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An alloy is a combination of metals or a combination of one or more metals with non-metallic elements. For example, combining the metallic elements gold and copper produces red gold, gold and silver becomes white gold, and silver combined with copper produces sterling silver. Elemental iron, combined with non-metallic carbon or silicon, produces alloys called steel or silicon steel. The resulting mixture forms a substance with properties that often differ from those of the pure metals, such as increased strength or hardness. Unlike other substances that may contain metallic bases but do not behave as metals, such as aluminium oxide (sapphire), beryllium aluminium silicate (emerald) or sodium chloride (salt), an alloy will retain all the properties of a metal in the resulting material, such as electrical conductivity, ductility, opaqueness, and luster. Alloys are used in a wide variety of applications, from the steel alloys, used in everything from buildings to automobiles to surgical tools, to exotic titanium-alloys used in the aerospace industry, to beryllium-copper alloys for non-sparking tools. In some cases, a combination of metals may reduce the overall cost of the material while preserving important properties. In other cases, the combination of metals imparts synergistic properties to the constituent metal elements such as corrosion resistance or mechanical strength. Examples of alloys are steel, solder, brass, pewter, duralumin, bronze and amalgams.
Numerical control machining method and system integrating thermal expansion dynamic compensation
The invention relates to the field of numerical control machining, discloses a numerical control machining method and system integrating thermal expansion dynamic compensation, and aims to solve the problem that precision is out of control due to thermal deformation in high-speed cutting of motorcycle light alloy castings. The method comprises the steps that distributed temperature and displacement sensors are arranged in a key area of a workpiece, and a temperature field and thermal expansion amount are collected in real time; constructing a local thermal deformation prediction model based on a material expansion coefficient and a geometric structure, and correcting a tool path in real time through a coordinate system dynamic offset algorithm; and an on-line measurement feedback mechanism is introduced, and model parameters are adaptively optimized, so that closed-loop compensation is realized. The system comprises a sensing module, a thermal deformation modeling and compensation calculation module, a coordinate dynamic correction module, an online measurement feedback module and a parameter adaptive updating module. Through millisecond-level dynamic compensation and closed-loop self-optimization, the size precision and form and position stability of the complex thin-wall part under the high-temperature working condition are remarkably improved, the rejection rate and cooling energy consumption are reduced, and the method is suitable for a high-precision batch machining scene.
Owner:ZHEJIANG JUNHONG MECHANICS CO LTD
Automatic welding device for rotary alloy furnace tube
The invention discloses an automatic welding device for a rotary alloy furnace tube, and belongs to the technical field of arc welding equipment.The automatic welding device for the rotary alloy furnace tube comprises a base and a U-shaped bin located at the top of the base, and the two ends of the interior of the U-shaped bin are jointly provided with a centering clamping mechanism used for clamping the outer side of the furnace tube; a driving mechanism for providing power for the centering clamping mechanism to clamp the furnace tube is arranged on the outer side of the centering clamping mechanism, and a welding mechanism is arranged on the inner top of the U-shaped bin. A local sealing design is adopted for the inflation mechanism, the annular air bag is attached to the inner wall of the furnace tube after being inflated, an independent cavity communicated with the outside only through a welding seam gap is formed near the welding seam, the protection requirement can be met only by filling the local space with argon, the whole furnace tube or a large-range external space does not need to be filled, and compared with traditional overall argon filling, the argon filling efficiency is greatly improved. The argon consumption is greatly reduced, the industrial gas purchase cost is remarkably reduced, and the production cost investment is reduced.
Owner:ZUORAN JINGJIANG EQUIP MFG
Preparation method of laser cladding heterostructure stainless steel
PendingCN121042563AAdditive manufacturing apparatusIncreasing energy efficiencyHeterojunctionSS - Stainless steel
The invention provides a preparation method of laser cladding heterostructure stainless steel. According to the method, dried stainless steel pre-alloyed powder is subjected to laser melting deposition to form heterostructure stainless steel alloy with cross deposition of coarse grains and fine grains; the grain size of the fine crystal is 3-6 [mu] m, and the structure of the fine crystal layer is an equiaxed structure; the grain size of the coarse crystal is 20-50 [mu] m, and the structure of the coarse crystal layer is a columnar crystal formed along the Z axis. According to the method, the specific coarse grain / fine grain cross deposition heterostructure is presented in the stainless steel by changing the deposition layer process parameters and the scanning path, the material strength is improved while the material ductility is guaranteed, and the alloy has the excellent mechanical property.
