476 results about "Oxygen-free copper" patented technology

The invention discloses a method for improving deformation uniformity of a core wire of an NbTi superconducting wire, and belongs to the technical field of superconducting wire processing. The method comprises the following steps: performing deep hole drilling on an oxygen-free copper ingot rod, then assembling, welding and extruding the oxygen-free copper ingot rod and a single-core rod to obtain a composite rod, and performing multi-pass drawing on the composite rod to obtain the NbTi superconducting wire with high performance, low loss and high N value. The Jc of the prepared NbTi superconducting wire is 2880-3120 A / mm < 2 >, the loss is 450-550 mJ / cm < 3 >, the N value is 70-95, compared with a superconducting wire prepared through a conventional process, the N value is remarkably increased, the loss is remarkably reduced, the critical current density is increased, and the NbTi superconducting wire has wide application prospects in MRI magnets.

The invention relates to the technical field of metal processing control, in particular to an energy consumption control method and system for an oxygen-free copper rod up-drawing process, and the method comprises the steps: dividing the up-drawing process, and defining core energy efficiency parameters of each stage; collecting core energy efficiency parameters of each stage in real time, and generating a core energy consumption parameter set; comparing the core energy consumption parameter set with a preset energy consumption reference model, and identifying an abnormal mode existing in each stage; adjusting weights are dynamically distributed, and a temperature-speed-flow composite optimization instruction is generated; correcting parameters of the energy consumption reference model based on historical regulation and control data, and generating an energy efficiency control rule set adaptive to process state change; and performing real-time dynamic control on the energy consumption of each stage according to the updated energy efficiency control rule set and the composite optimization instruction. By means of the method, the problems of energy efficiency unbalance and static rule stiffness caused by multi-stage parameter isolated regulation and control in a traditional process are effectively solved, full-process self-adaptive parameter collaboration is achieved, power consumption per ton is remarkably reduced, and quality stability is improved.

The invention discloses a multi-layer protection cable resistant to an extreme environment, and belongs to the technical field of cables. The cable is of a seven-layer composite structure design and sequentially comprises a conductor, an insulating layer, a shielding layer, a buffer layer, a waterproof layer, a heat insulation layer and a protective outer layer from inside to outside, and the conductor is made of high-purity oxygen-free copper; the insulating layer is made of a polyimide material and has high temperature resistance, low temperature resistance and excellent insulating property; the shielding layer is composed of a tinned copper wire woven mesh and a high-permeability permalloy foil, and electromagnetic interference is effectively shielded; the buffer layer is made of an elastic rubber material to relieve mechanical stress; the waterproof layer adopts a nanoscale fluorosilicone resin coating and has excellent waterproof performance; the heat insulation layer is made of ceramic fibers and aerogel, and efficient heat insulation is provided; and the protective outer layer is made of a high-strength and corrosion-resistant polyether-ether-ketone (PEEK) material. The cable has excellent high temperature resistance, low temperature resistance, corrosion resistance and electromagnetic interference resistance, is suitable for extreme environments, and ensures stable transmission of electric power and signals under extreme conditions.

The invention discloses a preparation method of a multi-core Nb3Sn composite wire and the composite wire. The method comprises the following steps: loading an Nb rod into an oxygen-free copper pipe to obtain a CuNb single-core rod; the CuNb single-core rods and the hexagonal copper core rods are sequentially arranged in a CuMn alloy pipe at intervals to obtain a multi-core CuNb composite sheath, and then the multi-core CuNb composite sheath is machined into a CuNb composite rod; the CuNb composite rod is machined into a CuNb composite pipe; the SnTi alloy bar is loaded into the CuNb composite tube to obtain a sub-component; a hexagonal CuMn subcomponent is obtained through machining; the hexagonal CuMn subcomponent and the SnCu alloy bar are assembled into a Ta tube and then integrally assembled into an oxygen-free copper tube to obtain a composite wire, and the composite wire is processed to obtain the Nb3Sn superconducting wire. CuNb single core rods on the outermost layer are adjusted to be in discontinuous close arrangement, the problem that machining cracking is prone to occurring in the subcomponent preparation stage due to the fact that Cu on the outer portions of the single core rods is little is solved, the deformation consistency of the wire in the composite wire machining stage is further enhanced by using the CuMn alloy on the outer portions of the subcomponents, it is also guaranteed that the wire cannot crack when stretched, and the service life of the wire is prolonged. The fan-shaped SnCu alloy bars are additionally arranged, so that sufficient Sn is ensured when the wire Nb generates Nb3Sn.

