79results about How to "Promote diffuse distribution" patented technology

The invention discloses a high magnetic induction oriented silicon steel and a production method thereof. The silicon steel comprises the following chemical composition: 0.055wt percent to 0.080wt percent of C, 2.9wt percent to 3.5wt percent of Si, 0.01wt percent to 0.02wt percent of Mn, 0.005wt percent to 0.010wt percent of Als, 0.0050wt percent to 0.0090wt percent of N, 0.25wt percent to 0.55wt percent of Sn, 0.010wt percent to 0.030wt percent of P, 0.10wt percent to 0.20wt percent of Cu, and the rest are Fe and unavoidable impurities. The production method comprises the following steps of: smelting, continuous casting, hot rolling, reeling, cold rolling, decarburizing annealing and high-temperature annealing. The production method effectively overcomes the shortcoming of poor producibility of the prior art and improves the production efficiency as well as the magnetism of the silicon steel.

The invention discloses a method for preparing a compound electrical contact material. The technical process comprises the following steps of: (1) preparing a catalyst precursor, preparing a Ni-based catalyst from a mixed aqueous solution of hexahydrated nickel nitrate and hexahydrated yttrium nitrate, and depositing on a sample copper sheet which is subjected to plasma treatment and washed to obtain a catalyst precursor, wherein the mass ratio of nickel to yttrium is 1-10; (2) preparing a CNTs (Carbon Nanotube) array, putting the catalyst precursor into a quartz boat, undergoing a decomposition reaction under the protection of argon gas, and undergoing a catalytic pyrolysis reaction to obtain a sample copper sheet on which a CNTs array grows; and (3) preparing a CNTs-Ag-Cu compound electrical contact material, adding a silver nitrate aqueous solution into the sample copper sheet on which the CNTs array grows, soaking the silver nitrate aqueous solution into the CNTs array of the sampler copper sheet under the low ultrasonic action, evaporating and decomposing repeatedly for 3-20 times for 0.2-3 hours every time till the CNTs array is fully filled.

The invention relates to the field of batteries, and aims at providing a positive electrode sulfur-carrying material of a lithium-sulfur battery and a preparation method of the lithium-sulfur battery. The preparation method comprises the following steps: adding thiourea and water-soluble monosaccharide or polysaccharide into ionized water to prepare a solution, and performing polymerization to prepare thiourea-glucoresin; further adding hydrophilic nano calcium carbonate and nano lithium cobalt oxide, and uniformly stirring to prepare a turbid liquid; and performing spray-drying, heating at 200 DEG C and 700 DEG C with flow N2, sequentially washing a carbonization product with hydrochloric acid and deionized water, and drying at constant temperature, thereby obtaining lithium cobalt oxide modified sulfur-containing macropore carbon. According to preparation method, sulfur in the sulfur-containing macropore carbon has special affinity with Co, the dispersion distribution of the nano lithium cobalt oxide can be intensified, the use efficiency of the lithium cobalt oxide can be improved, the conductivity of the macropore carbon is also improved due to doping the sulfur, a certain sulfion accumulation function can be also achieved, and the speed capacity and the property stability of the lithium-sulfur battery are greatly improved.

The invention discloses a method for reactive spraying preparation of a ceramic solid solution-based ceramic-metal eutectic nanometer composite coating. The method comprises the following steps of 1, raw material powder preparation: selecting raw materials for reactive spraying preparation of the ceramic solid solution-based ceramic-metal eutectic nanometer composite coating and a ratio of the raw materials, 2, composite fed material preparation, and 3, eutectic nanometer composite coating preparation: preparing the [Cr+(Crx, Al1-x)2O3] eutectic nanometer composite coating by an atmospheric plasma spraying method. The eutectic nanometer composite ceramic coating is characterized in that a matrix is a component-controllable ceramic solid solution, and a metal phase in a form of nanometer particles (rods) is dispersively distributed on the ceramic matrix so that the ceramic solid solution-based ceramic-metal eutectic nanometer composite coating is obtained. The prepared [Cr+(Crx, Al1-x)2O3] eutectic nanometer composite coating has high toughness, good wear resistance, high temperature oxidation resistance and corrosion resistance.

The invention provides a large scale hypereutectic high-silicon aluminum alloy blank, whose cross-sectional area is between 600-150000mm2, the Si content in the alloy is 13.5-30wt%, it has homogeneous and fine microstructure structure, the Si particles are in dispersed distribution with an average size of less than 5um. The preparing process consists of making ingot blank through semi-continuous casting method, then carrying out subsequent heat treatment for Si particles discretization, finally regulating Si particle size through thermal treatment.

