936 results about "Bimetal" patented technology

The invention discloses a composite electrode material for removing uranium through photoelectrocatalysis and a preparation method and application of the composite electrode material, and belongs to the technical field of catalytic materials and wastewater treatment.The preparation method of the composite electrode material comprises the following steps that a ZIF-8 material, copper salt and ferric salt are mixed, and a first metal composite material is prepared; reacting the first metal composite material with a KOH solution to prepare a second metal composite material; carrying out carbonization treatment on the second metal composite material, and then carrying out acid treatment by using acid to obtain a bimetallic atom catalytic material; the preparation method comprises the following steps: dispersing a bimetallic atom catalytic material and a g-C3N4 material in a mixed solution containing phytic acid and a Nafion solution to obtain catalyst ink; and coating the catalyst ink on a substrate, and carrying out illumination drying to obtain the composite electrode material. According to the composite electrode material, under the synergistic effect of the bimetallic single atomic cluster catalyst and g-C3N4, respective advantages are fully exerted, and efficient deposition removal of uranium is achieved.

The invention relates to a method for preparing bimetallic core-shell structure composite powder based on an acoustic resonance technology, and belongs to the technical field of powder metallurgy. Adding the micron matrix metal powder and the nano coating layer metal powder into a mixing tank, replacing air in the mixing tank with protective gas or active gas, and setting the pressure of the gas in the tank and the temperature of the tank body; and then three-section acoustic resonance coating powder preparation is carried out, and the bimetal core-shell structure composite powder is obtained. According to the method, different metal powder is driven by acoustic resonance to do violent disordered movement, the outer layer of micron metal powder is evenly and tightly coated with nano metal powder under the combined action of electrostatic force and other physical force, and finally the core-shell structure bimetal coated powder is obtained. The method is simple, the preparation efficiency is high, the applicability is wide, the thickness adjustable range of the coating layer of the obtained bimetallic coated powder is wide, the obtained bimetallic coated powder is uniform and compact, the powder particle morphology can be effectively maintained, and pollution of other elements is avoided.

The invention provides a gradient metal additive manufacturing method based on cross-scale collaborative interface strengthening. The implementation object of the additive manufacturing method is a heterogeneous interlayer interface of a gradient metal structure, corresponding cross-scale cooperative strengthening is jointly achieved based on bimetal macroscopic interface tooth-shaped meshing strengthening and microcosmic interface atom interaction diffusion strengthening, and the additive manufacturing method has the advantages of being high in reliability, wide in application system and convenient and fast to regulate and control. According to the specific means, a child-mother meshing structure is arranged on the two sides of the bimetallic interface for macroscopic strengthening, an atomic interaction diffusion layer with the specific thickness is formed on the bimetallic interface for microcosmic strengthening in combination with an additive process design, and therefore the macro-micro cross-scale cooperative strengthening effect of the heterogeneous interface is achieved. Based on the method, the heterogeneous metal structure interface can be effectively strengthened, the weak mechanical property area of the interface is eliminated, the method is particularly suitable for parts with severe and complex service loads, and the service life is prolonged.

The bimetallic welding method comprises the steps that a plurality of annular grooves are formed in the surface, welded to a copper plate, of a steel base body, and a plurality of annular protrusions are formed on the surface of the steel base body; the steel substrate is placed on the lower electrode, and the copper plate is placed on the annular protrusion on the surface of the steel substrate; an upper electrode is placed on the copper plate, and set pressure is applied to the upper electrode; after the set pressure is reached, electrifying the upper electrode, and heating the annular bulge on the surface of the steel substrate to a molten or plastic state according to the generated resistance heat, so that the annular bulge is combined with the copper plate to finish welding; according to the double-metal welding method, the high-pressure energy storage welding process is used for replacing an original silver welding process using precious metal such as silver, and the cost is greatly reduced. Brass is used for welding, the welding method can be applied to the working condition higher than 400 bar, the abrasion resistance is high, and the product performance is improved.

