1085 results about "Copper alloy" patented technology

The invention discloses a corrosion-resistant copper alloy pipe. The corrosion-resistant copper alloy pipe comprises the following components in percentage by mass: 0.05-0.40% of P, 0.001-0.1% of X, and the balance of Cu and inevitable impurities, wherein the X is selected from at least one of Al, Ni or RE; in the structure of the copper alloy pipe, the volume fraction of the small-angle grain boundary is 40-65%, and the volume fraction of the large-angle grain boundary is 25-50%. The copper alloy pipe has good corrosion resistance and oxidation resistance, and meanwhile beneficial bending, flaring, welding and pressure resistance are guaranteed. The invention further discloses a preparation method of the copper alloy pipe. The technological process of the preparation method comprises the steps of smelting, casting, face milling, rolling, stretching, rewinding and secondary annealing. Wherein the secondary annealing temperature is 350 to 580 DEG C, and the annealing time is 0.5 to 3.5 hours. The invention further discloses application of the copper alloy pipe and the copper alloy pipe prepared through the preparation method to preparation of a heat conduction pipe of an air conditioner heat exchanger, an air conditioner indoor and outdoor unit connecting pipe or a built-in pipe or a pipe assembly.

The invention provides a zinc-copper-nickel-copper smelting deslagging agent and a preparation method and a use method thereof. The zinc-copper-nickel-copper smelting deslagging agent comprises the following raw materials in percentage by mass: 5-15% of calcium fluoride, 20-30% of sodium carbonate, 5-15% of sodium fluoride, 10-20% of sodium hexafluoroaluminate and the balance of borax. Compared with the prior art, the zinc-copper-nickel-copper slag remover prepared by mixing the raw materials can effectively reduce impurities to be less than 0.14% of Fe, less than 0.005% of Pb and less than 0.003% of Si in the smelting process, the impurity components are obviously reduced, the number of times of component adjustment and unqualified sampling is reduced, impurities mixed in a casting blank are reduced, and finally the metal purity and the casting quality are improved. Meanwhile, loss of zinc and nickel is reduced to the maximum extent; and adverse effects on the zinc-copper-nickel alloy are avoided.

The invention belongs to the technical field of metal-based composite materials, and particularly relates to a method for integrally preparing complex-shaped tungsten-copper alloy through injection molding and sintering, which comprises the following steps: mixing and preheating tungsten powder and copper powder; preparing a composite plasticizer matrix, mixing and granulating to obtain a granular mixed material; injecting the granular mixed material into a cavity of a steel mold through an extruding machine at the temperature of 150-200 DEG C; cooling and demolding to obtain a molded blank; the obtained formed blank is heated to 800-900 DEG C at the heating speed of 100-200 DEG C / h, and presintering is conducted for 1-2 h; and the pre-sintered formed blanks are arranged in a graphite boat at intervals, landfill and compaction are carried out through emery, then the formed blanks are heated to 1400-1450 DEG C, heat preservation is carried out for 2-2.5 h, and sintering and post-treatment are carried out. The method provided by the invention effectively solves the technical problems that an infiltration link is needed in a traditional production mode of the material, the material is not uniform, the mechanical and electrical properties are low, and a complex structure is difficult to directly form.

The invention provides a copper-nickel-tin alloy strip and a preparation method thereof, and relates to the technical field of copper alloys. The copper-nickel-tin alloy strip provided by the invention comprises the following components in percentage by mass: 8.5%-10% of Ni, 1.5%-3% of Sn, 0.5%-1.5% of Al, 0.3%-0.6% of Si, 0.19%-0.21% of Cr, 0.05%-0.30% of Mn and the balance of Cu. The tensile strength of the copper-nickel-tin alloy strip ranges from 580 MPa to 770 MPa, the percentage elongation after fracture A50 is larger than or equal to 8%, the hardness ranges from 170 HV to 240 HV, the electric conductivity is larger than or equal to 10% IACS, and the grain size is smaller than or equal to 0.015 mm. And the material can be stably applied to elastic sensitive elements of electronic industrial relays, potentiometers, switches, connectors, lead frames, control and instrument sensors and the like.

