28 results about "Tungsten" patented technology

The invention relates to an inverter electric welding machine device with adjustable electric arc, which comprises a welding host machine, a welding torch, a liquid cooling system, a compressed air supply device, a protective gas supply device and an electric arc adjusting device, wherein the welding torch comprises a handle, a main cylinder body, a nozzle, an outer bushing, an inner bushing, a compression screw, a tungsten stick, a ceramic sleeve and a fixed sleeve. An electric arc adjusting device comprises an electric adjusting mechanism, and a control circuit of the electric arc adjusting device mainly consists of a push-and-pull coil and a reversing switch; the direction of current can be changed by switching the reversing switch, namely, the magnetic induction polarity of the push-and-pull coil can be changed, so that the moving direction of an induction magnet coil is forced to be changed, and the inner and the outer bushings of the welding torch are driven to change the moving direction of the tungsten stick; and a manual adjusting mechanism consists of an adjusting disc and a rotating sleeve, wherein the adjusting disc is manually rotated to drive the rotating sleeve to rotate, and the inner and the outer bushings moves up and down to drive the tungsten stick to move by mechanical transmission. The inverter electric welding machine device has the advantages that one welding machine can realize two electric arc types; free electric arc continuous compression can be converted into plasma electric arc; and the structure is simple, and the use is convenient.

The invention discloses a W-Mo-Re-HfC alloy material. The W-Mo-Re-HfC alloy material is prepared from the following raw materials by weight: 10% to 30% of molybdenum, 1% to 25% of rhenium, 0.2% to 10%of hafnium carbonate and the balances tungsten and inevitable impurities. The invention further provides a preparation method of the W-Mo-Re-HfC alloy material. The preparation method comprises the following steps of: (I) carrying out ball milling and uniformly mixing molybdenum powder, rhenium powder, hafnium carbonate powder and tungsten powder; and carrying out crushing and sieving after hydrogen reduction to obtain mixed powder; and (II) sintering the mixed powder in a vacuum hot-press sintering furnace, and then cooling the mixed powder with the furnace to obtain the W-Mo-Re-HfC alloy material. The preparation method of the W-Mo-Re-HfC alloy material disclosed by the invention is simple in a technological process; the prepared alloy material is low in oxygen content; the microstructure is uniform; a base body consists of W, Mo and Re solid solution phases; good plasticity is realized; submicron and nanometer HfC phases are uniformly distributed in the base body so that the alloymaterial is excellent in plasticity and also has good room-temperature and high-temperature strength.

The invention discloses an SPS connection method for tungsten and molybdenum dissimilar refractory metals. The SPS connection method is characterized in that blocky tungsten is taken as a base body, the base body and molybdenum powder are sintered and connected through an SPS technology, so that a connecting piece of the tungsten and molybdenum dissimilar refractory metal is obtained. According tothe SPS connection method, the molybdenum powder can be sintered and compacted on the tungsten base body, meanwhile, sintering connection of the tungsten and molybdenum metals is realized, so that the connecting piece with high strength and good forming effect is obtained, and the room temperature shearing strength of a joint can reach 152.9 MPa.

The invention relates to a tungsten-base composite material applied to ray shielding and a preparation method thereof. The tungsten-base composite material comprises the following components in parts by weight: 100 parts of rubber, 200-2000 parts of tungsten powder, 0.5-50 parts of tungsten fiber, 0.5-150 parts of barite powder and/or 0.5-250 parts of rare-earth oxide powder, 0.5-6 parts of compatilizer, 3-9 parts of activator, 0.5-50 parts of plasticizer, 0.5-3 parts of anti-aging agent, 0.05-0.5 part of anti-scorching agent, 0.5-3 parts of vulcanization accelerator and 0.5-3 parts of vulcanizing agent. The preparation method comprises the following steps: (1) proportioning and preparation of raw materials; (2) preparation of mixed filler; (3) mixing of rubber matrix; (4) extrusion and calendering; and (5) vulcanization molding and the like. The composite material is free of lead, and has the advantages of favorable ray shielding performance, favorable physical and mechanical properties and the like.