The invention discloses double-metal composite pipe machining equipment and a method for machining a double-metal composite pipe. The double-metal composite pipe machining equipment comprises a supporting table, a machining table and a machining table, the sliding assembly is arranged on the supporting table and comprises a first sliding rail and a second sliding rail; the drilling device is arranged on the sliding assembly and used for drilling the pre-sleeved blank; the riveting device is arranged on the sliding assembly and used for riveting the inner base pipe and the outer covering pipe which are pre-sleeved with the blank; the clamping and feeding device is used for clamping the pre-sleeved blank and driving the pre-sleeved blank to move and rotate; and the pipe rolling unit is arranged on the supporting table and used for rolling the pre-sleeved blank to form the bimetal composite pipe. When the device is applied, the inner base pipe and the outer covering pipe do not need to be welded, but the inner base pipe and the outer covering pipe are riveted and fixed, so that the inner base pipe and the outer covering pipe are prevented from being staggered in the rolling and compounding process.

The present invention belongs to the technical field of thermal relay production, and specifically discloses an assembly device for thermal relays. The assembly device for thermal relays provided by the present invention comprises a thermal element transplanting device that realizes automatic assembly of the thermal element in the bottom shell, a clamping jaw assembly that clamps the first side and the second side of the bimetallic material, and a first positioning portion on the clamping jaw assembly that positions the first end of the bracket, thereby simultaneously clamping and positioning the bimetallic material and the bracket, and a second positioning portion that positions the conductive rod, thereby simultaneously clamping and positioning the bimetallic material and the conductive rod, thereby ensuring that the thermal element can be stably transported and installed; a thermal element position detection device that detects the position of the thermal element after the bottom shell is installed, and after the detection assembly abuts against the thermal element in the bottom shell, the position detection assembly can obtain the position of the detection assembly in the first direction, thereby determining whether the installation position of the thermal element in the bottom shell meets the installation requirements, with high detection accuracy and consistent detection of the product.

The invention belongs to the technical field of composite material casting, and relates to an aluminum / iron bimetal composite material based on a micro-textured intermediate layer and a preparation method thereof.The micro-textured intermediate layer is pre-arranged on the surface of an iron base material in advance in an electro-deposition and laser etching composite mode, and in the liquid-solid composite casting process, the micro-textured intermediate layer is pre-arranged on the surface of the iron base material in advance; the middle layer plays a role in isolating direct contact between the liquid aluminum alloy melt and the solid iron base material, and the microstructure on the surface of the middle layer plays a role in inducing stress coordinated distribution. The problem that the interface is easy to crack can be effectively solved through dual control of the interface phase composition and the interface structure of the aluminum / iron double-metal composite material, so that the interface bonding strength of the aluminum / iron double-metal composite material is stably improved.

The invention relates to the field of bimetal composite materials, in particular to a method for researching the influence of an intermediate layer on bimetal interface assembly and performance, which comprises the following steps: electrochemically depositing a FeCoNiCr-M high-entropy alloy coating; a micro-textured high-entropy alloy coating is constructed in a laser controllable manner; according to Al / HEA / Fe composite material liquid-solid forming process optimization and structure property characterization, the Al / HEA / Fe composite material liquid-solid forming process optimization and structure property characterization method has the following beneficial effects that according to the requirement for Al / Fe bimetal high interface bonding strength, the microtextured high-entropy alloy coating is prepared through the electrochemical and femtosecond laser composite technology, the microtextured high-entropy alloy coating serves as a middle layer between a solid steel matrix and a liquid aluminum alloy melt, and the high-strength Al / HEA / Fe composite material is obtained; the Al / HEA / Fe composite material is obtained through a liquid-solid forming technology, and the Al / HEA / Fe composite material is obtained through high-entropy alloy component / content optimization, coating surface structure design, technological parameter regulation and control and the like on the basis of thermal and dynamic calculation and experimental data analysis. And research on the aspects of a high-entropy alloy coating solid solution phase forming mechanism, a composite material interface structure evolution rule, an interface strengthening mechanism and the like is carried out.

