115 results about "Copper mold" patented technology

Lithium-aluminum-silicon glass ceramic and a preparation method therefor. The addition of a V2O5 and Ta2O5 composite nucleating agent reduces the crystallization temperature of glass and improves the stability of the glass; a doping agent, such as CeO2, significantly accelerates the growth speed of crystals, thereby nucleating and crystallizing the glass at relatively low temperatures and improving the transmittance of the glass; a co-solvent, such as B2O3, reduces the high-temperature viscosity of the glass, thereby reducing the activation free energy during the glass crystallization process and facilitating the crystallization and processing molding; a 3D hot bending process comprises the stages of preheating, pressurizing, annealing and cooling, a copper mold transfers heat to the glass by means of heat conduction, such that the glass is evenly heated during the heating process, and natural cooling can prevent the problem of glass being broken or having an inaccurate dimensional accuracy caused by excessive fast cooling; and the graft modification on the surface of the glass significantly improves the hydrophobic property of the glass, such that the comprehensive performance of the glass is good.

The invention belongs to the technical field of wrought aluminum alloy material processing, and relates to a high-strength high-conductivity 7050 aluminum alloy and a short-process preparation process thereof.The process comprises the steps that pure metal aluminum, pure metal zinc, pure metal magnesium, pure metal copper and pure aluminum-zirconium intermediate alloy serve as raw materials, 6.1-6.3 wt.% of Zn, 2.3-2.5 wt.% of Mg, 2.4-2.6 wt.% of Cu and 0.12-0.14 wt.% of Zr are matched, smelting, melt refining and refining treatment are carried out, and then the high-strength high-conductivity 7050 aluminum alloy is obtained; sub-rapid solidification of a melt is realized by adopting water-cooling copper mold casting, as-cast grains are remarkably refined, and formation of a coarse second phase is inhibited; traditional multi-stage annealing is replaced with single-stage homogenizing annealing, so that the residual phase area percentage is smaller than or equal to 1.0%, and the maximum residual phase size lt is achieved; 30 [mu] m; and by combining multi-pass hot rolling and solid solution-aging cooperative regulation and control, the problem of intensity-conductivity inversion caused by second phase distribution and grain boundary segregation is solved. Compared with a traditional process, the homogenization time is shortened by 50% or above, the total technological process is reduced by 30%-40%, and finally the high-performance 7050 aluminum alloy with the tensile strength larger than or equal to 650 MPa and the electric conductivity larger than or equal to 40% IACS is obtained.

The application provides a high-strength and high-damping titanium-based eutectic alloy, and belongs to the field of new material research and preparation. 70‑x‑y Nb x Zr y Fe 30 ) 100‑a‑b Sn a O b Wherein, 0.1<=x<=5, 0.1<=y<=5, 0.1<=a<=5, 0.1<=b<=1. Commercial industrial pure Ti, Fe, Nb, Zr, Sn and TiO2 are used as raw materials to prepare the target alloy, vacuum arc melting technology is used to melt and prepare the alloy ingot, and then copper mold casting technology is used to obtain the required alloy plate. The alloy of the application is (near) eutectic composition, the alloy melt has good fluidity and excellent casting performance; the eutectic structure formed by the alloy can have Snoek relaxation coupling effect, so that the material has better damping performance (Q ‑1 >0.03), the room temperature compression yield strength of the material is more than 2GPa, and in addition, the addition of a small amount of Nb, Zr and Sn elements can refine the alloy structure, and the mechanical properties and damping performance of the alloy are obviously improved.

The invention relates to a high-temperature mold three-dimensional defect online detection device and method for a disc casting machine, and belongs to the technical field of casting defect detection.The device comprises an upper computer module, a radio frequency identification module, a visual detection module and a visual software system; the radio frequency identification module is used for detecting whether the copper mold enters a to-be-detected station or not; the upper computer module is electrically connected with the radio frequency identification module, and the upper computer module is used for receiving and sending a control instruction; the visual detection module is electrically connected with the upper computer module and is used for shooting a machine visual image of a copper mold at a to-be-detected station; the visual software system is electrically connected with the upper computer module and the visual detection module, and the visual software system displays a planar graph according to a control instruction sent by the upper computer module and a machine visual image shot by the visual detection module and generates a depth map to analyze defect information. According to the method, the influence of product qualification rate fluctuation caused by personnel experience levels can be reduced, and the product qualification rate is improved.

