75 results about "Nickel copper alloy" patented technology

The invention provides a low-voltage cable, and relates to the technical field of cables, the low-voltage cable comprises a conductor layer, a support layer, a shielding layer and a sheath layer, the conductor layer is composed of multiple strands of fractal stranded conductors, and each fractal stranded conductor comprises an inner-layer superfine silver-plated copper wire, a middle-layer copper-clad aluminum wire and an outer-layer nickel-plated copper alloy wire; the supporting layer wraps the conductor layer and comprises an inner supporting layer, a dynamic framework layer and an outer restraint layer, the inner supporting layer is an obliquely wound aramid fiber woven belt, the dynamic framework layer is formed by alternately arranging shape memory polymers and carbon fiber composite belts, and the outer restraint layer is a spirally wound silica gel-glass fiber composite rope. The shielding layer comprises a tinned copper wire woven mesh; the sheath layer is a thermoplastic polyurethane matrix, a microcapsule self-repairing agent is dispersed in the thermoplastic polyurethane matrix, a microcapsule comprises a siloxane prepolymer, and the thermoplastic polyurethane matrix further comprises graphene nanosheets. Through collaborative design of the fractal stranded conductor layer, the dynamic skeleton support layer, the shielding layer and the self-repairing sheath, comprehensive improvement of cable performance is realized.

The utility model relates to the technical field of IGBT (Insulated Gate Bipolar Translator) modules, in particular to an IGBT module. The IGBT module comprises a shell, an IGBT chip and an aluminum-based copper-clad plate; the aluminum-based copper-clad plate comprises an aluminum plate, an oxidation film layer, a silicon carbide layer, a nickel-copper alloy layer and a first copper layer, the oxidation film layers are formed on the two sides of the aluminum plate, the silicon carbide layers are formed on the oxidation film layers on the two sides of the aluminum plate, the nickel-copper alloy layers are formed on the silicon carbide layers on the two sides of the aluminum plate, and the first copper layers are formed on the nickel-copper alloy layers on the two sides of the aluminum plate. The IGBT chip is fixedly arranged on the first copper layer of the aluminum-based copper-clad plate, and the shell is fixedly arranged on the aluminum-based copper-clad plate and covers the IGBT chip. The IGBT chip is fixedly arranged on the first copper layer of the aluminum-based copper-clad plate, a ceramic substrate and a copper heat conduction block are not used, a copper layer and a soldering tin layer between the ceramic substrate and the copper heat conduction block are omitted, the cost of the ceramic substrate, the copper heat conduction block and the attaching technology is saved, the cost is low, the technology is simple, the production yield is improved, heat conduction resistance caused by a multi-layer structure is avoided, and the heat conduction efficiency is high.

The invention relates to the technical field of dielectric near-zero materials, in particular to aerogel with radio frequency dielectric near-zero performance and a preparation method and application thereof, and the aerogel comprises polyurethane / high-entropy alloy at carbon (PU / HEA at C) aerogel, polyurethane / copper at carbon (PU / Cu at C) and polyurethane / cobalt nickel copper alloy at carbon (PU / CoNiCu at C) aerogel. Wherein the polyurethane / copper at carbon aerogel and the polyurethane / cobalt-nickel-copper alloy at carbon aerogel show negative dielectric properties at 1M Hz to 110M Hz, the dielectric constant of the polyurethane / high-entropy alloy at carbon aerogel is changed from negative to positive, and the dielectric near-zero performance is achieved near 24M Hz.

The invention discloses a high-flame-retardant temperature-resistant corrosion-resistant optical fiber composite cable and a preparation method thereof, and belongs to the technical field of cable manufacturing, and the high-flame-retardant temperature-resistant corrosion-resistant optical fiber composite cable sequentially comprises an optical fiber unit, a conductor layer, an insulating layer, a shielding layer, a corrosion-resistant layer and a sheath layer from inside to outside. The optical fiber unit adopts a ceramic silicone rubber buffer layer; the conductor layer is a nickel-plated copper alloy stranded wire, and the oxidation resistance is enhanced through nano titanium dioxide sol treatment; the insulating layer is of a three-layer co-extrusion structure; the shielding layer adopts an aluminum-plastic composite belt and tinned copper wire braided composite structure; the anti-corrosion layer is a polytetrafluoroethylene film subjected to plasma treatment; the sheath layer is made of two-component ceramic silicone rubber, is flexible after being vulcanized at normal temperature, and is converted into a ceramic body at high temperature. According to the optical fiber composite cable, through the collaborative design of a multi-layer structure, the performance of excellent continuous use stability, high salt mist environment corrosion resistance and the like is achieved, the optical fiber composite cable is suitable for high-temperature, corrosion, fire and other severe environments, and the safety and durability of the composite cable are remarkably improved.

