42 results about "Copper high" patented technology

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 light-mass and high-strength aluminum magnesium copper high-entropy alloy and a preparation method thereof. A component atom formula of the designed high-entropy alloy is AlxMgyCuzZnvSiw, wherein x+y+z+v+w=100, x=55-90, y=7-35, z=1-5, v=1-5, and w=0.3-1. A phase structure relating to the alloy uses face center cubic (FCC) solid solution as a main material. The inventionfurther provides the preparation method of the AlxMgyCuzZnvSiw high-entropy alloy; an alloy cast ingot is prepared by vacuum inductive smelting and direct casting; no pollution is generated in the preparation process; the energy consumption is low; the cost is low; and the preparation of the light-mass massive high-entropy alloy becomes possible.

The invention relates to a method for molding a via hole of a printed circuit board, which comprises the steps of: film attachment, in which the surfaces of upper and lower surface copper layers of an insulating dielectric layer drilled with the via hole are attached with photosensitive films, and the positions, which correspond to the via hole, on the photosensitive films are provided with film openings; hole-sealing electroplating, in which an orifice end, which is near a first surface, of the via hole is closed through a copper electroplating process on the first surface of the insulating dielectric layer; hole-filling electroplating, in which the via hole is completely filled with copper, and the filled copper is connected with the surface copper layer of a second surface of the insulating dielectric layer, namely the connection of solid via holes between upper and lower adjacent line layer patterns is realized; and the post-treatment, in which the two surfaces of the insulating dielectric layer are subjected to subsequent treatment respectively, and a level conducting surface which is convenient for implementing subsequent pattern line production working procedures is obtained by removing the photosensitive films, removing the filled copper higher than the surface copper layers, and leveling the board surface. The method has the advantages of simple, convenient and feasible process, low cost, and small area occupation, and upper and lower corresponding line rackets of the hole are integrally preserved, are not damaged by the via hole and have good electrical properties.

The production process of high precision semi-hollow pure copper section bar includes extruding V-shaped blank in V-shaped hot extruding mold at about 850 deg.c and cold drawing in combined mold withlocating slot and core rod having hem. The V-shaped hot extruding mold has opening larger than that required in producing C-shaped section bar, and the combined mold is combined structure of separated core mold and outer mold with hem to make the blank enter to the mold cavity smoothly for homogeneous deformation. The drawn head is forged into size smaller than the aperture of the outer mold for penetrating through and is clamped with a clamp for drawing out to obtain finished product. The said method can produce section bar with precise and stable size and high strength in high yield.

The invention discloses a distribution transformer coil material identification method. The distribution transformer coil material identification method comprises the following steps of 1, respectively preparing pure copper high-voltage and low-voltage standard coils, pure aluminum high-voltage and low-voltage standard coils, and copper-aluminum high-voltage and low-voltage standard coils having 50% copper content and 50% aluminum content, 2, connecting the three high-voltage standard coils and the three low-voltage standard coils to a heating circuit of a distribution transformer to be detected and carrying out heating simultaneously, 3, connecting the three high-voltage standard coils, the three low-voltage standard coils and the distribution transformer to be detected to a direct-current circuit in series, synchronously carrying out gradual cooling, and carrying out real-time acquisition on direct-current resistance values of the high-voltage and low-voltage standard coils, and high-voltage and low-voltage coils of the distribution transformer to be detected, and 4, comparing the direct-current resistance values and recognizing materials of the high-voltage and low-voltage coils of the detected distribution transformer. The distribution transformer coil material identification method has simple processes, is convenient for operation, is operated under the same environmental conditions, has high identification accuracy and is suitable for on-site application.

Provided is a determination method for cobalt content in high-copper high-iron cobalt ores. The method comprises the following steps: (1) taking 0.0100 to 0.2500 g of cobalt ores to prepare an ore sample solution; (2) adding a mixed acid solution into the ore sample solution, and carrying out heating to prepare a shielding iron ore sample solution; (3) removing copper to obtain a copper removal solution; (4) carrying out chromogenic treatment on the copper removal solution to obtain a solution to be determined; (5) preparing a blank solution; (6) preparing a standard solution; (7) drawing a standard curve, and determining cobalt content in the solution to be determined based on the standard curve, thereby determining cobalt content in the a sample of cobalt ores. The method provided in the invention can be used for determining copper- and iron-rich cobalt ores which contain 5 to 35% of Fe, 15 to 30% of Cu and 0.001 to 5% of Co. In the process of determination, no toxic reagents are used, and a treating process is simple and is easy to popularize.

