14results about How to "Improves ingredient uniformity" patented technology

This invention discloses a method for preparing high-purity oxygen-free copper, relating to the field of metallurgical technology. The method includes multi-stage electrolytic refining, gradient-heating vacuum melting, inert gas-protected refining, electron beam melting, hydrogen plasma arc melting, directional solidification, and post-treatment steps. The multi-stage electrolytic refining utilizes a specific component electrolyte and periodically commutated current; vacuum melting is combined with bidirectional electromagnetic stirring; inert gas-protected refining is combined with a gradient reduction composite covering agent; electron beam and hydrogen plasma arc melting achieve deep purification and deoxidation; and directional solidification and two-stage annealing ensure product performance. The high-purity oxygen-free copper prepared by this invention has a conductivity of 102.3% IACS, a copper content ≥99.9999%, and an oxygen content <1.0 ppm. It exhibits high purity, low oxygen content, and excellent conductivity. The process is stable and controllable, making it suitable for high-end electronics applications.

The utility model relates to the technical field of alloy block smelting, and discloses a mother alloy block smelting furnace which comprises a base plate, the top of the base plate is fixedly connected with a supporting frame, the interior of the supporting frame is fixedly connected with a melting tank, the top of the melting tank is fixedly connected with a feeding frame, and the top of the melting tank is provided with a vacuum pump. A motor is fixedly connected to the top of the melting tank, a transmission roller is fixedly connected to the output end of the motor, a first fixing rod is fixedly connected to the outer wall of the transmission roller, a second fixing rod is fixedly connected to the outer wall of the transmission roller, and a stirring assembly is arranged on the outer wall of the second fixing rod; the stirring assembly comprises a stirring rod and a scraping claw. According to the stirring device, the output end of the motor drives the transmission roller to rotate, so that the effect of stirring the middle part and the bottom of the melting tank is achieved, the problem of non-uniform components of materials in the melting tank caused by difficulty in fully stirring the middle part and the bottom is solved, and the component uniformity of a master alloy block is improved.

The preparation method comprises the following steps: weighing raw materials for preparing the sputtering target material according to a preset stoichiometric ratio, mixing zinc oxide powder and manganese oxide powder in ethanol, carrying out wet grinding for 2-4 hours, adding Cu powder, W powder and Ta powder, continuously carrying out wet grinding for 1-20 hours, drying, and screening to obtain mixed nano powder; filling the mixed nano powder into a graphite mold, putting the graphite mold into a hot pressing furnace, carrying out hot pressing sintering in a vacuum environment at 900-1100 DEG C, cooling, demolding, taking the material, and machining to obtain a sputtering target material in a target shape; the special requirement of the blue light storage recording layer is focused, the optical performance is optimized through a ZnO doping system, the raw materials adopt a segmented grinding process, and the problems that raw material powder is agglomerated and metal powder is prone to sinking in the mixing process are solved; the obtained target material has the advantages of excellent resistivity (less than 50 * 10 <-4 > omega.cm) and high density (gt, 95%), the coating film transmittance of the prepared target material is more than 85%, and the requirement for a high-performance blue light storage recording layer is met.

A method for preparing gradient cemented carbide based on differentiated ball milling and using pre-alloyed cobalt-nickel as the binder phase includes the following steps: (1) preparation of pre-alloyed cobalt-nickel binder powder; (2) preparation of surface mixed powder; (3) preparation of core mixed powder; (4) spark plasma sintering. This invention pre-alloys Co powder and Ni powder, which is beneficial for improving the compositional uniformity and distribution uniformity of the CoNi binder phase, and for ensuring stable distribution of the binder phase during sintering; differentiated ball milling of the surface layer and core layer establishes the interlayer structure basis of the gradient cemented carbide from the powder source; the gradient structure gives the surface layer higher hardness and wear resistance, and the core layer better toughness and crack resistance, achieving a unified matching of high surface hardness and high core toughness; densification is achieved by pre-pressing combined with spark plasma sintering, resulting in a gradient cemented carbide with clear layered structure characteristics and excellent comprehensive service performance.

This invention discloses an automatically target-changing pulsed laser deposition apparatus and method. The apparatus includes a process chamber, a transfer valve, and a buffer chamber. The process chamber is connected to the buffer chamber via the transfer valve and is configured as an internal vacuum chamber. The buffer chamber has a door at its upper part and operates as a vacuum chamber. A sample stage is located on the upper inner side of the process chamber. Two neck tubes are located on the two sides of the process chamber for guiding an external laser source and mounting a laser detection device, respectively. The process chamber also includes a rotatable target stage for loading and unloading targets from the buffer chamber. The buffer chamber includes a rotating target stage mechanism and a vision camera for placing the target material and recording the bottom features of the target material, respectively. This invention provides an automatically target-changing pulsed laser deposition apparatus and method with a compact structure, precise positioning, and automatic target changing capabilities, enabling fully automated deposition of ultrapure thin films.

