34results about How to "Good solid solution effect" patented technology

The invention relates to a preparation method of a chromium-aluminum-nitrogen film by closed field unbalanced magnetron sputtering, which comprises the following steps: a chromium-tungsten-manganese steel plate is taken as a basal body, chromium and aluminum as a target source of metal ion, nitrogen gas as reactant gas, and argon gas as ion bombardment gas and protection gas; in a vacuum sputtering furnace, in a closed magnetic field state, in the argon gas and at the temperature of 300 DEG C, the surface of the chromium-tungsten-manganese steel plate is sputtered with chromium ion, aluminum ion and nitrogen ion and the chromium-aluminum-nitrogen hard film is formed on the surface of the steel plate, and then the low temperature tempering and alloying solid solution are conducted, thus greatly improving mechanical property, hardness, intensity, abrasive resistance and erosion resistance of the surface of the chromium-tungsten-manganese steel plate. The mechanical property of the chromium-tungsten-manganese steel plate can be improved by 466% compared with that of hardened steel plates. The preparation method has short process flow, precise technique, accurate and detailed measurement values, the film with thickness of 4,600nm, and the alloy layer with good solid solution effect and being not easy to peel off, thus being the ideal treatment method for strengthening and hardeningthe surface of alloy tool steel.

The invention discloses a method for recycling powder from ITO (indium tin oxide) waste targets for preparing ITO target materials. The method includes adding tin oxide and / or indium oxide powder into gasified recycled ITO powder and distributing the tin oxide and / or the indium oxide powder in the ITO powder; adding water and dispersing agents into mixed powder, carrying out ball-milling on the water, the dispersing agents and the mixed powder to obtain mixtures, then carrying out spray-drying on the mixtures, placing the mixtures in molds, pressurizing the mixtures step by step at stages, compressing the mixtures to obtain initial blanks in such a manner that pressures are kept for certain time after being boosted in each procedure, then boosting the pressures step by step at stages, preparing blanks by means of cold isostatic pressing in such a manner that the pressures are kept for certain time after being boosted in each procedure, carrying out heat-insulation degreasing on the prepared blanks and then burning the blanks in oxygen atmosphere to obtain the ITO target materials. The gasified recycled ITO powder is used as a raw material, the weights of the tin oxide and / or the indium oxide powder are not lower than 5% of the weight of the raw material, and the tin oxide and / or the indium oxide powder are used as sintering activity enhancers. The method has the advantages that the added powder is distributed in the recycled ITO powder, accordingly, the sintering activity of the mixed powder can be integrally improved, and characteristics of the mixed powder in forming and sintering procedures can be changed; the blanks are pressurized step by step at stages in forming procedures and are high in density, and accordingly the relative density of the ITO target materials can reach 99.5% at least.

The invention relates to a high-conductivity, heat-resistant aluminum alloy and a preparation method thereof, belonging to the technical field of aluminum-based alloys, and is made of the following components in mass percentage: 1.5-3.2% Mg, 0.7-2.8% Si, 0.2-0.5% Ni, 0.06-0.25% Co, 0.1-0.2% Zr, 0.1-0.4% Y, the balance is Al and unavoidable impurities with a total content of ≤0.03%. The high-conductivity and heat-resistant aluminum alloy of the invention can remarkably improve its conductivity and heat-resistance, so that it can better meet the requirements of high-voltage power transmission.

The invention relates to the heat treatment field of the nickel-based alloy pipes, and in particular relates to a complex heat treatment method capable of improving a nickel-based alloy pipe. The complex heat treatment method comprises early-stage heat treatment and surface treatment, wherein the surface treatment comprises the steps of pretreatment, coating of a co-permeating agent, co-permeation of ions Al-B and the like. The early-stage heat treatment of the complex heat treatment method is capable of obtaining remarkable effect of dispersion strengthening so that the nickel-based alloy pipe can have excellent mechanical properties; Al-B co-permeation is realized by virtue of ion bombardment, and consequently, the heating temperature of the surface heat treatment of the nickel-based alloy pipe is greatly reduced in contrast with that of the co-permeation in the traditional high-temperature furnace and the permeation rate is remarkably increased in contrast with that of the traditional electrolytic method or high-temperature slurry; especially, the method is capable of effectively improving the properties of the nickel-based alloy pipe such as high-temperature creep resistance and corrosion resistance and thus greatly prolonging the service life of the nickel-based alloy pipe.

