44results about How to "Uniform alloying" patented technology

The invention discloses hull structural steel adapting to high heat input welding, which comprises the following chemical components in percentage by mass: 0.06 to 0.14 percent of C, 0.10 to 0.50 percent of Si, 0.80 to 1.80 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.008 percent of S, 0.020 to 0.050 percent of Nb, 0.006 to 0.030 percent of Ti, 0.0030 to 0.0100 percent of N, 0.015 to 0.045 percent of Al, 0.03 to 0.10 percent of V and the balance of Fe and inevitable impurities. The hull structural steel has the process characteristics that: the Ti is conveyed in a mode of steel wires formed by wrapping alloy powder by steel belts, and the addition process of the Ti is synchronous with the casting process, so that the alloying is more uniform, generated TiN mass points are finer and more dispersed, and the capacity of inhibiting grain growth is higher; and the production process is simple and convenient, and the method is suitable for batch production. When steel plates produced by the smelting method are subjected to high heat input welding under the condition of more than 50 kJ / cm, the toughness of welding heat affected zones is high.

The invention relates to a rare earth high-strength foam aluminum prepared through a melt foaming method. The rare earth high-strength foam aluminum is made of, by mass percentage, 85%-99.3% of aluminum powder or an aluminum ingot, 0.1%-2% of a rare earth additive, 0.3%-5% of a tackifier and 0.5%-6% of a blowing agent. The blowing agent is selected from one or more of particulate metal calcium, silicon carbide, alumina and ceramic particles. The blowing agent is selected from one or more of titanium hydride powder, lanthanum hydride powder and zirconium hydride powder. According to the rare earth high-strength foam aluminum, through holes and closed holes exist at the same time, and the pore size and density distribution are uniform; and the process has the beneficial effects of being low in production cost and facilitating large-scale production.

The invention relates to the preparation of titanium alloy, more specifically an Al-Nb-Ta intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Al 19-28%, Ta 23-27%, and balancing Nb. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, the raw material drying temperature being 70-80 deg. C, the drying time no less than 24 hours, calculated based on 1kg of Nb2O5, the charged mixture includes, Ta2O5 0.383-0.42kg, Al 0.75-0.913kg, CaF2 0.15-0.20kg, KCLO3 0.30-0.40kg, the raw material shoving temperature being 30-60 deg. C. The advantages of the invention include facilitated preparation of titanium alloy, low making cost, homogeneous alloying, good oxidation resistance, easy storing, transport and fragmenting.

The invention relates to the preparation of titanium alloy, more specifically an Al-Ti-Nb intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Al 2-10%, Si 3-30%, and balancing Nb. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, the raw material drying temperature being 70-80 deg. C, the drying time no less than 24 hours, calculated based on 1kg of Nb2O5, the charged mixture includes, TiO2 0.25-0.66kg, Al 0.115-0.46kg, CaF2 0.05-0.10kg, KclO3 0.07-0.12 kg, the raw material shoving temperature being 30-60 deg. C. The advantages of the invention include facilitated preparation of titanium alloy, low making cost, homogeneous alloying, good oxidation resistance, easy storing, transport and fragmenting.

The invention provides a powder metallurgy method for preparing superfine crystalline alloy by use of a micro-nano laminated sheet. The method comprises the steps of pre-preparing a micro-nano laminated matrix with preferred orientation and alloying element powder, mixing, and carrying out densification and sintering to form an ingot blank with a laminated structure, wherein the thickness of the alloying element powder is hundreds of nanometers, interlaminated interdiffusion is facilitated, alloying uniformity is realized, a texture formed by laminated superfine crystalline grains is obtained through further deformation processing, dislocation movement inside the crystalline grains is facilitated, and good plasticity is kept under a condition that the superfine crystalline strengthening and alloying strengthening mechanisms are brought into full play. The method saves time and energy, has low cost and wide application range, can be used for preparing bulked alloy material and has large-scale application potential, and the performances of the prepared alloy material are remarkably improved compared with the alloy material prepared by the conventional mechanical alloying method.