The invention discloses a self-adaptive wrapping type drawing mechanism suitable for oxygen-free copper pipe machining, and belongs to the technical field of oxygen-free copper pipe machining. The drawing device comprises a drawing base, a pipe package conveying mechanism is embedded in one end of the drawing base, and a lubricating oil adaptation mechanism is embedded in the other end of the drawing base; the drawing mechanism assembly can be exchanged according to the size of the copper pipe, and precise adaptation and efficient drawing are achieved; the lubricating oil adaptive mechanism enables lubricating oil to be evenly smeared on the surface of the copper pipe through a rotatable flexible oil wiping ring, the lubricating effect is improved, and the drawing resistance is reduced; the oil scraping and slag discharging mechanism can adjust the position of a scraping plate to scrape impurities and homogenize lubricating oil, and secondary cleaning and lubricating repair can be carried out through air and oil injection; the oil return groove filters and recovers lubricating oil, resource reutilization is achieved, and cost is reduced; the pipe bag conveying mechanism removes pipe wall vibration through flexible balls, the drawing stability is guaranteed, and the product quality is improved.

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 relates to the technical field of shovel tooth machines, and discloses a shovel tooth machining device for oxygen-free copper shovel tooth cooling fins, which mainly comprises a base, a workbench, an electric telescopic rod, a hydraulic telescopic rod, a shovel blade, a cooling device, an angle adjusting device, a circumferential adjusting device, a protective device and the like, the outer surface of the limiting shaft is rotationally sleeved with a gear, an inner gear ring is fixedly connected to the middle of the bottom face of the base, and clamping teeth are fixedly connected to the outer surface of the inner gear ring. When the direction of the oxygen-free copper block needs to be adjusted, an operator only needs to pull out the connecting rod and the limiting teeth through the pressing rod, then the base is rotated, the oxygen-free copper block on the vacuum suction cup base reaches the needed position, then the pressing rod is pressed, the pressing rod drives the connecting rod and the limiting teeth to move towards the gear ring, and then the oxygen-free copper block on the vacuum suction cup base can be adjusted. And the tooth ring is fixed and limited through cooperation of the limiting teeth and the clamping teeth, and through the design, tooth relieving machining of the oxygen-free copper block at any angle can be achieved.

The present invention relates to the technical field of superconducting materials. Disclosed are a MgB2 superconducting wire and a preparation method therefor. The preparation method comprises: melting Mg, Cu and Ti to obtain a Mg alloy ingot, processing the Mg alloy ingot to obtain a Mg alloy rod, loading the Mg alloy rod and B powder into a Nb tube to obtain a composite rod, processing the composite rod to obtain a single-core wire, loading the single-core wire into an oxygen-free copper tube, then loading into a monel tube in a densely-packed manner, and performing cold-forming treatment to obtain a multi-core composite wire; and performing high-temperature phase-forming heat treatment on the multi-core composite wire to prepare the MgB2 superconducting wire. In the present application, the Mg alloy rod containing Cu and Ti metal elements is used as a Mg source for preparing a MgB2 multi-core wire, so as to improve the plastic deformation ability of the Mg alloy rod in the wire treatment processes, and improve the grain boundary coupling, thereby improving the current carrying performance of the MgB2 superconducting wire.

