27results about How to "Uniform grain size" patented technology

The invention relates to the technical field of alloys, in particular to a Ni3Al-based alloy, a test bar, a turbine disc and a preparation method of the Ni3Al-based alloy. The invention discloses a Ni3Al-based alloy which comprises the following components in percentage by mass: 7%-9% of Al, 7%-8.5% of Cr, 0.13%-0.24% of C, 0.5%-2% of Ti, 3%-6% of Mo, 1%-3% of W, 1%-2% of Hf, 0.005%-0.03% of B and the balance of Ni. According to the Ni3Al-based alloy disclosed by the invention, all the elements are coordinated and matched, so that the Ni3Al-based alloy has a long-range ordered crystal structure, a stable high-temperature phase structure and excellent oxidation resistance, mechanical property and high-temperature property.

The invention relates to a preparation method of a copper-phosphorus alloy, in particular to the field of copper-phosphorus alloys, and the preparation method comprises the following steps: carrying out vacuum melting on a copper material, adding a copper-phosphorus intermediate alloy, then carrying out cooling and heating operations for at least three times, and casting to obtain the copper-phosphorus alloy, wherein the cooling and heating operation comprises cooling, first heat preservation, heating and second heat preservation which are carried out in sequence; the initial temperature of cooling ranges from 1200 DEG C to 1300 DEG C; the cooling range is 90 DEG C to 120 DEG C; the temperature rise range is 90 DEG C to 120 DEG C. According to the preparation method provided by the invention, by adopting the designed preparation process and by virtue of specific temperature lowering and raising operation, preparation of the copper-phosphorus alloy cast ingot with uniform phosphorus distribution and uniform grain distribution is realized, and the utilization effect of the copper-phosphorus alloy is favorably improved.

The invention discloses non-magnetic drill collar steel capable of improving stress corrosion resistance and a preparation method of the non-magnetic drill collar steel. The preparation method of the non-magnetic drill collar steel for improving the stress corrosion resistance comprises the steps of electric furnace smelting, AOD smelting, LF refining, continuous casting, electroslag, cogging, solution treatment and low-temperature forging. The non-magnetic drill collar steel for improving stress corrosion resistance comprises the following chemical components in percentage by mass: 0.02%-0.06% of C, less than or equal to 0.45% of Si, 20.0%-22.5% of Mn, less than or equal to 0.03% of P, less than or equal to 0.01% of S, 17.0%-20.0% of Cr, 0.90%-3.50% of Ni, 0.6%-2.0% of Mo, 0.6%-0.8% of N, less than or equal to 0.01% of B, more than or equal to 31% of PREN (Cr + 3.3 Mo + 16N), and the balance of Fe and inevitable impurities. According to the method, a high-alkalinity slag system and Al are adopted for deep deoxidation, a 40F pre-melting slag system is adopted for electroslag, argon filling protection is conducted, so that the steel billet is low in oxygen and high in purity, the round steel with the uniform grain size is forged through fast forging cogging high-temperature solid solution and low-temperature forging strengthening, the conventional mechanical performance, the non-magnetic performance, the intergranular corrosion resistance and the like are improved, and meanwhile the long stress corrosion service life is achieved.

The invention relates to the field of new energy batteries, in particular to a chloride solid electrolyte, a preparation method thereof and a battery, the chloride solid electrolyte comprises LiaMbFecLadCl3, M is selected from at least one of Al, Ce, Zr, Mg, Cr and Ca, 0 lt; a is less than or equal to 0.4, 0lt; b is less than or equal to 0.75, 0lt; c is less than or equal to 0.167, 0 lt; d < = 0.167; the method comprises the following steps: S1, mixing LiCl, a water-containing chloride of an element M, FeCl3. 6H2O and LaCl3. 6H2O with water to obtain a first material; s2, drying the first material to obtain a precursor; and S3, carrying out grinding treatment on the precursor. The chloride solid electrolyte can obviously improve the cycling stability of the all-solid-state lithium metal battery.