The invention relates to a welding method, in particular to a copper aluminum welding method. The invention mainly solves the problems in the prior art that the technology is complex, the cost is high, and a third metal is required as a connecting metal to realize the copper aluminum welding. And the invention provides a copper aluminum welding method of simple operation, low cost, fast and firm welding. The technique proposal of the invention is as follows: the steps of the copper aluminum welding method comprise: the contacted copper and aluminum is respectively heated by a heating device simultaneously at different temperature, with the temperature applied to the copper higher than that to the aluminum; when the heating time is over 0.5 seconds, the copper aluminum welding is finished.

The invention discloses a manufacturing method of a thick-copper high-density interconnected printed board. The method comprises the following steps of: manufacturing a blind hole windowing pattern ona production board, removing a copper layer at the windowing position by etching, and drilling a blind hole at the windowing position by using laser; drilling a plug hole in the production board after a film is removed, and then metallizing the blind hole and a plug hole; manufacturing a hole plating pattern on the production board, and thickening hole wall copper layers of the plug hole and theblind hole through electroplating; filling the plug hole and the blind hole with resin ink and performing curing after the film is removed, and flattening the board surface through a grinding plate; manufacturing a mask hole pattern on the production board, and thinning the thickness of the surface copper layer through micro-etching; flattening the board surface through the grinding plate after the film is removed; drilling a through hole and a through groove in the production board, and then metallizing the through hole and the through groove; and sequentially subjecting the production boardto subsequent processes, thus obtaining the thick-copper high-density interconnected printed board. According to the method, manufacturing of large-aperture blind holes and thick-copper high-density interconnected printed boards is achieved, and resin is prevented from entering through holes and grooves which do not need hole plugging.

The invention discloses a casting method of a cast iron pan. The method comprises pig iron and copper block smelting, inner pan body workblank casting, roughening, pan body workblank casting, pan bodyworkblank heat treatment, grinding and polishing. Copper high in thermal conductivity is casted into an outer pan body to wrap an inner pan body casted through pig iron, all the positions of the whole inner pan body are evenly heated, the local high-temperature condition is avoided, and lampblack in the use process cannot be generated; and in addition, the cast iron pan is fragile, the copper layer wrapping the outer surface of the cast iron pan achieves the good protection effect, and the anti-breaking capacity of the cast iron pan is improved.

The invention discloses a fluidized bed roaster for treating high-copper high-lead zinc concentrates. According to the fluidized bed roaster, supporting legs are arranged at the lower part of a fluidized bed roaster body; an air bellow is arranged at the position, among the supporting legs, of the lower part of the fluidized bed roaster body; an air blower air supply pipe is connected in the air bellow; a perforated pattern plate is arranged at the upper part of the air bellow; wind caps are arranged on the perforated pattern plate; the upper parts of the wind caps are provided with wind cap upper openings; water jackets are arranged on the periphery of the fluidized bed roaster body at intervals; water jacket air pipes are connected to the water jackets in a penetrating mode and are connected to auxiliary air pipes; the positions, at the lower part of the pattern plate, of the auxiliary wind caps are connected to the auxiliary air pipes through metal flexible connecting parts; the auxiliary wind caps are connected to the upper parts of the auxiliary air pipes and are provided with side openings; and the side openings face the center part of the fluidized bed roaster body. The fluidized bed roaster has the advantages that the auxiliary air pipes are arranged in the air bellow of the fluidized bed roaster body, the water jacket air pipes are additionally arranged at the water jackets, the auxiliary wind caps are additionally arranged, so that the boiling state of materials in the fluidized bed roaster body is good, slagging is reduced, discharging is smooth, and therefore the service life of the the fluidized bed roaster body is prolonged. The fluidized bed roaster is suitable for being used as a high-copper high-lead zinc concentrate fluidized bed roaster.

The invention discloses a low-carbon high-copper high-strength welding wire for gas protection welding, wherein the components of the welding wire are as follows: 0.04 to 0.07 wt% of C, 0.35 to 0.6 wt% of Si, 0.7 to 1.0 wt% of Mn, 0.45 to 0.7 wt% of Cr, 2.0 to 2.4 wt% of Ni, 0.40 to 0.60 wt% of Mo, 0.50 to 0.8 wt% of Cu, 0.01 to 0.05 wt% of Ti, the balance of Fe and inevitable impurities. With the adoption of the welding wire for the gas protection welding provided by the invention, when the MIG (Metal Inert-gas Welding) welding is adopted, the welding arc is concentrated and stable; a weld microstructure is a mixed microstructure of low-carbon equivalent acicular ferrite and bainite; a little dispersive retained austenite exists in the microstructure, thus being beneficial to the improvement of cold cracking resistance performance of weld metal; and in addition, the yield strength of deposited metal is more than 735MPa and the ballistic work is more than 60J at the temperature of -50 DEG C.