The invention relates to the field of superconducting wire forming methods, in particular to a Nb3Sn superconducting wire preparation method based on multi-core wire liquid nitrogen cold drawing, and the Nb3Sn superconducting wire preparation method based on multi-core wire liquid nitrogen cold drawing comprises the following steps: preparing ultrahigh-tin-content copper-tin alloy powder by adopting a gas atomization method; the oxygen-free copper pipe, the oxygen-free copper rod and the pure niobium rod are machined, and the oxygen-free copper pipe and an oxygen-free copper bolt plug are obtained; acid pickling, cleaning and drying are carried out; uniformly fixing the pure niobium rods in the oxygen-free copper pipe to form a combined blank; performing rotary swaging to a required size, and then continuously drawing to obtain a finished wire; carrying out pulse treatment, and then carrying out air cooling to room temperature; and finally obtaining the Nb3Sn superconducting wire. According to the method, the strength and plasticity of the oxygen-free copper pipe sheath are improved through a liquid nitrogen cold drawing method, the combined blank is subjected to subzero treatment in the rotary swaging and drawing process, the plasticity of the combined blank is improved, and the high-strength and high-plasticity Ni3Sn superconducting wire can be obtained.

The invention discloses a preparation method of a superconducting composite long wire. The preparation method comprises the following steps: smelting Cu, Mn and a copper alloy to obtain a Cu-Mn-(Cr / Fe / Zr / Ag / Ti) alloy pipe; an Nb cylinder and an NbTi rod are placed in the alloy pipe to be manufactured into a single core rod; combining the single-core rod and an oxygen-free copper rod in an oxygen-free copper pipe to obtain a secondary composite rod; combining the secondary composite rod and an oxygen-free copper rod in an oxygen-free copper pipe to obtain a third composite rod; and carrying out drawing treatment on the tertiary composite rod to obtain a tertiary superconducting composite wire. The alloy resistive matrix is obtained in an alloying mode, the long-line machining capacity of the copper-manganese-based niobium-titanium superconducting wire is improved under the condition that critical current density and alternating-current loss are not reduced, the oxidation resistance of a single-core rod is obviously improved, the thickness of an oxide layer after hot extrusion is obviously reduced, the scaling frequency is effectively reduced in the machining process, and the service life of the single-core rod is prolonged. The deformation uniformity of the superconducting core wire can be effectively improved, so that the critical current density is improved, and the efficiency and cost can be improved.

The invention provides a composite bar and a welding method. The welding method comprises the following steps that chemical and mechanical composite treatment is conducted on the surfaces of a 4J29 kovar alloy pipe and a TU1 oxygen-free copper bar; the TU1 oxygen-free copper rod is placed in a liquid nitrogen medium, and after the TU1 oxygen-free copper rod is cooled to-150 DEG C, assembling is conducted; the assembled 4J29 kovar alloy pipe and TU1 oxygen-free copper bar are placed in a furnace cavity of current-assisted vacuum diffusion welding equipment, a pressure head assembly is used for axial loading, and a pulse current meter is connected with the pressure head assembly; and the assembled 4J29 kovar alloy pipe and TU1 oxygen-free copper bar are subjected to current-assisted vacuum diffusion welding machining, and the 4J29 kovar alloy pipe and TU1 oxygen-free copper bar composite bar is obtained. According to the method, the interface diffusion behavior is regulated and controlled through cooperation of the pressure field, the temperature field and the current field, dissimilar welding of the 4J29 kovar alloy pipe and the TU1 oxygen-free copper bar is achieved, the microstructure of the composite bar obtained through the method shows that defects such as air holes and inclusions are not observed in a weld joint area, the process is simplified, and energy consumption is reduced.

The invention discloses an oxygen-free copper alloy rod and a preparation method thereof, the alloy rod comprises an oxygen-free copper matrix, an element Cr, an element Zr and an element Ag, the content of the element Cu in the oxygen-free copper matrix is greater than or equal to 99.95 wt.%, the oxygen content is less than or equal to 5 ppm, the content of the element Cr is 0.1-0.3 wt.%, the content of the element Zr is 0.05-0.15 wt.%, and the content of the element Ag is 0.01-0.1 wt.%. The preparation process comprises the steps of vacuum melting, stirring, continuous casting and continuous rolling integrated machining and gradient aging treatment. According to the invention, the performance is synergistically improved through component optimization and process innovation, and the preparation process has uniqueness and unexpected technical effects, so that the defect that the strength and the conductivity cannot be balanced in the prior art is overcome. And the tensile strength is greater than or equal to 450Mpa while the electric conductivity is greater than or equal to 95% IACS.

