23 results about "Molybdenum" patented technology

The invention relates to a micro-electrolytic filler containing a catalyst, which comprises ferrum and carbon and is added with a catalyst. The mass percents of ferrum, carbon and catalyst in the filler are 45-55%, 40-50% and 1-5%, respectively. The catalyst is one or more of the following elements: copper, vanadium, molybdenum and antimony. The invention has the advantages that, firstly, the COD de-electrolyzing rate in wastewater which has large concentration of organic matters, high poisonousness and high chromaticity and is hard to treat biochemically is improved by 10-20%, the COD removing rate is about 35-60%, the chromaticity can be removed by 60-90% and meanwhile the B/C value is improved by 0.1-0.3 and biodegradability of the wastewater is improved; secondly, the cylindrical cellular structure of the filler is beneficial to ensure adequate contract reaction of the filler and water to reduce the flowing resistance of the water; and thirdly, the carbon bed is not easy to passivate and harden and be blocked by iron mud, and the amount of sludge is reduced.

The electrode for high-voltage in-situ impedance spectroscopy measurement of the present invention and its preparation method and application belong to the technical field of in-situ measurement of electrical quantities under high-voltage conditions. The electrode consists of an aluminum oxide protective layer (3) deposited on the surface of the diamond anvil (2) and a metal film electrode (1); the metal film electrode (1) is circular in the center of the anvil surface of the diamond anvil (2), Copper wire (5) is bonded to the metal film electrode (1) on the side of the diamond anvil (2); the metal spacer (4) is used as another electrode, forming an axisymmetric electrode together with the metal film electrode (1) system. Electrodes are prepared by magnetron sputtering, molybdenum coating, aluminum oxide deposition, photolithography and chemical corrosion. The invention solves the problems of electrode fixing and sample cavity insulation, and can ignore the influence of the parasitic capacitance and inductance of the system on the measurement results, making it possible to measure the material impedance spectrum in situ with the diamond anvil under high pressure.

The invention relates to a titanium-carbide-based steel-bonded cemented carbide material which is characterized in that titanium carbide (TiC) is adopted as a hard base of the material, and alloy tool steel is adopted as a binding phase. The volume percentage of the titanium carbide is 35-45%, and the mass percentage of the alloy tool steel is 55-65%. A total mass of the titanium carbide and the alloy tool steel is 100%. The alloy tool steel is composed of chromium, molybdenum, aluminum, nickel, titanium, and iron. According to the invention, the alloy material is prepared with an advanced low-pressure hot-isostatic-pressing sintering technology. The production process is simplified, production efficiency is improved, and energy consumption is greatly saved.

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 belongs to the field of composite materials, relating to a molybdenum fibre reinforced resin concrete material. The molybdenum fibre reinforced resin concrete material comprises adhesive kinetosome and aggregate, wherein the adhesive kinetosome is a resin system formed by mixing composite resin, curing agents, diluents and flexibilizers, and the aggregate is of granite particles or gravel particles. The invention is characterized in that the molybdenum fibre reinforced resin concrete material also comprises molybdenum fibre. The raw materials are in following percentage by weight: 9-20% of the adhesive kinetosome, 77-90% of the aggregate and 0.1-3% of the molybdenum fibre. The molybdenum fibre adopts WEDM to cut and process scrapped molybdenum wires; after being cleaned, the molybdenum wire is cut into the molybdenum fibre with required length; and if the molybdenum fibre the surface of which is smooth is adopted, a corresponding processing method needs to be adopted to process the surface thereof so as to increase the bonding strength between the molybdenum fibre and resin and improve reinforcement effect. The composite material has favourable physical and mechanical properties; compared with no-fibre reinforced resin concrete material, the compression strength of the molybdenum fibre reinforced resin concrete material is improved by 15-30%. The molybdenum fibre reinforced resin concrete material can serve as favourable mechanical basic part material.