The invention provides a smelting method of high-manganese nitrogen-controlled copper-containing austenitic stainless steel. The technological process of an electric furnace (EAF), an argon oxygen decarburization furnace (AOD), a ladle refining furnace (LF) and a continuous casting machine (CCM) is adopted. By optimizing the alloy ratio, the molten steel is controlled to comprise the following components in percentage by weight: 0.040%-0.070% of C, 0.20%-0.60% of Si, 5.50%-7.00% of Mn, 3.00%-4.50% of Ni, 16.00%-18.00% of Cr, 0.080%-0.150% of N, 1.50%-2.00% of Cu, 0.0020%-0.0040% of B and the balance of Fe. According to the method, large ferrochrome / slag steel and nickel-copper alloy are adopted in the electric furnace stage to reduce the cost, nitrogen is accurately controlled through nitrogen / argon switching in the AOD stage, and ferroboron microalloying is conducted in the LF stage to improve the casting blank performance. The finally obtained high-manganese high-nitrogen copper-containing austenitic stainless steel has excellent corrosion resistance and cold working performance and can replace SUS304 to be used in the fields of household appliances, decoration and industry, and the purposes of reducing the production cost and improving the market competitiveness are achieved.

The invention relates to the technical field of cables, solves the problem that an existing aerospace cable is insufficient in vibration fatigue resistance and high-energy radiation resistance, and particularly discloses a multi-layer shielding optical fiber composite aerospace cable and a preparation method thereof.The multi-layer shielding optical fiber composite aerospace cable comprises an insulating layer, an inner shielding layer, a buffer bonding layer and an outer shielding layer which are sequentially arranged from inside to outside; a conductor core and an optical fiber bundle are arranged in the insulating layer, and the insulating layer comprises a bonding transition layer, a core insulating layer and an anti-radiation protection layer from inside to outside; the inner shielding layer comprises a nano-silver conductive film and a silicone rubber elastic layer, and the nano-silver conductive film is arranged on the inner side of the silicone rubber elastic layer; the outer shielding layer is provided with a nickel-copper alloy wire woven mesh; and the buffer bonding layer is provided with a modified polyimide adhesive layer. According to the optical fiber composite aerospace cable and the preparation process thereof, the shielding, buffering and interlayer bonding performance of the cable is guaranteed through control over the inner shielding layer, the buffering bonding layer and related preparation parameters, and the optical fiber composite aerospace cable adapts to aerospace application requirements.

The present invention discloses a high-strength, high-toughness and high-wear-resistant nickel-copper-based diamond composite material, its preparation method and application. The composite material comprises 75-95 vol.% of nickel-copper alloy binder phase powder and 5-25 vol.% of diamond powder. The composite material is obtained by weighing the required nickel-copper alloy binder phase powder and diamond powder according to the configured ratio, mixing them by the acoustic resonance method, and then performing hot pressing sintering after pre-pressing deformation. The process flow is simple, the production cycle is short, the production cost is reduced, and it does not involve dangerous operations such as mechanical ball milling method, which is suitable for industrial production. The prepared composite material has high flexural strength, impact toughness and wear resistance at the same time. When used as the raw material of drill tools, working dies and grinding tools, it can significantly improve their wear resistance and extend the service life of each tool.

The utility model discloses a cyanide-free imitation gold plating layer structure of an aluminum alloy part, which comprises an aluminum alloy substrate, and a chemical zinc deposition layer, a citrate pre-nickel plating layer, a nickel-copper alloy plating layer, a bright nickel plating layer, a cyanide-free imitation gold plating layer and an electrophoretic varnish coating which are sequentially prepared on the aluminum alloy substrate from inside to outside. According to the cyanide-free gold-imitating plating layer structure of the aluminum alloy part disclosed by the utility model, the binding force of the plating layer is tested by a thermal shock method according to the GB / T 5270-2005'metal covering layer electro-deposition and chemical deposition layer adhesion strength test method on a metal matrix ', the binding force meets the standard requirement, an acetate fog test is carried out for 168 hours according to the GB / T 10125-2021'artificial atmosphere corrosion test and salt spray test', and the binding force meets the standard requirement. And no red corrosives are generated on the surface of a plated part, and the plating layer structure has good corrosion resistance.