The invention discloses a cast iron white sample preparation method for direct-reading spectrometry detection, a mold and a processing device thereof, and relates to the technical field of metal material analysis and detection, the cast iron white sample preparation method comprises the following steps: S1, under the protection of high-purity inert gas, rapidly melting a cast iron sample by using a high-frequency induction heating device; and S2, the completely-molten metal liquid is rapidly poured into a mold internally provided with a forced water cooling system. According to the preparation method of the cast iron white sample for direct-reading spectrometry detection and the mold, high-frequency rapid melting and ultra-rapid cooling of the water-cooling copper mold are combined, graphite precipitation is fundamentally inhibited, even for high-carbon-equivalent cast iron, it can be guaranteed that 100% of a full white structure is obtained, the problem that carbon and silicon elements are not detected accurately in spectral analysis is thoroughly solved, and the production efficiency is improved. The prepared sample is uniform and compact in structure, free of defects such as shrinkage porosity and pores and high in component representativeness, and the reproducibility and accuracy of direct-reading spectrum analysis are greatly improved.

The invention relates to the technical field of precious metal alloy material manufacturing, in particular to a process for hardening treatment of gold through micro-nano metal powder, which comprises the steps of blank charging, smelting, vacuum ingot casting, surface cleaning, rolling stretching and age hardening, product surface treatment, product welding and the like. The method has the advantages that in the aspect of material selection, the micro-nano metal powder, such as titanium powder and cobalt powder, is diversified and is small in adding amount, various strengthening mechanisms can be provided, and the economical efficiency is guaranteed. The smelting process is accurate, good vacuum and temperature control is achieved, and stirring is uniform after micro-nano metal powder is added. And rapidly solidifying the cast ingot by using a water-cooling copper mold, treating the surface by using aqua regia and the like, and drying. Midway annealing can be executed through rolling and stretching, and the process is flexible. Product manufacturing processes are diversified, and surface treatment includes polishing, electroplating, coloring and the like. Advanced modes such as laser are adopted for welding to avoid hardness reduction. According to the process, the gold hardening treatment effect and quality are improved from multiple aspects, different requirements are met, and wide application prospects are achieved.

The utility model discloses an insert processing device of a cedar fastener injection molding mold, which comprises a tool clamp and an insert, a pair of mounting grooves is symmetrically arranged at the top of the tool clamp, an included angle alpha is arranged between the mounting grooves and an X-axis plane, an included angle beta is arranged between the mounting grooves and a Y-axis plane, and the insert is arranged in the mounting grooves. According to the utility model, through the design of the tool clamp, the machining position of the insert is vertically arranged upwards, and the copper plug is moved up and down through the driving mechanism of the spark machine, so that the forming groove of the insert can be machined and formed; the mold insert can be sparking by adopting a common mirror spark machine, the machining requirement of the copper mold is reduced, the copper mold can be manufactured by only needing a common engraving and milling machine, the cost is low, the machining period is short, and the interchangeability is high.

The invention discloses a high-strength, high-plasticity and low-coercive-force soft magnetic high-entropy alloy and a preparation method thereof. The component expression of the soft magnetic high-entropy alloy is FeaCobNicVdMe according to the atomic ratio, M is one or more than two of solid solution strengthening elements Mn, B, Si, Cr, Mo and W, a is larger than or equal to 41 and smaller than or equal to 62, b is larger than or equal to 25 and smaller than or equal to 30, c is larger than or equal to 13 and smaller than or equal to 21, d is larger than or equal to 0 and smaller than or equal to 3, e is larger than or equal to 0 and smaller than or equal to 5, and a + b + c + d + e = 100. The production process is simple, the mother alloy is firstly prepared into a cast plate through induction / electric arc melting and copper mold casting, and the plate-shaped soft magnetic high-entropy alloy is prepared through high-temperature long-time vacuum heat treatment, multi-pass cold rolling, high-temperature short-time recrystallization heat treatment and air cooling.