The invention discloses a method for preparing a high-strength deformed aluminum alloy based on severe plastic deformation. The steps of the method are: A. cutting a green body from an aluminum alloy ingot; In the press die, the equal-channel angular extrusion process is carried out continuously with multi-temperature steps that gradually increase in temperature, and the severe plastic deformation technology is used to achieve enhanced solution treatment, and after the end of the water quenching treatment, a supersaturated solid solution block extrusion billet is obtained; C, cutting The alloy rod whose length direction is parallel to the direction of equal-channel angular extrusion is produced; the alloy rod is subjected to conventional hot extrusion processing and aging treatment to obtain high-strength deformed aluminum alloy. The present invention utilizes stage-by-stage severe plastic deformation of gradual heating to realize enhanced solid solution treatment, effectively promotes the dissolution of the second phase, and obtains a single-phase solid solution alloy with fine grain size, high-density defects, and high supersaturation, and then through thermal processing And aging treatment promotes the uniform precipitation of nano-precipitated phases, and obtains high-strength deformed aluminum alloys.

A method for preparing AI foil used on low voltage positive electrode of electrolytic capacitor uses weight compositions with 99.980-99.993% of AI, 15-50ppm of Si, 15-50ppm of Fe, 20-60ppm of Cu, 10-15ppm trace amount element of Mg + Mn +Zn +Ga, impurities and allowance as materials to prepare AI foil used on low voltage positive electrode of electrolytic capacitor.

The invention discloses a preparation method of a cerium-zirconium based solid solution. The preparation method comprises the following sequential steps: (1) preparation of Ce<4+>; (2) preparation of active ingredient solution; (3) precipitation reaction; (4) surface modification; (5) roasting. The Ce<4+> is prepared firstly and then mixed with other rare earth ions and positively quadrivalent zirconium ions to obtain a mixed metal nitrate solution; as the mixed metal nitrate solution contains an organic complexing agent, the precipitation speed in the precipitation reaction process is controlled by virtue of complexing coordination of the organic complexing agent and the rare earth and zirconium ions, so that a precursor uniform and stable in particle size is obtained; the surface treatment is performed on the precipitate precursor by use of polyacrylic acid, and therefore, the agglomeration problem of particles in the roasting process is solved, and the pore diameter and the pore volume of the roasted product are increased, and consequently, the cerium-zirconium based solid solution catalytic material excellent in heat stability is obtained. The preparation method is suitable for the preparation of the solid solutions.

A method for improving the structural stability of a BaCo0.7Fe0.2Nb0.1O3-δ oxygen-permeable membrane material belongs to the technical field of oxygen-permeable membranes. The present invention is characterized in that: BaCo0.7Fe0.2Nb0.1O3-δ base material with perovskite structure is doped with Sr element, and the chemical formula of the obtained oxygen-permeable membrane material is Ba1-xSrxCo0.7Fe0.2Nb0.1O3-δ, Wherein x=0.05~0.4. The oxygen-permeable membrane material provided by the method of the present invention significantly improves the phase structure stability of the BaCo0.7Fe0.2Nb0.1O3-δ matrix material under high temperature and low oxygen partial pressure conditions, so that the improved oxygen-permeable membrane material can be used in a wider range It can be applied in the range of oxygen partial pressure and larger oxygen concentration gradient.

The invention relates to a production technology of an alloy tube, in particular to a nickel base alloy tube producing technology for a high-pressure boiler. The nickel base alloy tube producing technology sequentially comprises the steps of centrifugal tube blank casting, tube blank cutting-off, first cold rolling, middle annealing, second cold rolling, finished product heat treatment, physical and chemical inspection, straightening, finishing, eddy current inspection (substituting water pressure tests), tube body detection, ultrasonic flaw detection, mark spraying, packaging, storing and the like. The nickel base alloy tube producing technology is short in production process and capable of greatly reducing the production cycle of the nickel base alloy tube, improving production efficiency and reducing production cost. Moreover, the tube blank is produced in a centrifugal casting mode, so that the material utilization rate is high, and material waste is avoided. The inner surface of the centrifugal casting tube blank is high in roughness degree. An acid washing method is used after centrifugal casting, so that the roughness degree of the inner surface of the centrifugal casting tube blank is reduced. Moreover, two times of deformation are both conducted through cold rolling, so that the hot extrusion process is eliminated, the further arrangement of hot extrusion equipment is eliminated, and production cost is reduced.