The invention relates to an oxygen-free copper sheet and a preparation method and application thereof, and the preparation method of the oxygen-free copper sheet comprises the following steps: (1) carrying out microalloy smelting and casting on an electrolytic copper raw material to obtain a cast ingot; cr, Pb, a Cu-Ni alloy and a Cu-Fe alloy are added in the microalloy smelting process; (2) sequentially carrying out hot rolling, rough rolling and intermediate rolling on the cast ingot obtained in the step (1), and then carrying out bright annealing to obtain a blank; (3) the blank obtained in the step (2) is subjected to at least two times of first finish rolling and annealing combined treatment, and a semi-finished product is obtained; and the obtained semi-finished product is subjected to second finish rolling and post-treatment, and the oxygen-free copper sheet is obtained. The oxygen-free copper sheet with the purity reaching 4N and the performance meeting the production requirements of the ceramic copper-clad plate can be finally obtained by controlling the added elements and the content of the added elements and matching with rolling and annealing processes.

The invention discloses a cross-linked polyethylene insulated fire-resistant flame-retardant power cable, relates to the technical field of power cables, and solves the problems that a power cable in the prior art is poor in sheath wear resistance, poor in flame retardant property and easy to degrade in insulating property. Comprising a cable core base layer, the cable core base layer comprises a conductor layer, the conductor layer comprises a plurality of conductors distributed in an extending mode, and each conductor is formed by twisting oxygen-free copper filaments; the insulating layer wraps the conductor layer, and the insulating layer is made of a cross-linked polyethylene material; the cable also comprises a shielding structure layer, the shielding structure layer comprises a conductor shielding layer and an insulation shielding layer, and the conductor shielding layer wraps each conductor and is used as an inner shielding layer. According to the design of the power cable, the XLPE power cable can work under the designed field intensity for a long time, and also has high reliability, low partial discharge and excellent fire-resistant and flame-retardant expansion capability, so that the stability of power transmission is ensured.

The invention discloses a high-hardness high-thermal-conductivity gradient structure copper material which is composed of a base body and a surface layer combined on the surface of the base body, the base body is oxygen-free copper, and the surface layer is a copper boron nitride alloy composed of two phases of copper grains and a boron nitride film. The surface layer and the base body are metallurgically bonded; the boron nitride thin film in the copper boron nitride alloy is clamped between copper crystal grains to form a gradient distribution structure which is in a net shape to separate and wrap the copper crystal grains, and the boron nitride content of the gradient distribution structure is continuously reduced from the outside to the inside. The invention further discloses a preparation method of the copper material, oxygen-free copper serves as a substrate to form a base body in the copper material, copper-boron alloy with boron components distributed in a gradient mode is prepared on the surface of the oxygen-free copper substrate through laser additive manufacturing, then the copper-boron alloy on the surface of the oxygen-free copper is nitrided into copper-boron nitride alloy through nitriding treatment, and then the surface layer of the copper material is formed. And the composite copper material with high hardness and high thermal conductivity is obtained. The prepared copper material can meet the service requirements of the heat management industry on the wear resistance and the heat dissipation performance of components at the same time.

The invention discloses an ultraviolet-resistant and high-temperature-aging-resistant photovoltaic cable structure which comprises a cable conductor, and a buffer layer, an insulating layer, a shielding layer and a sheath layer which are sequentially arranged on the outer side of the cable conductor. The insulating layer is formed by co-extruding a heat-conducting buffer layer, a main insulating layer and a reflection isolating layer, and the heat-conducting buffer layer is provided with a heat-conducting channel along the axial direction; the shielding layer comprises a main body shielding layer and a thermal insulation layer. Silver-plated copper wires are embedded in the thermal insulation layer. Lotus-leaf-like bionic protrusions are arranged on the outer surface of the sheath layer, and a shape memory polymer film is embedded in the sheath layer. The cable conductor is made of high-purity oxygen-free copper and is spirally twisted, a ceramic composite coating is coated outside the cable conductor, and the buffer layer is a polytetrafluoroethylene film. According to the structure, through cooperation of multi-layer composite design and functional materials, the effects of rapid heat dissipation, improvement of temperature resistance and aging resistance, effective blocking of ultraviolet rays, enhancement of structural stability and the like are achieved, the problems that an existing photovoltaic cable is poor in weather resistance, insufficient in heat conduction and prone to structure failure are solved, and the photovoltaic cable can be widely applied to outdoor scenes such as photovoltaic power stations and the like.