The invention discloses a preparation method of a micrometer-scale dispensing tungsten needle. The preparation method comprises the following steps: (1) winding a micrometer-scale tungsten wire onto an enameled wire; (2) penetrating the enameled wire with the tungsten wire through a capillary glass tube; (3) withdrawing the enameled wire, retaining the tungsten wire in the capillary glass tube, and straightening the tungsten wire; (4) heating the middle part of the capillary glass tube, applying a pulling force to one end of the capillary glass tube or applying opposite pulling forces to two ends of the capillary glass tube when a to-be-heated part stays at a molten state, so that the caliber of the heated part is gradually narrowed until the heated part is disconnected, completely exposing the tungsten wire on the part, and enabling the molten glass to be adhered onto the tungsten wire; (5) cutting off the exposed tungsten wire on the middle part, and forming two dispensing tungsten needles; (6) trimming needle points of the dispensing tungsten needles under a microscope, so that the length of the tungsten wire stretching out of the capillary glass tube is 0.2mm to 0.5mm. By adopting the preparation method, the micrometer-scale dispensing tungsten needle can be conveniently and rapidly prepared.

The invention discloses a method for preparing a gray iron based composite material for generating tungsten carbide in situ. The method comprises the following steps: weaving tungsten wires into a tungsten wire net with certain specification, and cutting, coiling or overlapping the tungsten wire net to form a fixed structure which is preset in a die cavity of a casting mould; and smelting the gray iron to obtain molten gray iron to be poured into a casting mould, and cooling and cleaning the casting mould to obtain the gray iron based composite material for generating the tungsten carbide in situ. The gray iron based composite material for generating the tungsten carbide in situ prepared by the method can obtain evenly-distributed tungsten carbide hard phases at the position of the tungsten wire net through the reaction in situ of the tungsten in the tungsten wire net and the carbon in the gray iron. The gray iron based composite material fully plays the high wear resistance of the tungsten carbide hard phases and the good toughness of the gray iron, the hard phases are arranged orderly and are distributed evenly, the regulation and the control are convenient, and the process is reliable, thus the gray iron based composite material can be widely used in the wear resisting fields such as mine, electric power, metallurgy, coal, building materials and the like for producing wear resistant parts with various shapes and any size specification.

The invention discloses a making method of transparent quartz dispersing reacting furnace pipe, which comprises the following steps: putting raw material into continuous fusing stove to fuse under 2400-2500 deg.c; setting the height of high temperature area in the tungsten copple at 750-850mm; falling raw material automatically; adopting nitrogen and argon gas with rate at 1: 3 as protective gas; drawing through pipe drawing machine continuously; testing pipe diameter and pipe wall through laser with metering path at 0-320mm and precision at 0.001mm; setting the moulding distance between 40mm and 60mm.

The invention relates to the field of automobile making, in particular to a novel thermoforming reinforcer and a processing method thereof. The novel thermoforming reinforce comprises the following components in parts by weight: 20-30 parts of iron, 3-5 parts of nano silicon carbide particles, 3-5 parts of tungsten, 1-2 parts of manganese, 2-6 parts of molybdenum, 3-5 parts of cobalt, 2-3.5 partsof nickel, 1-2 parts of chromium, 3-5 parts of vanadium and 2-4 parts of titanium. A manufacturing method for the reinforcer comprises the following steps of: (1) uniformly mixing the components; (2)adding mixed raw materials into a heating furnace to refine; (3) forging and pressing; (4) quenching; (5) tempering; and (6) stamping and manufacturing. A stamping part material manufactured by the manufacturing method has excellent hardness, excellent yield strength and excellent tensile strength.