Provided is a mold copper plate with which it is possible to form a solidified shell of a slab in an appropriate state and with which it is possible to prolong the life of a coating layer applied to the mold copper plate. A mold copper plate for a continuous casting mold has a base material layer comprising copper or a copper alloy, and a coating layer provided on the base material layer. The coating layer includes at least one of nickel, cobalt, a nickel-based alloy, a cobalt-based alloy, and a stainless steel alloy as a component element, and includes an alloy including at least one of a metal nitride, a metal carbide, and a metal oxide as another component element. According to the invention, the solidification shell of the slab can be formed in an appropriate state, and the service life of the coating applied to the mold copper plate can be prolonged.

The utility model relates to a constant-temperature mold casting device, which belongs to the technical field of non-ferrous metals and comprises a copper mold, a heat exchange medium channel is arranged in the copper mold, the input end of the heat exchange medium channel is communicated with a water inlet pipe, and the output end of the heat exchange medium channel is communicated with a water outlet pipe; the water inlet pipe is connected with an input pipeline through a liquid rotating joint, the input pipeline comprises a cooling water input pipe and a hot steam input pipe, and the hot steam input pipe is connected with the cooling water input pipe through a water vapor switching electromagnetic valve; the water outlet pipe is connected with a heat exchange return water output pipe through a liquid rotating connector. The temperature of the mold can be well controlled, and the service life of the mold is prolonged.

The invention relates to the technical field of thin-strip continuous casting, in particular to a method for measuring interface thermal resistance in the molten steel solidification process, which comprises the following steps: calculating temperature distribution in the molten steel cooling process by using a mathematical modeling method, and accurately calculating the change condition of the interface thermal resistance in the molten steel solidification process by combining experimental data of a molten drop solidification device. The method specifically comprises the following steps: controlling the dripping temperature of molten steel, obtaining temperature measurement data of two thermocouples according to a thermal simulation experiment, obtaining the height and room temperature of a steel drop, and obtaining a heat flow of a steel sample and a copper substrate interface and the surface temperature of a copper mold based on the temperature measurement data of the two thermocouples; establishing a one-dimensional heat transfer model, and calculating the overall temperature distribution of the molten steel by combining the density, specific heat capacity and other parameters of the steel sample; the interface thermal resistance of the molten steel in the copper mold surface heat transfer process is calculated by adopting the following formula based on the overall temperature distribution of the molten steel, so that the interface thermal resistance can serve as a thermal resistance parameter of a heat transfer interface to be applied to a numerical simulation calculation process, and production is guided.

The invention belongs to the field of porous metal materials, and particularly relates to a foamed aluminum sandwich panel based on a single-layer alloy panel and a preparation method of the foamed aluminum sandwich panel. The upper surface and the lower surface of an existing foamed aluminum sandwich panel are mostly made of the same alloy component, and the problems that the thickness of a skin layer is limited, and a lower panel is too thick exist. In order to solve the problem, the invention provides a preparation method which comprises the following steps: firstly, melting an aluminum alloy, adding a tackifier, a foaming agent and the like, and casting molten metal into a water-cooling copper mold to form a foamable prefabricated blank; secondly, the foamable prefabricated blank, a pure zinc plate and an alloy panel are clamped and then subjected to vacuum compounding, and a foamable prefabricated plate is obtained; and finally, the foamable prefabricated plate is subjected to heat preservation foaming, and the novel foamed aluminum sandwich plate structure with the compact aluminum alloy layer on the lower surface, the foamed aluminum core layer in the middle and the alloy panel on the upper surface is obtained. According to the method, secondary foaming and vacuum compounding are combined, different alloy panels can be compounded according to actual requirements, and the method is suitable for various application scenes.

The invention belongs to the technical field of metal plate strip heat treatment, and discloses a continuous quenching device and method for a metal strip with the thickness smaller than or equal to 2 mm. The cooling system utilizes a graphite plate and a water cooling copper mold to achieve efficient and high-uniformity heat exchange of a metal strip, the circulating water system controls the water temperature, the lifting rack provides pressing force to achieve tight attachment of the strip and the graphite plate, the strip traction positioning system provides traction force to balance friction force between the graphite plate and the strip, and a traction roller transmission motor is used for controlling the speed of the strip. The method comprises a pressing force control method, a circulating water control method and a traction force and traction speed control method, quenching deformation of the strip can be effectively restrained, and quenching according to the process speed and the cooling path is achieved. According to the invention, the industrial common problems of poor quenching plate shape, large residual stress, poor quenching temperature uniformity and the like of the ultra-thin metal strip are solved, and high-strength uniform, high-straightness and low-residual-stress quenching production of the ultra-thin metal strip is realized.