The invention discloses a high-strength copper-steel double-metal composite material and a preparation method of the high-strength copper-steel double-metal composite material. Copper and steel base materials for preparing the high-strength copper and steel double-metal composite material are selected; the copper base material and the steel base material are welded through the electron beam additive manufacturing technology; scanning a welding seam of the copper-steel bimetallic composite material by using an ultrasonic detection system; analyzing and processing the scanned image through a computer; carrying out secondary treatment on the copper-steel double-metal composite material by adopting a rolling compounding method; carrying out quenching treatment on the copper-steel double-metal composite material; inspecting the performance of the high-strength copper-steel bimetallic composite material; and storing the prepared data to a cloud end through a computer. According to the method, the electron beam additive manufacturing technology and the rolling composite method are combined, the strength of the copper-steel composite material can be improved in the preparation process, the composite material is detected through an ultrasonic detection system, the percent of pass of the composite material can be screened, and the performance of the composite material can be further enhanced through annealing treatment.

The application discloses a bimetallic optical fiber SPR sensor based on silver core-gold shell nanoparticles, comprising: an optical fiber, the outer surface of which is provided with a sensing area; and the metal functional layer is arranged on the sensing area, the metal functional layer comprises dispersedly stacked silver nanoparticles, and the outer surfaces of the silver nanoparticles are coated with gold films. The metal functional layer of the sensor is composed of the metal nanoparticles, and compared with a traditional metal film SPR sensor, the specific surface area and porosity of metal are remarkably improved, and the detection sensitivity of the SPR sensor can be improved; silver nanoparticles are adopted as a main metal material, SPR sensing is greatly promoted, the silver nanoparticles are coated with a gold film to form isolated bimetal nanoparticles, the chemical stability of the silver nanoparticles is improved, the sensor is endowed with common characteristics of gold and silver, and the detection performance is remarkably improved.

The invention relates to the technical field of dissimilar metal connection, in particular to a copper-steel bimetal piece with a complex inner runner and a preparation method thereof.The preparation method comprises the steps that a cooling runner is preprocessed through a copper alloy blank, and a primary copper alloy workpiece is obtained; the primary copper alloy part is cleaned, and a secondary copper alloy part is obtained; the stainless steel blank is subjected to surface treatment and cleaning, and a stainless steel workpiece is obtained; the secondary copper alloy workpiece and the stainless steel workpiece are assembled and then are arranged in a sheath; the sheath is heated and vacuumized and then is sealed and welded; carrying out hot isostatic pressing treatment on the sealed and welded sheath to obtain an intermediate part; and the steel ladle sleeve outside the middle part is removed, and the copper-steel bimetal part is obtained. According to the method, the phenomena of generation of brittle intermetallic compounds on the interface and grain coarsening are avoided, the connection strength is remarkably improved, interface metallurgical bonding and high-precision shape control of a cooling runner are synchronously completed in a single process, and the geometric precision of the copper-steel bimetal part is guaranteed.

The invention belongs to the technical field of bimetallic composite materials, and provides a copper-aluminum bimetallic composite material and a preparation method thereof. The method comprises the following steps: coating an aluminum material with a copper strip, sealing through continuous electron beam welding, carrying out continuous equal channel angular extrusion on the copper-aluminum bimetallic material, carrying out heat treatment on the deformed copper-aluminum bimetallic material, and then carrying out extended extrusion or drawing to obtain the copper-aluminum bimetallic composite material. Aluminum is used for replacing part of copper, the overall weight of the material is reduced on the premise that the high conductivity of pure copper is kept, copper resources are saved, and the production cost is reduced. After ECAP extrusion, the strength performance of the material is improved by 3-5 times; after heat treatment, work hardening disappears, and subsequent machining treatment is facilitated; after expansion extrusion, the copper-aluminum bimetallic material is processed into a copper-aluminum bimetallic bar; and after further rolling and drawing, a bimetal plate or an ultra-fine grain wire is formed, and the material is restrained by a roller and a die hole to form an accurate size and a smooth surface.