Owner:HENGPU (NINGBO) LASER TECH CO LTD
Hot-rolled wire rod for 2260MPa-grade stranded wire and manufacturing method of hot-rolled wire rod
The invention relates to a hot-rolled wire rod for a 2260MPa-grade stranded wire and a manufacturing method of the hot-rolled wire rod, after the high-carbon component design of C-Si-Mn-Cr-Mo-Nb-Al is adopted for rolling and spinning to form the wire rod, online molten salt isothermal toughening treatment is carried out, so that the wire rod is firstly subjected to front-section molten salt treatment and is rapidly cooled, and enters a sorbite phase region from an austenite state to form a structure taking a sorbite structure as a main structure; and then carrying out rear-section molten salt treatment, reducing the circulation volume of molten salt, promoting the unconverted retained austenite to be continuously converted into sorbite, carrying out isothermal tempering, promoting fusing of a part of sorbite lamellar layers, and finally carrying out slow cooling through a roller way, so as to prepare the hot-rolled wire rod of which the microscopic structure comprises a mixed structure consisting of tempered sorbite, ferrite and fused sorbite, the tensile strength can reach 1534-1584 MPa, the percentage reduction of area can reach 33%-38%, and the alloy can be used in the application fields of manufacturing 2260 MPa grade stranded wires and the like without additional heat treatment procedures.
Owner:JIANGSU YONGGANG GROUP CO LTD +1
High-strength silver-free copper-based brazing filler metal
InactiveCN104889598ALow costGood welding effectWelding/cutting media/materialsWelding/soldering/cutting articlesFiller metalCopper
The invention discloses a high-strength silver-free copper-based brazing filler metal which is composed of P, Sn, Ni and Cu. The high-strength silver-free copper-based brazing filler metal is low in cost, safe, environmentally friendly and good in welding effect; through the adding of Sn and Ni, the melting point of brazing filler metal alloy is reduced, and the tensile strength and wettability of the brazing filler metal alloy are enhanced.
Owner:ANHUI HUAZHONG WELDING MATERIAL CO LTD
Casting density optimization system and method based on cooperative regulation and control of molding sand moisture and clay blue absorption amount
The invention discloses a casting density optimization system and method based on cooperative regulation and control of molding sand moisture and clay blue absorption amount, and relates to the technical field of casting control. According to the method, a self-cleaning wear-resistant alloy probe is used for synchronously collecting a molding sand high-frequency eddy current signal and a multi-spectrum near-infrared signal in the sand mixing process; inputting a pre-training support vector machine regression signal fusion model to obtain a real-time moisture content and a clay blue absorption amount; a preset density target threshold value is combined, a density-molding sand parameter association database is inquired to determine a parameter target interval, a regulation and control instruction is generated after a deviation value is calculated, and a water adding device and a clay conveying device are controlled to adjust the use amount; the density of the casting after regulation and control is detected, if the density does not reach the standard, model output weight iteration optimization is corrected until the density reaches the standard, the system comprises a detection module, a signal processing module, a regulation and control execution module, a density detection and correction module and a central control module, closed-loop control is achieved, and the density stability of the casting is improved.
Owner:YINGXIN HUITONG (YAAN) INTELLIGENT MFG CO LTD
Pumps having components including carbon-manganese-chromium (c-MN-CR) steel alloys and related methods
Systems and methods described herein may include pumps and pump components including carbon-manganese-chromium (C—Mn—Cr)-based steel alloys for enhanced resistance to wear or corrosion. A pump component may include one or more components formed of a C—Mn—Cr-based ferrous alloy, which may result in enhanced wear or corrosion resistance. The C—Mn—Cr-based ferrous alloy may include a carbon content ranging from about 0.1 weight percent (wt. %) to about 2 wt. %, a manganese content ranging from about 10 wt. % to about 30 wt. %, and a chromium content ranging from about 0.1 wt. % to about 20 wt. %.