The invention discloses a composite complexing agent and a chemical copper plating solution. Wherein the composite complexing agent comprises a heterocyclic complexing agent, linear fatty amine and an amino acid copolymer, and the amino acid copolymer is a copolymerization product of aspartic acid and glutamic acid. The chemical copper plating solution comprises a composite complexing agent, bivalent copper ions, a pH regulator, a stabilizer, a reducing agent and water. According to the invention, the problem of poor binding force between a copper plating layer prepared by a traditional chemical copper plating solution and a base material on the low-roughness base material is solved.

The present application relates to a kind of ceramic materials for 5G medium filter and preparation method thereof.The chemical composition of the ceramic material for 5G medium filter is x CBZS glass-(1-x) Mg 0.95 Ca 0.05 Ti 0.95 (Zn 1 / 3 Nb 2 / 3 ) 0.05 O3, wherein wt%≤x≤wt%;The composition of the CBZS glass includes: 40-60 mol% CaO, 10-25 mol% B2O3, 25-45 mol% ZnO, 10-20 mol% SiO2.

This invention discloses a nanocrystalline alloy magnetic core and its preparation process. The invention relates to the field of magnetic materials technology and comprises the following components by weight percentage: 81%–85% pure iron, 0.8%–1.2% pure copper, 8%–10% ferrosilicon, and 5.5%–8.5% ferroboron. This nanocrystalline alloy magnetic core and its preparation process, by uniformly spirally winding copper sheets around the inner and outer sides of the magnetic core, can delay the heating of the inner and outer surfaces of the core, reduce the temperature difference between the center of the core and the inner and outer sides, and make the temperature distribution in the center and sides of the core more uniform. This promotes more uniform elimination of internal stress and facilitates simultaneous nucleation and growth at different locations of the core during the second annealing step, resulting in more uniform grain size at the inner and outer locations of the core, thereby improving the core performance.

The present invention relates to a streamlined vibration quenching nucleation device and operation method, the device comprising: a crystallizer, arranged below an immersed water inlet at the bottom of an external tundish; a liquid metal cooling pool arranged on the side of the crystallizer; a cooling fan arranged on the side of the liquid metal cooling pool, thereby cooling the liquid metal cooling pool; a quenching nucleator arranged inside the crystallizer and connected with the liquid metal cooling pool, the quenching nucleator being streamlined; a cooling pipeline arranged between the liquid metal cooling pool and the quenching nucleator; a variable frequency pump arranged in the cooling pipeline; a vibration generator sleeved in the cooling pipeline and arranged between the variable frequency pump and the quenching nucleator; a baffle assembly arranged inside the quenching nucleator. The present invention sets the quenching nucleator to a streamlined shape, reduces the thickness of the solidified structure on the surface of the quenching nucleator, promotes the peeling of the crystal nucleus and the melting of the dendrite, increases the number of equiaxed crystal nucleus particles, and improves the internal quality of large continuous casting billets.

The invention discloses a thick and high-strength hydrogen container steel plate and a manufacturing method thereof, belonging to the technical field of steel plate preparation. The chemical composition of the thick and high-strength hydrogen container steel plate of the invention is as follows by weight percentage: C: 0.13% to 0.15%, Si: 0.12% to 0.16%, Mn: 0.25% to 0.29%, P: ≤0.006%, S: ≤0.006%, Cr: 1.8% to 2.0%, Mo: 0.65% to 0.9%, Nb: 0.13% to 0.16%, Cu: 0.04% to 0.1%, Sn: ≤0.003%, As: ≤0.003%, Sb: ≤0.003%, and the rest is Fe and unavoidable impurities. The present invention adopts a preparation process of staged rolling and normalizing + tempering heat treatment to ensure that the finished steel plate has uniform grain size and high strength throughout the thickness direction while having good welding performance and meeting the requirements of low welding crack sensitivity.

The invention belongs to the technical field of non-ferrous metal processing, and relates to a fine-grain Nimonic90 high-temperature alloy bar and a forging method and application thereof. The cast ingot is prepared by adopting a duplex smelting process of vacuum induction smelting and vacuum consumable remelting, the content of inclusions and impurity elements of the cast ingot is low, the purity is high, micro segregation can be effectively controlled by a small ingot type, and an ideal blank is provided for obtaining a uniform and small forged structure for a subsequent bar after high-temperature homogenization; furthermore, finished product forging is utilized, and a uniform and fine forged structure is obtained; meanwhile, double-V-anvil deformation is adopted, and the residual stress level of the bar is greatly improved; after the heating number of finished product forging, stress relief annealing treatment is added, long-time heat preservation is conducted at the temperature slightly lower than the grain growth temperature, and residual stress existing in the bar is eliminated; and therefore, an ideal structure with the uniform forged grain size of 7-8 levels and the uniform grain size of 4-5 levels after high-temperature solid solution heat treatment of the high-temperature alloy bar is obtained.