The invention relates to the preparation of titanium alloy, more specifically an Al-Nb intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Al 15-55%, and balancing Nb. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, the raw material drying temperature being 70-80 deg. C, the drying time no less than 24 hours, calculated based on 1kg of Nb2O5, the charged mixture includes, Al 0.423-1.07kg, CaF2 0.07-0.16kg, KCLO3 0.065-0.28kg, the raw material shoving temperature being 30-60 deg. C. The advantages of the invention include facilitated preparation of titanium alloy, low making cost, homogeneous alloying, good oxidation resistance, easy storing, transport and fragmenting.

The invention relates to the preparation of titanium alloy, more specifically an Al-Mo-V-Fe intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Al 5.5-17.2%, V 35-39%, Fe 3.8-5.5%, and balancing Mo. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, the raw material drying temperature being 70-80 deg. C, the drying time no less than 24 hours, calculated based on 1kg of MoO3, the charged mixture includes, V2O3 0.879-0.979kg, Fe 0.047-0.069%, Al 0.69-1.457kg, CaF2 0.05-0.4kg, KCLO3 0.14-0.20%, the raw material shoving temperature being 30-60 deg. C. The advantages of the invention include facilitated preparation of titanium alloy, low making cost, homogeneous alloying, good oxidation resistance, easy storing, transport and fragmenting.

The invention discloses a six-element intermediate alloy for preparation of a high-strength titanium alloy. The six-element intermediate alloy comprises, by weight, 19-27% of Al, 20-25% of Mo, 20-25% of V, 8-16% of Cr, 0.8-3% of Fe and the balance Ti. The invention also discloses a preparation method of the six-element intermediate alloy for preparation of a high-strength titanium alloy. The high-strength high-toughness titanium alloy prepared from the six-element intermediate alloy has high strength and good plasticity, can substantially reduce hidden trouble caused by incomplete melting of high-melting point elements such as Mo, V and Cr in melting and ingot casting, improves ingot casting purity and component uniformity and prevents quality defects caused by high density inclusion and beta spots.

The invention relates to the preparation of titanium alloy, more specifically an V-Al-Sn-Cr intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Al 5.5-13.5%, Sn 11-14%, Cr 11-14%, and balancing V. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, calculated based on 1kg of V2O5, the charged mixture includes, Al 0.51-0.758kg, SnO2 0.136-0.148 kg, CrO3 0.23-0.275kg, CaF2 0.2-0.3kg, furnace slag 0.25-0.35kg (produced during vanadium-chrome-aluminum alloy smelting), the raw material shoving temperature being 30-60 deg. C. The advantages of the invention include facilitated preparation of titanium alloy, low making cost, homogeneous alloying, good oxidation resistance, easy storing, transport and fragmenting.

The invention relates to the preparation of titanium alloy, more specifically an Al-Mo-Cr-Fe-Si intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Al 11.4-35%, Cr 20-28%, Fe 6-10%, Si 4.0-5.6%, and balancing Mo. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, the raw material drying temperature being 70-80 deg. C, the drying time no less than 24 hours, calculated based on 1kg of MoO3, the charged mixture includes, CrO3 0.71-0.99kg, Fe 0.20-0.33kg, Si 0.046-0.065kg, Al 0.663-1.92kg, CaF2 0.05-0.4kg, the raw material shoving temperature being 30-60 deg. C.

The invention relates to the preparation of titanium alloy, more specifically an Al-Mo-Si intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Mo 38-48%, Si 3.5-4.5%, and balancing Al. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, the raw material drying temperature being 70-80 deg. C, the drying time no less than 24 hours, calculated based on 1kg of Al, the charged mixture includes, industrial Si 0.034-0.044kg, MoO3 0.781-0.935kg, CaF2 0.36-0.42kg, KCLO3 0.149-0.174kg, the raw material shoving temperature being 30-60 deg. C. The advantages of the invention include facilitated preparation of titanium alloy, low making cost, homogeneous alloying, good oxidation resistance, easy storing, transport and fragmenting.

