594 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 is suitable for the technical field of oxygen-free copper rod production management and control, and particularly relates to an oxygen-free copper rod production management and control method, system and equipment, and the method comprises the steps: obtaining first production data and first process parameters of an oxygen-free copper rod in a current production link; determining a state value of the first process parameter; acquiring a second process parameter of the oxygen-free copper rod in the next link of the current production link; determining second production data based on the first production data and the second process parameter under the condition that the first process parameter is determined to be adjusted according to the state value of the first process parameter; and under the condition that the production quality of the oxygen-free copper rod in the next link is determined to be unqualified based on the second production data, the second process parameter is adjusted. According to the oxygen-free copper rod production management and control method provided by the embodiment of the invention, the problems that the efficiency is low and the quality problem is difficult to find and solve in time in the production process of the oxygen-free copper rod can be solved.

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 Nb3Sn superconducting wire for a light-emitting device and the Nb3Sn superconducting wire, and relates to the technical field of superconducting, and the method comprises the following steps: depositing a rare earth element film on the surface of a SnTi alloy rod to obtain a first rare earth element alloy rod; a hole is drilled in the center of the first rare earth element alloy rod, a CuTa alloy rod is inserted, and a second rare earth element alloy rod is obtained; the second rare earth element alloy bar is inserted into the inner tin method Ni3Sn CuNb composite pipe, and an inner tin method Ni3Sn subcomponent is obtained; a plurality of inner tin method Ni3Sn subcomponent clusters are loaded into a Ta tube and an oxygen-free copper tube, and an inner tin method Ni3Sn final blank is obtained; and stretching the internal tin method Ni3Tin final blank to obtain the Ni3Tin superconducting wire. The rare earth element film is deposited on the surface of the SnTi alloy bar, the application range of the Nb3Sn superconducting wire is expanded, and due to the existence of the CuTa alloy bar, the tensile strength of the wire is stable after the heat treatment process, and wire damage caused by collision is prevented.

The invention discloses a preparation method of an ultra-fine grain copper target material, which comprises the following steps: step 1, sequentially cleaning and polishing an oxygen-free copper plate to obtain a pre-rolled plate; secondly, the two pre-rolled plates are overlapped and fixed, then multi-pass rolling is conducted at the temperature below the recrystallization temperature of the oxygen-free copper plate, and rolled plates are obtained; thirdly, the rolled plate is cut from the middle, then the first step and the second step are repeated for multiple times, and a machined plate is obtained; and fourthly, the machined plate is subjected to recovery annealing and then is sequentially straightened, machined and cleaned, and the ultra-fine grain copper target material is obtained. According to the method, the copper plate is subjected to severe plastic deformation by adopting an accumulative roll-bonding technology, the refining limit of a traditional machining mode on the grain size is broken through through large dependent variable, super refining of the grain size of pure copper is achieved, the ultra-fine grain target material is obtained, used equipment is simple, the size of a prepared sample is large, continuous industrial production of ultra-fine grain plates can be achieved, and the method is suitable for industrial production. And the method is a very potential production technology for industrialization of the ultra-fine grain target material.

The invention relates to the technical field of resistance testing, in particular to an on-line resistance testing method and system for an oxygen-free copper rod, and the method comprises the steps: monitoring the electromagnetic field change in the production process of the oxygen-free copper rod, and recognizing the resistance abnormality caused by the internal structure change of a material and the machining stress; applying currents with different intensities to the copper rods with abnormal resistance, performing real-time measurement and preliminary screening on instantaneous resistance of the copper rods, and identifying the copper rods with possible abnormal resistance; based on a feature extraction algorithm, performing feature analysis on the preliminarily screened abnormal copper rod; and comparing the source and the property of the abnormal resistance with a preset quality standard to obtain an online resistance test result. According to the invention, the problem that the traditional off-line resistance test cannot monitor the resistance change in real time in the production process is effectively solved, the phenomenon of inconsistent product quality caused by the fact that the process fluctuation is not detected in time is avoided, and the high-precision and real-time on-line resistance test is realized.