The invention discloses a high-strength and high-plasticity copper alloy and a preparation method thereof. The high-strength and high-plasticity copper alloy is prepared by mixing Cu-Al pre-alloyed spherical powder and CuO powder according to the mass ratio of (100-150): 1, wherein the Cu-Al pre-alloyed spherical powder and the CuO powder are different in particle size range. The solid solution state Al element part in the high-strength plastic copper alloy is oxidized into Al2O3 through CuO, and the Al2O3 exists in a Cu matrix. The preparation method comprises the following steps: (1) mixing Cu-Al pre-alloyed spherical powder with CuO powder, and drying; (2) cold isostatic pressing treatment; (3) vacuumizing, sintering at a high temperature in a protective atmosphere, and cooling; (4) vacuumizing, reducing in a reducing atmosphere, and cooling; and (5) after preheating, the copper alloy reduction blank is placed in a rotary forging die, rotary forging and air cooling are conducted, and the copper alloy is obtained. The high-strength plastic copper alloy is good in conductivity and mechanical property and high in plasticity. The method is simple in process, environmentally friendly, low in cost and suitable for industrial production.

The invention discloses a method for preparing fine-grain copper and copper alloy through pulsed magnetic field and rare earth adding composite regulation and control, and belongs to the technical field of copper and copper alloy material preparation. Graphite mold casting is adopted in the method, and the method comprises the specific steps that electrolytic copper with the purity larger than or equal to 99.95 wt% or a copper alloy with specific components is prepared as a matrix raw material; after smelting, adding pure lanthanum blocks and uniformly stirring; after the melt is poured into a preheating mold, a pulsed magnetic field is applied immediately for treatment, and the parameters of the magnetic field are as follows: the pulse voltage is 180-250 V, the frequency is 4.5-6.5 Hz, and the duration time is 15-20 minutes. According to the method, the heterogeneous nucleation effect of rare earth lanthanum is combined with the melt forced convection and dendritic crystal crushing effect caused by the pulsed magnetic field to synergistically refine a solidification structure and promote columnar crystal orientation equiaxed crystal transformation, so that a cast ingot with fine crystal grains is directly obtained in the casting stage, and the possibility is provided for simplifying the subsequent processing technology.

The invention belongs to the field of high-thermal-conductivity composite materials, and particularly relates to a 3D printing copper-diamond composite high-thermal-conductivity material and a preparation method thereof.The 3D printing copper-diamond composite high-thermal-conductivity material comprises a copper matrix and diamond particles dispersed in the copper matrix, and the surfaces of the diamond particles are provided with metal coatings; the copper matrix is formed by copper powder with the particle size of 10-100 microns, and the volume fraction of the diamond particles in the composite material is 40%-50%; according to the method, the titanium plating layer is prepared on the surface of the diamond, the stable titanium carbide transition layer is formed through the reaction of titanium and carbon, the interface thermal resistance between the diamond and copper is remarkably reduced, the interface bonding strength is improved, and heat conduction is facilitated. The selected area green laser 3D printing technology is adopted, a green laser device shows remarkable advantages in the field of 3D printing of copper alloy, and the heat conductivity of the prepared composite material can reach and is remarkably higher than that of pure copper by optimizing the diamond volume fraction and 3D printing process parameters.

The invention relates to a low-stress copper-cobalt-nickel-silicon alloy and a preparation method and application thereof. The low-stress copper-cobalt-nickel-silicon alloy comprises 0.5 wt%-1.0 wt% of Ni, 0.005 wt%-0.4 wt% of Co, 0.1 wt%-0.3 wt% of Si, 0.05 wt%-0.4 wt% of Sn, 0.01 wt%-0.02 wt% of P, 0.05 wt%-0.3 wt% of Zn and the balance Cu and inevitable trace impurities. The preparation method of the low-stress copper-cobalt-nickel-silicon alloy comprises the steps of burdening, smelting, casting, hot rolling, rough rolling, primary annealing, intermediate rolling, aging heat treatment, finished product rolling and secondary annealing. The preparation method comprises the following steps: proportioning and smelting according to the mass percent of each element of the copper alloy; the aging heat treatment is stepped aging heat treatment, heating is conducted to 200-350 DEG C, heat preservation is conducted for 1-2 h, then heating is conducted to 400-500 DEG C, and heat preservation is conducted for 10-12 h.

