182 results about "Copper–tungsten" patented technology

A golf putter head of triangular shape. A ball-striking leading wall has a first breadth greater than a second breadth of a trailing wall. The leading and trailing walls are interconnected at their respective opposite ends by sidewalls that converge toward one another. A web interconnects the leading and trailing walls along a longitudinal axis of the golf putter head. A first embodiment may include a trailing copper weight and side wall aluminum weights. A second embodiment may include three copper weights, a third embodiment may include three copper-tungsten weights, and a fourth embodiment may include three tungsten weights. The weights are removable so that a putter having a low swingweight or a high swingweight can be brought up to or down to a standard swingweight. The weights may also be mixed in the second, third, and fourth embodiments.

The invention relates to a spherical copper coating tungsten composite powder, a preparation method and an application thereof. The copper coating tungsten composite powder is in a core-shell structure, the shell is a copper plating layer, the core is tungsten powder, and the weight ratio of the tungsten elements and copper elements of the copper coating tungsten composite powder ranges from 5 to 95 : 95 to 5; the spherical copper coating tungsten composite powder has the advantages of fine dispersion performance, high liquidity, even ingredients and high purity. The preparation method includes processing ordinary tungsten powder by a plasma spheroidizing technology, allowing the copper to deposit on the surface of the tungsten powder evenly by the intermittent copper electroplating process, and cleaning and drying the composite powder coated with copper. The spherical copper coating tungsten composite powder is prepared by combining the plasma spheroidizing and intermittent copper electroplating, the method is simple, reliable and easy to operate, the electroplating speed, the electroplated layer thickness and copper content range can be adjusted effectively, the copper-tungsten composite material comprehensive performances can be improved effectively, the expanded application prospect is provided, and the method can be applied to industrialized mass production.

The invention discloses a method for preparing a copper-tungsten contact material by discharge plasmas. The method comprises the following steps: 1, pouring tungsten powder into a graphite die, placing the graphite die into a plasma sintering furnace, performing vacuumizing and boosting, connecting the sintering furnace with pulse direct current, heating to 1,320 DEG C to 1,480 DEG C, preserving the heat for 2.5 to 5 min, and naturally cooling the graphite die in the furnace to obtain tungsten framework; 2, polishing a copper block, performing ultrasonic cleaning the copper block until the copper block is cleaned, irradiating and scanning the copper block with laser at the speed of 10 to 500 mm/s, and performing plasma treatment to obtain an infiltrating copper block for later use; 3, putting the tungsten framework into a graphite boat, placing the infiltrating copper block on the tungsten framework, filling the space around the copper block with alundum powder, putting the tungsten framework into a high-temperature sintering furnace with protective gas atmosphere, heating to 1,300 DEG C to 1,400 DEG C, and preserving the heat for 2 to 3 hours to obtain a copper-tungsten sintered body; and 4, performing vacuumizing hot pressing on the copper-tungsten sintered body under conditions that the pressure is 50 to 100 MPa and the temperature is 800 DEG C to 850 DEG C, and cooling to room temperature to obtain the copper-tungsten contact material.

A method for preparing tungsten-copper or molybdenum-copper high-voltage contact materials by direct forming. Firstly, the raw material powder is uniformly mixed according to the composition ratio of the high-voltage contact, and then the mixed raw material powder is input into the powder feeding system of the cold spraying system. Or spraying with heated gas, under the action of high-pressure gas, the raw material powder collides with the copper substrate to undergo plastic deformation, and then deposits on the surface of the copper base to form a high-voltage contact material, and finally the formed tungsten copper or molybdenum copper high-voltage contact material Use directly or after annealing at 1000-1400°C for 30-60 minutes. The invention simplifies the process, overcomes the high-temperature deformation of the copper base, distributes the copper solidified phase finely and uniformly, reduces the equipment cost of cold spraying, improves the safety of the working process, is suitable for online processing, and saves spraying cost.