The utility model provides a copper mold core for solving mold exhaust, and aims to solve the problems of unsmooth mold exhaust, bubble accumulation, material adhesion, difficult demolding and the like. The copper mold core mainly comprises a mold core column body, a forming groove, an exhaust micropore, an exhaust groove, a fixing lug and a surface coating. The mold kernel column body is made of copper or copper alloy and has excellent thermal conductivity; the forming groove is formed in the top of the mold kernel column body, and the smoothness of the formed surface is ensured through high-precision machining and polishing; the exhaust micropores and the exhaust grooves are respectively formed in the interior of the forming groove and the edge of the mold kernel column body and are used for effectively exhausting gas in the forming process and avoiding bubble retention; and the fixing lugs are used for stably mounting the mold core on production equipment. Through the design, the exhaust effect of the mold is remarkably improved, the forming quality of contact lenses is improved, the demolding process is smooth, and the service life of the mold is prolonged. The method is suitable for the production field of contact lenses and other high-precision medical instruments, and has wide application prospects.

This invention discloses a method for improving the dimorphic eutectic in SuperDyma alloys. The mass percentages of the components in the alloy are: Al: 11%, Mg: 3%, Si: 0.2%, B: 0.06-0.09%, with the remainder being Zn. First, SuperDyma alloys are obtained by casting using different cooling methods. The alloy liquid cooled using a copper mold exhibits the most uniform solidification structure, with a significant improvement in dimorphic eutectic. By adding B element to the SuperDyma alloy through alloying, the solidification structure is refined, further improving the dimorphic eutectic phenomenon and consequently enhancing the alloy's corrosion resistance.

The application discloses a preparation method of nano-graphene lubricating oil and relates to the technical field of lubricating oil. The modified zirconium-titanium composite particles are used as a catalyst to synthesize base oil, so that the heat resistance effect is improved; then, under the assistance of microwaves, graphene is stripped to improve the dispersibility of the graphene in the lubricating oil, and a hydrogen bond network is formed on the surface of the modified zirconium-titanium particles, so that the fatigue wear is reduced, and the service life is prolonged; on the basis, electrochemical deposition is generated between the particles and the graphene in the friction process, so that the self-repairing effect is achieved. The modified zirconium-titanium composite particles are first injected into pre-cooled liquid nitrogen copper molds by precursor sol, are rapidly frozen, are dried by vacuum sublimation to remove ice crystals, and form snowflake-like hierarchical porous structures, so that the lubricating effect is improved; then, low-temperature annealing is performed to form Zr-O-Ti mixed oxide skeletons, so that the pore collapse is effectively inhibited, and the service life is prolonged; and then, through the surface hydroxyl groups and capillary action, ionic liquids are adsorbed to form a coating layer, so that the lubricating effect is enhanced.

This invention discloses an experimental apparatus and method for preparing the initial solidified shell of a square billet using permanent magnet stirring in a crystallizer. The apparatus includes a control system, a crucible, a heating furnace for heating the crucible, a permanent magnet stirring module for permanently stirring the molten steel in the crucible, a crystallizer, and a casting module matched with the crystallizer. The crystallizer is equipped with a copper mold. The control system is electrically connected to the heating furnace, the permanent magnet stirring module, and the casting module. The apparatus and method of this application can simulate the preparation of the initial solidified shell of a square billet under different permanent magnet stirring conditions in a crystallizer. It has the advantages of simple structure, easy maintenance, low cost, and diversified magnetic field modes, improving the controllability and quality of the cast billet. It can be used to study the effect of permanent magnet stirring in the crystallizer on the initial solidified shell of the square billet, to explore the optimal permanent magnet stirring conditions for different steel grades, and to provide guidance for the industrial application of permanent magnet stirring in crystallizers.