According to the production method of the hot-rolled copper-steel double-metal composite plate, copper is oxygen-free copper, and Cu is larger than or equal to 99.95%; the steel is low-alloy high-strength steel; the key process steps of the copper-steel composite plate comprise assembling, heating, rolling, cooling and finishing. By controlling the rolling temperature, the pass reduction rate, the cooling speed and other processes, the plate shape of the copper-steel rolled composite plate is obviously improved, the stability of the bonding surface is greatly improved, and therefore industrial production and application of the copper-steel bimetal rolled composite plate are achieved.

The invention discloses a bimetallic Ag and Pd loaded WO3 material and a preparation method thereof, and relates to the technical field of sensor material preparation, and the preparation method comprises the following steps: 1, dissolving a tungsten source in an ethanol solution, mixing, hydrolyzing, aging, precipitating, washing, drying, calcining and cooling; 2, adding deionized water, adding a silver source solution and a palladium source, adding ascorbic acid, and stirring; 3, centrifuging, washing with ethanol and deionized water, and drying; 4, selecting a gold interdigital electrode with aluminum oxide ceramic as a substrate as a base electrode material, dipping the WO3 nano-particle dispersion liquid by using a line drawing pen, and uniformly coating the WO3 nano-particle dispersion liquid on the surface of the interdigital electrode; and 5, electrode drying and heat treatment. The efficient gas sensing material is prepared through the preparation method which is easy to operate, environmentally friendly and economical, and the gas sensing material has the advantages of being high in sensitivity, rapid in response, good in selectivity and the like at the low working temperature.

The invention discloses a production process of a novel copper-based alloy bimetallic synthesis material, and relates to the field of alloy materials.The production process comprises the steps that a copper-nickel alloy is selected as a base material, a titanium alloy is selected as a functional layer, and stress distribution of a bonding layer is designed and optimized through gradient component distribution; preparing a copper-nickel alloy liquid by utilizing vacuum induction melting, supporting and fixing a core rod through three points, and controlling temperature and flow velocity for pouring to form co-growth crystals; the surface of the base material is cleaned through a sand blasting process, a Cu-Ti nano coating is coated through a PVD technology, and a nanoscale convex-concave structure is formed; building a mathematical model of a temperature field and a component diffusion field, and optimizing and combining area temperature distribution and diffusion behaviors through simulation analysis; through gradient temperature control annealing treatment, residual stress is eliminated, and diffusion is promoted; the bonding performance is evaluated by combining shear strength and microhardness tests; and dividing the production process based on the modular design. The method can be widely applied to the industrial fields with high-temperature, high-strength and corrosion-resistant requirements.

The invention belongs to the technical field of coating material preparation, and particularly relates to a copper-titanium co-doped amorphous carbon coating and a high-throughput preparation method. The invention firstly provides a high-throughput preparation method, the method does not need to prepare a plurality of target materials with different metal contents, a plurality of deposition samples can be obtained only by preparing a plurality of matrixes once through ingenious arrangement of matrix sample positions and specific quality control index requirements, and then test screening is carried out in combination with the quality control index requirements. And the bimetallic-doped amorphous carbon coating with the optimal performance can be rapidly screened out with relatively low process cost for practical application.

The invention discloses a preparation method of a vibration and noise reduction bimetal composite pipe, relates to the field of metal pipe processing, and aims to solve the problem of poor vibration and noise reduction performance of a traditional composite pipe. The preparation method comprises the steps that a composite pipe blank is provided and sequentially comprises a titanium alloy pipe and a stainless steel pipe from outside to inside, the titanium alloy pipe and the stainless steel pipe are fixed through a base, and an annular columnar filling cavity is defined by the titanium alloy pipe, the stainless steel pipe and the base; the filling cavity is filled with metal particle materials, the metal particle materials are compacted through a pressing block, and the open end of the filling cavity is sealed and welded through a cover plate; hot rolling is conducted on the composite pipe blank, and a first composite pipe blank sequentially comprising a titanium alloy layer, a porous metal layer and a stainless steel layer from outside to inside is obtained; and cutting off the pipe section of the base and the cover plate to obtain the composite pipe. And the porous metal layer formed by the metal particle material has good energy absorption performance and excellent sound insulation and heat insulation performance, so that the prepared bimetal composite pipe finally achieves the purposes of vibration and noise reduction.