The invention relates to the technical field of high-temperature alloy manufacturing, and discloses a GH4169 alloy small-specification bar and a preparation method thereof.The method comprises the steps that a GH4169 alloy cast ingot is subjected to two-stage homogenization treatment; performing forging cogging on the homogenized cast ingot by adopting a high-speed forging machine to obtain a rolled blank; and the rolled blank is fed into a continuous rolling unit to be rolled, and the GH4169 alloy small-specification bar is obtained. According to the method, the cast ingot is homogenized at high temperature for a long time, diffusion and migration of elements can be promoted, and the uniformity of internal components of the cast ingot is improved; the cast ingot is subjected to large-deformation forging cogging by a high-speed forging machine, and carbides and crystal grains can be obviously uniform and refined; and a continuous rolling unit is adopted for rolling into a material, so that uniform deformation can be further ensured, and uniform and fine grains and carbides are obtained.

The present invention provides an ultra-pure urea-grade austenitic stainless steel plate without ferrite, wherein the chemical composition and weight percentage thereof are C: 0.01-0.03%, Si≤1.00%, Mn: 1.00-2.00%, P≤0.020%, S≤0.010%, Ni: 9.00-11.00%, Cr: 25.00-30.00%, Mo: 3.00-4.00%, and the remainder is Fe and unavoidable impurities, and the preparation method thereof comprises smelting-continuous casting-forging-homogenization-compounding-rolling-heat treatment. The stainless steel plate provided by the present invention takes into account good corrosion resistance and high-purity single structure without ferrite, and has excellent room temperature and high temperature performance and low Ni content.

The invention relates to a forging method for controlling grain size uniformity of 0Cr16Ni15Mo2V stainless steel, which adopts a free forging and precision forging combined method to manufacture and produce fine-grain and homogenized 0Cr16Ni15Mo2V stainless steel, adopts free forging in a three-upsetting and six-drawing mode, adopts low-temperature multi-pass precision forging to control total deformation, and adopts a quick water cooling method after forging. The grain size of the forge piece is controlled to be more than level 5 and the strength range of the cross section is controlled to be within level 2 through the relation among different upsetting and drawing temperatures and deformation of free forging, deformation of different passes of precision forging, the pressing frequency of a hammer head and the feeding speed.

The invention relates to the technical field of target materials, and provides an aluminum target material casting method which comprises the following steps: melting an aluminum raw material to form molten aluminum, and sequentially carrying out refining treatment, first filtering treatment and casting treatment on the molten aluminum to prepare the aluminum target material, wherein the molten aluminum entering the casting treatment is subjected to wire feeding treatment, the casting treatment comprises a pre-steady-state stage and a steady-state stage, casting treatment parameters in the pre-steady-state stage are changed, and casting treatment parameters in the steady-state stage are not changed; when the casting treatment is in a pre-steady state stage, the wire feeding treatment comprises the steps of adding a first aluminum wire into the molten aluminum, and carrying out first stirring treatment on the molten aluminum in the casting treatment; when the casting treatment is in a steady state stage, the wire feeding treatment comprises the steps of adding a second aluminum wire into the molten aluminum, and carrying out second stirring treatment on the molten aluminum in the casting treatment; the diameter of the first aluminum wire is smaller than that of the second aluminum wire, and the strength of the first stirring treatment is smaller than that of the second stirring treatment. According to the method, grain refinement of the high-purity aluminum target material through the casting method is achieved.