Owner:VULCAN IND HOLDINGS LLC
Yttrium-rich neodymium-iron-boron magnet and preparation method thereof
PendingCN121416300AMagnetic materialsInductances/transformers/magnets manufactureRare-earth elementCompression molding
The invention discloses an yttrium-rich neodymium-iron-boron magnet and a preparation method thereof, and belongs to the technical field of rare earth permanent magnet material preparation. The preparation method comprises the following steps: mixing yttrium-rich neodymium-iron-boron matrix alloy powder with grain boundary doped alloy powder containing Gd and / or Ho, and carrying out compression molding and sintering tempering treatment to obtain a first yttrium-rich neodymium-iron-boron magnet. According to the invention, the grain boundary doped alloy powder containing Gd and / or Ho is added into the yttrium-rich neodymium iron boron matrix alloy powder and then is sintered, so that a continuous and uniform non-magnetic thin-wall grain boundary phase structure is formed in the grain boundary, and the coercive force of the magnet is enhanced. Dy and / or Tb heavy rare earth element grain boundary diffusion is carried out based on the first yttrium-rich neodymium-iron-boron magnet after grain boundary modification, a second yttrium-rich neodymium-iron-boron magnet is obtained, the diffusion depth of Dy and / or Tb in the magnet can be increased, the utilization rate can be increased, the cost can be reduced, the coercivity of the magnet can be improved, and the adverse effect of Dy and / or Tb on residual magnetism can be reduced.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACAD OF SCI
Multi-component composite oxide dispersion strengthened molybdenum alloy and preparation method thereof
The invention discloses a multi-component composite oxide dispersion strengthening molybdenum alloy and a preparation method thereof, and relates to the technical field of refractory metal powder metallurgy preparation. The molybdenum alloy comprises a molybdenum matrix and a Y-X-O composite oxide nano precipitated phase dispersed and distributed in the molybdenum matrix. The molybdenum alloy comprises the following components in percentage by mass: 1%-2% of Y2O3, 0.3%-1.2% of an active element X, 96.5%-98.7% of molybdenum and inevitable impurities, wherein X is selected from one of Ti, Zr and Hf; the Y-X-O composite oxide nano precipitated phase and the molybdenum matrix form a coherent or semi-coherent interface, and the interface mismatch degree is less than or equal to 5%. The molybdenum alloy has excellent high-temperature strength and creep resistance, and can be applied to the high-temperature fields of nuclear industry, aerospace and the like.
Owner:XIAN UNIV OF TECH
High-hardness tungsten carbide-cobalt hard alloy and preparation method thereof
The invention discloses a high-hardness tungsten carbide-cobalt hard alloy and a preparation method thereof. A production raw material formula comprises the following components in parts by mass: 100 parts of tungsten carbide powder, 6-20 parts of cobalt powder, 0.2-1.3 parts of a composite sintering aid, 0.5-4 parts of a wet grinding medium and 0.2-4 parts of a forming agent, the composite sintering aid is composed of rare earth oxide and cobalt phosphide according to the mass ratio of (1-5): 1. The method has the advantages that on the premise that the toughness of the tungsten carbide-cobalt hard alloy is slightly improved, the hardness and wear resistance of the alloy are remarkably improved, and the industrial problems that the hardness improvement of the tungsten carbide-cobalt hard alloy with a single sintering aid is limited and the toughness of the alloy is lost are solved.
Owner:SICHUAN MINGJIE NEW MATERIALS CO LTD
Heat-resistant aluminum rare earth alloy wire containing double-phase nano-structure and preparation method of heat-resistant aluminum rare earth alloy wire
The invention discloses a heat-resistant aluminum rare earth alloy wire containing a two-phase nanostructure and a preparation method of the heat-resistant aluminum rare earth alloy wire, and belongs to the field of non-ferrous metal materials. According to the alloy, aluminum serves as a matrix, and the alloy further comprises, by mass, 0.005%-0.2% of Ce, 0.05%-0.25% of Er, 0.05%-0.25% of Yb, 0.1%-0.2% of Zr and 0.05%-0.2% of Fe. The alloy wire prepared by combining two-stage homogenization, hot extrusion and cold drawing processes contains an Al3 (RE, Zr) nano precipitated phase and a nanoscale Al13Fe4 dispersed phase, the inner layer of the Al3 (RE, Zr) nano precipitated phase is Al3RE, and the outer layer of the Al3 (RE, Zr) nano precipitated phase is Al3Zr; and the nanoscale Al13Fe4 dispersed phase is a nano precipitated phase formed by sequentially coating the outer layer of an Al13Fe4 phase with an Al3RE structure and an Al3Zr structure. The alloy provided by the invention has excellent strength, high-temperature service stability and conductivity.
Owner:CENT SOUTH UNIV
Method for recovering tungsten and rhenium from tungsten-rhenium alloy waste
The invention provides a method for recovering tungsten and rhenium from tungsten-rhenium alloy waste, which comprises the following steps: S1, collecting the tungsten-rhenium alloy waste, and crushing to obtain tungsten-rhenium alloy waste powder; s2, the cleaned tungsten-rhenium alloy waste powder is put into a reactor, and then a strong alkaline solution containing hydrogen peroxide is added into the reactor for a reaction; in the strong alkaline solution, the concentration of OH <-> dissociated by the strong alkaline substance is 2.0-4.0 mol / L, and the mass fraction of hydrogen peroxide in the strong alkaline solution is 5-15%; in the reaction process, synchronously and continuously introducing oxidizing gas into the reactor and applying ultrasonic treatment; and S3, after the reaction is finished, carrying out solid-liquid separation, collecting a leaching solution, then separating tungsten-containing ions and rhenium-containing ions in the leaching solution to respectively obtain a tungsten-containing ion solution and a rhenium-containing ion solution, and carrying out subsequent treatment to obtain tungsten salt or metal tungsten and rhenium salt or metal rhenium. According to the method, the passivation problem can be effectively solved, and the leaching rate and recovery rate of W and Re can be increased.