The invention relates to a high-strength heat-resistant brass alloy and a preparation method thereof, and belongs to the technical field of copper alloys. The high-strength heat-resistant brass alloy comprises, by mass, 69%-75% of Cu, 0.1%-1% of Sn, 1%-4% of Al, 0.5%-1.5% of Ni, 0.5%-1% of Fe and the balance Zn. The high-strength heat-resistant brass alloy comprises a core-shell structure precipitated phase with Fe wrapped by NiAl. The preparation method comprises the following steps: step 1, preparing materials; step 2, smelting; step 3, casting; fourthly, hot rolling is conducted after high-temperature solid solution; fifthly, a roughly-rolled plate is obtained through cold rolling; step 6, softening and annealing; seventhly, a finish-rolled plate is obtained through cold rolling; and step 8, performing stress relief annealing to obtain the high-strength heat-resistant brass alloy. By reasonably selecting alloy components and further regulating and controlling the heat treatment process, the brass alloy has high strength, high elongation, high hardness, high-temperature stability and excellent electric conductivity.

The invention discloses a high-performance Cu-Co-Si alloy plate and a preparation method thereof, and belongs to the technical field of copper alloy materials. The alloy plate comprises the following components in percentage by weight: 1.0-2.5% of Co, 0.2-1.0% of Si, 0.09-0.2% of Cr, 0.01-0.1% of Ni, less than or equal to 0.2% of Ti, less than or equal to 0.5% of Fe, less than or equal to 0.5% of Sn, less than or equal to 0.5% of Zn, less than or equal to 0.5% of P and the balance of Cu and inevitable trace impurities. The preparation method comprises the steps of smelting, semi-continuous casting, hot rolling, cold rolling, cleaning, stress relief annealing, solid solution, final cold rolling, aging and the like. According to the invention, alloy elements are reasonably matched and a preparation process is optimized, so that the alloy plate forms a nanoscale dispersed precipitated phase, dislocation motion is effectively hindered, grains are refined, and synergistic improvement of strength, conductivity and processability is realized. The thickness of the finished board is (0.02-0.15) + / -0.003 mm, the hardness is 180-220 HV, the electric conductivity is 62-66% IACS, the tensile strength is 620-680 MPa, 90-degree bending R / t is 0.5, and the finished board is free of surface defects and can be widely applied to the electronic and electrical field with high reliability and high performance.

The invention discloses high-strength heat-resistant aluminum-copper alloy powder, a 3D printing application method and an aluminum product. Relates to the technical field of metal material and additive manufacturing, in particular to a high-strength heat-resistant aluminum alloy material suitable for selective laser melting. The alloy powder is composed of Cu, Sc, Ni, Ce, Si, Mn, Ti, Fe and Al, the content of Cu ranges from 5 wt% to 15 wt%, the content of Sc ranges from 0.3 wt% to 2 wt%, the content of Ni ranges from 0.5 wt% to 5.5 wt%, the content of Ce ranges from 0.5 wt% to 5.5 wt%, and an Al7Cu4Ni eutectic phase is generated in situ in the printing process. And through a multi-element synergistic strengthening mechanism, the solidification interval is effectively reduced, cracks are inhibited, and meanwhile fine grain strengthening and precipitation strengthening are achieved. After SLM forming and low-temperature heat treatment, the obtained aluminum product has ultrahigh strength, good plasticity and excellent heat resistance, the tensile strength exceeds 650 MPa, the hardness exceeds 180 HV0.2, the ductility exceeds 7%, and the aluminum product meets the requirements for light high-strength heat-resistant components in the high-end fields such as aerospace and the like.

The utility model relates to the technical field of detection devices, and discloses a photoelectric width measuring device which comprises a double-shaft air cylinder and a photoelectric sensor, a magnet with a seat penetrates through and is installed on the left side of a front plate of a width measuring air cylinder connecting plate in a threaded mode, and a light eye sensing support copper sleeve shaft is arranged at the front end of the photoelectric sensor. The outer side of the optical eye induction support copper sleeve shaft is movably sleeved with a copper alloy straight sleeve type bearing, the outer ring of the copper alloy straight sleeve type bearing is movably sleeved with a width measurement contact block, and a width measurement contact probe is slidably installed in the insertion hole. A cylindrical inductive sensor penetrates through the right side of the front plate of the width measuring cylinder connecting plate and is installed in a threaded mode. According to the device, the edge position of a glass product can be accurately detected through the synergistic effect of the cylindrical inductive sensor and the photoelectric sensor, high-precision alignment measurement is achieved, meanwhile, the split type structural design is adopted, rapid separation is achieved, and the maintenance efficiency and flexibility of equipment are greatly improved.