The invention relates to the preparation of titanium alloy, more specifically an V-Al-Cr-Mo intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Al 10%, Mo 22%, Cr 30%, and balancing V. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, calculated based on 1kg of V2O5, the charged mixture includes, CrO3 0.808-1.64kg, MoO3 0.136-0.42kg, Al 0.958-2.87kg, CaF2 0.03-0.08kg, furnace slag 0-0.20kg (produced during vanadium-chrome-aluminum alloy smelting), the raw material shoving temperature being 30-60 deg. C. The advantages of the invention include facilitated preparation of titanium alloy, low making cost, homogeneous alloying, good oxidation resistance, easy storing, transport and fragmenting.

The invention provides a preparation method of a titanium-tin intermediate alloy of a superconducting line. The method comprises the following steps: 1) weighing the following raw materials in percentage by weight: 72 to 78 percent of tin, and the balance of titanium sponge; 2) baking the titanium sponge at the temperature of between 65 and 105 DEG C, and cleaning a tin block; 3) placing the two metals in a consumable-electrode vacuum furnace, and smelting in a vacuum condition; 4) casting after smelting, cooling for 20 to 45 minutes in vacuum, discharging and demoulding; and 5) scalping the surface by using a lathe. In the method, titanium and tin are added in a binary alloy, complexity of singly and respectively adding a metal elementary substance can be avoided, the preparation of titanium alloy has a stable smelting process, low-density inclusion and high-density inclusion occurring in alloy cast ingot caused by a chipping phenomenon due to the fact that the metal elementary substances have discordant melting points are avoided, uniformity and stability of the cast ingot components are easily controlled, the production cost is low, alloying is uniform, the intermediate alloy is easily broken, and the preparation cost of the titanium alloy is reduced.

The invention provides an aluminum-vanadium-niobium-chromium intermediate alloy as well as a preparation method and application thereof. The aluminum-vanadium-niobium-chromium intermediate alloy comprises the following components in percentage by mass: 15%-22% of V, 1%-7% of Nb, 5%-11% of Cr and the balance of Al and inevitable impurities. The preparation method of the aluminum-vanadium-niobium-chromium intermediate alloy comprises the following steps: firstly, respectively preparing three binary intermediate alloys, namely primary alloys, by utilizing an aluminothermic reduction method; then, the primary alloy is refined through vacuum induction melting, and a secondary alloy is obtained; and finally, the secondary alloy and metal aluminum are subjected to vacuum induction melting, and the aluminum-vanadium-niobium-chromium intermediate alloy is prepared. The aluminum-vanadium-niobium-chromium intermediate alloy has the advantages of being uniform in component, low in element segregation and low in impurity content, and has very good application prospects and large-scale industrial popularization potential in the field of titanium alloy production through the additive manufacturing technology.

The invention relates to the preparation of titanium alloys, in particular to an aluminum-molybdenum-vanadium intermediate alloy used for the preparation of titanium alloys and a preparation method thereof. The alloy composition by weight percentage is as follows: Mo 9-13%, V9-13%, Al is the remainder; the preparation process is as follows: adopt the ignition smelting method outside the furnace, operate according to the conventional steps, the drying temperature of the raw material is 70~80 ℃, and the drying time is not less than 24 hours; 2 O 5 0.142~0.197kg, MoO 3 0.159~0.258kg, CaF 2 0.117~0.142kg, KClO 3 0.151~0.183kg; the charging temperature of the raw material is 30~60℃, the reaction is stable and the alloy is formed well. The advantages of the invention are: the preparation of titanium alloy is convenient, the cost is low, and the alloying is uniform; the invention has good oxidation resistance, easy storage and transportation, and good toughness.