The invention relates to a rapid preparation method of a copper-tungsten alloy, and belongs to the fields of a powder metallurgy technology, a metallurgical new technology and a microwave sintering technology. The method comprises the following steps: carrying out ball milling mixing of metallic tungsten powder and copper powder according to a proportion ratio of 95-70wt%:5-30wt%, carrying out briquet pressing to prepare a tungsten skeleton briquet, filling into a mullite crucible, distributing the copper powder surrounding the tungsten skeleton briquet, putting the crucible under conditions comprising a microwave frequency of 2400-2500MHz, a power of 3-5KW and a degree of vacuum of below 0.1KPa, sintering for 1-3h by heating to 1100-1300DEG C at a heating speed of 15-20DEG C/min, and naturally cooling to obtain the copper-tungsten alloy. The copper-tungsten alloy prepared through the method has a uniform structure and a compact structure, and has a relative density reaching 98.7%.

The invention provides a tungsten carbide welding rod and a tungsten carbide welding wire, which comprise a strip-shaped or filate tubular sheath and filler which is filled in the tubular sheath and comprises tungsten carbide powder. The tubular sheath contains over 50 percent of copper element; a welding temperature of the copper tungsten carbide welding rod or the welding wire is lower, so that the tungsten carbide is effectively prevented from being decomposed while overlaying, and wear-resisting property of the tungsten carbide is kept; the tubular sheath contains the copper, and the tungsten carbide is easy to wet, so that the bonding strength of the tungsten carbide and an overlaid base metal is effectively improved, the possibility that the tungsten carbide is fallen off is reduced when an overlaying part is under a using condition, and a wear-resistant part is prevented from becoming invalid; and the tungsten carbide welding rod and the tungsten carbide welding wire are widely applied to overlaying of a wear-resistant surface, particularly on-site remediation.

A blue LED epitaxial wafer grown on an Al₂O₃ substrate, the blue LED epitaxial wafer having a contact electrode on the bottom side after removal of the Al₂O₃ substrate, conducting terminals formed on the top side, and a substitute substrate selected from chrome, tungsten, molybdenum, copper, copper chrome alloy, copper molybdenum alloy, copper tungsten alloy, molybdenum tungsten alloy, or their combination alloy and bonded to the top side and connected to the conducting terminals.

The invention discloses a preparation method of joining elconite and copper trail integral electrical contacts; it adopts method of adding copper-tungsten alloy buffer layer between copper-tungsten alloy and copper or copper alloy copper trail to realize the integral connection, firstly getting 23.6-41.2% copper powder and 58.8-76.4% tungsten powder as percentage by weight, and nickel powder which is about 0.05-0.15% of the total weight and 0.5-1.5%ml alcohol; The buffer layer material is placed at the bottom of the die, and the copper-tungsten alloy mixture is placed to pressed forming; at last the transition material bedding surface of the moulded blank and the copper or copper alloy surface which is to be connected are placed contactly, it then adglutinated as a whole. The preparation method of the invention not only improve the conjunction strength of copper-tungsten alloy and copper, copper-tungsten alloy and copper alloy integral electrical contacts, at the same time, the conductivity of integral electrical contacts is also improved.

The invention is concerned with the electrode alloy pyroelectricity device of the cobalt antimonide pyroelectricity device and it's making method. It includes the Cu-W alloy electrode with the W quality percentage 20% to 30%; the rest components are copper and unavoidable impurity; the optimized Cu75W25 electrode hot coefficient of expansion (CTE) and the CoSb3 pyroelectricity are in right hot matching with difference no more than 9.8%. The component making applies the transition layer of the metal Ti, granularity about 20-50mum, and the discharge plasma sintering (SPS) method to achieve the connection of the Cu-W alloy electrode and the pyroelectricity. Because of the high conductivity and the thermal conductivity of the copper tungsten alloy and it is matching with the CoSb3 pyroelectricity material rightly, the invention is with the quite stable surface with no obvious composition plane electrode transition, keeps the making method simple.

An alloy material of Cu-tungsten carbide-C-Ti-RE is consists of Cu, WC, C, Ti, rare-earth. The material decrease the content of the 'WC' and increase the content of 'Cu' so improve the conductance, as a result, it can control the temperature of the material. The material which added proper C and Ti, RE can improve the non-fusibility, wearability, arc resistance, life of the electricity. The process can improve the fine structure of the histology so the material can be used from the high-current switch, circuit breaker to majority medium-current switch. Especially, it can save the silver and have good market future.