The present invention provides a flexible copper foil substrate comprising: a polyimide base material; the nickel-copper alloy layer is formed on at least one surface of the polyimide base material through chemical plating, the nickel-copper alloy layer at least comprises nickel, copper and phosphorus, the content of the copper is larger than 30 wt% of the nickel-copper alloy layer, the content of the phosphorus is smaller than 5 wt% of the nickel-copper alloy layer, and the thickness of the nickel-copper alloy layer is smaller than 10 micrometers. The corrosion potential of the nickel-copper alloy layer in a 0.02 vol% sulfuric acid solution is greater than-20 mV; and the copper layer is formed on one surface, far away from the polyimide base material, of the nickel-copper alloy layer, and is compounded with the nickel-copper alloy layer to form a metal conductive layer. Moreover, the flexible copper foil substrate has an electrochemical corrosion resistant effect and sufficient peel strength, and is beneficial to manufacturing a flexible circuit board.

The invention discloses a ceramic-based nano-film pressure core body and a manufacturing method thereof, and belongs to the technical field of ceramic piezoresistive sensor core bodies, and the ceramic-based nano-film pressure core body sequentially comprises a ceramic substrate, an interface transition layer, a composite nano-film layer, a gold layer and a doped silicon dioxide protection layer from bottom to top, the composite nano film layer sequentially comprises a nickel-chromium alloy layer and a nickel-copper alloy layer from bottom to top; the interface transition layer is a titanium-aluminum alloy layer deposited on the surface of the ceramic substrate through magnetron sputtering; and the doped silicon dioxide protective layer contains 1 to 3 weight percent of BN, 0.5 to 2.0 weight percent of Ga2O3 and the balance of SiO2. According to the invention, the compatibility between the ceramic and the metal alloy nano-film layer is improved through the interface transition layer, and the insulating property of the core body is improved through the doped silicon dioxide protection layer. The problems that a traditional core body is low in precision, large in temperature drift and poor in insulation are solved, and a high-voltage power system and other harsh scenes are adapted.

The invention provides a preparation method of a nickel-copper alloy. The preparation method comprises the following steps: preparing materials; the method comprises the following steps: firstly, filling part of C and Ni into a vacuum induction furnace, vacuumizing, starting to supply power for melting, and then adding C and Ni in multiple batches and small batches until C and Ni are completely melted; performing refining; al and Ti are added to complete alloying; then Cu is added under the argon atmosphere, and alloying is completed; and vacuum pouring is conducted, and the nickel-copper alloy is obtained. By means of the method, the ultra-pure Monel K-500 alloy ingot can be prepared, meanwhile, the high metal yield is obtained, and efficient utilization of alloy elements is achieved. Results show that the content of N in the alloy ingot is less than 15 ppm, the content of H is less than 3 ppm, the content of O is less than 7 ppm, and the yield of Cu is greater than 98%.

The present invention provides a dissimilar metal welding method for nickel-copper alloy and stainless steel, which belongs to the technical field of dissimilar metal welding and comprises the following steps: cleaning the welding surface of nickel-copper alloy rod and stainless steel hanger; preheating the non-welding end of nickel-copper alloy rod; covering the non-welding area of ​​nickel-copper alloy rod and stainless steel hanger with thermal insulation material; welding the welding area of ​​nickel-copper alloy rod and stainless steel hanger with non-nickel-based alloy welding material; covering the welding area of ​​nickel-copper alloy rod and stainless steel hanger with thermal insulation material after welding; after the temperature of the welding area drops to a preset temperature, removing the thermal insulation material and cleaning the welding slag in the welding area. The dissimilar metal welding method for nickel-copper alloy and stainless steel provided by the present invention does not require the use of nickel-based welding rods or welding wires, and effectively solves the problem of thermal cracking when welding nickel-copper alloy and stainless steel by optimizing the welding process steps and parameters.