The invention discloses a boron-bearing chromium molybdenum nickel wear-resistant alloy comprising the following chemical components: 0.30-0.50% of C, 0.8-2.6% of B, 0.5-1.8% of Mn, 0.4-1.0% of Si, 4.0-6.0% of Cr, 2.0-4.5% of Mo, 0.8-2.0% of Ni, 3.5-5.5% of V, 0.02-0.04% of Ce, 0.02-0.04% of La, 0.10-0.20% of Mg, 0.01-0.03% of Ca, 0.05-0.10% of Ba, 0.040 or less of S, 0.040 or less of P, and balance of Fe and unavoidable impurities; the preparation steps include melting and heat treatment; the present invention aims to provide the boron-bearing chromium molybdenum nickel wear-resistant alloy which is safer, more wear resistant, and better in toughness, and also aims to provide a preparation method which is simple and easy to operate, simple in technological process and low in cost for preparation of the boron-bearing chromium molybdenum nickel wear-resistant alloy.

The invention provides the high-strength 23Mn2CrNiMnVERA steel for railway train connection and a preparation method thereof. The 23Mn2CrNiMnVERA steel comprises the following components of carbon, silicon, manganese, vanadium, aluminum, chromium, molybdenum, nickel, cerium, copper, phosphorus, sulfur, Fe and non-removable impurities; the preparation method comprises the steps of molten iron pretreatment, converter smelting, LF refining, VD vacuum refining and continuous casting tapping. The high-strength 23Mn2CrNiMoVREA steel for connection has the advantages of being easy to weld, high in tensile property and high in yield strength at low temperature (-60 DEG C); and the preparation method of the high-strength 23Mn2CrNiMnVERA steel for the railway train connection has the advantages of being easy to control in the process and suitable for popularization.

The invention relates to a high-temperature-resistant high-performance rare earth permanent magnet material. The high-temperature-resistant high-performance rare earth permanent magnet material is prepared from, by weight, 20-35% of rare earth elements, 0.8-1.5% of boron, 0.02-0.2% of molybdenum, 0.5-5% of silicon, 0.1-3% of vanadium, 0.02-0.5% of calcium, 0.02-0.5% of zirconium, 0.02-0.5% of chromium, 0.5-5% of nickel and the balance iron and inevitable impurities. The rare earth permanent magnet material has high high-temperature resistance and excellent mechanical performance and is low in cost and high in stability, a preparation method is simple, and large-scale industrial production can be easily achieved.

The invention relates to a special fertilizer and in particular relates to a fertilizer special for pasture. The fertilizer special for pasture is characterized by comprising the following components in parts by weight: 8-12 parts of urea, 12-16 parts of potassium sulfate, 14-18 parts of calcium superphosphate, 10-15 parts of special filler and 3-4 parts of mixed micro element fertilizer. According to the fertilizer special for pasture, provided by the invention, the yield of the pasture is increased by 10-20 percent, the absorption accumulation amount of nutritive indexes such as crude proteins, crude fats, molybdenum, cobalt, selenium and the like in the pasture is improved by over 10 percent, and the produced pasture is safe to utilize, comprehensive in nutrition and high in additional value.

The invention discloses a novel powder metallurgical gear. The novel powder metallurgical gear is prepared from iron powder, copper powder, molybdenum powder, vanadium powder, nickel powder, yttrium powder, aluminum powder, magnesium powder, cobalt powder, lead powder, steel slag powder, cupola slag powder, ferroalloy slag powder, modified tree ash powder, graphite powder, epoxidized butyl stearate, silicone oil, methylcellulose, aluminum stearate, polyethylene glycol, ethylene bisstearamide, stearic acid, carbon fibers, glass fibers, boron nitride, epoxy propoxy propyl trimethoxysilane, silica, manganese sulfide, acrylate, an inhibitor, a binder, an enhancer, a cutting agent, a lubricant, a coupling agent and a dispersion agent. According to the novel powder metallurgical gear, through the specific composition proportion, the novel powder metallurgical gear is even in overall density, high in density, high in ductility and area percentage reduction, good in wear resistance, strength and hardness, high in material utilization rate and suitable for quickly producing high-performance gears on a large scale.