Owner:ANHUI ZHONGKE YIHE NEW MATERIALS CO LTD
Fe-Si-Nb-B-Cu-Er amorphous alloy and preparation method and application thereof
PendingCN121406988AMagnetic materialsInductances/transformers/magnets manufactureRare-earth elementMetallic materials
The invention relates to a Fe-Si-Nb-B-Cu-Er amorphous alloy and a preparation method and application thereof, and belongs to the technical field of metal materials. The atomic percent expression of the Fe-Si-Nb-B-Cu-Er amorphous alloy disclosed by the invention is (Fe < 83 > Si < 3 > Nb < 4 > B < 9 > Cu < 1 >) < 100-x > Er < x >, wherein x is equal to 3.5 to 4.5. The rare earth element Er is added to optimize the soft magnetic performance of a Fe-Si-Nb-B-Cu amorphous alloy system, the coercive force of the Fe-Si-Nb-B-Cu amorphous alloy system is reduced, the preparation method is simple and easy to implement, and the Fe-based amorphous alloy with the excellent soft magnetization performance is obtained. The magnetization intensity of the amorphous alloy is sharply increased along with increase of a magnetic field under a low magnetic field and then gradually reaches saturation, typical soft magnetic performance is presented, and the amorphous alloy has wide application space in the field of magnetic materials.
Owner:ELECTRIC POWER RES INST OF GUANGDONG POWER GRID CO LTD
Welding device capable of cleaning surface welding slag for low-alloy structural steel
InactiveCN121870357AWelding/cutting auxillary devicesAuxillary welding devicesSlag (welding)Gear wheel
The invention relates to the technical field of welding devices, and discloses a low-alloy structural steel welding device capable of cleaning surface welding slag, which comprises a welding frame, a rotating frame is rotatably mounted on the welding frame, a driving gear ring is rotatably mounted on the rotating frame, and a feeding and discharging station, a preheating station, a welding station and a slag cleaning station are sequentially arranged on the welding frame in the anticlockwise direction. A guide shaft is rotationally mounted at the position, corresponding to the slag removal station, of the welding frame, a guide gear meshed with the driving gear ring is mounted on the guide shaft, and four welding systems are mounted on the welding frame. Through differential meshing design of the fan gear and the driven gear and in combination with an elastic reset mechanism of the torsional spring, the cleaning frame generates a circulating switching mode of'high-frequency small-amplitude vibration 'and'low-frequency large-amplitude vibration' at the slag cleaning station, the high-frequency vibration can accurately crush loose welding slag, the low-frequency vibration can effectively shake off the firmly attached welding slag, and therefore the welding slag cleaning efficiency is improved. And the two modes alternately act to cover welding slag characteristics generated by different welding processes.
Owner:GUANGDONG ZHENGHE ENG CO LTD
High-strength wear-resistant self-lubricating drill bit for coal mine and preparation method thereof
The invention discloses a high-strength wear-resistant self-lubricating drill bit for a coal mine and a preparation method of the high-strength wear-resistant self-lubricating drill bit. The preparation process comprises the steps that a drill bit blank is prepared from low-alloy carbon structural steel, a high-strength and high-toughness matrix is obtained through thermal refining, and then sand blasting activation is conducted to clean and coarsen the surface. After diamond particles are subjected to acid pickling pretreatment, metal modified diamond composite powder is obtained through salt bath metal and reduction prefabrication. The preparation method comprises the following steps: mixing MoS2 with the carbon dioxide, spraying the mixture on the surface of a matrix through high velocity oxy-fuel to form a wear-resistant coating, and then improving the density and interface bonding strength of the coating through high-frequency induction instantaneous remelting, thereby finally obtaining the coal mine drill bit with high hardness, strong bonding force and self-lubricating performance. The metal modified diamond composite coating containing the metal transition layer and the MoS2 lubricating phase is constructed on the steel substrate, and a high-frequency remelting process is combined, so that the wear resistance, the bonding strength and the self-lubricating performance of the drill bit are synergistically improved, and the drill bit has the advantages of high strength and toughness matching and low cost.