The invention belongs to the technical field of metal wire drawing die manufacturing, and relates to a self-lubricating hard alloy wire drawing die and a preparation method thereof. According to the self-lubricating hard alloy wire drawing die, a base body material is prepared from the components: a tungsten-cobalt hard alloy phase and a lubricating phase, and the self-lubricating effect of drawing processing can be achieved. The self-lubricating hard alloy wire drawing die is prepared through processes of carrying out hot pressing sintering to form a blank, carrying out perforating by adopting high-energy beams, carrying out precise and fine grinding and finishing and the like. The wire drawing die can be widely applied to dry-drawing processing of nonferrous metal wires, rapid abrasion of a drawing working surface of the die caused by the low hardness of a hard alloy bonding phase can be effectively ameliorated, and therefore the service life of the wire drawing die is remarkably prolonged, the wire drawing processing production efficiency is remarkably improved, the processes are simple and convenient to use, and the wire drawing die is green and environmentally friendly.

The invention discloses a composite high-strength Nixing pottery material which is characterized by comprising, by weight, 3-6 parts of east mud, 3-6 parts of west mud, 2-3 parts of clinker after calcination of Nixing potteries, 5-9 parts of zinc oxide, 0.3-0.6 part of serpentine, 0.6-0.8 part of spodumene, 4-7 parts of fine silicon carbide powder and 2-4 parts of tungsten molybdenum rare earth alloy powder. Silicon carbide is added into the Nixing pottery material, so that a forged green body has high hardness, thermal shock resistance and an excellent heat conductivity coefficient, smaller heat stress is applied onto the green body in the heating or cooling process, and the green body has excellent abrasion resistance by a sprayed tungsten molybdenum rare earth alloy.

The invention relates to a tungsten/molybdenum rounded rectangle crucible for a high-temperature heating furnace and a manufacturing method of the tungsten/molybdenum rounded rectangle crucible. The crucible is a rounded rectangle crucible without a bottom or a cover and is formed by defining two opposite frame type circular bead end plates and at least two side plates, vertical joints between connecting plates are in riveting connection, and each vertical joint is provided with at least four riveting points which are evenly distributed. The tungsten/molybdenum crucible is good in structural stability and meets the requirement for high-temperature heating of the high-temperature heating furnace. The invention further discloses the manufacturing method of the tungsten/molybdenum crucible for the high-temperature heating furnace, materials are saved, and cost is low.

The invention discloses a preparation method of a tungsten disulfide single crystal with a controllable layer number. According to the preparation method, hydrogen sulfide is taken as a sulfur source,and micro-patterning on a precursor WO3 is carried out in advance to accurately regulate and control the amount of the precursor, thereby realizing controllable preparation of single-layer, double-layer, three-layer and multi-layer WS2 single crystals. The method provided by the invention has the advantages of few required raw materials, high yield and good repeatability, and the obtained crystalhas high quality and high electron mobility, and is especially suitable for preparation of large-area uniformly-distributed WS2 single crystals with controllable layer number.

According to the asymmetric induced room-temperature high-sensitivity photoelectric detector and the preparation method thereof provided by the invention, the tungsten sulfide material is transferred on the silicon substrate covered with the silicon oxide, the graphene material is transferred on one end of the tungsten sulfide material to realize covering contact, and the contact electrode is prepared on one end of the tungsten sulfide material covered with the graphene material to realize the asymmetric induction room-temperature high-sensitivity photoelectric detector. The contact electrode and the lead electrode serve as one end of the device; a metal electrode or a metal grating is directly prepared on the other end of the tungsten sulfide material to serve as a contact electrode and a lead electrode of the other end of the device. The invention provides an asymmetric induced room-temperature high-sensitivity photoelectric detection device, which solves the problem that a conventional metal WS2 metal device has no net light response under uniform all-light irradiation, retains the original photoelectric characteristics of a WS2 material, and enables high-sensitivity and multifunctional photoelectric detection at room temperature to have popularization and use values.