The invention discloses a preparation method of mechanical alloying copper-tungsten alloy powder. Atomized copper powder and crystallized tungsten powder are selected as raw materials; a ball milling medium, in particular a volatile organic solvent as the ball milling medium is added for wet grinding; the wet grinding enables powder grains to be fine; the components are uniform; the powder oxidized degree is reduced; the increment of forming density is facilitated; a mechanical alloying method with a high ball-material ratio is adopted, so that tungsten particles are embedded in copper particles through high-energy collision under the condition of normal temperature to form supersaturated solid solution alloy powder; and finally, the ball milling medium is removed to obtain the mechanical alloying copper-tungsten alloy powder. The tungsten-copper alloy powder, obtained by the method, has such characteristics as larger particles, uniform components, excellent forming capacity, excellent flowing performance, easy formation and easy segregation; and the preparation method is simple in process and easy to operate.

This invention provides an electric spark processing method for sealing grooves of an aero engine guide vane. The method comprises the following steps: (1) two copper-tungsten alloy blocks are fixed on an electrode pedestal and are processed into two electrodes by adopting a milling mode, wherein the two electrodes have the shapes same as and the positions matching with those of the sealing grooves, formed in large and small margin plates of the guide vane, to be processed respectively; and (2) the two electrodes are placed aligning to the parts, to be processed, of big and small margin plates of the guide vane respectively, an electric spark processing machine is started to ensure that the two electrodes carries out electric spark processing on the parts to be processed in the depth direction of the sealing grooves; the two electrodes are aligned to a next part to be processed after processing of the sealing groove of the processed surface is finished, and processing continues according to the process conditions until all the sealing grooves, in the same type, formed in the guide vane are processed; and after the electrodes wears, the two copper-tungsten alloy blocks which are fixed on the electrode pedestal are reprocessed into electrodes by using the milling mode, and then the sealing grooves are continuously processed.

The invention discloses a surface clad layer treatment method of a copper tungsten electrical contact material for an arc extinguish chamber. The method includes the steps that the copper tungsten alloy contact material is prepared to serve as a substrate material; mechanical buffing, washing and drying are carried out; the substrate material is placed into a vacuum chamber to deposit a chromium layer, a nickel layer or a titanium layer on a base body through a chromium target, a nickel target or a titanium target under the argon atmosphere; a copper target and a tungsten target are used for codeposition of a copper-tungsten clad layer on the substrate deposited with the chromium target, the nickel target or the titanium target continuously, and a copper tungsten-tungsten clad layer with a certain film thickness is obtained; and annealing is carried out under protection of a mixed atmosphere of inert gas and hydrogen, furnace cooling is carried out, a sample is taken out, and a copper tungsten electrical contact material surface clad layer is obtained. By means of the two-phase nanoscale uniform distributed structure, the ablation uniformity can be greatly improved, the ablation pit depth is reduced, and the service life is prolonged; meanwhile, a provided nanocrystalline tungsten framework can improve the arc ablation resistant capacity. By means of the method, equipment is simple and convenient to operate, the effect is obvious, and the good industrial application prospect is achieved.

The invention provides a method for preparing monoclinic system tungsten trioxide from copper-tungsten alloy waste as a raw material. The method comprises steps as follows: acid leaching, roasting, ammonification and acidolysis. The copper-tungsten alloy waste is taken as the raw material, a high-value product monoclinic system tungsten trioxide with a function of photocatalytic degradation of organic matter is prepared, cyclic utilization of the waste metal resource is realized, renewable energy sources (solar energy) can be utilized, a recycled product can be used for environmental pollution control, and national energy saving, environmental protection and resource recycling strategies are met. According to the preparation method, the raw material is easy to obtain, the cost is low, a process is simple, and the preparation method is suitable for industrial production.

The invention relates to electrochemical discharge mechanical milling composite machining tool cathode and a using method, and belongs to the field of electrolytic electric spark mechanical compositemachining. A tool cathode material is a copper-tungsten alloy, a workpiece is a conductive material, an electrolyte is a salt solution with relatively high conductivity, a common direct-current powersupply is adopted for power supply, and insulating blades are welded at the bottom of the tool. During machining, the electrolyte enters a machining area from the side wall of the tool cathode, an electrochemical anode of the workpiece material is dissolved, and a discharge channel is formed between the tool cathode and the workpiece through a small machining gap; the rotation of the tool cathoderealizes the transfer of discharge points, so that the electrolysis effect and the electric spark effect are combined to remove the material, the material removal rate is remarkably improved, due to the milling effect of the blades at the bottom of the tool, a machined bottom surface can be leveled, and the flatness of the machined bottom surface is improved. The tool can realize high-efficiency and high-precision machining of metal materials which are difficult to machine.