The invention discloses a flexible electrode film and a preparation method and an application thereof. The film comprises a carbon fluoride supported sulfur composite material, carbon nanotubes and abinder. The mass ratio of the carbon fluoride supported sulfur composite material to the carbon nanotubes to the binder is (5-12): (0.8-1.2): (0.8-1.2). After hot pressing of the film, a self-supporting flexible cathode is obtained. A preparation method combining atmospheric-pressure low-temperature drying and high-temperature short-time hot pressing is adopted, which can cause secondary melting expansion of sulfur, reduce the resistance of the electrode and achieve the effects of film formation, flexibility improvement and reduction in sulfur loss of active components. The electrode has a compact structure, excellent flexibility and good conductivity.

The invention discloses a tough high-chrome abrasion-resistant cast ball. The tough high-chrome abrasion-resistant cast ball comprises, by weight, 2%-2.2% of C, 10%-12% of Cr, 0.4%-0.6% of Si, 0.5%-0.7% of Mn, 0.5%-2% of Nd, 1%-2.5% of Si, 0.5%-2% of Ti and the balance Fe and inevitable impurities. The invention further discloses a preparation method of the tough high-chrome abrasion-resistant cast ball. The preparation method of the tough high-chrome abrasion-resistant cast ball comprises the steps of smelting, casting and heat treatment. According to the tough high-chrome abrasion-resistant cast ball and the preparation method thereof, a micro amount of Nd, a micro amount of Si and a micro amount of Ti are added based on a conventional high-chrome cast ball, so that on the basis that the high hardness and high abrasion resistance of the high-chrome cast ball are guaranteed, the lower quenching tendency and the lower cracking tendency are achieved in the use process, the preparation technique is simple, and the cost is low.

The invention discloses a method for preparing a whisker toughened composite coating through a liquid-phase method spraying process, and belongs to the field of nano thermal protection coating preparation. Whiskers and ceramic-based nano powder are mixed and then added into a solvent, then a dispersing agent and a softening agent are added to obtain a suspension, the suspension is sprayed out through a centrifugal atomizer after being subjected to ball milling, the atomized suspension is melted under the action of a plasma heat source of plasma spraying and impacts the surface of a base body, and the whisker toughened composite ceramic coating is obtained. The method is short in preparation period, simple in process, easy to control, capable of achieving large-scale production and wide in application market.

An Fe-X-C grain refiner in the technical field of metal materials and a preparation method thereof. Fe-X-C grain refiner, its composition and mass percentage are: Fe 35-99.4%, C 0.1-15%, X 0.5-50%; wherein, X is one or more of Ti, V and Nb kind. The preparation method of Fe-X-C grain refiner comprises the following steps: step 1, take Fe-C alloy, mix with metal X; Or, take pure iron and graphite, mix with metal X afterwards; The melt is melted in the furnace; in the mixture, Fe is 35-99.4%, C is 0.1-15%, and the balance is X; step 2, when the temperature of the melt is 1550-1650°C, feed argon into the melt , the time is 10s ~ 3h; Step 3, stop feeding argon, cut off the power, and get the Fe-X-C grain refiner. The grain refiner of the invention is easy to prepare; adding the grain refiner of the invention to the steel melt can refine the grains of the steel and increase the ratio of the equiaxed grain area of ​​the as-cast structure of the billet to more than 60%.

The invention provides a high-specific-strength and high-specific-stiffness aluminum-lithium alloy thick-wall annular piece and a preparation method thereof, and belongs to the technical field of aluminum-lithium alloy new materials and manufacturing. The aluminum-lithium alloy thick-wall annular piece comprises the following chemical components: 0.8-2.8 wt% of Cu, 2.4-3.8 wt% of Li, 0.8-1.8 wt% of Mg, 0.5-1.5 wt% of Zn, 0.1-0.5 wt% of Er, 0.05-0.2 wt% of Zr, less than or equal to 0.08 wt% of Fe, less than or equal to 0.05 wt% of Si, and the balance of Al and inevitable impurities, wherein the total amount of the alloy elements is less than or equal to 8.5 wt%. The preparation method comprises the steps of alloy proportioning, boron nitride brushing, smelting, refining, centrifugal casting and heat treatment. According to the invention, the forming process of the aluminum alloy annular piece can be simplified, the internal structure is compact, and the specific strength and specific stiffness of the aluminum alloy annular part are remarkably improved.

The invention discloses an RH refining powder rotary-jetting and dephosphorizing method. The RH refining powder rotary-jetting and dephosphorizing method comprises the steps that (1) a powder rotary-jetting gun is inserted to the position 400-650 mm below the surface of molten steel, and starts rotary-jetting of powder; (2) the rotation speed of the powder rotary-jetting gun is 130-150 r / min, thecarrier gas flow of the powder rotary-jetting gun is 30-90 Nm<3> / h, the carrier gas pressure is 0.5-0.8 MPa, the powder jetting rate is 0.1-4.5 kg / s, and Ar is adopted as carrier gas; and (3) the spray-blowing time of the powder rotary-jetting gun is 10-20 min, the powder rotary-jetting gun is lifted out of the surface of the molten steel after spray-blowing is completed, the rotation speed is decreased to 5-10 r / min or below, and after the powder rotary-jetting gun is lifted to the position 300-500 mm above the surface of the molten steel, the powder rotary-jetting gun rotates at a higher speed of 50-80 r / min for 10-30 s.