Owner:XIAN NEW NORTHWEST TECH CO LTD
Fault indication device of lightning arrester and lightning arrester
PendingCN121027921ADischarge by conduction/dissipationShort-circuit testingElectrical resistance and conductanceThermodynamics
The invention provides a fault indication device of a lightning arrester and the lightning arrester. The fault indication device comprises a target resistor, a low-melting-point alloy, a counterweight and a shell, the target resistor, the low-melting-point alloy and the counter weight are all located in the shell; the first end of the target resistor is connected with a shell of the lightning arrester, the second end of the target resistor is grounded, the upper end of the low-melting-point alloy is in fixed contact with the target resistor, and the lower end of the low-melting-point alloy is connected with the balance weight; the shell comprises a visual subarea at the bottom; the target resistor generates different heat according to the magnitude of the leakage current of the lightning arrester, and when the temperature of the target resistor is higher than the melting point temperature of the low-melting-point alloy, the low-melting-point alloy is melted, and the counterweight falls into the visual partition. According to the device, by triggering melting of the low-melting-point alloy, advanced visual early warning can be provided before the lightning arrester breaks down, and the problem that fault indication of the lightning arrester is not timely is solved.
Owner:STATE GRID HEBEI ELECTRIC POWER CO LTD +1
Alloy vacuum furnace
The utility model relates to the technical field of heating furnaces, in particular to an alloy vacuum furnace which comprises a furnace body and a heating mechanism arranged in the furnace body, the heating mechanism comprises a plurality of annular heating pieces, the annular heating pieces are divided into top heating pieces, bottom heating pieces and a plurality of middle heating pieces, the bottom heating pieces are fixedly connected with the inner wall of the furnace body, and the middle heating pieces are fixedly connected with the furnace body. The top heating piece and the middle heating piece move in the height direction of the furnace body through a vertical adjusting mechanism, the vertical adjusting mechanism comprises a screw rod and a connecting block, the connecting block is fixedly arranged on the periphery of the top heating piece, the screw rod is arranged in the height direction of the furnace body, and the upper end of the screw rod is in threaded connection with the connecting block; the lower end of the screw penetrates through the furnace body and is fixedly connected with an output shaft of a transmission motor arranged at the bottom of the furnace body. According to the alloy vacuum furnace, by adjusting the heating piece, the heating range of the heating piece is matched with the height of alloy contained in the crucible, heat energy of the heating piece is concentrated to heat the alloy, and the heat energy utilization rate is increased.
Owner:JIANGSU QIDI ALLOY
Laser welding device and process for machining large-diameter thin-wall low-thermal-expansion alloy pipe
InactiveCN121017802AMetal working apparatusLaser beam welding apparatusPipe fittingElectric machinery
The invention relates to the technical field of pipe fitting laser welding, and discloses a laser welding device and process for machining a large-diameter thin-wall low-thermal-expansion alloy pipe, and the laser welding device for machining the large-diameter thin-wall low-thermal-expansion alloy pipe comprises a machine body, a welding table arranged on one side of the machine body, and a supporting assembly arranged on the welding table and used for supporting. The two alloy pipes are arranged at the top of the supporting assembly and used for welding, the laser welding gun is arranged on the welding table and located on one sides of the alloy pipes, the rotating motor is arranged on one side of the machine body, the clamping base is arranged on one side of an output shaft of the rotating motor, and the clamping unit is arranged on the clamping base. Local stress concentration is avoided through cooperation of air bag clamping and a moving plate, an air bag cavity of the clamping assembly is matched with the moving plate of the auxiliary assembly to form a two-way pressure control structure, when the air bag is inflated and expanded, directional expansion can be achieved, the clamping contact area can be enlarged, and thin wall sinking caused by point contact or line contact is avoided.
Owner:WUXI XINFENG TUBE IND
Recycling method of tungsten-rhenium alloy waste
The invention belongs to the technical field of scattered metal recovery, and particularly relates to a recycling method of tungsten-rhenium alloy waste. The tungsten-rhenium alloy is a solid solution strengthened alloy which takes tungsten element as a matrix and consists of the tungsten element and rhenium element, and has the characteristics of high melting point, high strength and high hardness. As the price is high, it is very necessary to comprehensively utilize the tungsten-rhenium alloy waste. The invention discloses a recycling method of tungsten-rhenium alloy waste. Firstly, tungsten-rhenium alloy waste is cleaned, dried and smashed, and waste powder is formed; then dispersing the waste material powder into water dissolved with ammonium metatungstate and a surfactant; then, carrying out spray drying to form mixed powder; and finally, the mixed powder is subjected to roasting and hydrogen reduction, and tungsten-rhenium alloy powder with the metal rhenium content lower than the metal rhenium content in the tungsten-rhenium alloy waste is formed. Compared with an existing tungsten-rhenium alloy waste recycling method, the recycling method has the advantages of being simple in process, low in energy consumption, small in loss and good in uniformity.