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 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 discloses a smelting method for rare-earth microalloyed steel. The smelting method can be used for smelting the rare-earth microalloyed steel. By controlling the temperature, the vacuumdegree and the contents of sulfur, rare earth, oxygen, aluminum and phosphorus, high-precision and high-purity steel which is low in content of impurities and satisfies production requirements is obtained through twice smelting. In a smelting process, original vanadium (niobium, chromium, molybdenum and titanium) alloying elements in molten iron are effectively prevented from being oxidized and burnt, so that follow-up addition of vanadium (niobium, chromium, molybdenum and titanium) is reduced. Besides, the contents of sulfur, phosphorus, oxygen and aluminum in molten iron are reduced beforeadding of rare earth alloy, so that the amount of rare earth alloy which is oxidized and vulcanized is reduced, and the addition of rare earth alloy in steel is effectively reduced. Meanwhile, formation of aluminic acid rare earth, phosphoric acid rare earth or phosphoric rare earth occluded foreign substances is reduced, so that the quality of an end product is improved. By adoption of the smelting method, the smelting cost is lowered, and beneficial effects in smelting rare earth containing vanadium (niobium, vanadium, chromium, molybdenum and titanium) steel are improved.

The invention discloses a molybdenum/steel connector and a preparation method thereof. A connecting layer of the molybdenum/steel connector has a sandwich type three-layer structure and comprises twoNi76CrP solder layers for being connected with molybdenum and steel correspondingly and a metal foil layer located between the two Ni76CrP solder layers. The preparation method comprises the followingsteps that 1, a proper amount of Ni76CrP welding powder is taken, glycerol is added to be blended, and Ni76CrP paste solder is obtained; and 2, the to-be-connected end faces of a steel block and a molybdenum block are coated with each coated with a layer of Ni76CrP paste solder obtained in step 1, then metal foil is placed between the two Ni76CrP paste solder layers, the steel block and the molybdenum block are closed, finally the load of 10 kPa is applied, overall brazing is carried out, brazing is carried out under the vacuum condition, the temperature is raised to 1000 DEG C to 1100 DEG C,heat preservation is carried out for 10 min, and the molybdenum/steel connector is obtained. The preparation method is simple and easy to operate, and raw material cost is low. The prepared molybdenum/steel connector is even and dense in layer, good in interface bonding, free of cracks and pores and other defects and high in connecting strength.

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 barium-tungsten cathode with high current density and the preparation method of the cathode. The barium-tungsten cathode comprises a cathode molybdenum tube (3) and a double-layer substrate filled in the cathode molybdenum tube (3), wherein the double-layer substrate includes an upper layer and a lower layer; the upper layer is a spherical tungsten powder layer (1) formed by pressing spherical tungsten powder serving as a substrate material and the particle size of the tungsten powder is 4mu m; the lower layer is a tungsten-rhenium alloy layer (2) formed by pressing tungsten powder and rhenium powder which are mixed to serve as the substrate material; and the tungsten powder and the rhenium powder are uniformly mixed in a ratio of 20%:80%. In the barium-tungsten cathode with high current density and a unique structure, the double-layer substrate is adopted, wherein the upper layer is formed by pressing the tungsten powder which has specific shape and specific particle size and serves as the substrate material; and the lower layer is formed by pressing the tungsten powder and the rhenium powder which are mixed to serve as the substrate material, the current density of 100A/cm<2> can be stably supplied, the requirements of high-power and high-frequency microwave devices on the cathode are met, and a powerful guarantee is provided for the development of the microwave devices.