This invention relates to the field of vacuum melting technology, and in particular to a vacuum melting furnace for copper alloys and its ultrasonic-assisted melting method, comprising the following steps: placing copper alloy raw materials into a crucible and drawing a vacuum, then filling with argon gas to a slightly positive pressure; performing induction heating to a temperature 50-120°C above the melting point to obtain a melt; lowering an ultrasonic probe into the melt for continuous ultrasonic treatment; reducing the induction heating temperature to 20-60°C above the melting point and continuing ultrasonic treatment; induction heating to the melt temperature being the pouring temperature, performing pulsed ultrasonic treatment, and pouring the melt into an ingot mold; allowing the melt in the ingot mold to continue cooling with the furnace, then removing the vacuum and opening the furnace to obtain a copper alloy ingot. This invention, using the above steps, reduces gas content, increases ingot density, effectively removes non-metallic impurities, improves copper alloy purity, refines grains, and reduces secondary oxidation and gas entrapment during pouring.

The application belongs to the technical field of copper wire preparation, and discloses a preparation process of high-strength and high-toughness copper wire. The preparation process comprises the following steps: mixing Ni, Co and Al element powders according to a molar ratio of 0.95-1.05:0.95-1.05:0.95-1.05, and then high-energy ball milling to obtain Ni-Co-Al middle-entropy alloy micro powder, and then vacuum arc melting or discharge plasma sintering to obtain Ni-Co-Al middle-entropy alloy; mixing the Ni-Co-Al middle-entropy alloy with tungsten copper alloy and copper ingot for melting, cooling the molten copper water through a condensing device, drawing out by a traction mechanism, annealing treatment, winding by a rewinding machine after cooling, and obtaining the copper wire. The application takes the copper ingot as a base material, the tungsten copper alloy as a reinforcing phase, and the Ni-Co-Al middle-entropy alloy as a bonding phase, and the copper wire is prepared by conventional mixed melting, so that the application has the advantages of simple processing method and low production cost.

Method for heating an exhaust gas sensor (26) in the exhaust system (20) of an internal combustion engine (10), wherein an electrically heated catalyst (24) is arranged in the exhaust system (20) and an exhaust gas sensor (26) is arranged upstream of the electrically heated catalyst (24) and is spaced apart from the electrically heated catalyst (24), wherein the electrically heated catalyst is heated by an electric heating element and the waste heat of the electrically heated catalyst (24) is used to heat the exhaust gas sensor (26) to its release temperature (T) by means of heat conduction via a thermal bridge (28) made of copper or a copper alloy. F ) to heat up.

The application discloses a kind of offshore wind power bearing heterogeneous material multi-field construction forming method, the contact surface of the inner ring and outer ring of offshore wind power bearing is sealed welding to obtain bearing ring blank, the bearing ring blank is hot-rolled, and bearing ring piece is prepared by synchronously applying pulse current during the hot-rolling, wherein the inner ring and outer ring are two different materials.The surface of the wind power bearing prepared by the application is copper alloy material, which has good corrosion resistance and abrasion resistance, the core is traditional alloy steel material, which has good strength and impact toughness, the heterogeneous interface also realizes mechanical combination and metallurgical combination, and finally obtains excellent comprehensive performance, which helps to realize the high-performance and low-cost manufacturing of wind power bearing heterogeneous material.

The invention discloses a Rogowski coil zero-region current sensor and a design method thereof, and relates to the technical field of current sensors, and the Rogowski coil zero-region current sensor comprises a central conductor, an insulating sleeve, a coil skeleton and a coil winding. The insulating sleeve coaxially sleeves the middle part of the central conductor, and the two ends of the central conductor are electric connection ends used for connecting an arc extinguish chamber test loop in series; the coil framework coaxially sleeves the periphery of the insulating sleeve; the coil winding is wound on the coil framework and is used for detecting current; the central conductor is made of a copper alloy material, and the surface of the central conductor is plated with silver; the ratio of the length to the outer diameter of the coil winding is 2-3; the mutual inductance coefficient of the current sensor is 10-50 [mu] H, and the dynamic range of output signals of the signal output end of the coil winding is-10 V to 10 V. The wide dynamic range, the high sensitivity and the broadband characteristics can be considered, and the characteristics of stable structure and good safety are achieved.