This invention relates to the field of aluminum alloy extrusion technology, and particularly to a split extrusion process for thin-walled aluminum alloy 3003. The invention involves sequentially subjecting an ingot to integrated homogenization annealing and preheating, die heating, extrusion cylinder heating, and split extrusion treatment, resulting in a split extruded aluminum alloy 3003 thin-walled part. The chemical composition of the ingot (mass percentage) is as follows: Si: 0.05–0.1%, Fe: 0.3–0.4%, Cu: 0.05–0.1%, Mn: 1.05–1.1%, Mg: 0.008–0.01%, Zr: 0.004–0.005%, Cr: 0.004–0.005%, Ni: 0.004–0.005%, Zn: 0.008–0.01%, Ti: 0.02–0.025%, Ce: 0.04–0.05%, with individual impurities ≤0.025%, total impurities ≤0.15%, and the remainder being Al. This method can shorten the heating time of split extrusion of thin-walled aluminum alloy 3003 parts, improve production efficiency, and obtain higher dimensional accuracy and uniform grain size by controlling billet temperature, deformation temperature and deformation speed.

The invention relates to the technical field of electroplating, in particular to a leveling agent, a preparation method of the leveling agent, copper electroplating liquid and a copper electroplating method. The leveling agent includes a functional component that is a reaction product comprising one or more cyclic secondary amine compounds or salts thereof, one or more dihaloalkyl ethers, one or more diepoxy compounds. When the leveling agent provided by the invention is used for copper electroplating liquid and copper electroplating treatment, electroplating processing of different space geometric structures on the surface of a substrate can be met, the leveling agent has good deep plating capacity and blind hole filling effect, and a formed copper plating layer is uniform in grain size, few in crystal defect and excellent in uniform corrosion capacity; the problem that hole-shaped corrosion pits appear after acid etching is effectively avoided, and the reliability of the copper interconnection layer prepared through the lamination method is guaranteed.

The invention discloses a rare earth co-doped multi-titanium barium ceramic material for a microwave medium as well as a preparation method and an application of the rare earth co-doped multi-titanium barium ceramic material. The composition expression of the rare earth co-doped multi-titanium barium ceramic material for the microwave medium is (1-y-z) [(1-x) BaO-xTiO2]-yLn2O3-zBi2O3, Ln is selected from at least two of La, Sm, Gd and Y, and x, y and z are molar percentages and meet the following conditions: 74% < = x < = 81%, 1% < = y < = 9.9%, and 0.1% < = z < = 1%. The microwave dielectric ceramic material can maintain the following microwave properties under the sintering condition of 1250-1350 DEG C: epsilon r = 50 + / -1, Qf is greater than or equal to 15,000 GHz, the temperature coefficient of resonance frequency tau f is adjustable and meets the requirement within + / -15 ppm / DEG C, the technical requirements of base station isolators can be met, and the microwave dielectric ceramic material has important industrial application value.

This invention discloses a high-performance wrought magnesium-lithium alloy, comprising the following components by mass percentage: Li 4.8%~5.3%, Zn 5.7%~6.2%, Y 1.8%~2.3%, with the balance being Mg. The alloy is prepared as follows: 1. Raw materials of each component are taken according to the mass percentage of the target magnesium-lithium alloy, and smelted and cast to obtain a magnesium-lithium alloy ingot; 2. The magnesium-lithium alloy ingot is subjected to homogenization heat treatment; 3. After low-temperature preheating, it is subjected to low-temperature extrusion and cooled to room temperature. The magnesium-lithium alloy of this invention, by adding Zn and Y elements, introduces a network W phase, MgZn phase, and MgY phase as reinforcing phases to strengthen the alloy. Combined with the homogenization heat treatment followed by low-temperature extrusion deformation in the preparation process, cold forming capability is increased, and the second phase is effectively broken up, synergistically improving the strength and plastic mechanical properties of the magnesium-lithium alloy, making it suitable for aerospace and other fields.

The invention relates to the technical field of BiOCl photocatalytic material preparation and water pollution degradation, in particular to a BiOCl photocatalytic material and a preparation method and application thereof.The preparation method comprises the following steps that soluble Bi salt is dissolved in a solvent and subjected to ultrasonic treatment, a first solution is obtained, soluble chloride salt is dissolved in the solvent and stirred, and a second solution is obtained; adding the second solution into the first solution, stirring and mixing at room temperature, carrying out an ultrasonic microwave chemical reaction to obtain a suspension, and carrying out post-treatment on the suspension to obtain the BiOCl photocatalytic material. The photocatalytic material is used for effectively removing mercury ions in a water body.