The application provides an aluminum-molybdenum-iron intermediate alloy, wherein the mass percentage of each element in the aluminum-molybdenum-iron intermediate alloy is as follows: molybdenum: 55.0-60.0%, iron: 30.0-35.0%, oxygen: 0.01-0.1%, nitrogen: 0.001-0.05%, silicon: 0.01-0.2%, carbon: 0.01-0.05%, and the balance is aluminum. The application also provides a preparation method of the aluminum-molybdenum-iron intermediate alloy. The application also provides a method for preparing a titanium alloy ingot by using the aluminum-molybdenum-iron intermediate alloy. The application uses the aluminum-molybdenum-iron intermediate alloy as a raw material for vacuum self-consumption smelting, so that the content of iron and molybdenum in a high-iron and high-molybdenum titanium alloy ingot with a diameter of Ф550mm- Ф750mm is less than or equal to 0.2wt% in different regions, and the composition uniformity is effectively improved.

The invention discloses a device and a method for preparing a quasicrystal film through magnetron sputtering. The device comprises a closed sputtering cavity, a magnetron sputtering mechanism, a quasicrystal film forming mechanism, a working gas circuit and an annealing heating mechanism, the magnetron sputtering mechanism and the quasicrystal film forming mechanism are respectively mounted on the bottom wall and the top wall in the closed sputtering cavity; the fluid outlet end of the working gas path is in fluid communication with the gas inlet of the closed sputtering cavity, and the gas outlet of the closed sputtering cavity is in fluid communication with the fluid inlet end of the working gas path. The method comprises the following steps: forming a sputtering atmosphere in a closed sputtering cavity by using a working gas path, and depositing an amorphous precursor film on the surface of a quasi-crystal substrate of a quasi-crystal film forming mechanism through a magnetron sputtering mechanism; and forming a vacuum inert atmosphere in the closed sputtering cavity by using a working gas path, and carrying out vacuum annealing treatment on the amorphous precursor film by using an annealing heating mechanism to generate the quasi-crystal film. The problems that an existing quasi-crystal film is low in component control precision, insufficient in quasi-crystal phase content and the like can be solved.

The invention provides a superfine dispersion aluminum-molybdenum intermediate alloy for an aluminum alloy and a preparation method of the superfine dispersion aluminum-molybdenum intermediate alloy. The aluminum-molybdenum intermediate alloy provided by the invention comprises the following components in percentage by mass: 4.5-5.5% of Mo, less than or equal to 0.10% of Si, less than or equal to 0.20% of Fe and the balance of Al, the second phase particle size of the microscopic structure is less than 50 microns, and is reduced by more than 60% compared with that of a product prepared by a conventional doping method; according to the test of an AA TP-2 method, the sufficient dissolving time of the aluminum-molybdenum intermediate alloy is within 10 minutes, and the dissolving speed of the aluminum-molybdenum intermediate alloy is increased by more than 50% compared with that of a conventional doping method. The superfine dispersion aluminum-molybdenum intermediate alloy provided by the invention is prepared by adopting a gradient component control method; compared with a traditional molybdenum and aluminum opposite doping method, the obtained aluminum-molybdenum intermediate alloy is remarkably improved in structure and high in dissolution rate; and the quality defects of composition segregation, coarse structure and the like caused by insufficient dissolution of the second phase after the molybdenum element is added are avoided.

This invention discloses a method for preparing Ti60 high-temperature titanium alloy ingots, relating to the field of titanium alloy technology. Based on the target composition range of the Ti60 high-temperature titanium alloy ingot, the proportions of each alloying element in the ingot are determined as follows: Al: 5.8-7.2%, Sn: 3.2-4.3%; Zr: 2.7-3.8%; Mo: 0.3-0.9%; Si: 0.3-0.5%; Nb: 0.3-0.6%; Ta: 0.8-1.4%; C: 0.05-0.07%. By determining a reasonable proportion range for each alloying element, the various elements of the Ti60 titanium alloy achieve synchronous melting and uniform distribution within a limited melting time, suppressing elemental segregation and improving the compositional uniformity of the Ti60 titanium alloy. Furthermore, by first utilizing the high energy density and excellent refining capabilities of the electron beam cold hearth furnace, and then further adjusting the composition and structure through a vacuum consumable arc furnace, the compositional uniformity and purity of Ti60 high-temperature titanium alloy ingots are effectively improved, expanding the application of titanium alloy materials in petrochemical, aerospace, nuclear power generation, hydrogen storage, and military industries.