The invention relates to the field of crystal resonators, and discloses a process for producing a tuning fork quartz crystal resonator. The process comprises the following steps of: electroplating a sintered substrate which is not electroplated to obtain a tin copper high-temperature-resistant substrate, electroplating a stamped shell which is not electroplated to obtain a nickel-plated high-temperature-resistant shell, melting high-temperature-resistant soldering tin by using a hot air gun to weld a tuning fork wafer on a high-temperature-resistant support, adjusting the tuning fork wafer to the frequency point which is required by the tuning fork wafer by a frequency adjusting process, sorting by a high-temperature aging process, and performing surface mount type packaging to obtain a product. Due to the adoption of the technical scheme, the using range of the tuning fork quartz crystal resonator is widened.

The invention discloses a preparation method of an organic-inorganic ferroelectric polymer composite film. The method comprises the following steps: by taking a graphene/copper high-index surface with one-dimensional periodic potential on the surface as a substrate, uniformly dissolving vinylidene fluoride-trifluoroethylene copolymer (P (VDF-TrFE)) powder in a tetrahydrofuran organic solvent, then adding a ground single crystal lead titanate (PbTiO3) mesoporous material, fully stirring, spin-coating a proper amount of solution on the substrate, and drying to obtain the graphene/copper composite mesoporous material. And carrying out vacuum drying and annealing treatment to obtain the organic-inorganic ferroelectric polymer composite film. The composite film prepared by the method is good in orientation, shows excellent ferroelectric properties, and has wide application prospects in flexible energy transducers, sensing devices and ferroelectric storage devices.

The invention provides a roasting treatment method for high-lead, high-copper and high-iron zinc concentrate. The roasting treatment method comprises the following steps that S1, the high-lead, high-copper and high-iron zinc concentrate is mixed with a binder and granulated, and then drying is carried out to obtain zinc concentrate granules; S2, the zinc concentrate granules are added into a fluidized bed roaster or a fluidized bed to be subjected to oxidizing roasting treatment, and a roasted product is obtained; and S3, the roasted product is fed into a hydrogen reduction furnace for selective reduction, zinc ferrite in the roasted product is reduced into ZnO and Fe3O4, and a reduction product is obtained. According to the roasting treatment method for the high-lead, high-copper and high-iron zinc concentrate, the problem of roasting bonding of the high-lead high-copper high-iron zinc concentrate is effectively solved, the amount of smoke generated in the roasting process is reduced, and the bed capacity of the oxidizing roasting procedure is improved; and meanwhile, zinc ferrite in the roasted product is effectively converted into soluble zinc, and the roasted product meets the requirements of the subsequent wet leaching process.

The invention relates to a low-copper high-molybdenum ore collecting agent and a preparation method thereof. The low-copper high-molybdenum ore collecting agent comprises the following components in parts by weight: 20-25 parts of fractionation-grade kerosene higher than 220 DEG C, 6-9 parts of heavy wax, 2-3 parts of 100/100 motor oil, 1-2 parts of tricyclic aromatic hydrocarbon, and 1-3 parts ofv fatty acid polyglycolate serving as an emulsifier. Fractionation-grade kerosene with the temperature higher than 220 DEG C serves as a main body, a single collecting agent is synthesized into a composite collecting agent in an emulsifying mode, and the collecting agent has the advantages of being simple in preparation method, low in synthesis cost and the like. The collecting agent is good in stability, high in viscosity, high in collecting capacity and capable of effectively improving the recovery rate of molybdenum in the low-copper high-molybdenum ore, has a certain amount of macromolecular aromatic hydrocarbon and easily adsorbs coarse-particle ore.

The invention discloses a uniform continuous iron phase reinforced copper high-speed train brake friction block and a preparation method thereof, and belongs to the field of new materials. The method comprises the steps that firstly, a three-dimensional digital model of a uniform continuous iron phase reinforcement is designed according to the appearance and size of the friction block, then the iron phase reinforcement is prepared through a powder bed melting additive manufacturing system, finally, the iron phase reinforcement is placed in a friction block mold, extrusion casting is combined with molten copper, and the uniform continuous iron phase reinforced copper high-iron brake friction block is obtained. The process is simple, and the continuous iron phase reinforcement of the friction block has the characteristics of continuous and uniform distribution, small stress concentration and difficulty in damage; the performance of the friction block can be effectively regulated and controlled by changing the components of the reinforcements, the shape and the wall thickness of the iron phase reinforcements and the components of the copper matrix, and the requirements of different working conditions are met.