A process for preparing the Al-base composition under strong magnetic field includes such steps as heating Al to 850 deg.C, holding the temp for 30 min, adding reinforcing Al2O3 particles (or short fibres), stirring, pouring in mould, solidifying for 20 min strong magnetic field system and cooling in air. Its equipment is composed of metallic ladle, heating system, thermoelectric couple, reinforcing material delivering pipe, stirring coil, casting mould, supporter, slide sprue, vacuum chamber or protecting gas chamber, and the strong magnetic field control system consisting of strong magnetic field genrator, cooling water pipe, alarm and temp control unit and insulating layer.

The invention discloses a Fe-X-C grain refiner and a preparation method thereof, belonging to the technical field of metal materials. The Fe-X-C grain refiner comprises the following components by weight percent: 35-99.4 percent of Fe, 0.1-15 percent of C and 0.5-50 percent of X, wherein X is one or more selected from Ti, V and Nb. The preparation method of the Fe-X-C grain refiner comprises the following steps : firstly, taking an alloy of Fe and C to mix with a metal X; or taking a pure iron and graphite to mix with the metal X; and smelting a mixture in vacuum in a frequency induction furnace to obtain a fusant, wherein the mixture contains 35-99.4 percent of Fe, 0.1-15 percent of C and X of the balance; secondly, leading argon into the fusant for 10s-3h when the fusant is at 1550-1650DEG C; and thirdly, stopping leading the argon and switching off the electricity to obtain the Fe-X-C grain refiner. The grain refiner has simple preparation; and the grain refiner can be added into a steel fusant to refine the grains of the steel so that the proportion of a billet steel casting tissue equiaxed grain zone is improved by 60 percent.

The invention provides a cooling mold and a method for cooling a steel ingot. The cooling mold comprises a pouring chassis and condensation walls, and each condensation wall comprises at least two cooling layers which are vertically arranged in sequence. The cooling mold further comprises at least two pairs of electromagnetic induction components which are arranged on the outer side of the condensation walls, each pair of the electromagnetic induction components are symmetrically arranged on the two sides of a casting cavity, and each cooling layer is provided with at least one pair of electromagnetic induction components; each electromagnetic induction component comprises at least two pairs of coils which can be connected to the corresponding condensation wall in a sliding manner, and the two coils in each pair of the coils are oppositely arranged in parallel; among all the electromagnetic induction components, at least one pair of the coils are vertically arranged, at least one pair of the coils are horizontally arranged, and all the horizontally arranged coils are located between center lines of all the vertically arranged coils; and the two ends of all the coils are sequentially opposite to each other or sequentially connected end to end to form a semi-closed or closed rectangle in an enclosing manner. According to the cooling mold, molten steel can be stirred in the horizontal direction and in the vertical direction separately, and the quality of steel ingots is improved.

The invention discloses a method for preparing a compound electrical contact material. The technical process comprises the following steps of: (1) preparing a catalyst precursor, preparing a Ni-based catalyst from a mixed aqueous solution of hexahydrated nickel nitrate and hexahydrated yttrium nitrate, and depositing on a sample copper sheet which is subjected to plasma treatment and washed to obtain a catalyst precursor, wherein the mass ratio of nickel to yttrium is 1-10; (2) preparing a CNTs (Carbon Nanotube) array, putting the catalyst precursor into a quartz boat, undergoing a decomposition reaction under the protection of argon gas, and undergoing a catalytic pyrolysis reaction to obtain a sample copper sheet on which a CNTs array grows; and (3) preparing a CNTs-Ag-Cu compound electrical contact material, adding a silver nitrate aqueous solution into the sample copper sheet on which the CNTs array grows, soaking the silver nitrate aqueous solution into the CNTs array of the sampler copper sheet under the low ultrasonic action, evaporating and decomposing repeatedly for 3-20 times for 0.2-3 hours every time till the CNTs array is fully filled.

The invention discloses a method for preparing an in-situ particulate reinforced magnesium base composite material, which comprises three steps of preparing a precast block, preparing reinforced particulates and preparing a composite material. In the method, a Al-Ti-CaC2-C reinforced system is adopted; a self-propagation high-temperature synthesis method is used for producing TiC reinforced particulates and a Al-Ca compound in-situ in the precast block in vacuum or under the protection of inert gases; the reacted precast block is put into a magnesium alloy melt to melt and spread; and sufficient stirring is finished and pouring is carried out to prepare into the particulate reinforced magnesium base composite. The method has the advantages of relatively simple technology and low cost; in the particulate reinforced magnesium base composite, reinforcing phase particulates are fine, are distributed evenly, can be preferably combined with a matrix interface; and the prepared particulate reinforced magnesium base composite material has the advantages of good mechanical property, wear-resisting property and the like.