Owner:ZHUJI HONGDE NEW MATERIAL CO LTD
Plastic coating process for high-performance metal wire for aerospace engineering
PendingCN121131212AMaterial analysis using wave/particle radiationMolten spray coatingNano structuringAlloy
The invention relates to the technical field of metal wire processing, and discloses a high-performance metal wire plastic coating process for aerospace engineering, which comprises the following steps: carrying out base material type selection on a metal wire, and carrying out surface treatment of precise cleaning, etching and depth gradient activation; a Ti-Cr alloy and graphene-copper composite transition layer is deposited through a magnetron sputtering technology, and a multi-layer coating structure is formed through electrostatic spraying of a base coating, a fluidized bed dipping function layer and high velocity oxy-fuel spraying of a nano composite coating in sequence; the molybdenum-gold composite sealing layer is prepared by adopting an electric arc spraying technology, and is subjected to vacuum ultraviolet curing enhancement, high-temperature gradient annealing, gradient sintering and vacuum curing treatment; and heat radiation on the surface of the coating is enhanced through laser-induced micro-nano structure regulation and silicon nitride film sputtering. Through collaborative optimization of base material treatment, coating construction, function strengthening and quality control, the interface bonding strength, the comprehensive performance and the environmental adaptability of the spaceflight metal wire coating are remarkably improved, and the service life of the spaceflight metal wire coating is remarkably prolonged.
Owner:SUZHOU XINYI METAL PROD CO LTD
Short-process manufacturing process of aluminum foil for high-strength 8021 alloy container
PendingCN121046664AProcess efficiency improvementMetal rolling arrangementsTemperingEconomic benefits
The invention introduces a short-process manufacturing process of aluminum foil for a high-strength 8021 alloy container, and relates to the technical field of aluminum foil processing, and the short-process manufacturing process comprises the following specific steps: S1, smelting; s2, on-line treatment of the melt; s3, continuous casting and rolling; s4, cold foil rolling; s5, annealing a finished product; and S6, checking and packaging. According to the method, homogenizing annealing and even after-process cold foil rolling production are not needed, components can be utilized, the blank can be discharged from a machine for preheating, blank waste heat can play a role in eliminating internal stress through low-temperature tempering, the subsequent rolling deformation resistance is reduced, and the low-carbon production concept is really practiced; the single-pass machining rate of cold foil rolling is larger, the number of rolling passes is smaller, rolling is easier, production is easier, the production cost of cold foil rolling and foil rolling can be effectively reduced, and economic benefits of industrial production are achieved.
Owner:LUOYANG LONGDING ALUMINUM
Laser welding diamond saw blade for ultra-narrow slit cutting and preparation method of laser welding diamond saw blade
The invention relates to the technical field of diamond saw blades, in particular to a laser welding diamond saw blade for ultra-narrow slit cutting and a preparation method of the laser welding diamond saw blade. The copper-cobalt-tin alloy material comprises the following raw materials: copper-cobalt-tin alloy powder, tungsten carbide powder, titanium-aluminum nitride, spherical cobalt powder, rare earth yttrium powder, ferrophosphorus powder and diamond abrasive particles. According to the preparation method, the core of the preparation method lies in the combination of powder metallurgy prefabrication of the tool bit and the precise laser welding process, especially the innovative laser welding process, and the prepared diamond saw blade is high in welding seam strength, narrow in heat affected zone and extremely small in matrix deformation; the problems of base body deformation, insufficient welding seam strength, short service life and the like of a traditional saw blade in the ultra-narrow seam cutting process are solved, and the saw blade is perfectly suitable for ultra-narrow seam cutting scenes with extremely high requirements for precision and stability.
Owner:CHENGDU HUIFENG ZHIZAO TECH CO LTD
Preparation method of high-hardness high-strength free-cutting platinum-iridium alloy bar and platinum-iridium alloy bar
The invention relates to a preparation method of a high-hardness high-strength free-cutting platinum-iridium alloy bar and the platinum-iridium alloy bar, the purity of raw materials is higher than 99.95%, and the platinum-iridium alloy bar comprises 9.5-10.5 wt% of iridium and the balance of platinum and inevitable impurities; the preparation method comprises the following steps: step 1, smelting and casting; the temperature of the alloy casting rod is increased to be higher than 1100 DEG C in a segmented mode, heat preservation is conducted for 100 min or above, at least three stages of forging dies are adopted for hole shrinkage hot forging, and the hole shrinkage proportion between the forging dies at all stages is 8%-25%; and thirdly, cold machining is conducted, the non-sharpening platinum-iridium alloy bar with the diameter ranging from 0.6 mm to 6.0 mm is obtained, the hardness of the platinum-iridium alloy bar is 180 HV or above, and the tensile strength of the platinum-iridium alloy bar is 550 MPa or above. Through the processes of high-frequency smelting, preheating casting, hole shrinkage hot forging and the like, bar forming and internal structure and surface quality regulation and control are considered, and the high-hardness and high-strength non-cutting platinum iridium alloy bar product is directly obtained.