The invention relates to a production method for low-apparent density brass powder. The production method comprises the steps that (1) an electrolytic copper powder finished product and zinc powder are evenly mixed; (2) after reducing atmosphere is led into materials obtained after mixing in the step (1), heating is carried out, and alloy powder is obtained; and (3) the alloy powder obtained in the step (2) is crushed and screened, obtained powder is added into an antioxidant to be evenly mixed, and brass powder is obtained. The production method has the beneficial effects that through mechanical mixing of the zinc powder and the electrolytic copper powder, even mixing can be guaranteed to a large extent, and the follow-up even alloying is further guaranteed; a diffusion-alloying technology is adopted, and it can be guaranteed that the content of zinc in the alloy powder is stable and easy to control; and the cathode copper powder with different low-apparent densities and different technological conditions are selected, the apparent density of the alloying powder can be manually controlled, and requirements of different industries are met.

The invention discloses a multi-electrode electroslag remelting device and an electroslag remelting process for high-nitrogen austenitic stainless steel, belongs to the technical field of electroslagremelting, and solves the technical problems that high-nitrogen austenitic stainless steel electroslag remelting equipment is expensive and the operation process is tedious. Nitriding alloys, low-carbon steel, manganese steel and other alloy materials with different elements and different contents are adopted, a plurality of electrode bars with the same length and different diameters are preparedin combination with calculation of the component proportion and the mass fraction of an electroslag ingot, and electroslag remelting of the high-nitrogen austenitic stainless steel is conducted. According to the multi-electrode electroslag remelting device and an electroslag remelting process, alloy elements of different electrode bars can enter a molten pool behind an electroslag layer simultaneously in a molten state according to a certain proportion in a normal pressure or high pressure state, and the components of the alloy elements of the molten pool at different heights before solidification are uniform; and meanwhile, alloying of the nitrogen element is stable in the solidification process, escape and segregation of nitrogen are less, the high content and homogenization of nitrogenare improved to a great extent, and the use performance of the high-nitrogen austenitic stainless steel electroslag steel ingot is effectively improved.

The invention relates to the preparation of titanium alloy, more specifically an Al-Mo-Si intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Mo 38-48%, Si 3.5-4.5%, and balancing Al. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, the raw material drying temperature being 70-80 deg. C, the drying time no less than 24 hours, calculated based on 1kg of Al, the charged mixture includes, industrial Si 0.034-0.044kg, MoO3 0.781-0.935kg, CaF2 0.36-0.42kg, KCLO3 0.149-0.174kg, the raw material shoving temperature being 30-60 deg. C. The advantages of the invention include facilitated preparation of titanium alloy, low making cost, homogeneous alloying, good oxidation resistance, easy storing, transport and fragmenting.

The invention relates to a ternary alloy for improving the titanium alloy ingredient homogeneity and a preparing method and application of the ternary alloy. A ternary intermediate alloy for improving the TC11 titanium alloy ingredient homogeneity is provided, and is basically composed of 5%-6% of Si, 55%-60% of Mo and the balance Al. Meanwhile, a preparing method and application of the ternary intermediate alloy are further provided. The ternary intermediate alloy is suitable for serving as a raw material of a high-strength high-temperature titanium alloy TC11; compared with other ternary alloys, the weight percentage of the Si is improved, the ingredient scope of the high-melting-point element Mo is shrunk, and therefore the smelting process of the ternary alloy is controllable, smelted cast condition blocks are better in crushing performance, powder-like products with the granularity smaller than or equal to 1 mm can be obtained, the ingredient homogeneity of the main elements including Si, Mo and Al in the TC11 alloy can be effectively improved, the probability that the high-melting-point element Mo forms high density inclusion segregation defects in the cast ingot smelting process is reduced, and the ingredient homogeneity of TC11 titanium alloy cast ingots and titanium materials is guaranteed.

The invention belongs to the field of metallurgy of iron and steel, in particular relates to a method for alloying vanadium in molten steel by using ferrovanadium fine powder in an RH station. The method solves the technical problem that fine powder containing vanadium is difficult to be utilized effectively. The invention aims to provide a method for alloying molten steel by using FeV50 fine powder with the granularity of 5-15 millimeters in an RH molten steel refining station. The method not only has no effect on a steel making mission and a production organization, but also ensures that the FeV50 fine powder resource with the granularity of 5-15 millimeters can be fully utilized. The method has the characteristics of simple operation, easy control, high yield of metal vanadium, and the like. The invention provides a new selection for fully and effectively utilizing the vanadium resource and reducing the production cost in the steel making process.