The invention provides a preparation method of a copper/graphite film multi-layer laminated blocky composite material, which can be applied in the field of electronic packaging of an integrated circuit industry. The raw materials of the composite material adopt an anisotropic high-thermal-conductivity net-shaped graphite film and electrolytic pure copper powder. The preparation method comprises the following steps: adding the copper powder into a uniformly mixed solution of an adhesive prepared from polyvinyl butyral and an ethanol solution as well as dimethyl phthalate serving as a plasticizer, completely stirring to obtain uniform slurry with high flowability, spreading the slurry on the net-shaped graphite film uniformly, drying, cutting, degumming, superposing layer by layer, and performing bidirectional pressurizing and sintering to prepare the compact multi-layer laminated blocky composite material with the graphite film and metal copper which are arranged alternately in a layered mode. The heat conductivity of the composite material along the plane direction of the graphite film is 1.5 to 2 times higher than that of pure copper, the density can be reduced to be 65 to 80 percent of the density of the pure copper, and the composite material can be used for replacing the traditional copper tungsten metal heat-conducting material.

The invention discloses a copper-tungsten composite material with a microscopic oriented structure and a preparation method thereof. The composite material is prepared from tungsten and copper of massfraction being 30-97%. The microscopic oriented structure shows that tungsten and copper are arranged in a lamellar pattern along a specific direction at intervals. The copper-tungsten composite material with the microscopic oriented structure is prepared by the technical process of slurry preparing, freeze casting, vacuum freeze drying, organic matter removing, sintering and skeleton infiltrining, and the tungsten content of the material can be controlled by compressing a billet body or a skeleton along the direction vertical to a lamella. The composite material has the mechanical and functional properties of anisotropy and particularly has the characteristics of high strength, high hardness, good electrical and thermal conductivity and good resistance to arc ablation and resistance to electrical shock along the lamella direction. The composite material is expected to be used as an electrical contact material so as to significantly improve the using effect, prolong the service life,reduce component quality and reduce energy consumption.

The invention discloses a mixed dispersion enhanced copper-tungsten-chromium electrical contact material and a preparation method thereof. The preparation method comprises the following steps of mixing an ultrasonically dispersed graphene oxide suspension with copper-aluminum powder, cuprous oxide powder, tungsten powder, chromium powder, cerium oxide powder and yttrium oxide powder, carrying outball milling, freezing and drying on the mixture, and carrying out vacuum hot-pressing sintering to obtain the copper-tungsten-chromium electric contact material. According to the electric contact material, the graphene oxide and the rare earth oxide are added into the copper-aluminum-tungsten-chromium mixed powder, the vacuum hot-pressing sintering - simple internal oxidation process are carriedout, so that the defects of poor affinity and interface binding force between graphene and copper matrix and poor conductivity of graphene oxide are overcome, and the comprehensive performance of thedispersed copper-tungsten-chromium electrical contact material is improved by the reduced graphene oxide under the vacuum high-temperature condition; and in addition, due to addition of the rare-earthcerium oxide and the yttrium oxide, the crystal grains of the contact material can be effectively refined, the strength and the hardness are improved, the electric arc ablation is reduced, the anti-fusion welding performance of a contact is improved, and the comprehensive performance is improved remarkably.

The invention relates to a method for preparing copper-tungsten alloy powder. According to the method, a copper sheet is used as an anode, a noble electrode is used as a cathode, sodium tungstate solution is used as anodic solution, solution with pH ranging from 0 to 14 is used as cathodic solution, electrolyzation is performed under the constant current 1-100mA/cm<2> or constant voltage 10-300V, the sodium tungstate solution is electrolyzed with a cation membrane, a product obtained is cleaned and dried so as to obtain copper-tungsten compound precursor, and the copper-tungsten compound precursor is subjected to high temperature reduction in the hydrogen atmosphere so as to obtain copper-tungsten alloy powder. The method has the advantages that the uniformity problem of the copper-tungsten alloy powder is solved, preparation time, especially that of the precursor, is greatly shortened, and the copper-tungsten alloy powder obtained is pure.