The invention discloses a high-flexibility anti-interference fire-resistant cable for a robot and a preparation method thereof, and belongs to the technical field of wires and cables, the cable comprises an insulating wire core, the insulating wire core comprises a conductor, a shielding layer and an insulating layer, the conductor is formed by layering and twisting a plurality of anaerobic copper wires, tensile fibers are arranged in the middle of the conductor, the shielding layer is overlapped and lapped on the surface of the conductor, and the insulating layer is arranged in the shielding layer. A plurality of insulating wire cores and a filling layer are twisted into a cable, a composite belt is arranged on the outer side of the filling layer, the composite belt is made of glass fiber-aerogel, the overlapping rate is 15%-25%, and an inner shielding layer and an outer shielding layer are arranged on the outer side of the composite belt. And the outer side of the outer shielding layer is coated with a sheath layer. According to the invention, the composite belt can form a high-efficiency heat insulation layer in a fire hazard, and heat transfer to the wire core can be obviously delayed. The conductor is formed by stranding a plurality of oxygen-free copper wires in a layered manner, annealing is performed after stranding, and the aramid yarn is embedded in the conductor, so that the tensile stress to the metal conductor can be reduced, and the diameter of the conductor and the outer diameter of the whole cable are reduced while the conductivity and the transmission capability are maintained.

The invention belongs to the technical field of superconducting materials, and discloses an internal tin method Nb3Sn superconducting wire integrated with a piezoelectric sensing function and a preparation method of the internal tin method Nb3Sn superconducting wire. According to the method, a piezoelectric functional layer and a dielectric layer are prepared on the surface of a SnAl alloy rod, a CuAg alloy rod is installed after drilling to form a composite rod, the composite rod is inserted into an inner tin method Nb3Sn / CuNb composite pipe to be drawn into a subcomponent, then the subcomponent is bundled and installed into a Ta pipe and an oxygen-free copper pipe, and the wire is prepared through multiple times of stretching. The piezoelectric functional layer can convert micro strain into measurable electric signals, in-situ real-time monitoring of mechanical stress and the like in the wire rod is achieved, the CuAg alloy bar can stabilize the tensile strength of the wire rod and promote generation of an Nb3Sn phase, and on the premise that the superconducting performance is not affected, the operation reliability and safety of the high-field magnet under the extreme working condition are improved.

Solid powder and an organic carrier are matched according to the mass ratio of (82-86): (14-18), silver powder and titanium dihydride powder which form the solid powder are matched according to the mass ratio of 96: 4, and a solvent, a thickening agent and a dispersing agent which form the organic carrier are matched according to the mass ratio of (91-95): (2-6): (1-5). According to the Ag-Ti soldering paste, silver powder and titanium dihydride powder serve as solid phases and are matched with a specific organic carrier, by optimizing the rheological property and the vacuum brazing technology, TiH2 is decomposed to generate active Ti atoms, the active Ti atoms react with AlN ceramic to generate a continuous TiN reaction layer, and high-strength and low-defect connection of an AlN ceramic base material and an oxygen-free copper metal copper layer is achieved; a traditional Cu element is abandoned in a soldering paste system, generation of a brittle phase is avoided, and the reliability of a connector under the extreme working condition is improved; when applied to preparation of the ceramic copper-clad plate, the film has the advantages of strong silk-screen printing adaptability, uniform film thickness and low voidage.