To provide a flexible copper clad substrate that has electrochemical corrosion resistance and sufficient peel strength.SOLUTION: Provides a flexible copper clad substrate, which includes a polyimide substrate; a nickel-copper alloy layer; and a copper layer. The nickel-copper alloy layer is formed on at least one side of the polyimide substrate by electroless plating and comprises at least nickel, copper and phosphorus. A content of the copper is more than 30 wt.% of the nickel-copper alloy layer, a content of the phosphorus is less than 5 wt.% of the nickel-copper alloy layer, and a corrosion potential of the nickel-copper alloy layer in a 0.02 vol.% sulfuric acid solution is greater than -20 mV. The copper layer is formed on the side of the nickel-copper alloy layer remote from the polyimide substrate and is combined with the nickel-copper alloy layer to form a metal conductive layer. In addition, the flexible copper clad substrate has electrochemical corrosion resistance and sufficient peel strength, facilitating the production of flexible printed circuit boards.SELECTED DRAWING: Figure 1

The utility model relates to alloy wire production technical field, concretely relates to a kind of nickel-copper alloy wire material surface cleaning cleaning device;It contains water storage frame, water storage frame is equipped with threading rack respectively at two ends, threading hole for wire rod is opened in threading rack, and two groups of symmetrical cleaning components are equipped on the front end of water storage frame, drying assembly is equipped on the rear end of water storage frame;The utility model can flush the two sides of wire rod respectively by the setting of two groups of cleaning components, ensure cleaning effect, and rotating spray head can rotate automatically in the process of spraying, so that water flow angle can change in real time, further enhance cleaning effect;The utility model is through drying assembly, by the mode of high-pressure hot air, water drop is blown down, and a small amount of water adhered is dried, to realize automatic drying after cleaning is completed.

The invention provides a dissimilar metal welding method applied to nickel-copper alloy and stainless steel, and belongs to the technical field of dissimilar metal welding. The dissimilar metal welding method comprises the following steps that the welding faces of a nickel-copper alloy bar and a stainless steel hanging bar are cleaned; the non-welding end of the nickel-copper alloy bar is preheated; the non-welding area of the nickel-copper alloy bar and the stainless steel hanging bar is covered with a heat preservation material; welding the welding areas of the nickel-copper alloy bar and the stainless steel hanging bar by adopting a non-nickel-base alloy welding material; after welding, the welding area of the nickel-copper alloy bar and the stainless steel hanging bar is covered with a heat preservation material; and after the temperature of the welding area is reduced to the preset temperature, the heat preservation material is removed, and welding slag in the welding area is cleaned. According to the dissimilar metal welding method applied to the nickel-copper alloy and the stainless steel, nickel-based welding rods or welding wires do not need to be used, and the problem of hot cracks during welding of the nickel-copper alloy and the stainless steel is effectively solved by optimizing welding process steps and parameters.

The utility model discloses an annealing, scale breaking and descaling device for an N04400 nickel-copper alloy hot continuous rolling plate coil. The annealing, scale breaking and descaling device comprises a rack, a support frame, a scale breaking mechanism, a descaling mechanism and a cleaning mechanism, the supporting frame is located on one side of the machine frame, the scale breaking mechanism is installed on the supporting frame, the conveying rollers are rotationally connected to the machine frame, and the two sets of scale removing mechanisms are installed on the upper side and the lower side of a nickel-copper alloy plate respectively and connected to the supporting frame. The cleaning mechanism is mounted on the rack on one side of the descaling mechanism; the adjusting mechanism is mounted on the rack and is connected with the descaling mechanism below the nickel-copper alloy plate; the pair of supporting arms is symmetrically fixed to the side wall of the supporting frame. According to the utility model, the high-pressure water can impact the broken oxide skin, so that the effect of removing the oxide skin is further achieved; the water spraying angle of the high-pressure nozzle can be adjusted, and the descaling efficiency is improved; cleaning brushes can be distributed in a staggered mode, and oxide skin residues on the surface of the nickel-copper alloy plate are prevented; and oxide skin can be prevented from being clamped on the cleaning brush.