The invention relates to the preparation of titanium alloy, more specifically an Al-Mo-Sn-Si intermediate alloy for titanium alloy preparation and process for preparing the same, wherein the constituents (by weight percent) of the alloy include, Mo 24-32%, Sn 15.5-23.5%, Si 1.8-3.2%, and balancing Al. The preparing process comprises, employing furnace outside ignition smelting method, operating according to routine procedures, the raw material drying temperature being 70-80 deg. C, the drying time no less than 24 hours, calculated based on 1kg of Al, the charged mixture includes, MoO3 0.653-0.806kg, Sn 0.287-0.368kg, Si 0.012-0.027 kg, CaF2 0.13-0.286kg, KCLO3 0.11-0.193kg, the raw material shoving temperature being 30-60 deg. C. The advantages of the invention include facilitated preparation of titanium alloy, low making cost, homogeneous alloying, good oxidation resistance, easy storing, transport and fragmenting.

The present invention relates to the preparation of titanium alloys, in particular to a molybdenum vanadium chromium master alloy used for the preparation of titanium alloys and a preparation method thereof. The alloy composition in terms of weight percent is: Mo 18-26%, Cr 27-35%, Al 0% to 10%, V is the balance; the preparation process is as follows: adopt the ignition smelting method outside the furnace, operate according to the conventional steps, and the weight composition of the ingredients is expressed as V 2 o 5 For 1kg, MoO 2 0.26~0.339kg, CrO 3 0.9~1.16kg, Al 0.75~1.50kg, CaF 2 0.05~0.12kg; the furnace temperature of raw materials is 30~60℃, the reaction is stable, and the alloy is formed well. The invention has the advantages of convenient preparation of titanium alloy, low cost and uniform alloying; the invention has good oxidation resistance, is easy to store and transport, and is easy to break.

The present application relates to the technical field of target material preparation, and provides a high-boron-doped silicon target material, a preparation method thereof, and a solar cell. The preparation method comprises: mixing silicon-boron compound powder and silicon powder to obtain a mixed powder; thermally spraying the mixed powder, and then mechanically crushing to obtain a silicon-boron alloy block; airflow crushing the silicon-boron alloy block to obtain a silicon-boron alloy powder; thermally spraying the silicon-boron alloy powder onto a back tube, and then machining to obtain a silicon target material. The present application thermally sprays a mixed powder of silicon-boron compound powder and silicon powder, so that the silicon-boron compound powder and the silicon powder are heated to a molten or semi-molten state, so that the silicon-boron compound powder and the silicon powder are firmly combined to form a silicon-boron alloy, so that the silicon-boron compound is not separated after airflow crushing, which helps to improve the boron deposition rate and accurately control the boron content of the silicon target material. As a master alloy with a high boron content, the silicon-boron compound is not affected by the low solid solubility of boron in silicon, and it is easy to prepare a high-boron-doped silicon target material.

The invention relates to the technical field of target material preparation, and provides a high-boron doped silicon target material, a preparation method thereof and a solar cell. The preparation method comprises the following steps: mixing silicon boron compound powder and silicon powder to obtain mixed powder; the mixed powder is subjected to thermal spraying treatment and then mechanically crushed to obtain a silicon-boron alloy block; the silicon-boron alloy block is subjected to airflow crushing, and silicon-boron alloy powder is obtained; and thermally spraying the silicon-boron alloy powder onto the back tube, and then machining to obtain the silicon target material. According to the method, the mixed powder of the silicon-boron compound powder and the silicon powder is subjected to thermal spraying, so that the silicon-boron compound powder and the silicon powder are heated to the molten or semi-molten state, the silicon-boron compound powder and the silicon powder are firmly combined to form the silicon-boron alloy, the silicon-boron compound is not separated after air jet pulverization, and the silicon-boron alloy is not separated after air jet pulverization. And the boron deposition rate can be increased, and the boron content of the silicon target material can be accurately controlled. The silicon-boron compound serving as a mother alloy with high boron content is not influenced by low solid solubility of boron in silicon, and the high-boron-doped silicon target material is easy to prepare.