The invention discloses a color ring chip inductor with high stability. The shape of the color ring chip inductor is manufactured according to the shape of a standard chip inductor and is marked according to a marking method of the color ring chip inductor; the color ring chip inductor is further provided with a shielding layer; a magnetic core is a molybdenum permalloy magnetic core with high stability and contains 3.2%-3.8% of molybdenum, 15.8%-17.2% of iron and 79%-81% of nickel; an inductance stability numerical value is not higher than 0.03% and an initial inductance deviation range numerical value is not higher than 0.3%; a packaging material is epoxy resin; a winding is an insulating varnished wire; and two metal pins are sheet-shaped and are arranged at the bottom of the color ring chip inductor. The invention further discloses a manufacturing method of the color ring chip inductor, comprising the steps of winding wires, insulating and curing, welding, packaging, marking and the like. The color ring chip inductor disclosed by the invention is stable in induction property, is not sensitive to temperatures, is long in service life and can be used for color ring induction/chip induction.

The invention provides a modified catalyst for gaseous-state elemental mercury oxidation and a preparation method of the modified catalyst, belonging to the technical field of mercury removal from smoke. The catalyst is the modified catalyst formed by loading a catalysis component manganese chloride, and a doping modification component ammonium molybdate on a catalytic carrier, wherein the total load of molybdenum, manganese and chlorine is 1.25-25 wt%, and the molar ratio of the three elements is (0.007-0.14): 1: 2. Experimental results indicate that via the preparation method, the three elements molybdenum, manganese and chlorine can be uniformly dispersed on the catalytic carrier to inhibit the grain agglomeration of the catalyst during the preparation process and form a more stable aggregate, thus effectively increasing the efficiency of oxidation for gaseous-state HgO; and the catalyst is very strong in catalytic oxidation performance and sulphur-resistant performance for the gaseous-state HgO in a temperature ranging from 100 to 200 DEG C, and long in endurance time; and the catalytic oxidation efficiency of converting the gaseous-state HgO to Hg<2+> is greater than 97%.

The invention belongs to the technical field of metal ion detection in mine and environment and particularly relates to an on-line detector for molybdenum concentration in a water solution. The detector is used for detecting the molybdenum concentration in a uranium and molybdenum mine hydrometallurgy process in our country. The detector includes a circuit system and a chemical flow path system. The circuit system is disposed in the upper part of a machine case and includes a power supply, a microcomputer system, a control and driving circuit, a photometric detection circuit, and a signal output circuit; the chemical flow path system is disposed in the lower part of the machine case and includes a peristaltic pump and an electromagnetic valve. The microcomputer system outputs a control signal for driving the peristaltic pump and the electromagnetic valve to work by means of the control and driving circuit; a to-be-tested solution generates a light absorption signal through the photometric detection circuit; the microcomputer system collects the signal and calculates and converts the signal into a light absorbance value; and on the basis of the light absorbance value, the concentration of a to-be-tested substance in the sample is calculated; finally the signal output circuit sends a detection result and an operating state signal to an external device so as to achieve remote monitoring. The on-line detector can satisfy detection demand and long-term monitoring demand in a complex environment such as mine and the like.

The invention discloses a new type of rack, which comprises a rack body (3), gear teeth (1) are arranged on the rack body (3), and a bearing ring (2) is arranged inside the rack body (3). A special coating (4) is provided on the surface of the gear teeth (1), an oil storage grid (5) is arranged on the rack body (3), and a guide strip (6) is arranged on the oil storage grid (5). The beneficial effects of the present invention are: the components and proportions of the rack provided by the present invention are moderate, which greatly improves the heat resistance and heat dissipation of the rack, thereby ensuring the normal operation of the rack and prolonging the service life of the rack. The rack does not contain scarce elements nickel, molybdenum and manganese, and the manufacturing cost is low. At the same time, the gear has fewer components, which makes the manufacturing process easier, thereby reducing the manufacturing cost. The special coating can increase the service life of the gear teeth , Increase work efficiency.