The application discloses a kind of high flame-retardant temperature-resistant corrosion-resistant optical fiber composite cable and preparation method thereof, belong to cable manufacturing technical field, from inside to outside include optical fiber unit, conductor layer, insulating layer, shielding layer, anticorrosive layer and sheath layer in sequence.Optical fiber unit uses ceramicized silicone rubber buffer layer;Conductor layer is nickel-plated copper alloy stranded wire, and oxidation resistance is enhanced by nano titanium dioxide sol treatment;Insulating layer is three-layer co-extrusion structure;Shielding layer uses aluminum-plastic composite tape and plated tin copper wire braided composite structure;Anticorrosive layer is polytetrafluoroethylene film treated by plasma;Sheath layer uses two-component ceramicized silicone rubber, and it is flexible at room temperature vulcanization, and it is converted into ceramic body at high temperature.The application realizes excellent continuous use stability, strong corrosion resistance in salt spray environment and other performances through the synergistic design of multilayer structure, is suitable for high temperature, corrosion, fire and other harsh environments, significantly improves the safety and durability of composite cable.

This invention discloses a method for preparing high-manganese steel plates by hot rolling after surface infiltration of TiC using a lost foam casting process. This invention combines lost foam casting, TiC infiltration, hot rolling, and water quenching. TiC particles are used as the reinforcing phase, and a coating is prepared using a special silica sol refractory binder and sodium-based bentonite suspending agent. Key processes include drying the TiC coating layer, re-drying after applying the lost foam refractory coating, negative pressure casting, hot rolling, and water quenching. Nickel and copper alloying elements are introduced into the matrix to achieve a good match between the infiltrated layer and the matrix. Through the synergistic effect of the components and processes, this invention enables the plate to possess both high surface wear resistance and matrix toughness. The infiltrated layer has a stable bond, and the process is highly controllable, thus improving the performance and service life of high-manganese steel plates under wear-resistant conditions.

The application relates to the technical field of cables, solves the problems of insufficient vibration fatigue resistance and high-energy radiation performance of existing aerospace cables, and specifically discloses a multi-layer shielded optical fiber composite aerospace cable and a preparation method thereof, which comprises, from inside to outside, an insulation layer, an inner shielding layer, a buffer bonding layer and an outer shielding layer; the insulation layer is internally provided with a conductor core and an optical fiber bundle, and the insulation layer comprises, from inside to outside, a bonding transition layer, a core insulation layer and an anti-radiation protection layer; the inner shielding layer comprises a nano-silver conductive film and a silicone rubber elastic layer, and the nano-silver conductive film is arranged on the inner side of the silicone rubber elastic layer; the outer shielding layer is provided with a nickel-copper alloy wire mesh; and the buffer bonding layer is provided with a modified polyimide glue layer. The application is used for an optical fiber composite aerospace cable and a preparation process thereof, the inner shielding layer, the buffer bonding layer and related preparation parameter control are adopted, the cable shielding, buffering and interlayer bonding performance are guaranteed, and the application requirements of aerospace are met.

This invention relates to the field of electromagnetic wave absorbing materials, specifically a method for preparing carbon-coated nickel-copper alloy nanosheets and the corresponding material. The method includes: adding a surfactant to a mixed solution of copper salt, nickel salt, and solvent under an argon atmosphere to obtain a nickel-copper alloy nanosheet solution; adding ethanol to the obtained nickel-copper alloy nanosheet solution for precipitation; centrifuging and washing the precipitate at high speed to dissolve it; ultrasonically dispersing and washing the dissolved solution; vacuum drying the product to obtain nickel-copper alloy nanosheet powder; mixing the powder with a carbon source; grinding the powder to obtain a mixed powder of nickel-copper alloy nanosheets and carbon source; and sintering the powder at high temperature under a protective atmosphere to obtain the carbon-coated nickel-copper alloy nanosheet material. The carbon-coated nickel-copper alloy nanosheet material prepared by this invention achieves excellent electromagnetic wave absorption performance at a relatively thin thickness, enabling the absorption of electromagnetic waves within a very small space.

The present invention provides a low-voltage cable, relating to the field of cable technology, including a conductor layer, a support layer, a shielding layer and a sheath layer, wherein the conductor layer is composed of multiple fractal stranded conductors, the fractal stranded conductors including an inner layer of ultrafine silver-plated copper wire, an intermediate layer of copper-clad aluminum wire and an outer layer of nickel-plated copper alloy wire; the support layer is coated on the outside of the conductor layer, including an inner support layer, a dynamic skeleton layer and an outer constraint layer, wherein the inner support layer is an obliquely wound aramid fiber braid, the dynamic skeleton layer is composed of a shape memory polymer and a carbon fiber composite tape alternately arranged, the outer constraint layer is a spirally wound silicone-glass fiber composite rope, and the shielding layer includes a tinned copper wire braid; the sheath layer is a thermoplastic polyurethane matrix, in which microcapsule self-healing agents are dispersed, the microcapsules contain siloxane prepolymers, and the thermoplastic polyurethane matrix also contains graphene nanosheets. Through the coordinated design of the fractal stranded conductor layer, the dynamic skeleton support layer, the shielding layer and the self-healing sheath, a comprehensive improvement in cable performance is achieved.