In a copper alloy bonding wire for semiconductor devices, the bonding longevity of a ball bonded part under high-temperature and high-humidity environments is improved. The copper alloy bonding wire for semiconductor devices includes in total 0.03% by mass or more to 3% by mass or less of at least one or more kinds of elements selected from Ni, Zn, Ga, Ge, Rh, In, Ir, and Pt (first element), with the balance Cu and inevitable impurities. The inclusion of a predetermined amount of the first element suppresses production of an intermetallic compound susceptible to corrosion under high-temperature and high-humidity environments at the wire bonding interface and improves the bonding longevity of a ball bonded part.

This invention relates to the field of copper alloy wire processing technology, and particularly to a copper alloy wire annealing equipment and its usage method, comprising an annealing mechanism, a cooling mechanism, and a receiving mechanism. The annealing mechanism includes a frame, with a plurality of first guide rollers mounted on two opposite sides of the frame, a plurality of first guide rollers mounted on the frame, two second guide rollers mounted at the end of the frame, a tubular annealing furnace mounted on the top of the frame, and a third guide roller mounted at the end of the tubular annealing furnace. Before heating the copper alloy wire, the copper alloy wire passes through a through groove, and each copper alloy wire passes through a different cleaning groove. At this time, a water pump operates to deliver cleaning water to the cleaning seat, which is sprayed out through cleaning holes to clean the copper alloy wire. Simultaneously, a first pneumatic cylinder and a second pneumatic cylinder operate to realize the reciprocating movement of a first cleaning brush and a second cleaning brush to clean the copper alloy wire and prevent impurities from adhering to the surface of the copper alloy wire.

The utility model relates to the technical field of tubing tongs, in particular to a tooth mark-free tubing tong with a plate replacement type tension sensor, which comprises a fixed handle, a tong head fixedly connected to the side surface of the fixed handle, a clamping component movably arranged on the side surface of the tong head, and a positioning seat fixedly mounted on the side surface of the tong head. The top of the positioning seat is fixedly connected with a plate ring type tension sensor, the top of the plate ring type tension sensor is fixedly provided with a synchronous oil column, and the top of the tension sensor is fixedly connected with a display screen; the device has the beneficial effects that through the design of a plate ring type tension sensor structure, a top block, a display screen, a top block, an oil pipe groove and an oil inlet, clamping stress can be observed conveniently, screwing-on and screwing-off operation is assisted, damage caused by strong clamping of an oil pipe is reduced, in addition, polyurethane rubber and copper alloy inserts are arranged on the side faces of the semicircular clamping blocks, skid resistance can be achieved, and the service life of the oil pipe is prolonged. The clamping and fixing capacity is enhanced, damage of the clamp teeth to the oil pipe is eliminated, and the working efficiency of the oil pipe clamp is improved.

The utility model belongs to the technical field of connecting wires, and particularly relates to an anti-interference patch type connecting wire, which comprises an insulating body, a battery core wire and connectors at two ends, the battery core wire comprises six copper alloy core wires, the six core wires are linearly arranged in the connectors at equal intervals, and the distance between the core wires is 1.27 mm so as to realize high-density connection. The pins are arranged on the connectors and connected with the two ends of the battery core wire, the pins are of trapezoidal structures, the lower portions of the pins are wide, the upper portions of the pins are narrow, the contact area between the pins and a circuit board bonding pad can be increased conveniently during welding, the battery core wire is wrapped in the insulation body, the shielding layer is further wrapped outside the battery core wire, electromagnetic interference is reduced, and the heat dissipation structures are arranged on the connectors and the insulation body. According to the connecting line, the connection density is improved, the requirements of miniaturization and integration of electronic equipment are met, the space of a circuit board can be effectively saved, the connection is stable and reliable, and the problems of looseness, unsoldering and the like are effectively prevented.