The application discloses a method for improving the magnetic entropy change of a prepared alloy through heat treatment, and comprises the following steps: (1) ultrasonic cleaning, ethanol washing and natural drying of nickel particles, manganese particles and gallium particles; (2) repeatedly melting the mixed raw material particles obtained by mixing the nickel particles, the manganese particles and the gallium particles to obtain an alloy ingot; (3) casting the alloy ingot into an alloy rod by using a copper mold suction casting method; (4) polishing, ultrasonic cleaning, ethanol washing and drying of the alloy rod; and (5) performing phased heat treatment on the treated alloy rod in a vacuum environment by using a mode of gradually reducing heat treatment temperature and gradually increasing heat treatment time, and cooling the alloy rod to room temperature in the furnace after the phased heat treatment is completed. The application can solve the technical problems that the magnetic entropy change of the existing nickel-manganese-gallium alloy cannot be effectively improved under high magnetic field intensity.

The preparation method of a high-strength and high-toughness lead-tin bronze rod of the present invention relates to the technical field of lead-tin bronze rod processing, and specifically relates to a preparation method of a high-strength and high-toughness lead-tin bronze rod, including the following steps: heating metal materials containing lead, tin, nickel, and the remaining component being copper to a liquid state, pouring them into a water-cooled copper mold and starting the water-cooling cycle to obtain a as-cast lead-tin bronze alloy; assembling the as-cast lead-tin bronze alloy in the blind hole on a copper sleeve to form a combined blank body; performing annealing treatment and applying a glass lubricant, and spraying a cubic boron nitride mold release agent spray on the mold; placing the combined blank body in a tapered mold for hot extrusion; and performing heat treatment to obtain a high-quality lead-tin bronze rod meeting the standards; the present invention can reduce the surface cracking problem caused by the contact friction between the lead-tin bronze and the mold, improve the hot brittleness problem in the hot working process of the alloy, inhibit the generation of cracking problems in the extrusion deformation process, and finally obtain a rod without crack defects on the surface and in the core.

The present invention provides a method for removing the lining of a rotary anode furnace. First, the auxiliary equipment and facilities around the furnace body are removed so that the anode furnace body can rotate 360 ​​degrees along its axis; then, the brick lining is manually cleared and grooved in the furnace body in a horizontal direction. During the groove process, the upper and lower brick bodies are supported and tightened by a screw rod. After the groove is completed, part of the screw rod is removed, and a waste copper mold with a weight of about 3 tons is added. The anode furnace body is rotated, and the waste copper mold is used to smash the adhesive and brick lining in the furnace, and large pieces are broken at the same time. The broken small pieces are poured out from the furnace mouth and the smoke outlet, so as to realize the rapid cleaning of the brick lining of the rotary anode furnace body. The method of the present invention greatly reduces the maintenance time of the anode furnace and improves the safety of the dismantling operation.

The invention discloses a TiZr-based high-entropy alloy with ultrahigh corrosion resistance and strong plasticity matching and a preparation method of the TiZr-based high-entropy alloy, and belongs to the technical field of high-entropy alloys. The chemical formula of the high-entropy alloy is TiaZrbNbcVd according to atomic percent, a is larger than or equal to 25 and smaller than or equal to 65, b is larger than or equal to 12 and smaller than or equal to 35, c is larger than or equal to 0 and smaller than or equal to 35, d is larger than or equal to 0 and smaller than or equal to 35, a + b + c + d = 100, and c and d cannot be 0 at the same time. According to the preparation method, the matching high-entropy alloy with ultrahigh corrosion resistance and strong plasticity is prepared through burdening, pretreatment, smelting and forming. According to the invention, a plurality of pure metal elements are smelted to form a master alloy ingot, and the copper mold is cooled by cooling circulating water to cast and mold the alloy. The alloy material is of a single BCC phase structure, has good strength and plasticity matching and has the ultrahigh pitting resistance potential exceeding 7.0 VSCE. The preparation process is simple, and is suitable for industrial large-scale popularization and production practice.