Owner:ZHEJIANG GOLDEN CONNECTION TECH CO LTD
780MPa-grade formability-enhanced cold-rolled dual-phase steel and preparation method thereof
The invention relates to the technical field of high-strength steel production, in particular to 780MPa-grade forming-enhanced cold-rolled dual-phase steel and a preparation method thereof.The 780MPa-grade forming-enhanced cold-rolled dual-phase steel comprises the chemical components of 0.09%-0.11% of C, 0.25%-0.45% of Si, 1.9%-2.1% of Mn, smaller than or equal to 0.012% of P, smaller than or equal to 0.006% of S, 0.03%-0.05% of Als, smaller than or equal to 0.005% of N, 0.25%-0.35% of Cr, 0.015%-0.025% of Nb, 0.08%-0.12% of Cu and 0.05%-0.09% of Ni, and the ratio of Nb to Cr is 1: 10-1: 12; ceq is equal to 0.38%-0.42%, and the balance is Fe and impurities; the core objective of the invention is to enable the work hardening index n value to be greater than or equal to 0.24 through component collaborative optimization and process precise regulation and control, so that the industrial pain points of insufficient reaming performance and poor formability of the existing 780MPa-grade cold-rolled dual-phase steel are fundamentally solved, and meanwhile, the alloy cost is reduced, and the manufacturability is improved.
Owner:BENGANG STEEL PLATES CO LTD
Binding-phase-free hard alloy and preparation method thereof
The invention relates to the technical field of powder metallurgy materials, and discloses a binding-phase-free hard alloy and a preparation method thereof.The binding-phase-free hard alloy comprises, by mass, 75-80 parts of WC; 8 to 12 parts of TiC; 5 to 8 parts of TaC; 3 to 5 parts of ZrC; 1.5 to 2.5 parts of HfC; 0.8 to 1.2 parts of rare earth oxide; the preparation method comprises the five key steps of core-shell structure composite powder preparation, high-energy beam melting gradient accumulation, microwave-magnetic field composite field activation, multi-stage pressure plasma sintering and staged variable-rate gradient cooling. And component gradient design is cooperated with a multi-field coupling process. Through collaborative design of a core-shell structure hard phase and a gradient composite phase, and in combination with a multi-field coupling activated sintering and gradient cooling process, the problem of obdurability balance of the non-binding-phase hard alloy is solved, the microstructure stability is optimized, and the comprehensive performance and the process controllability are improved.
Owner:SHANDONG RUIXIN TUNGSTEN CO LTD
Copper-molybdenum alloy component and manufacturing method thereof
PendingCN121607657AAdditive manufacturing apparatusTransportation and packagingElectro conductivityAlloy
The invention discloses a copper-molybdenum alloy component and a manufacturing method thereof, and belongs to the technical field of alloy manufacturing. Mo powder is sequentially subjected to vacuum drying treatment, oxidation-reduction treatment and coating treatment, so that the Mo powder has good flowability and powder laying uniformity; under the preset 3D printing condition, the porous Mo framework which is stably formed and complex in structure can be obtained, the problems that an existing rolling composite method is complex in technological process, strict in technological requirement and the like are solved, and the method is suitable for manufacturing parts with small sizes or complex shapes; the porous Mo framework is subjected to vacuum thermocuring and Cu infiltration treatment, and the obtained copper-molybdenum alloy component is excellent in compactness, high-temperature stability, interface bonding strength, heat conduction, electrical conductivity and the like. The problems that a copper-molybdenum alloy obtained in the prior art is poor in wettability and low in density and uniformity, and the mass content of copper is lower than 30%, so that the heat conductivity, the electric conductivity, the air tightness and other performance are low are solved.
Owner:SHAANXI SIRUI COPPER ALLOY INNOVATION CENT CO LTD
Conductive paste for multiphase alloying photovoltaic cell, preparation method and application thereof
PendingCN121839246ANon-conductive material with dispersed conductive materialMetal/alloy conductorsConductive pasteElectrical battery
The invention relates to a conductive paste for a multiphase alloying photovoltaic cell, a preparation method and application thereof, and belongs to the technical field of photovoltaic device manufacturing, and the conductive paste comprises the following components by mass: 25-35% of silver-coated copper powder, 10-20% of silver-coated copper powder, 10-20% of copper powder, and 10-20% of copper powder. 45%-55% of composite tin alloy powder; 10%-20% of an organic carrier; the composite tin alloy powder is composed of at least two kinds of tin alloy powder with different melting points; in the sintering and curing process of the conductive paste, metallurgical bonding is formed between the silver-coated copper powder through gradient melting of the tin alloy powder with the different melting points. Silver-coated copper powder is adopted to replace pure silver to serve as a conductive main framework, and a large amount of tin alloy is combined to serve as a connecting base body. The low-cost advantage of the copper core and the excellent conductivity of the silver shell are utilized, so that the cost of the paste is greatly reduced, and meanwhile, the excellent electrical property is ensured.