The invention relates to a preparation method of a photovoltaic welding strip, the photovoltaic welding strip, a photovoltaic module and a preparation method, and the preparation method comprises the following steps: S1, carrying out the oxide removal and annealing treatment of an oxygen-free copper wire at the same time, and obtaining an annealed copper strip after cooling; s2, in the protection environment of inert gas, the annealed copper strip is immersed in molten brazing filler metal alloy liquid for surface tin plating, and after cooling, a plated copper strip with an alloy plating layer is obtained; s3, oxide on the surface of the plated copper strip is removed; s4, immersing the plated copper strip subjected to oxide removal into a film forming substance, and drying to obtain a film forming welding strip; wherein the film forming substance does not contain carboxyl. According to the method, oxide removal and annealing treatment are carried out at the same time, the photovoltaic welding strip which is high in preparation efficiency and can be welded without participation of scaling powder can be achieved, the photovoltaic welding strip is combined with the preparation technology of a photovoltaic module, and a high-reliability module can be obtained.

The invention relates to the technical field of heat sink materials, in particular to a modified gold tin-hard gold plated heat sink material and a preparation method and application thereof. Comprising a first heat sink layer, a nickel plating layer, a gold plating layer, a gold-tin solder layer, a gold plating layer, a nickel plating layer, a second heat sink layer, a nickel plating layer, a hard gold plating layer and a modified gold-tin-silicon solder layer which are sequentially connected from bottom to top. The first heat sink layer is made of oxygen-free copper, the second heat sink layer is made of molybdenum copper or tungsten copper, and the hard gold plating layer comprises a nickel plating layer and a tungsten titanium gold plating layer which are sequentially connected from bottom to top. Tungsten and titanium are introduced into the gold-plated layer on the surface of the heat sink material, so that the hardness and corrosion resistance of the gold-plated layer are remarkably enhanced; a small amount of silicon is doped into the gold-tin solder, so that the shaping processing performance of the gold-tin brittle solder is improved; one-time forming of the solder-heat sink composite material is achieved in a vacuum thermocompression welding mode, and the problem of cavities or overflow caused by solder size errors in the welding process is solved.

The invention discloses a high-flexibility bending-resistant synchronous twisted-pair shielding flame-retardant towline cable, and relates to the technical field of cables, the towline cable comprises a plurality of chain links, the plurality of chain links form a towline, the inner side of each chain link is provided with a cable structure, each chain link is provided with a cable blocking structure, the cable structure comprises an outer sheath layer, and the outer sheath layer is provided with an outer sheath layer. The inner side of the outer coating layer is provided with a braiding layer, the inner side of the braiding layer is provided with a wrapping layer, the inner side of the wrapping layer is provided with a core wire, the inner side of the core wire is provided with a conductor, the inner side of the wrapping layer is provided with a filler, and the cable structure is formed by synchronously completing pair twisting and total twisting of five types of oxygen-free copper flexible conductor wires or six types of oxygen-free copper flexible conductor wires. The outer diameter of the finished cable is small, the bending resistance of the cable structure is enhanced, the phenomenon that the cable structure is prone to open circuit and short circuit in the high-frequency bending process is avoided, and meanwhile, through the cooperative use of the cable blocking structure and the disassembly and assembly structure, when the single cable structure is damaged, independent disassembly and replacement can be carried out.

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.

The invention discloses a photovoltaic V-shaped copper-aluminum composite belt and a production process thereof. The production process comprises the following steps: (a) rolling a copper belt; (b) rolling an aluminum belt; (c) carrying out composite molding; (a) rolling a copper strip, namely processing the oxygen-free copper wire to obtain the copper strip, and (b) rolling an aluminum strip, namely processing the aluminum strip to obtain the aluminum strip; (c) composite forming is conducted, specifically, the copper strip obtained by rolling the copper strip in the step (a) and the aluminum strip obtained by rolling the aluminum strip in the step (b) are subjected to cold rolling compounding, and a copper-aluminum composite strip is obtained; and (d) V-shaped surface forming is conducted, specifically, rolling forming is conducted on the aluminum strip surface of the copper-aluminum composite strip, a V-shaped groove is formed, and the V-shaped copper-aluminum composite strip is obtained. Copper and aluminum compounding is achieved, the conductive performance close to that of a copper material is achieved, and a large number of copper resources are saved; the V-shaped copper-aluminum composite belt can reflect sunlight irradiated on the surface, the sunlight can reach the surface of the cell through secondary reflection, the sunlight can be reused, and the utilization rate of the sunlight is improved.