The invention provides a production process of a 20CrMnTi ultra-fine grain forge piece, which sequentially comprises the working procedures of medium-frequency heating, forging forming, air cooling and annealing, the forging forming working procedure adopts warm forging forming, a heated bar is extruded and formed in a 800T press, the deformation rate during extrusion is 0.66 * s <-1 >-0.78 * s <-1 >, the deformation amount of the cross section after forming is greater than 40%, and the deformation amount of the cross section after forming is greater than 40%. A continuous push rod type annealing furnace is adopted in the annealing process, a room-temperature product is conveyed into the continuous push rod type annealing furnace, the annealing temperature is set to be 800 DEG C, heat preservation is conducted for 2 hours, and after slow cooling is conducted to 640 DEG C, the product is discharged out of the furnace and air-cooled to the room temperature. According to the method, grains are refined through dynamic recrystallization in the forging process, the structure form is optimized through a specific annealing process, and the grain size is uniform while the thin-sheet pearlite is obtained.

The present invention belongs to the technical field of electronic components, and specifically provides a PTC ceramic sintering sagger and a method for using the same. The graphite strips playing a supporting role between the upper cover plate and the bowl body of the sintering sagger are used to ensure the air permeability of the sintering sagger in the debinding stage, so that the organic matter added in the granulation process can be fully discharged after thermal decomposition. During use, the temperature is increased in stages to ensure the discharge of organic additives in the debinding stage, and then the temperature is increased to gradually oxidize and consume the graphite strips. The upper cover plate falls and forms a sealing structure with the bowl body. After entering the sintering high temperature zone, the sealed sintering sagger ensures the consistency of the internal temperature. After the sintered block experiences a higher sintering temperature, it is kept warm at a lower temperature, which suppresses the rapid movement of the grain boundary, and can obtain a sintered block with fine and uniform grains, and finally obtain a PTC ceramic with a dense structure, uniform grain size, uniform resistance distribution, and low edge color abnormality rate.

The invention discloses a low-performance-deviation aluminum foil blank and a preparation method thereof, and belongs to the technical field of aluminum alloy material processing. The aluminum foil disclosed by the invention is prepared from the following components in percentage by mass: 0.6%-0.75% of Fe, 0.45%-0.55% of Si, 0.04%-0.06% of Cu, 0.04%-0.06% of Zn, 0.01%-0.03% of Mn, 0.01%-0.03% of Cr, 0.01%-0.02% of Mg, 0.01%-0.03% of Ti and the balance of Al. The manufacturing method comprises the steps of burdening, smelting, cast rolling, primary cold rolling, homogenizing annealing, rough rolling and finish rolling. The content of Fe and Si in the aluminum foil is optimized, and the aluminum foil which is high in surface quality, good in plate shape, small in performance deviation in the transverse direction, the longitudinal direction and the 45-degree direction and excellent in comprehensive mechanical performance is obtained in combination with the sectional type homogenizing annealing and the hot rolling and cold rolling preparation technology.

The invention provides a magnesium-aluminum composite oxide carrier and a preparation method thereof as well as a methane dry reforming catalyst and a preparation method and application thereof. The preparation method of the magnesium-aluminum composite oxide carrier comprises the following steps: dissolving magnesium salt in deionized water to form a magnesium salt solution; dissolving an aluminum source in an acid solution to form aluminum sol; mixing the magnesium salt solution and the aluminum sol, adjusting the pH value to 3-4 by using an acid solution, and continuously stirring to obtain a turbid liquid; in the turbid liquid, the molar ratio of aluminum to magnesium is (1: 1)-(3: 1); and drying and roasting the turbid liquid to obtain the magnesium-aluminum composite oxide carrier. The preparation method of the magnesium-aluminum composite oxide carrier is simple in process, environment-friendly and convenient for large-scale production, meanwhile, the obtained carrier has a relatively high specific surface area, and the dispersion degree of active metal nickel can be improved by preparing the supported nickel-based methane dry reforming catalyst by taking the magnesium-aluminum composite oxide as the carrier, so that the grain size of the active metal nickel is reduced, and the catalytic activity of the catalyst is improved. The high-temperature sintering resistance of the catalyst is improved; the activity stability is enhanced.

