44results about How to "Good alloying performance" patented technology

The invention discloses a mechanical alloying preparation method for niobium-silicon powder. The mechanical alloying preparation method comprises the following steps: selecting proper powder, adding the powder into ethylene glycol, stirring, concentrating, adding the mixture into a high-energy planetary ball mill, and carrying out ball milling by adopting grinding balls of different sizes, wherein glucose is used as an antioxidant to perform variable-angle ball milling. According to the method, the oxidation phenomenon in the alloying process is inhibited, and the uniformity of the components in the alloying process is improved.

The invention discloses bainitic steel applied to a frog. The chemical compositions of the bainitic steel comprise, by weight, 0.03% to 0.05% of C, 0.3% to 0.5% of Si, 1.8% to 2% of Mn, no more than 0.007% of P, no more than 0.006% of S, no more than 0.0040% of N, 0.25% to 0.45% of Mo, 0.03% to 0.05% of Ti, 0.6% to 0.8% of Cr, 0.9% to 1.1% of Ni, 0.3% to 0.5% of Cu, 0.020% to 0.040% of V, 0.002% to 0.004% of B, 0.01% to 0.02% of Als, and the balance of iron and unavoidable impurities.

The invention belongs to the technical field of material processing, and particularly relates to a molybdenum alloy target preparation method. Alloy powder is formed by molybdenum powder and other metal powder in a mechanical alloying mode, the alloy powder is processed, and a molybdenum alloy target is obtained. The mechanical alloying process is adopted, so that distribution uniformity and alloying performance of the powder raw materials are better; hot isostatic pressing is conducted after cold isostatic pressing, so that the compactness of the molybdenum alloy target is better; through the multi-stage degassing process, the oxygen content of the molybdenum alloy target is lower, and the degassing performance is better.

The invention discloses a high-reliability cathode component for a vacuum electron device, wherein the ruthenium-vanadium binary alloy high-temperature cored solder taking refractory metal tungsten and molybdenum as base materials consists of the following materials in weight percentage: 23 to 40 percent of vanadium, and the balance being ruthenium and inevitable micro impurities; and the contents of Zn, Pb, Bi and Mg elements in the micro impurities are no more than 0.001 percent respectively. The cored solder can be used to braze-solder refractory metal w, Mo and alloy of w or Mo in the H2 or Ar gas atmosphere or in a vacuum state, the cored solder does not absorb hydrogen, can spread over base metal, and has good wettability; the wet angle is less than 10 degrees; and when a soldering piece is soldered under the vacuum working condition with a temperature of between 1,000 and 1,200 DEG C, the vapor pressure of the cored solder is lower than 1x10<-5>Pa; moreover, the cored solder islow in price, and is the first choice of solder replacing the Pt and Pt-based solder for the braze solder of the cathode component for the vacuum electron device, and the melting temperature of the cored solder is between 1,750 and 1,850 DEG C.

A multi-beam assisted laser-arc hybrid welding method, which relates to the field of material processing engineering, the purpose of the invention is to solve the problem of high-intensity electromagnetic field in the welding process of high-nitrogen steel and other materials in the laser-arc composite heat source welding process The application of the welding gun is limited, and it is necessary to supplement the alloy elements and the arc deviation under the powder feeding condition. The axis is aligned near the tip of the welding wire / tungsten pole, and can be adjusted in the direction perpendicular to the axis of the welding wire / tungsten pole. With the axis of the welding wire / tungsten pole, multiple powder feeding pipelines are attached to the nozzle of the welding torch, and their axes are aligned with the welding wire Near the tip / tungsten pole tip, adjustable in a direction perpendicular to the wire / tungsten pole axis. The invention is applied in the field of welding.

The invention relates to a rare earth carbonic acid cobalt and nickel composite powder and a production method thereof. The composite powder comprises rare earth elements and main components of carbonate and / or bicarbonate, cobalt and nickel, wherein the total mol content of cobalt and nickel is 30-60 % (mol), the mol content of carbonate and / or bicarbonate is 40-70% (mol), the mol ratio of cobalt and nickel is 0.9-1.1, and the weight parts of rare earth elements is 0.3-5%(wt) of the total weight of the cobalt and nickel. According to the invention, rare earth carbonic acid cobalt and nickel composite powder with finer granularity, higher alloying degree and better dispersivity of rare earth additive components at lower cost can be produced.

The preparation method of mechanical alloying includes selecting suitable powder, adding it to ethylene glycol for stirring, adding it to a high-energy planetary ball mill after concentration, using balls of different sizes for ball milling, glucose as an antioxidant, and performing ball milling at variable angles. The present invention suppresses the The oxidation phenomenon in the alloying process improves the composition uniformity of the alloying process.