The invention discloses an oxygen-free copper rod up-drawing continuous casting take-up device, and relates to the technical field of oxygen-free copper take-up. Comprising a driving table and a support, the support is arranged at the top of the driving table, a driving mechanism is arranged in the driving table, a reciprocating lead screw is transversely arranged on one side of the support, a sliding block is movably installed on the outer side of the reciprocating lead screw, a guide assembly is arranged at the bottom end of the sliding block, and the guide assembly comprises a wire guide block; a guide plate is arranged on one side of the support and located below the reciprocating lead screw. A storage pipe, a straight pipe, an inclined opening and a push rod are arranged in the guide assembly, so that the ball can be replaced without detaching a wire guide block. In the transmission process of the copper rod wire, when the balls are abraded, a new ball can be conveniently replaced into the copper wire guide hole by using the push rod, so that the transmission smoothness of the copper rod wire is ensured, and the equipment shutdown maintenance time caused by ball faults is reduced.

The invention discloses a method and a device for preparing an oxygen-free copper pipe from regenerated copper, a corrosion-resistant copper pipe and a casting process, and belongs to the field of copper treatment, and the corrosion-resistant copper pipe has the oxygen element content of less than 5 ppm, the hydrogen element content of less than 0.3 ppm, the phosphorus element content of 0.1-0.3% and the balance of copper element; the method for preparing the oxygen-free copper pipe through the regenerated copper comprises the steps that S1, molten copper in a shaft furnace is heated to the set temperature, the concentration of reducing gas in the shaft furnace is adjusted, the oxygen element content of the molten copper in the shaft furnace is increased to be larger than 30 ppm, and primary impurity removal is conducted; s2, the molten copper in the shaft furnace is sequentially introduced into a chute, a refining furnace, a standing furnace and a casting furnace, the temperature of the molten copper in the chute, the refining furnace, the standing furnace and the casting furnace is gradually decreased, inert gas and reducing gas are introduced into the chute, the refining furnace, the standing furnace and the casting furnace, and the flow and pressure of the inert gas and reducing gas introduced into the chute, the refining furnace, the standing furnace and the casting furnace are gradually decreased; and performing secondary impurity removal. The method is mainly used for preparing the oxygen-free copper pipe through the regenerated copper and preparing the corrosion-resistant copper pipe.

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 for producing an ultra-pure oxygen-free copper rod through an up-drawing continuous casting method, and belongs to the technical field of metal material machining. Comprising the following steps: selecting a cathode copper sheet as a raw material, performing oxygen-free copper rod traction in a three-body furnace consisting of a melting furnace, a transition bin and a holding furnace by adopting an up-drawing continuous casting method, adding the dried electrolytic copper sheet and charcoal into the melting furnace, and adjusting the temperature of a melt in the melting furnace; the molten copper liquid automatically flows into a transition bin to be subjected to standing and impurity removal, and charcoal and graphite flakes are laid on the surface of the copper liquid; a graphite crystallizer is inserted into molten copper, a guide rod is connected, a guide rod is prepared, the inlet and outlet water temperature of the crystallizer is adjusted, and the traction speed and pitch of a cast rod are set. According to the method, the oxygen content of the produced ultra-pure oxygen-free copper rod can be reduced to 3 ppm or below by controlling the quality of the cathode copper sheet of the copper rod, the temperature of the copper liquid, the solidification supercooling degree of the copper rod, the rod casting speed, the conditions of the crystallizer and combined control over charcoal and graphite flake reduction, and the application additional value of the oxygen-free copper rod is greatly improved.