The invention provides a perovskite thin film double-sided annealing method and device, and relates to the technical field of perovskite solar cell preparation, in the perovskite thin film double-sided annealing method provided by the invention, a temperature cooperative control strategy taking accurate control of a real-time temperature difference between an upper heating plate and a lower heating plate as a core constraint condition is adopted, and the perovskite thin film double-sided annealing effect is achieved. On the basis of double-sided heating, the longitudinal temperature gradient of the perovskite thin film in the annealing process is actively and accurately regulated and controlled, and the problems of disordered crystal orientation, poor thin film quality and the like caused by unbalanced heating of a heat source are effectively avoided, so that the crystal quality, the component uniformity and the interface stability of the perovskite thin film are remarkably improved, and the service life of the perovskite thin film is prolonged. And a process guarantee is provided for preparing a high-performance and high-reliability perovskite photoelectric device.

The application provides a method and device for double-kidney-shaped light spot laser narrow-gap welding, and the method comprises the following steps: (1) performing base layer welding in the welding space of a workpiece to be welded, and performing weld cleaning to obtain a first welding piece; the weld of the workpiece to be welded comprises a weld surface and a groove surface on the weld surface; (2) performing double-kidney-shaped light spot laser welding in the welding space of the first welding piece, wherein the light spot of the double-kidney-shaped light spot laser welding simultaneously acts on the side wall of the groove surface and the corner of the weld surface of the workpiece to be welded, the welding wire is swung in the process, the first pass of the filling layer is completed, and then the weld is cleaned; and (3) repeating step (2) until the welding is completed. The application has excellent welding effect for low-temperature steel with a narrow gap, and can be applied to the welding of nuclear fusion steel.

The present application relates to the metallurgical technology field, especially relate to a kind of off-oven refining combined vacuum arc remelting preparation ultra-pure stainless steel method.The preparation method of the present application is by AOD station to transfer the crude molten steel obtained by EAF smelting to AOD refining furnace to blow oxygen refining, pre-reduction refining slag is CaO-CaF2-SiO2-MgO slag system;After pre-reduction treatment, reduction treatment is carried out, and the reduction refining slag is CaO-CaF2-SiO2-MgO slag system;The molten steel after reduction treatment is transferred to VD furnace for vacuum treatment, and the treated molten steel is transferred to ladle, then poured into mold, and ingot is obtained;After ingot is forged into electrode, ultra-pure stainless steel is prepared by VAR, with ultra-high cleanliness, coarse system inclusions is 0 level, fine system A+B+C+D inclusions≤0.5 level, effectively realize the accurate low control of aluminum content in steel, and simultaneously reduce the oxygen content and non-metallic inclusion content in steel, finally prepare high-quality ultra-pure stainless steel.

The invention relates to the technical field of crystal growth, in particular to a crystal growth method adopting a high-pressure inert atmosphere edge-defined film-fed crystal growth method, which comprises the following steps of: melting a crystal raw material and a doping agent under 6-10MPa inert gas, growing a crystal by a Czochralski method, and adopting staged dynamic pressure regulation during growth, the method comprises the following steps: sequentially carrying out neck (6-8 MPa), shouldering (linearly reducing to 4-6 MPa), equal-diameter (constant 4-6 MPa) and ending (reducing to 3-4 MPa) stages, adopting a double-layer structure, adopting a high-density solid body as the inner layer, enabling the aperture to be 102-108% of the target diameter, and arranging a spiral micro-channel on the side wall; the outer layer is a porous material, the porosity is 15-25%, annealing is carried out after growth, and pressure relief is carried out in stages: when the pressure is greater than 1 MPa, the pressure is released at 0.2-0.3 MPa / min, and when the pressure is less than 1 MPa, the pressure is slowly reduced to normal pressure at 0.05-0.15 MPa / min, so that the wastage rate of volatile components can be controlled below 0.5%.

The invention relates to the technical field of metal material preparation, and discloses a niobium-titanium alloy multi-time smelting plate forming process method based on an EB furnace, which comprises the following steps: step 1, completing raw material charging in a smelting cavity according to a preset proportion; 2, the raw materials are subjected to primary fusion in a preset vacuum environment, and the raw materials are preliminarily fused and flatly laid in a smelting cavity; 3, the melting power is increased, and the melt is homogenized through secondary melting; 4, the melting power is reduced, the three-time melting environment is kept till a plate-shaped object is formed, and leveling treatment is conducted on the surface of the plate-shaped object; fifthly, the plate-shaped object in the fourth step is turned over, and the melting environment is continuously kept for three times till a finished plate is formed; according to the method, the component uniformity is improved, surface pits and internal cracks are reduced, the product yield is improved, and the energy consumption is reduced.