The invention relates to a streamlined vibration chilling nucleation device and an operation method, and the device comprises a crystallizer which is arranged below a submersed nozzle at the bottom of an external tundish; the liquid metal cooling pond is arranged on the side face of the crystallizer. The cooling fan is arranged on the side face of the liquid metal cooling pool so that the liquid metal cooling pool can be cooled. The chilling nucleation device is arranged in the crystallizer and communicated with the liquid metal cooling pool, and the chilling nucleation device is in a streamline shape; the cooling pipeline is arranged between the liquid metal cooling pool and the chilling nucleator; the variable-frequency pump is arranged on the cooling pipeline; the vibration generator is arranged on the cooling pipeline in a sleeving manner and is arranged between the variable frequency pump and the chilling nucleation device; the flow blocking assembly is arranged in the chilling nucleator. The chilling nucleator is arranged to be streamline, the thickness of a solidification structure on the surface of the chilling nucleator is reduced, stripping of crystal nucleuses and melting of dendritic crystals are promoted, the number of equiaxed crystal nucleation particles is increased, and the internal quality of the large continuous casting billet is improved.

The application discloses a preparation method of a gadolinium-containing nickel-based alloy component. The gadolinium-containing nickel-based alloy pre-alloy powder is prepared into the gadolinium-containing nickel-based alloy component by using a hot isostatic pressing process with a temperature of 1080-1160 DEG C and a pressure of 120-200 MPPa, so that a Ni5Gd rare earth phase is refined to micron / submicron dispersion distribution, a matrix is an equiaxed crystal organization of complete recrystallization, original particle boundaries are completely eliminated, and grain sizes are uniformly distributed at about 5.3 mu m, thereby obtaining a near-net-shape product of the gadolinium-containing nickel-based alloy component. The application further discloses a gadolinium-containing nickel-based alloy component. Compared with the prior art, the application realizes the synergistic optimization of a rare earth phase and a matrix organization in the same process: the Ni5Gd rare earth phase is inhibited from coarsening, meanwhile, the matrix is completely recrystallized and the original particle boundaries are eliminated, and a near-net-shape gadolinium-containing nickel-based high-temperature alloy component with highly uniform organization and excellent strength-plasticity matching is obtained at one time.

The present invention relates to a precursor for improving the properties of refractory materials for cement rotary kilns and its application. The precursor raw material contains the following substances in the following amounts: 1 part of magnesium nitrate hexahydrate, 1 part of lanthanum nitrate hexahydrate, 11 parts of aluminum nitrate nonahydrate, and 10-17 parts of citric acid monohydrate. The precursor prepared by the present invention has obvious flaky structural characteristics, can effectively play a role of overseas association in the material system, and improve the strength, thermal shock stability and resistance to alkaline medium erosion of the refractory material. The present invention also provides a refractory material containing the above-mentioned precursor. The periclase-magnesium aluminum spinel refractory material for cement rotary kiln prepared by the present invention is tested: the compressive strength is 85-110MPa; the residual flexural strength retention rate after 1100°C thermal shock 3 times air cooling is not less than 75%; no obvious erosion and penetration are found in the alkaline medium erosion resistance experiment.

The application provides a display panel and a display device. The display panel comprises a first transistor, a second transistor and a first interlayer insulating layer between the first transistor and the second transistor. The first transistor comprises a first active layer, and the material of the first active layer is amorphous oxide semiconductor. The second transistor comprises a second active layer, and the material of the second active layer is polycrystalline oxide semiconductor. The display panel and the display device provided by the application have a mixed driving circuit of polycrystalline oxide semiconductor and amorphous oxide semiconductor, the amorphous oxide semiconductor transistor with low leakage current and high uniformity is used as a switching transistor, and the high mobility and low off-leakage current are used as a driving transistor, so that the leakage current is reduced, the first transistor and the second transistor are arranged in different layers, and the first active layer and the second active layer are separated by the first interlayer insulating layer, so that the probability of the two being simultaneously invaded by water and oxygen is reduced, and the stability of the driving circuit is improved.