The invention discloses a large-size low-grain-size 4N5 oxygen-free copper plate and a preparation method thereof, and the preparation method comprises the steps of first-fire forging, second-fire forging, third-fire forging and heat treatment to obtain the 4N5 oxygen-free copper plate. Through multiple times of upsetting and drawing in the forging process, crystal grains in metal are repeatedly crushed and recrystallized, the crystal grains are refined, then the heat treatment process is combined, the crystal grain size of the oxygen-free copper plate is further refined, large-size crystal grains are reduced, the structure uniformity of the oxygen-free copper plate is better, and the mechanical property of the oxygen-free copper plate is higher. After the low-grain-size 4N5 oxygen-free copper plate prepared through the method is precisely machined, due to the fact that the grain size of the low-grain-size 4N5 oxygen-free copper plate is small, grain growth is not obvious, residual stress is released in the heat treatment process, and then the problem that grains of a large-specification 4N5 oxygen-free copper plate grow abnormally in the high-temperature environment is solved.

The invention discloses a flat plate and penetrating pipe combined type divertor cooling module and a preparation method. The flat plate and penetrating pipe combined type divertor cooling module comprises a tungsten block, a base body, an oxygen-free copper layer, a heat sink and a cooling water pipe. Processing an oxygen-free copper layer on the inner wall of the tungsten block to form a tungsten copper block; the tungsten copper block is connected with the heat sink; the heat sink is connected with the base body; the base body is connected with the cooling water pipe, and the cooling water pipe is arranged in a one-inlet and one-outlet mode. According to the saddle-shaped tungsten copper block manufactured through the method, the tungsten sheet and the tungsten copper sheet can be prevented from falling off, the function of a pipe penetrating type module is met, a half of tungsten material is saved, the saddle-shaped tungsten copper block is machined through a mold, the thickness of the tungsten block can be conveniently increased in the middle thickness direction, the maximum temperature difference of the tungsten copper block can be reduced, and the maximum thermal stress of the tungsten copper block can be reduced; and meanwhile, the tungsten block structure on the side surface can better protect the side surface from bearing a plasma transient heat flow, so that the service life of the combined structure is remarkably prolonged.

The invention relates to a quantum bit packaging device. The quantum bit packaging device comprises a shell, a substrate, a PCB (Printed Circuit Board) and a connector group, the shell is of a hollow structure and is made of an oxygen-free copper material; the substrate is transversely arranged in the shell, the substrate is of a straight-plate-shaped structure, a preassembling opening is formed in the substrate, and the preassembling opening is suitable for placing a chip; the PCB is transversely arranged in the shell, the PCB is located on the substrate, and the PCB abuts against the substrate; the connector group is arranged on the PCB, the connector is provided with a plurality of connectors, and the plurality of connectors and the PCB are longitudinally inserted. The quantum bit packaging device provided by the invention is high in integration level and easy to carry and deploy. Specifically, the PCB is tightly abutted against the substrate, and the chip is mounted between the substrate and the PCB, so that the overall integration level is high, the electrical connection stability between the components is further improved, and the later maintenance and upgrading work is greatly facilitated.

The invention relates to a preparation method of an oxygen-free copper sheet for an AMB ceramic copper-clad plate, and the preparation method comprises the following steps: preparing an oxygen-free copper ingot of which the purity is greater than or equal to 4N and the oxygen content is less than 5ppm, and sequentially carrying out preheating, hot rolling, common annealing, surface milling treatment, rough rolling, cold intermediate rolling and low-temperature bright annealing combined process and finish rolling to obtain the oxygen-free copper sheet for the AMB ceramic copper-clad plate, the oxygen-free copper sheet for the AMB ceramic copper-clad plate obtained through the preparation method is good in grain stability during high-temperature welding, and meanwhile the grain size after welding is smaller than 200 micrometers.