The application belongs to the field of copper alloy friction, and particularly relates to a heterogeneous layered copper-copper zinc alloy with friction anisotropy and a preparation method thereof. The method comprises the following steps: step (1), mechanical polishing of copper plates and copper zinc alloy plates; step (2), organic oil removal; step (3), alternately stacking the copper and the copper zinc alloy, and diffusion welding to form a copper-copper zinc material blank; step (4), cold rolling of the blank at room temperature with a total deformation of 88% to 98%; and step (5), annealing of the rolled blank in an argon stream at 300 DEG C to 350 DEG C for 3 to 4 hours to obtain the copper-copper zinc alloy. The copper / copper zinc alloy with different layer spacings obtained by the application can be used to study the relationship between the layer spacing and the friction anisotropy by adjusting the layer spacing, thereby providing a criterion for designing a heterogeneous layered alloy with excellent tribological properties.

This invention relates to the field of alloy technology, specifically disclosing a microalloyed copper alloy tube and its preparation process. The copper alloy tube is composed of the following components by mass percentage: Ni 0.05%-0.15%, Sn 0.05%-0.15%, Fe 0.01%-0.1%, P 0.02%-0.04%, with the balance being Cu and unavoidable impurities. The mass ratio of Sn to Ni is controlled between 0.5 and 3. It possesses a single face-centered cubic α-phase crystal structure, with an isometric grain ratio ≥85% in the microstructure and an average grain size of 10-20 μm. The preparation process achieves a three-dimensional strengthening effect of solution treatment, precipitation, and grain refinement. The product exhibits a tensile strength of 250-270 MPa, an elongation after fracture ≥45%, and a yield strength ratio of 0.32-0.36, combining high strength, low yield strength ratio, excellent machinability, and corrosion resistance. It is energy-efficient and easily mass-produced.

The invention relates to the technical field of metal manufacturing equipment, and particularly discloses a feeding device of a silver-copper alloy contact re-pressing machine, which comprises a workbench, and further comprises a feeding mechanism movably mounted on the upper surface of the workbench; and the precision control mechanism is fixedly mounted in the feeding mechanism. According to the feeding device of the silver-copper alloy contact re-pressing machine, the feeding operation of a contact blank can be automatically completed through the arranged feeding mechanism, the problem that the production efficiency is not high due to the fact that manual filling needs to be frequently used in traditional equipment is solved, meanwhile, the production safety is greatly improved, and the feeding device is of an independent structure and is convenient to operate. The automatic feeding device is simple in structure and capable of automatically matching with different production lines, applicability of the automatic feeding device is greatly improved, meanwhile, contact blanks are fed into a mold after preparation is completed, automatic continuous production efficiency of the automatic feeding device is greatly improved, and the problem that defective products are generated due to the fact that excessive contact blanks are fed at a time when a leakage groove is opened is solved.

The application discloses a hot isostatic pressing diffusion connection synchronous aging treatment method for high-temperature alloy and copper alloy, relates to the field of dissimilar metal solid-phase welding, and can improve the strength of the high-temperature alloy, inhibit size distortion caused by stress change in the aging process, improve machining precision, shorten the process cycle of finished products and greatly improve production efficiency. Step 1: high-temperature alloy with a predetermined structure is prepared, and solid solution treatment is carried out; step 2: copper alloy with a predetermined structure is prepared, the surfaces of the high-temperature alloy and the copper alloy are polished smooth and cleaned; step 3: the copper alloy and the high-temperature alloy structure are attached to the surfaces to be connected, and vacuum sealing is carried out; step 4: the structure after sealing is sent into a hot isostatic pressing furnace to carry out hot isostatic pressing diffusion connection and in-furnace aging treatment, so that a final product is obtained. According to the hot isostatic pressing diffusion connection synchronous aging treatment method, the strength of the high-temperature alloy is improved, size distortion is inhibited, machining precision is improved, the process cycle of finished products is shortened, and production efficiency is improved.