The invention discloses a nickel-copper alloy N04400 wide strip coil suitable for steckel mill production and a preparation method of the nickel-copper alloy N04400 wide strip coil. The preparation method comprises the following steps: preparing a plate blank and spraying an anti-oxidation material; the plate blank is preheated at the temperature of 650-720 DEG C and then heated to the temperature of 1130-1160 DEG C, and soaking and heat preservation are conducted; performing high-pressure water descaling; performing reciprocating rolling in a roughing mill to obtain an intermediate billet; the furnace temperature of a coiling furnace is controlled to be 940-985 DEG C in the process of rolling in a reciprocating mode, the finish rolling starting temperature is controlled to be 950-1000 DEG C, the finish rolling temperature is controlled to be larger than or equal to 850 DEG C, and a hot rolled steel strip is obtained; and finally coiling to obtain the hot-rolled black coil. By means of the optimized stepped heating and steckel rolling process, the problems that a traditional method is low in yield and low in efficiency are solved, the manufactured N04400 wide-width strip coil is uniform in structure and excellent in performance, the yield and production efficiency can be remarkably improved, and the production cost can be reduced.

The invention discloses a neodymium-iron-boron trivalent chromium plating method with a triple electrochemical protection effect and a plating layer structure. The method comprises the step of sequentially preparing a cyanide-free copper-zinc alloy plating layer, a cyanide-free copper plating layer, a nickel-copper alloy plating layer, a semi-bright nickel plating layer, a nickel-cobalt alloy plating layer, a trivalent chromium plating layer and a rare earth electrolysis protection film on a neodymium-iron-boron substrate. According to the process for preparing the cyanide-free copper plating layer, 18-24 g / L of polycuprous thiocyanate, 130-170 g / L of polysodium thiocyanate, 20-30 g / L of sodium hydroxyethylidene diphosphonate and 8-12 mL / L of a copper plating brightener are adopted, the pH value of a plating solution is 12-13, the temperature of a plating tank is 30-40 DEG C, the cathode current density is 0.5-1.5 A / dm < 2 >, the cathode movement speed is 3-5 m / min, oxygen-free electrolytic copper particles serve as an anode, and the anode movement speed is 3-5 m / min. The surface of the prepared trivalent chromium-plated sample piece is not rusted after being subjected to a neutral salt spray test for 142 hours according to the GB / T 10125-2021 standard.

The invention discloses a magnesium alloy gold plating method with triple electrochemical protection effects and a plating layer structure. The process comprises the following steps: sequentially preparing a chemical zinc deposition layer, a cyanide-free copper-tin alloy plating layer, a cyanide-free copper-zinc alloy plating layer, a bright nickel-copper alloy plating layer, a nickel-phosphorus alloy plating layer, a gold plating layer and an anti-discoloration protective film on a magnesium alloy substrate. According to the cyanide-free copper-tin alloy plating process, 18-24 g / L of polycuprous thiocyanate, 0.2-0.6 g / L of stannous oxalate, 130-170 g / L of polysodium thiocyanate, 20-30 g / L of sodium 1-hydroxyethylidene-1, 1-diphosphonate and 8-12 mL / L of a copper-tin alloy plating brightener are adopted, the pH value of a plating solution is 12-13, the temperature of a plating tank is 30-40 DEG C, the cathode current density is 0.5-1.5 A / dm < 2 >, the cathode movement speed is 3-5 m / min, oxygen-free electrolytic copper particles serve as an anode, the copper particles are loaded into a titanium anode basket, the area ratio of the anode to the cathode is larger than 3: 1, and the anode movement speed is 3-5 m / min. And the surface of a plated part is not rusted after the plated part is subjected to an acetate mist test for 200 hours according to the GB / T 10125-2021 standard.