The invention discloses a bimetal composite pipe end welding device and method, and relates to the technical field of welding, the bimetal composite pipe end welding device and method comprise a base, a fixing plate and a welding mechanism, the fixing plate is arranged on the top of the base, the welding mechanism is arranged on the inner side of the fixing plate, and the welding mechanism is arranged on the inner side of the fixing plate. The welding mechanism comprises a first motor, cutting machines, a spring telescopic rod, a second welding machine mechanism and a protective barrel plug, the first motor is used for driving the cutting machines to conduct position adjustment according to the size of an actually-welded pipeline, and after the multiple cutting machines cut the outer layer of a section of double-layer pipeline, the argon arc welding machine mechanism on the mounting ring is driven to surround the outer side of the pipeline; the outer layer welding is completed according to the inner layer welding principle, overall welding of the bimetal composite pipe is achieved, the problems of weld cracks and air holes caused by traditional bimetal composite pipe welding are avoided, the welding quality is improved, the production cost is reduced, and the working time is shortened.

The present invention provides a detection device for the bonding strength of bimetallic sheets, which comprises: an intermediate ball die holder, a specimen clamping assembly, and a cutting tool. The intermediate ball die holder includes an upper template and a lower template arranged horizontally. The upper template and the lower template are movably connected through a movable connecting member, and the upper template can move up and down relatively. A positioning and fixing block is arranged on the upper end surface of the lower template, and the specimen clamping assembly is installed on the positioning and fixing block. The specimen clamping assembly is used for clamping the specimen. A cutting tool fixing block is arranged on the lower end surface of the upper template, and the cutting tool is installed on the cutting tool fixing block. The cutting tool is used for shearing the specimen. Taking the bimetallic material of steel back and copper alloy as an example, this detection device is applicable to detecting the bonding strength of bimetallic materials with a steel back layer thickness ≥ 2 mm and a copper alloy layer thickness ≥ 0.5 mm. The operation is simple, the influence of other external interference factors is reduced, the repeatability of the test results is good, and the measured data is more accurate and reliable.

The utility model relates to the technical field of saw blade repairing, and discloses a bimetallic strip saw blade tooth blade repairing device which comprises a fixing frame, a transverse electric sliding rail is fixedly arranged at the top of the fixing frame, a transverse electric sliding block is arranged in the transverse electric sliding rail, and an air cylinder is fixedly arranged at the bottom of the transverse electric sliding block. An oil storage tank is fixedly mounted at the tail end of a piston rod of the air cylinder, a grinding rod is fixedly arranged at the bottom of the oil storage tank, an oil separation plate is fixedly arranged in the oil storage tank, an oil discharge pipe is fixedly arranged at the bottom of the oil separation plate, an electromagnetic valve is arranged on the pipe wall of the oil discharge pipe, and an oil discharge port is formed in the bottom of the oil storage tank and located on one side of the grinding rod; a longitudinal electric sliding rail is fixedly arranged at the bottom of the fixing frame. According to the double-metal band saw blade repairing device, the double-metal band saw blade can be automatically polished, the repairing efficiency is improved, meanwhile, cutting oil can be automatically added, the tooth edge of the saw blade is effectively prevented from being abraded, and the repairing quality is improved.

The invention belongs to the technical field of bimetal part manufacturing, and particularly relates to a method for preparing aluminum-magnesium bimetal through a pulse electromagnetic composite field and a bimetal product, and the method comprises the following steps that a casting foam model is prepared according to the preset form of a workpiece, and a solid aluminum inlay and the casting foam model are assembled to form a composite model. And embedding the composite model into a sand box. During pouring, a pulsed magnetic field and a pulsed electric field are applied to the composite model in a vacuum environment. And cooling to obtain the aluminum-magnesium bimetal product. The invention further discloses the aluminum-magnesium bimetallic product prepared through the method. The method is suitable for manufacturing aluminum-magnesium bimetal castings with complex shapes, the process is simple, the bimetal interface is easy to control, the bimetal bonding performance is good, the alloy strengthening effect is good, grain refinement is effectively achieved, interface defects are overcome, and the method is suitable for producing various related parts in the fields of automobiles, spaceflight and the like.