The invention provides an oxygen-free copper sheet for a ceramic copper-clad plate, a preparation method of the oxygen-free copper sheet and the ceramic copper-clad plate, and the preparation method comprises the following steps: (1) melting and casting a copper plate raw material to obtain a cast ingot; (2) sequentially preheating and hot-rolling the cast ingot obtained in the step (1) to obtain a hot-rolled material; (3) the hot-rolled base material in the step (2) is roughly rolled, the deformation rate of each pass of rough rolling is controlled to be smaller than or equal to 30%, and a roughly-rolled material is obtained; (4) annealing the material subjected to rough rolling in the step (3) to obtain an annealed material; and (5) the annealed material in the step (4) is subjected to finish rolling, the deformation rate of each pass of finish rolling is controlled to be smaller than or equal to 35%, and the oxygen-free copper sheet for the ceramic copper-clad plate is obtained. The oxygen-free copper sheet for the ceramic copper-clad plate has excellent mechanical property and wide application prospect.

The utility model discloses a liquid nitrogen cooling high-power medium-voltage cable, which relates to the cable field, and comprises a power transmission core, a cooling pipe and a heat conduction filling strip, the power transmission core, the cooling pipe and the heat conduction filling strip are twisted to form a cable core, a soaking wrapping layer is wrapped outside the cable core, a polypropylene wrapping layer is wrapped outside the soaking wrapping layer, and the polypropylene wrapping layer is wrapped outside the polypropylene wrapping layer. And a high-density polyethylene sheath is wrapped outside the polypropylene wrapping layer. The conductors in the cable are made of oxygen-free copper materials, the outer diameter is smaller under the condition of the same conductor cross section, the structure is compact, the conductivity is excellent, and the transmission calorific value is small; circulating cooling of liquid nitrogen is achieved by arranging the liquid nitrogen pipe, heat in high-power operation of the cable can be rapidly taken away, and the current-carrying capacity of the cable is greatly improved. The cooling pipe is formed by interlocking and armoring a liquid nitrogen pipe and nickel steel, the strength is high, and the reliability of liquid nitrogen circulation is achieved; the heat conduction filling strips are arranged in the gaps between the cooling pipes and the power transmission cores, and the soaking wrapping layer is wrapped outside the cable core, so that the heat in the cable can be effectively homogenized, and the cooling efficiency is improved.

The invention relates to the technical field of copper material processing and manufacturing, in particular to a graphene copper composite material for transmission under high current density and a preparation method thereof.The method comprises the steps that cold isostatic pressing treatment is conducted on copper powder for in-situ growth of graphene, and a compressed blank is obtained; sintering the compressed blank to obtain a sintered blank; carrying out extrusion treatment on the sintered blank to obtain an extruded blank; the extrusion blank is subjected to a drawing process and annealing treatment, and the graphene copper composite material is obtained; the temperature rise of the obtained graphene copper composite material is at least 10% lower than that of oxygen-free copper under the large current density, the high-temperature conductivity is 3%-7% higher than that of TU0 oxygen-free copper, the temperature coefficient of resistance (TCR) is at least 3%-11% lower than that of pure copper, the heat conductivity coefficient reaches at least 440 W / (m.K), the conductivity is at least 105% IACS, the tensile strength is larger than or equal to 350 MPa, and the softening temperature is larger than or equal to 300 DEG C.

The invention discloses an accelerator neutron source solid-state lithium target cooling device, and relates to the technical field of accelerator neutron source medical application. An annular heat pipe is arranged on the outer ring of the side portion of an oxygen-free copper substrate, a plurality of liquid absorption cores are arranged on the inner wall of the heat pipe, and meanwhile an inner cavity of the heat pipe is filled with a working medium; when heat is generated, the heat is firstly transferred to the oxygen-free copper substrate, the evaporation section of the heat pipe is heated, the working medium in the wick is quickly evaporated and gasified, the generated steam flows to the condensation section under the driving of differential pressure and is condensed into liquid in the condensation section and releases heat, and the liquid generated by condensation returns to the evaporation section again under the capillary action of the wick. The space of the arranged heat pipe is large, and in the aspect of heat dissipation, the working medium is subjected to gas-liquid phase change in the heat pipe under the action of the liquid absorption core, so that the accelerator is rapidly dissipated, heat on the solid target material film can be rapidly taken away, and the cooling effect on the accelerator is greatly improved.