The invention provides a gradient heating temperature control method suitable for a high-nickel-copper alloy ingot extrusion preparation process, belongs to the technical field of metal material pressure processing, and solves the problems that a high-nickel-copper alloy is difficult to form and is easy to overburn or cannot be extruded due to a narrow hot processing temperature window in a hot extrusion process. The temperatures of the induction coils of the heating furnace are set respectively, so that a gradient temperature field from low temperature to high temperature is formed; the method comprises the following steps: performing gradient heating on a high-nickel copper alloy cast ingot, detecting the surface temperature of the cast ingot by adopting infrared temperature measuring equipment, suspending heating in an induction furnace when the temperature of the cast ingot reaches a set process temperature, and extruding until the whole cast ingot reaches a temperature state suitable for extrusion; and continuously monitoring the surface state of the cast ingot in the extrusion process to finally obtain the product. According to the method, the extruded product with the surface quality and the size specification meeting the requirements and the uniform internal structure is obtained through accurate temperature gradient regulation and control.

The present application relates to large-scale forging surface defect rotating detection technical field, specifically to a kind of large-scale nickel-copper alloy forging surface defect rotating detection system, including main detection unit, for output sensor coordinate system under surface point vector;Dynamic pose perception unit, for measuring the relative pose of forging surface relative to the sensor base;Space-time data fusion unit, for real-time estimation of sensor base real pose, and the real pose of forging relative to base;Dynamic reference reconstruction engine, for output the surface point vector, real-time calculation the unique coordinate of the surface point vector in the local model coordinate system of forging;Generate distortionless global surface model;System state feedback unit, for real-time calculation dynamic reference jitter index;The system state feedback unit, actively send speed command to rotating drive system;The present application solves the technical conflict between severe mechanical vibration and micron-level detection accuracy.

The invention belongs to the technical field of alloy materials, and particularly relates to a high-strength erosion-corrosion-resistant copper-nickel alloy and a preparation method and application thereof. The high-strength erosion-corrosion-resistant copper-nickel alloy comprises 26%-29% of Ni element, 1%-2% of Fe element, 2%-4% of Mn element, 1.5%-2.5% of Al element, 0.3%-0.5% of Cr element, 0.6%-1% of Nb element and the balance Cu element and inevitable impurities. The copper-nickel alloy material obtained by optimizing the types and contents of elements in the nickel-copper alloy and optimizing the matched thermomechanical treatment process and aging process has excellent comprehensive performance, and particularly has relatively high strength and high-flow-rate sediment seawater erosion corrosion resistance.

The invention relates to the technical field of medical instruments, in particular to an intraoperative nerve monitor anti-interference device and method based on self-adaptive filtering, the device comprises an anti-interference shell and a closed cover plate, the closed cover plate is fixedly connected with the top of the anti-interference shell through bolt sets arranged on the periphery, a monitor is placed in the anti-interference shell, and the anti-interference shell is fixedly connected with the closed cover plate through bolts arranged on the periphery of the closed cover plate. A positioning assembly used for stably limiting the monitor is further arranged on the periphery of the interior of the anti-interference shell. The anti-interference shell is of a three-layer structure comprising the protective frame, the heat dissipation cold frame and the electromagnetic shielding frame, and the electromagnetic shielding frame is provided with a carbon fiber reinforcing layer, a nickel-copper alloy conducting layer and a PEEK protective layer, so that liquid and instrument collision in an operation environment can be resisted, and external electromagnetic interference can be isolated; the positioning frame is adjusted to be tightly attached to the monitor through the inflation cavity, elastic allowance is reserved in cooperation with the adjusting spring and the damper, longitudinal buffering of the damping bottom pad and the limiting top plate is combined, and the influence of vibration in transportation and operation on the monitor can be reduced.

The invention discloses a high-density tungsten-nickel-copper alloy material. The tungsten-nickel-copper alloy material comprises tungsten, nickel, copper powder, modified liquid and a synergist, wherein the substance mass ratio of the tungsten to the nickel to the copper powder to the modified liquid to the synergist is (3-5): (1-3): (5-9): (12-14): 1. According to the tungsten-nickel-copper alloy material, the tungsten powder, the nickel powder and the copper powder are adopted as base materials, the synergist is added for cooperation and synergism, then the raw materials are subjected to interface modification through the modification liquid, the performance effect of a product is optimized, the synergist and the modification liquid are adopted for cooperation and joint synergism, and the strength performance, wear resistance and density of the product are improved in a coordinated mode; and the performance effect of the product is coordinated and improved.