The utility model discloses an anti-deformation slow pressure type welding gun cable, which comprises an electroplated spring tube, a double-core integrated control wire core and a plurality of oxygen-free copper strands which are twisted around the outside of the electroplated spring tube to form a cable core, and the outside of the cable core is sequentially coated with a cross-linked fluororubber longitudinal hole insulator, an AFRP reinforced wrapping layer and a chloroprene rubber outer sheath. A plurality of longitudinal holes are uniformly distributed in the circumferential direction of the cross-linked fluororubber longitudinal hole insulator, the longitudinal holes are filled with para-position type wholly aromatic copolyamide stretched fiber core materials, and the outer diameter of the chloroprene rubber outer sheath is 18-25 mm. The welding gun cable core is round and balanced in structure, high in mechanical strength, better in bending resistance, capable of relieving lateral pressure, beneficial to preventing wire and core breakage and enhancing safety and reliability, and better in durability and applicability.

The invention discloses a preparation method of a PVD (Physical Vapor Deposition) semiconductor reaction cavity water-cooling plate assembly and the water-cooling plate assembly, and relates to the technical field of semiconductor water-cooling plate preparation. The method comprises the steps that according to the size of a target base, an oxygen-free copper material is cut, then rough machining is conducted, and a base blank is obtained; cutting the oxygen-free copper material according to the size of the target cover plate, and performing rough machining to obtain a cover plate blank; performing heat treatment on the cover plate blank to obtain a heat-treated cover plate blank; after a base blank and the heat treatment cover plate blank are assembled, welding is conducted, and an assembling assembly is obtained; performing water pressure detection on the assembly component under the water pressure of 0.6-0.8 MPa; and carrying out finish machining on the assembly component passing through the water pressure detection, and then carrying out helium leak detection to obtain a finished product water-cooling plate component. The water cooling plate assembly can be tightly combined with the semiconductor reaction cavity, the welding sealing performance is high, the heat conduction efficiency is high, heat is taken away through water cooling transfer, semiconductor equipment can be rapidly cooled, and the cooling efficiency is high.

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 a preparation method of an artificial pinning NbTi multi-core superconductive composite wire, and relates to the technical field of superconductive material processing, and the method comprises the following steps: combining Ti wires and NbTi wires, twisting, carrying out fixed-length cutting, loading into an oxygen-free copper pipe to obtain an NbTi / Ti / Cu core rod, loading into an oxygen-free copper sleeve, carrying out seal welding to obtain an NbTi / Ti / Cu multi-core ingot blank, carrying out thermal diffusion treatment, and carrying out hot rolling to obtain the artificial pinning NbTi multi-core superconductive composite wire. NbTi / Ti / Cu manual pinning ingot blanks are obtained, hot extrusion is carried out, NbTi / Ti / Cu manual pinning composite rods are obtained, the NbTi / Ti / Cu manual pinning composite rods are drawn to the aging heat treatment size, aging heat treatment is carried out, and the manual pinning NbTi multi-core superconducting composite wire is obtained. According to the preparation method, the Ti wire and the NbTi wire are twisted, and thermal diffusion, hot extrusion, drawing and aging heat treatment are combined, so that the preparation difficulty is reduced while the critical current density is improved.

The invention relates to a light-weight high-power pumping source which comprises a shell and N sets of pumping light chips installed in the shell in a partitioned mode, N is an integer larger than or equal to 1, and each set of pumping light chips comprises a corresponding coupling mirror set. Each group of pump light chips is used for emitting pump laser with different wavelengths, the pump laser is subjected to beam shaping through the respective corresponding coupling mirror group and then is coupled to the output optical fiber through the output mirror group, and the shell is made of a graphene reinforced aluminum-based composite material. On one hand, excellent mechanical performance and stability are kept, and on the other hand, the density of the fiber laser is far lower than that of oxygen-free copper, so that the weight of a pumping source under unit power is effectively reduced, and the whole fiber laser system is lighter and easier to install and maintain; meanwhile, the multi-wavelength pump light chip is introduced, the wavelength distribution of the pump light is optimized, the pump light is made to better conform to the absorption characteristic of the ytterbium-doped optical fiber, the thermal load of the ytterbium-doped optical fiber is effectively dispersed, the threshold value of the mode instability effect is remarkably increased, and therefore the power output capacity and the long-term operation stability of an optical fiber laser system are improved.