This invention discloses a conveniently detachable, actively water-cooled solid-state deuterium target based on a compact neutron source, comprising a micron-sized solid titanium film, a titanium film carrier, and a water-cooled substrate. Deuterium is deposited in the solid titanium film by bombarding it with a deuterium ion beam, and neutrons are generated by collisions with the subsequent deuterium ion beam. Oxygen-free copper, with its high thermal conductivity, is used as the carrier for the titanium film. The threaded structure on the side of the titanium film carrier allows for convenient installation and removal from the water-cooled substrate. The oxygen-free copper substrate, with multiple annular water-cooling structures inside, enables rapid and effective removal of heat flux from the target, preventing deuterium particles deposited in the solid titanium film from desorbing due to excessive temperature, thus avoiding impact on neutron yield. This invention provides a conveniently detachable, actively water-cooled solid-state deuterium target suitable for compact deuterium-deuterium neutron generators, providing a sound technical foundation for the widespread application of compact accelerator neutron source systems in production and daily life.

According to the temperature control system for ceramic copper-clad plate processing provided by the invention, the adjustment value of the temperature control device is determined based on the difference between the preset oxidation temperature and the oxidation temperature data of oxygen-free copper in the surface oxidation process of heating equipment, so that the forming quality of an oxygen-free copper oxide layer is ensured; the power adjustment value of the heating element in the laminating process is determined based on the characteristic difference between the resin adhesive melting characteristic and the standard melting characteristic of the resin adhesive in the laminating process, so that sufficient melting can be realized in the laminating process, and based on the relationship between the real-time heating temperature of the ceramic copper-clad plate in the hot press and the preset temperature range, the heating efficiency of the ceramic copper-clad plate is improved. The method comprises the following steps: determining an adjustment value of heating power of a hot press to ensure the final performance of a ceramic copper-clad plate, determining adjustment parameters of an etching temperature control device to ensure the etching precision and quality based on the etching rate of the ceramic copper-clad plate in the etching process, and determining cooling parameters of laser cutting based on heat generated by the ceramic copper-clad plate in the laser cutting process. The cutting quality is ensured.

The invention discloses a preparation method for preparing oxygen-free copper through efficient impurity removal of recycled copper, which comprises the following steps: heating and melting the recycled copper to obtain a recycled copper melt, and determining the content of copper element by adopting spectral analysis; oxygen is continuously introduced into the regenerated copper melt, impurity removal agent powder is weighed according to the content of impurity elements and sprayed into the furnace together with the oxygen to react with impurities in the melt, and the regenerated copper melt subjected to impurity removal is obtained; continuously introducing natural gas melt into the regenerated copper melt subjected to impurity removal, weighing deoxidant powder according to oxygen content in the natural gas melt, and spraying the deoxidant powder into the furnace by using the natural gas to react with oxygen in the melt, so as to obtain a regenerated copper melt subjected to oxygen removal; and standing the deoxidized regenerated copper melt, removing scum in the melt, and casting to obtain an oxygen-free copper product. According to the method, the impurity removal agent and the deoxidant powder are used in a combined mode, the time needed by oxygen impurity removal and natural gas reduction is shortened, the quality of the molten copper is improved, consumption of production materials is reduced, the production efficiency is improved, the production cost and pollution to the atmospheric environment are reduced, and the method is suitable for large-scale application.