A conduit coupling assembly for joining together two metal conduits includes a first fitting having a first end opposite a second end, wherein the first end is threadably attached to the conduit, and a first washer attached to the second end of the first fitting, wherein the first washer is non-metallic. The coupling may further include a second fitting in abutment with the first washer, a nut surrounding the first fitting and the second fitting, and a second washer disposed between the nut and the second fitting, wherein the second washer is non-metallic.

The invention relates to the field of insulating materials, in particular to a preparation method of a ceramic insulator, which comprises the following steps: ball-milling cryolite, kaolin, quartzite, thiourea intercalation layered bimetallic oxide, glass powder, sodium tungstate, ferrous sulfate and deionized water, uniformly mixing, adding a binder, uniformly stirring to obtain glaze, applying the glaze to a ceramic matrix to obtain a rough blank, and sintering to obtain the ceramic insulator. And drying the rough blank, putting the rough blank into a muffle furnace, heating to 1100-1200 DEG C, and sintering for 1-5h. The ceramic insulator prepared by the invention has excellent photocatalytic self-cleaning performance and anti-pollution flashover performance, can ensure safe and stable operation of a power transmission line, and reduces the maintenance cost of line operation.

The invention relates to the field of gas sensing, and discloses a two-dimensional Cu-TCPP modified bimetallic MOF composite material and a preparation method and application thereof, a gas sensor and a preparation method and application thereof, the two-dimensional Cu-TCPP modified bimetallic MOF composite material comprises a Zn / Co-MOF material, and the surface of the Zn / Co-MOF material is modified with a Cu-TCPP nanosheet. According to the two-dimensional Cu-TCPP modified bimetallic MOF composite material, the characteristics of large surface area and high electron transmission efficiency of a two-dimensional material and the characteristics of porosity, high specific surface area, chemical tunability and the like of an MOF material are fused, and the catalytic activity of the material is enhanced through introduction of Cu-TCPP, so that the detection sensitivity of target gas is improved; resistance change detection of gas molecules is realized, and the gas molecules are converted into electric signals to be output and used for monitoring characteristic gas of dissolved gas in transformer oil.

The invention relates to the technical field of photocatalysis, in particular to a Ni / Ga bimetal doped g-C3N4 nanotube composite material as well as a preparation method and application thereof. The Ni / Ga bimetal doped g-C3N4 nanotube composite material with the nitrogen vacancy is formed by doping Ni and Ga bimetals into the g-C3N4 nanotube and calcining the g-C3N4 nanotube in the air atmosphere to introduce the nitrogen vacancy. Nitrogen vacancies and double metal doping synergistically improve the efficiency of photocatalytic hydrogen production, because the Ni / Ga double metal doped g-C3N4 nanotube composite material with the nitrogen vacancies has a wider visible light absorption range, a lower carrier recombination rate, a higher electron transfer rate and higher stability, the composite material further has higher hydrogen production efficiency.

The invention discloses a bimetal composite plate with an X90-grade composite layer made of nickel base alloy Inconel625 and a manufacturing method of the bimetal composite plate. The bimetal composite plate comprises the following chemical components in percentage by weight: base material components including C, Si, Mn, Cr, Ni, Mo, Cu, Nb, V, less than or equal to 0.05% of Al, Ti and the balance of Fe and inevitable impurity elements; the composite material comprises the following components: less than or equal to 0.08% of C, less than or equal to 0.5% of Si, less than or equal to 0.5% of Mn, 20.0-23.0% of Cr, 8.0-10.0% of Mo, 3.15-4.15% of Nb, less than or equal to 5.0% of Fe, less than or equal to 0.05% of Al, less than or equal to 0.05% of Ti and the balance of Ni and inevitable impurity elements. According to the invention, the components are comprehensively optimized, and proper rolling and tempering processes are matched to obtain the bimetal composite plate with yield strength not lower than X90 and excellent corrosion resistance for the oil and gas transmission line pipe.