The invention discloses a railway track welded steel and a manufacturing technology thereof and mainly comprises the contents of chemical ingredients of the railway track welded steel, matching proportions of raw materials and the manufacturing technology thereof; the railway track welded steel contains the chemical ingredients of: 0.05-0.13 of C; not more than 0.3 of Si; 4-7 of Mn; 16-20 of Cr; 10-13 of Ni; 0.9-2.0 of Mo; not more than 0.02 of P; not more than 0.01 of S; 0.1-0.3 of Ti; not more than 0.15 of Cu; and 57.09-68.95 of Fe. The manufacturing technology of the railway track welded steel comprises the procedures: determining the selection range of chemical ingredients-working out a matching proposal according to the range of chemical ingredients-medium frequency smelting-electroslag remelting (refining)-annealing-discharging-forging-hydrogen diffusion treatment-solid solution treatment-mechanical processing-inspection test; the key manufacturing technology comprises the steps: (1) electroslag remelting (refining), (2) forging, (3) hydrogen diffusion treatment, and (4) solid solution treatment; the railway track welded steel is reasonable in matching chemical ingredients, good in alloying effect, large in the change of forging ratio and excellent in tightness of microstructure, and completely adapts to the occasion of heavy track, heavy load and large variation of temperature difference. The railway track welded steel has high indexes of performance, and the index of welding performance guarantees the quality of welded joints and the traveling safety of trains. Various indexes of performance of the product reach or exceed those of domestic and oversea similar products.

The invention relates to a method for preventing an oxidizing slag from being attached to a crucible in an intermediate frequency furnace smelting process. The method comprises the following steps: burdening according to the calculated dosage of the steel material, and reserving 1 / 5 to 2 / 5 of steel material; firstly, adding 3 / 5 to 4 / 5 of steel material to melt down when smelting, scattering lime powder on a slag layer along the circumference of the crucible wall after the slag layer is formed in molten steel, so that the lime powder is stacked between the edge of the slag layer and the crucible wall to form a circle of screen base, and then refilling reserved steel material; moving the liquid level upwards to push the slag layer to float, and forming an isolation zone from the lime powder between the slag layer and the crucible wall, so as to prevent the oxidizing slag from being attached to the crucible wall. By adopting the method disclosed by the invention, the oxidizing slag inside the furnace can be easily removed, the drossing process is time-saving and labor-saving, ramming is avoided, and the crucible of a furnace body is prevented from being damaged.

The invention belongs to the technical field of alloy nanomaterials, and specifically relates to a method for preparing copper-nickel alloy nanomaterials with chamfered biconical morphology characteristics in a hydrophobic phase. Copper salts, nickel salts, complexing agents, and organic solvents are mixed to obtain The mixed solution, the mixed solution is heated and then kept warm for reaction, after the reaction is cooled to room temperature to obtain a reaction solution, and the reaction solution is washed to obtain a finished product. The present invention realizes for the first time the preparation of single-twin chamfered biconical copper-nickel alloy nanomaterials with special morphology in the hydrophobic phase, which expands the limitation of the material morphology; Organic solvents, copper-nickel precursors and complexing agents are required to be mixed, and the heating reaction is enough, without the need for vibration, ultrasonic and other reaction means. The present invention prepares single-twin crystal chamfered biconical copper-nickel alloy nanomaterials with special morphology, which can be Used as a highly active catalyst for coupling reactions and redox reactions.

A high-temp PdNi-based multi-alloy solder for the Ru alloy, Ir alloy and high-temp alloy contains Pd (20-30 wt.%), Au (15-25), Fe (10-20), Co (2-8), W (0.5-6) and Ni (rest).

The invention relates to a locomotive braking resistance tape and a preparation method thereof. The locomotive braking resistance tape comprises the following principal components in percentage by weight: 13.5%-14.5% of chromium, 3.5%-4.5% of aluminum, 0.25%-0.35% of titanium, less than or equal to 0.04% of carbon, 0.05%-0.10% of rare-earth and the balance of iron. The preparation method of the locomotive braking resistance tape sequentially comprises the following steps: vacuum smelting, electroslag remelting, forging, hot rolling, annealing heat treatment, pickling, polishing, trimming, cold rolling, gas protection annealing and strip forming. The locomotive braking resistance tape disclosed by the invention can be used for greatly reducing the production cost by being made of a ferrite alloy without using metallic nickel any longer, enhancing the resistance uniformity of the resistance tape by adopting a titanium element and enhancing the product quality by reducing the resistance temperature coefficient of the resistance tape; the preparation method disclosed by the invention comprises a vacuum smelting procedure and can be used for lessening the sufficient air content of the generated resistance tape, thereby ensuring the product purity.