The invention relates to the technical field of radiation detection, and discloses a double-wire proportional counter tube and a signal processing method thereof. The double-wire proportional counter tube comprises a cavity made of TU2 oxygen-free copper, two 50 [mu] m gold-plated tungsten wires are arranged in the cavity in parallel to serve as anode wires, the distance between the wires is 1.8 cm, and the anode wires are led out through ceramic insulation terminals. And P10 gas is filled in the cavity. And the signal processing module comprises a pre-amplification circuit, a coincidence circuit, a main amplification circuit and a data acquisition unit, and is used for carrying out coincidence processing on the two paths of anode signals and screening effective signals. The signal processing method comprises the steps of gas ionization, electron avalanche amplification and signal synchronous judgment and recording. The ray measuring device integrates the counting tube, a gas path system and a data acquisition system, background noise is reduced through a coincidence circuit, and an energy spectrum analysis module can be selected to distinguish alpha rays and beta rays. The invention has the advantages of simple structure, high sensitivity, low background noise and the like.

This invention relates to a pre-fabricated tritium target based on a polycrystalline film and its manufacturing method, belonging to the field of plasma technology. The pre-fabricated tritium target includes an oxygen-free copper target substrate, a first zirconium film, a high-entropy ceramic tritium-blocking layer, and a second zirconium film sequentially deposited on its surface. The manufacturing method includes: pre-treating the oxygen-free copper target substrate; sequentially depositing multiple layers of films using a magnetron sputtering process to form a polycrystalline film layer; purging the oxygen-free copper target substrate with the polycrystalline film layer with tritium; and bonding the oxygen-free copper target substrate to an oxygen-free copper target holder. The pre-fabricated tritium target based on a polycrystalline film of this invention solves the problem of balancing heat dissipation and tritium blocking performance in traditional processes, achieving a balance between heat dissipation and tritium blocking capabilities. This allows the prepared pre-fabricated tritium target to be reused, improving the utilization rate of the pre-fabricated tritium target and reducing the cost of using neutron tubes.

The invention provides a boost inductor capable of reducing inverter loss, and relates to the technical field of inverters, a magnetic core is made of a graded nanocrystalline soft magnetic composite material, the magnetic core is composed of iron-based nanocrystalline alloy particles, the particle size gradually changes from 10-15 microns of a central layer to 25-50 microns of an outer layer, a gradient structure is formed through a layered compaction process, and the thickness of the gradient structure is larger than that of the iron-based nanocrystalline alloy particles. The winding comprises a main winding and an auxiliary winding, the main winding is a high-conductivity oxygen-free copper wire, the auxiliary winding is a carbon nanotube reinforced copper composite wire containing a multi-walled carbon nanotube with the weight ratio of 1%, the main winding is wound in a standard spiral mode, and the auxiliary winding is inserted between coils of the main winding in a staggered mode and is compacted in a layered mode to form a gradient structure; and the magnetic field distribution is obviously optimized, the eddy current loss is reduced, the stability of the gradient structure is ensured, and the magnetic core has the high saturation flux density of the nanocrystalline alloy and the low loss characteristic of the graded nanocrystalline soft magnetic composite material, so that the effect of improving the high-frequency working efficiency of an inverter is realized.

The invention relates to a continuous casting-continuous extrusion short-process forming process for a large-width copper plate strip, and belongs to the technical field of metal processing. The method comprises the following steps: preheating and drying high-purity cathode copper, melting in a smelting device, covering the surface of molten copper with charcoal and graphite flakes, carrying out on-line degassing, deoxidizing and stirring, upwards leading a copper rod by adopting a traction unit, and extruding between an extrusion wheel and a compaction wheel; a four-high rolling mill is used for rolling; cleaning and passivating the annealed copper plate strip, spraying a lanthanum (III)-containing silane-benzimidazole lubricant solution on the surface of the copper plate strip, and drying; slitting to obtain a large-width copper plate strip; the lanthanum (III)-silane-benzimidazole lubricant is prepared from vinyltriethoxysilane, deionized water, ethanol, benzimidazole and lanthanum nitrate hexahydrate (III), and the lanthanum (III)-silane-benzimidazole lubricant is prepared from the vinyltriethoxysilane, the deionized water, the ethanol, the benzimidazole and the lanthanum nitrate hexahydrate (III); the prepared copper plate strip is high in purity, low in oxygen content, high in conductivity and excellent in mechanical property, and the technical requirements of the high-end field for the high-purity high-conductivity oxygen-free copper plate strip are met.