The invention discloses a high-elasticity amorphous alloy for music box tablets and a preparation method of the high-elasticity amorphous alloy. The amorphous alloy comprises Zr, Ti, Cu, Ni and Be elements. The sum of the atomic percent of all the elements is 100%, and the Zr accounts for 38%-55%, the Ti accounts for 8%-20%, the Cu accounts for 7.5%-15%, the Ni accounts for 5%-10%, and the Be accounts for 18%-30%. The Zr-based amorphous alloy prepared through the method has the low elastic modulus and damping ratio, the high elastic limit and the excellent corrosion resistance, when the Zr-based amorphous alloy is used for music box tablets, the sound key oscillation starting force can be reduced, and matched devices are prevented from being damaged; the allowable deformation of the sound key is improved, and the anti-deformation life is prolonged; vibration loss is reduced, pure timbre is ensured, and the service life of the music box is obviously prolonged; during preparation, the vibration frequency of the sound keys is simulated and optimized through finite elements, the sound sheet structure is designed through CAD, rapid solidification forming is achieved in cooperation with a copper mold suction casting process, the process is simple and convenient, and the yield is high.

The utility model belongs to the technical field of material preparation, and particularly relates to a quick-cooling adjustable non-water-cooling movable copper mold, which comprises a temperature controller, a copper mold, thermoelectric pieces and two thermocouples, the copper mold comprises a left half copper mold and a right half copper mold which are matched with each other and tightly attached, and the thermoelectric pieces comprise a left thermoelectric piece and a right thermoelectric piece. The left thermoelectric piece and the right thermoelectric piece are arranged in the left half copper mold and the right half copper mold respectively, thermocouple containing holes are formed in the left half copper mold and the right half copper mold, thermocouples are placed in the thermocouple containing holes, and the device solves the problems that an existing copper mold is not adjustable in cooling speed, depends on a water cooling medium and is inaccurate in temperature control. Cooling water does not need to be used, meanwhile, the faults such as waterway blockage and water leakage are avoided, the production and maintenance cost is reduced, and meanwhile consumption of water resources is reduced; and the copper mold comprises the left half copper mold and the right half copper mold which are detachable, so that the material demolding is more convenient due to the detachable copper mold structure, and the production efficiency is improved.

The invention discloses a method for manufacturing a copper mold. The method comprises the following steps of: forming a photoresist layer with the thickness between 3 microns and 5 microns on the outer surface of a copper mold; irradiating the photoresist layer with laser light in a reciprocating manner so as to thin the photoresist layer until the thickness of the photoresist layer is 0.25-0.35 micron, and defining the photoresist layer as a photoresist film; enabling exposure light to pass through interference or a photomask to enable the photoresist film to form a default holographic pattern layer; and carrying out chemical etching on the outer surface of the copper mold so as to form an impressing holographic pattern, wherein the depth of the embossed holographic pattern ranges from 0.25 micrometer to 0.35 micrometer. Therefore, the light resistance layer is thinned in an optical mode (such as the laser light), so that the light resistance film which is thin to a default value and has better uniformity can be formed on the outer surface of the copper mold, and the coining holographic pattern is favorably formed.

The utility model discloses a leather impressing device for processing bags and suitcases. The leather impressing device comprises a rack and a mounting assembly, symmetrically distributed sliding columns are slidably connected to the upper end of the rack, the lower ends of the sliding columns are fixedly connected with the upper surface of the supporting shell, and a lower mounting plate is arranged at the lower end of the supporting shell; the mounting assembly comprises sliding seats, clamping blocks, a bidirectional lead screw and nuts, the sliding seats are symmetrically connected to the lower end of the lower mounting plate in a sliding mode, the clamping blocks are arranged on the lower surfaces of the sliding seats, a copper mold is mounted between the two clamping blocks, and the connecting surfaces of the clamping blocks and the copper mold are obliquely arranged in the direction away from the transverse center of the copper mold from bottom to top; according to the leather coining device for luggage processing, a copper mold can be fixed through the acting force of butt clamping, the upward acting force can be generated while butt clamping is conducted, the good fixing effect is achieved, operation is conducted on the front side, and the coining effect is good. And the copper mold is convenient to replace and use.