The invention discloses a copper-tungsten alloy waste cleaning and recycling method based on hydrogen reduction, belongs to the technical field of non-ferrous metal waste cleaning metallurgy and resource circulation, and aims at solving the problems that a traditional recycling method is high in energy consumption, complex in process, heavy in secondary pollution, difficult to consider both the metal recycling rate and the metal purity, large in high-temperature operation safety risk and the like. According to the method, the tungsten-copper alloy waste is sequentially subjected to primary crushing, oxidation, primary reduction, separation, secondary reduction, screening, tertiary reduction, secondary crushing, airflow pulverization, acid pickling and impurity removal and other procedures, cooperative operation is carried out in cooperation with special equipment such as an oxidation reaction tank and a reduction reaction kettle, and meanwhile mixture separation and a hydrogen internal circulation system are integrated; efficient cleaning, separation and extraction of tungsten and copper are achieved, and the energy utilization and resource circulation level is improved. Tungsten and copper are separated thoroughly, the product purity is high, energy consumption is low, the metal recovery rate is high, no three wastes are discharged in the whole process, the green low-carbon circular economy concept is met, the recovery rate of the obtained tungsten powder and copper powder is larger than or equal to 99%, the oxygen content is smaller than 0.05 wt%, and the particle size uniformity is excellent.

Disclosed is a metal particle that includes a basal phase that contains Sn, an Sn—Cu alloy and Sb; and an intermetallic compound crystal that contains Sn, Cu, Ni, Ge, Si and Ti, included in the basal phase, the metal particle has a chemical composition given by 0.7 to 15% by mass of Cu, 0.1 to 5% by mass of Ni, 0.1 to 14% by mass of Sb, 0.001 to 0.1% by mass of Ge, 0.001 to 0.1% by mass of Si, 0.001 to 0.1% by mass of Ti, and the balance of Sn; the basal phase has a chemical composition given by 85 to 99.9% by mass of Sn, 5% by mass or less of Cu, and 0.1 to 14% by mass of Sb; and, at least parts of the basal phase and the intermetallic compound crystal form an endotaxial joint.

This invention provides a method for manufacturing ultrafine copper alloy wires that are highly conductive and high-strength, at a low cost. It also provides ultrafine copper alloy wires with high conductivity and high strength obtained by this low-cost manufacturing method, and cables having such ultrafine copper alloy wires. [Solution] An ultrafine copper alloy wire 11 containing 1% by mass or more of silver and having an outer diameter of 0.10 mm or less is manufactured by a casting process in which molten copper alloy is cast to produce a wire-shaped casting material, a primary wire drawing process in which the casting material is drawn to produce a drawn wire, an intermediate annealing process in which the drawn wire produced in the primary wire drawing process is annealed, a secondary wire drawing process in which the drawn wire produced in the intermediate annealing process is further drawn to produce a small-diameter drawn wire, and an electro-annealing process in which the small-diameter drawn wire is electro-annealed.

This invention discloses a forging apparatus for producing tungsten-copper alloy rods, belonging to the field of forging technology. It includes a forging mechanism, a billet clamping mechanism, an oxidation protection mechanism, and a mechanically linked drive mechanism. This invention achieves cross-mechanism coordination through the drive mechanism. Specifically, a crank press is used as the sole power source, and its up-and-down forging action synchronously drives the connecting frame, linkage rod, and transmission gear, thereby meshing and driving the clamps of the billet clamping mechanism to expand and contract synchronously. Simultaneously, it drives the oxidation protection mechanism to synchronously complete scale removal and lubrication, thus fundamentally avoiding defects such as delayed scale removal, incorrect lubrication timing, and scale indentation.

This invention discloses a laser-based dynamic balancing device for an EC motor rotor, belonging to the field of laser cutting technology. It includes a frame module, a chuck module, and a balancing module. Two sets of chuck modules are mounted on the frame module to clamp the rotor from both ends of the rotor shaft. The balancing module is movably mounted on one side of the frame module. Each chuck module includes a hollow shaft cylinder and a shaft disc. The shaft disc is rotatably mounted at one end of the hollow shaft cylinder. Several support layers are slidably mounted on the shaft disc along the circumferential direction. Clamps are mounted on the inner diameter ends of the support layers. This invention uses the two sets of chuck modules in the frame module to center and clamp both ends of the EC motor rotor shaft, preventing rotor misalignment. A heat insulation layer is provided between the support layers and the clamps to block heat. The high thermal conductivity copper alloy clamps, combined with the coolant flow channel, efficiently exchange heat, maintaining the shaft at a low temperature and reducing magnet demagnetization.