The invention discloses a golden yellow plating glass or a manufacturing method of a ceramic. The manufacturing method comprises the following steps: plating nickel-chromium-titanium alloy on the surface of the glass or the ceramic by using a vacuum vapor plating method; then entering a drying oven for heat treatment; and finally obtaining a golden yellow plating layer. The vacuum vapor plating method comprises the following steps: placing a plating material under the high vacuum condition for electrifying and heating through tungsten twisted filaments; evaporating and depositing on the surface of a body simultaneously; and then agglomerating a film. The golden yellow filming glass has the advantages of the adoption of the vacuum vapor plating method to plate the golden yellow plating layer, low cost of a device, simple process, lower production cost, convenient operation and easy maintenance and repair of the device A double stranded wire of a nickel-chromium-titanium alloy wire or a nickel chrome wire and a titanium wire is adopted as the plating material, thereby enhancing the coloring effect, in particular to better golden yellow coloring effect of the nickel chrome wire and titanium wire after being subjected to mixed vapor plating. The implementation of the heat treatment is improved by adopting the nickel-chromium-titanium alloy; the requirements on the temperature are lower; the power consumption is less; and the energy is saved.

The invention provides preparation methods of high-specific-surface-area nano W powder and high-specific-surface-area nano WC powder. The preparation method of the high-specific-surface-area nano W powder comprises the steps that blue tungsten powder serves as a raw material, reverse hydrogen reduction is adopted, a heating zone of a hydrogen reduction furnace is divided into a low-temperature zone, a medium-temperature zone and a high-temperature zone, the temperature of the low-temperature zone is set to be 500-800 DEG C, the temperature of the medium-temperature zone is set to be 600-900 DEG C, the temperature of the high-temperature zone is set to be 700-1000 DEG C, and reaction time is 5-9 h. According to the preparation method of the high-specific-surface-area nano WC powder, the high-specific-surface-area nano W powder prepared through the method and a carbon source serve as raw materials, the reaction temperature is set to range from 900 DEG C to 1300 DEG C, and the reaction time ranges from 2 h to 6 h. The BET value of the nano W powder obtained through the method reaches 25.55 m<2>/g, and the BET value of the nano WC powder obtained through the method is larger than 4.0 m<2>/g.

The invention discloses a high-efficiency and energy-saving diamond saw blade and a tungsten steel saw blade, which comprise a saw blade body (1). There are several sawtooth holders (2) with the same shape and size evenly on the edge of the saw blade body (1), and there is an inclined U-shaped chip removal groove between two adjacent sawtooth holders (2). (4), the sawtooth fixing seat (2) is a protrusion whose outer edge is arc-shaped and the front side is higher than the back side, and the positive side of the sawtooth fixing seat (2) is connected with a granular The sawtooth (3) made of diamond or tungsten steel is fixedly connected to the groove provided on the positive side of the sawtooth fixing seat (2) by bonding or welding. The beneficial effect of the invention is that it is easy to repair, the sawtooth can be cut continuously for a long time without deformation, the production efficiency is improved, the production cost is reduced, and it is environmentally friendly.

The invention provides a material formula for a diamond bit. The material formula is characterized by comprising the following components in part by mass: 60-80 parts of iron powder, 10-15 parts of manganese powder, 3-5 parts of chromium powder, 3-8 parts of nickel powder, 2-6 parts of vanadium powder, 10-15 parts of tungsten powder, 1-2 parts of zirconium powder, 3-5 parts of niobium, 1-5 parts of lead powder, 3-8 parts of nano graphite powder, 1-5 parts of molybdenum disulfide powder, 3-12 parts of silicon dioxide powder, 1-3 parts of magnesia powder and 2-4 parts of crystal water.Accordingto the invention, the optimized alloy steel formula is adopted to manufacture the diamond bit; the diamond bit is low in production cost and higher in tensile strength, yield strength and hardness; aplurality of alloy elements including nickle, vanadium, tungsten and the like are added in the components and are uniformly distributed in the internal structure of alloy steel; and moreover, the lubricating components including nano graphite powder and molybdenum disulfide powder are added, and nano graphite powder and molybdenum disulfide powder reduce brittleness and prolong the service life ofthe diamond bit.