The invention discloses an inorganic normal-temperature rapid-hardening coal-rock mass reinforcing and filling material, and relates to the technical field of mine reinforcement. The material comprises a liquid A and a liquid B, the liquid A is prepared from cement, fly ash, magnetic nano silicon dioxide, citric acid and a layered bimetal oxide-sodium hexametaphosphate compound; and the liquid B comprises water glass, superfine limestone and water. During use, the liquid A and the liquid B are mixed according to the volume ratio of 1: 1 and injected into a target area, and a 1.5 Tesla magnetic field is applied at the initial stage of grouting until the grout is initially set. Through the synergistic effect of the compound protection dispersing agent, the magnetic particles and an external magnetic field, the technical problems that an existing material is unstable in performance due to temperature change, nanoparticles are prone to agglomeration, and magnetic response is attenuated in an alkaline environment are effectively solved; the technical effects of rapid solidification, high strength and excellent durability in high-temperature, low-temperature and complex mine environments are achieved.

The invention discloses a preparation method of an iron-manganese bimetallic catalytic material by using copper slag. The preparation method comprises two steps of pretreating the copper slag and preparing the iron-manganese bimetallic catalytic material. The iron-manganese bimetallic catalytic material prepared by the method belongs to a porous material, is rich in pores and large in specific surface area, is rich in Fe < 3 + >, Mn < 3 + >, Mn < 4 + > and other active sites on the surface, has the advantages of high catalytic activity, good stability and environmental friendliness, and realizes reduction and high-value utilization of the copper slag. In addition, the prepared iron-manganese bimetallic catalytic material can be used for catalyzing persulfate to form an advanced oxidation system, and is suitable for degradation treatment of organic wastewater such as printing and dyeing wastewater, pharmaceutical wastewater, food wastewater and raffinate.

The invention provides a casting method of a copper-steel double-metal cylinder body, and belongs to the technical field of pump body part machining, the casting method comprises the following steps: pre-treating a steel substrate and a copper alloy, and then heating and preserving heat together; cooling is conducted, cooling is conducted in four stages, the blowing direction of the first stage cooling, the blowing direction of the third stage cooling and the blowing direction of the fourth stage cooling are all from bottom to top, the blowing direction of the second stage cooling is from top to bottom, and solidification of the molten copper is completed after the third stage cooling; and after cooling is completed, tempering treatment is conducted, and the copper-steel double-alloy cylinder body is obtained. In the cylinder body casting process, the heated cylinder body is subjected to multi-stage cooling, the gas blowing directions of different cooling stages are controlled, rapid solidification of molten copper can be achieved, the situation that the molten copper fluctuates is avoided, the solidification defect is effectively controlled, and a compact copper layer is obtained; and through the final-stage cooling and tempering process control, the matrix structure of the steel matrix is regulated and controlled, tempered sorbite is formed, and the mechanical property of the cylinder body is improved.

The invention provides an MXene-derived bimetallic composite material as well as a preparation method and application thereof, and relates to the technical field of catalysts. In the MXene-derived bimetallic composite material provided by the invention, a 3D ordered pore structure provides a channel for organic pollutant molecules and H2O2 to transfer mass to a catalytic active center in the material; tiO2 and the MCuFe-MOF generate photo-induced electrons, a TiO2 / Ti3C2Tx Schottky junction and a MCuFe-MOF / Ti3C2Tx Schottky junction promote separation and transfer of charges, and Fe < 3 + > / Fe < 2 + > circulation is accelerated; the synergistic effect of a redox pair between iron and copper in the MCuFe-MOF is shown as a copper-iron bimetal oxide or a copper-iron bimetal organic framework and the like, interface electron transfer can be accelerated, rapid reduction of Fe < 3 + > and Cu < 2 + > is promoted, the Fenton reaction efficiency is improved, and the photo-Fenton catalytic activity is excellent.