% of Fe, 0.015-0.1 wt% of P, 0.05-0.15 wt% of Zn, less than or equal to 0.1 wt% of impurities and the balance of Cu, the structure of the iron bronze alloy comprises a matrix phase and a second phase, the second phase comprises particle-shaped Fe3P phases and fibrous Fe-rich phases, the size of the particle-shaped Fe3P phases is 100-150 nm, the diameter of the fibrous Fe-rich phases is smaller than 2 micrometers, and the distance between the fibrous Fe-rich phases is smaller than 10 micrometers. The tensile strength of the iron bronze alloy is 600 MPa or above, the electric conductivity is 70% IACS or above, and the iron bronze alloy has wide application prospects in preparation of vehicle gauge grade IGBT contact pins.

The invention belongs to the technical field of powder metallurgy, and particularly discloses a nanocrystal potassium-doped tungsten material and a preparation method thereof.The preparation method comprises the following steps that ammonium paratungstate is put into spray granulation equipment, then a dopant aqueous solution is added, mixing and drying are conducted, potassium-doped APT is obtained, pre-reduction is conducted through a converter, ammonium tungsten bronze is obtained, and the nanocrystal potassium-doped tungsten bronze is obtained; the method comprises the following steps: carrying out one-step reduction on ammonium tungsten bronze through a fifteen-tube furnace to prepare potassium-doped D powder, carrying out two-step reduction on the ammonium tungsten bronze through the fifteen-tube furnace to prepare potassium-doped B powder, then cleaning with hydrochloric acid and hydrofluoric acid, cleaning with water, filtering, dewatering, drying, crushing and sieving to obtain washed potassium-doped D powder and washed potassium-doped B powder, mixing the washed potassium-doped D powder and washed potassium-doped B powder to obtain mixed powder, and sintering the mixed powder to obtain the potassium-doped B powder. And carrying out isostatic pressing treatment to obtain a tungsten green body, and sintering the tungsten green body in a medium-frequency induction sintering furnace to obtain the tungsten ceramic. The nanocrystal potassium-doped tungsten material has the advantages of high strength, good plasticity, stable high-temperature performance and the like, and a product processed by the nanocrystal potassium-doped tungsten material is long in service life.

The invention provides surface modified rare earth doped cesium-tungsten bronze and application thereof in preparation of multicolor light absorption fibers, the structural formula of the surface modified rare earth doped cesium-tungsten bronze is LaxCsyWO3 (at) CMC, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 3x + y < lt >; and 0.33. By adjusting the doping ratio of the double metals in the LaxCsyWO3-coated CMC, the color change from green, blue, dark blue to purple can be realized at the fiber raw material end, and the requirements of consumers on personalized and fashionable products are met. The characteristic breaks through the limitation of the traditional tungsten bronze fiber in color, and provides wider application possibility.