The invention discloses a high-precision composite copper alloy wire and a processing technology thereof. The high-precision composite copper alloy wire is prepared from the following raw materials inparts by weight: 88-95 parts of copper, 15-22 parts of neodymium, 11-18 parts of tungsten, 4-7 parts of manganese, 5-15 parts of carbon, 5-15 parts of iron, 10-18 parts of silicon, 2-7 parts of chromium, 2-6 parts of lead, 4-9 parts of nickel, 2-8 parts of tin, 1-4 parts of zirconium, 2-6 parts of antimony and 6-11 parts of magnesium. According to the high-precision composite copper alloy wire disclosed by the invention, by use of 6-11 parts of copper, neodymium, tungsten, manganese, carbon, iron, silicon, chromium, lead, nickel, tin, zirconium, antimony and magnesium respectively, the prepared product of copper wire not only has bright and clean surface and high precision, but also gains the characteristics of high strength, high hardness, high conductivity, high elasticity, wear resistance, fatigue resistance, corrosion resistance, low elastic lag and the like; the operation is easy and convenient, the technology is easy to control, the process is simple, and the product can reach the national standard T3 on copper wire rod for electrical purpose; moreover, the smelting cost is remarkably lowered, and the product quality of the copper wire rod is also guaranteed.

The invention discloses a titanium alloy used for a high performance cutter. The titanium alloy includes, by weight, the following components: 1.0-1.5% of Al, 0.1-0.3% of B, 0.5-1.0% of W, 0.8-1.2% ofCo, 0.2-0.5% of Fe, 0.6-1.0% of Cr, with the balance being Ti and unavoidable impurities. A hardness HRC value of the titanium alloy is increased to 60-62; vanadium is completely replaced by cheap elements of chromium, iron, cobalt, boron and tungsten, so that the cost is greatly reduced, and the cost performance is very excellent; and a preparation method of the titanium alloy is simple, the cost is significantly lower than cost of market products, and the titanium alloy has a very good market prospect.

The invention discloses a metal electrographite brush having high precision and good reliability. The metal electrographite brush is characterized by being prepared from raw materials by weight: 40-60 parts of crystalline flake graphite, 18-28 parts of pitch, 20-30 parts of tungsten disulfide, 3-5 parts of iron powder, 6-9 parts of copper sulphide, 11-15 parts of manganese carbonate, 7-9 parts of copper-antimony alloy powder and an appropriate amount of oleic acid. By adding the copper sulphide, an effect of enhancing conductivity and hardness of brush material is enhanced. By adding manganese carbonate, effects of reducing sintering temperature and improving material compactness are improved. According to the invention, the metal electrographite brush prepared by adopting the scientific formula and a reasonable material proportion has good hardness and conductivity, is high in accuracy, stable in quality, good in reliability and worth of promotion.

An organometallic precursor includes tungsten as a central metal and a cyclopentadienyl ligand bonded to the central metal. A first structure including an alkylsilyl group or a second structure including an allyl ligand is bonded to the cyclopentadienyl ligand or bonded to the central metal.

The invention relates to a preparation method of catalysts and particularly relates to a preparation method of a catalyst for catalytic oxidation synthesizing of acrolein through propylene. The preparation method comprises the following steps of: (1) preparing a composite carrier of silicon carbide and MCM-41; (2) respectively preparing precursor solutions of active ingredients, uniformly mixing and stirring the precursor solutions of cobalt, ferrum and potassium to obtain a mixed precursor solution A, uniformly mixing and stirring the precursor solutions of tungsten and manganese to obtain a mixed precursor solution B, and loading the active ingredients through an impregnation method to obtain the catalyst. When the catalyst for catalytic oxidation synthesizing of acrolein through propylene prepared by the preparation method provided by the invention is applied in a catalytic oxidation synthesis reaction of acrolein through propylene, the reaction temperature is 300 DEG C, the conversion rate of the propylene is 99%, and the yield of acrolein is 87.6%.