The casting device comprises a top plate, a side plate and a bottom plate, a casting opening is formed in the middle of the top plate, four guide columns are symmetrically arranged at the four corners of the bottom of the top plate, and four positioning holes matched with the guide columns are symmetrically formed in the side plate and the bottom plate in a penetrating mode. The top plate, the side plate and the bottom plate are sequentially connected in a sliding mode through guide columns, the contact faces are tightly attached, two ejector pin through holes are symmetrically formed in the middle position of the top plate, two ejector pin holes corresponding to the ejector pin through holes in position are formed in the surface of the top of the bottom plate, ejector pins are installed in the ejector pin through holes and the ejector pin holes, and the ejector pins are arranged in the ejector pin through holes and the ejector pin holes. The top plate is connected with the bottom plate through an ejector pin; the casting thermal stress is reduced by increasing the stress release line of the top plate, and meanwhile, the service life of the copper mold in a high-temperature working environment is prolonged by adding rare earth elements to serve as a grain refiner and an inhibitor.

The application relates to the technical field of medium-entropy alloy, and discloses a low-melting-point high-energy-releasing zirconium-titanium-nickel active medium-entropy alloy and a preparation method thereof, which comprises the following steps: preparing raw materials, respectively taking granular pure titanium, granular pure zirconium and granular pure nickel according to preset atomic percentages; placing the raw materials in a non-consumable vacuum arc melting furnace and separately placing the preset titanium ingot in the furnace cavity, vacuumizing and introducing protective gas; melting the preset titanium ingot in the center of the furnace cavity to absorb residual oxygen, and the melting frequency is 1-5 times; after the arc is introduced, the melting current is kept at 190A-220A, electromagnetic stirring is supplemented, the mixed material of the granular pure titanium, the granular pure zirconium and the granular pure nickel is melted, the zirconium-nickel-titanium alloy is formed, the zirconium-nickel-titanium alloy is subjected to multiple melting, the melting time is controlled to be 2min-4min each time, each piece of alloy is subjected to melting for 4-8 times, and finally the alloy melt is rapidly cooled in a square water-cooled copper mold to be absorbed and cast into shape.

The invention discloses an ODS steel with an aluminum alloy coating and a preparation method thereof. High-purity iron, high-purity chromium, high-purity titanium, nano-yttrium oxide powder and high-purity aluminum wire are used as raw materials. First, pure and defect-free 436 stainless steel is obtained by vacuum arc melting, water-cooled copper mold suction casting and hot rolling. Then, nano-yttrium oxide is introduced by a surface stir friction treatment process. Then, the ODS steel with an aluminum alloy coating is prepared by arc spraying and vacuum diffusion annealing. The aluminum alloyed ODS steel layer in the invention is prepared by combining surface stir friction treatment and arc spraying process to obtain fine matrix grains and nano-scale dispersed particles uniformly distributed in the matrix, which can be used for the preparation of the ODS aluminum alloy coating.

This invention discloses an aluminum-based microalloyed, pitting-resistant bulk zirconium-based amorphous alloy and its preparation method. The zirconium-based amorphous alloy is composed of Zr, Ti, Cu, Ni, Be, and Al, with the following atomic percentage content: (Zr...) a Ti b Cu c Ni d Be e ) 100‑x Al x , among them, a+b+c+d+e=100, a=41.2, b=13.8, c=12.5, d=10, e=22.5, 0

The invention belongs to the field of metal material preparation, and discloses a Cu-Zn-Ti-Si alloy synergistically strengthened by a primary phase and a hypoeutectic structure and a preparation method for regulating components and cooling speed of the Cu-Zn-Ti-Si alloy. Comprising the following steps: (1) burdening; (2) in an argon atmosphere, heating pure copper until the pure copper is molten, and sequentially adding the copper-titanium intermediate alloy and the copper-silicon intermediate alloy; (3) after the intermediate alloy is completely melted, pressing the pure zinc block wrapped by the copper foil into the melt; (4) carrying out electromagnetic stirring, then raising the temperature to a target temperature, and carrying out flaming degassing treatment; and (5) after the melt is stable, pouring the melt into a preheated copper mold, monitoring a cooling curve in real time by using a built-in thermocouple, and accurately controlling the cooling rate by adjusting the preheating temperature and the pouring speed of the mold so as to obtain a target microstructure. The invention provides an effective technical approach for solving the problems that the matrix strength is insufficient and the hard phase is easy to fall off in the traditional single strengthening mode, and has important significance on the development of novel wear-resistant brass alloy.