Owner:JIANG SU LING ZHONG XIN NENG KE JI YOU XIAN GONG SI
Nickel-molybdenum foam composite oxygen evolution electro-catalytic material with high-valence nickel induced by molybdate radical and preparation method of nickel-molybdenum foam composite oxygen evolution electro-catalytic material
The invention relates to the technical field of electro-catalysis oxygen evolution, and particularly discloses a nickel-molybdenum foam composite oxygen evolution electro-catalysis material with high-valence nickel induced by molybdate radicals and a preparation method of the nickel-molybdenum foam composite oxygen evolution electro-catalysis material aiming at the problem that an existing oxygen evolution electro-catalysis material is insufficient in comprehensive performance or poor in performance stability. Soaking in a NaCl aqueous solution, and taking out; s2, mixing the nickel-molybdenum alloy foam with a K3 [Fe (CN) 6] aqueous solution, heating, and carrying out a hydrothermal reaction; and S3, finally, the nickel-molybdenum alloy foam is placed in the air or oxygen atmosphere and heated to 350-450 DEG C, heat preservation treatment is conducted for 2 h, and the nickel-molybdenum foam composite oxygen evolution electro-catalysis material is obtained. Molybdate anions are adopted as a sustainable induction source to be coupled with a NixOy / Fe3O4 heterogeneous interface, integrated construction is achieved on a nickel-molybdenum foam framework, and the nickel-molybdenum foam composite material has the advantages of being low in overpotential, high in stability, high in activity, high in binding force and long-term in durability and meanwhile being simple in process, easy to amplify on a large scale and the like.
Owner:XIHUA UNIV
Tin-based alloy preformed soldering lug and preparation method thereof
The invention discloses a tin-based alloy preformed soldering lug and a preparation method thereof.The preparation method comprises the following steps that a copper fiber reinforced framework with gradient density distribution is prepared, the copper fiber reinforced framework comprises a high-density area and a low-density area, and hollowed-out gaps are formed through a weaving technology; tin-based slurry with different components and functions is prepared from outer-layer slurry with tin-antimony-copper-nickel as a main body, middle-layer slurry with tin-antimony-copper as a base body and inner-layer slurry with tin-antimony-copper rare earth as a base body, the three kinds of tin-based slurry are sequentially filled into preset areas of hollow-out gaps of a reinforced framework, and a gradient structure material is formed; the gradient structure material is subjected to press-fit forming and post-treatment, and a preformed soldering lug is obtained; a framework is firstly built, then materials are filled, and copper fibers in the soldering lugs provide good support and heat conduction channels, so that a gradient transition structure with continuous change of components and performance is realized, and the integrity, the impact resistance and the bonding strength of the materials are greatly enhanced.
Owner:SHENZHEN XINGHONGTAI TIN
High-toughness low-yield-ratio steel plate for bridge and preparation method of high-toughness low-yield-ratio steel plate
The invention discloses a high-toughness low-yield-ratio steel plate for a bridge and a preparation method of the high-toughness low-yield-ratio steel plate, and relates to the technical field of low-alloy high-strength structural steel, and the steel plate for the bridge comprises the following chemical components in percentage by weight: 0.05% < = C < = 0.09%, 0.20% < = Si < = 0.30%, 1.50% < = Mn < = 1.70%, 0.50% < = Cr < = 0.60%, 0.35% < = Cu < = 0.50%, 0.4% < = Ni < = 0.6%, 0.2% < = Mo < = 0.3%, 0.03% < = Nb < = 0.05%, 0.01% < = Ti < = 0.02%, 0 < = B < = 30 ppm, and the balance of Fe and inevitable impurities. The production method comprises the steps of billet heating and heat preservation; controlled rolling and controlled cooling; the yield strength of the produced steel plate is larger than or equal to 870 MPa, the tensile strength is larger than or equal to 780 MPa, the yield ratio is smaller than or equal to 0.86, the ductility is larger than or equal to 15%, and the impact energy at the temperature of minus 40 DEG C is larger than or equal to 150 J. On the basis that the alloy cost is remarkably reduced, the performance combination of high strength, high toughness and low yield ratio is obtained at the full thickness through process regulation and control, and the steel plate is suitable for the scene of outdoor bridge steel.
Owner:HUNAN VALIN XIANGTAN IRON & STEEL CO LTD +1