The present invention relates to the preparation of titanium alloys, in particular to an aluminum-molybdenum-niobium-silicon master alloy used for the preparation of titanium alloys and a preparation method thereof. The alloy composition by weight percentage is: Al 8-12%, Nb 14-16%, Si 0.8 ~ 1.0%, Mo is the balance; the preparation process is: adopt the ignition smelting method outside the furnace, operate according to the conventional steps, the raw material drying temperature is 70 ~ 80 ℃, and the drying time is not less than 24 hours; the weight of ingredients is composed of 1kg MoO 3 Count: Nb 2 o 5 0.373~0.43kg, Al 0.763~1.14kg, Si0.010~0.013kg, MoO 2 1kg, CaF 2 0.05~0.415kg; the furnace temperature of raw materials is 30~60℃, the reaction is stable, and the alloy is formed well. The invention has the advantages of convenient preparation of titanium alloy, low cost and uniform alloying; the invention has good oxidation resistance, is easy to store and transport, and is easy to break.

The application relates to the technical field of aluminum-lithium alloy processing, and particularly discloses a low-cost high-quality aluminum-lithium alloy preparation method, which comprises the following steps: concentrating aluminum alloy raw materials without lithium to carry out smelting, then refining and degassing to obtain a base aluminum alloy melt; maintaining and heat-insulating the base aluminum alloy melt; introducing inert gas into a transition cabin and a sealed cabin to keep the sealed cabin and the transition cabin in a micro-positive pressure state and keep the pressure in the sealed cabin higher than that in the transition cabin; placing the base aluminum alloy melt in a tundish, then transferring the tundish into the transition cabin, closing an outer cabin door, and introducing inert gas into the transition cabin; opening an inner cabin door, closing the inner cabin door after transferring the tundish into the sealed cabin, adding pure lithium raw materials into the base aluminum alloy melt, and stirring the pure lithium raw materials uniformly; and then pressure casting to obtain an aluminum-lithium alloy pressure casting part. The application can effectively avoid oxidation of lithium elements, guarantee high cleanliness and component accuracy of the melt, reduce production cost, and is suitable for popularization and application.

The application discloses additive manufacturing 5-series aluminum alloy powder material containing Ce and Yb elements and a preparation method thereof, and comprises the following steps: preparing a mixed material by weighing raw materials according to component proportions, and preparing Al-Mg-Sc-Yb-Ce-Mn-Si pre-alloy powder through vacuum melting and argon atomization, wherein the raw materials are as follows in terms of mass fraction: Mg: 4-12%, Sc: 0.6-0.8%, Zr: 0.1-0.8%, Mn: 0.2-0.5%, Si: 0.3-1.0%, Yb: 0.03-0.8%, Ce: 0.03-0.8%, and the rest is Al and other impurities. The application adds a certain amount of rare earth elements (Yb and Ce) and Mn and Si elements in the traditional AlMgScZr alloy powder, forms a second phase with alloy elements, plays a role in refining grains and improving crack resistance as a refining agent, controls the process, obtains powder with a certain particle size range through airflow screening, carries out additive manufacturing according to a certain process window, and through heat treatment, the strength of the additive manufacturing high-strength and high-toughness aluminum alloy is improved to 550 MPa level while maintaining high plasticity and toughness.

A high specific surface area transition metal powder and a preparation method thereof belong to the field of metal powder smelting and processing. The method uses transition metal powder as a raw material, metal nickel powder or electrodeposited nickel as an alloying nickel source, and completes the alloying process in a molten salt. The reaction product is removed from the molten salt, cooled, ultrasonically washed and dried to obtain alloy powder. The process of dealloying nickel in the alloy powder is completed by pickling method or electrochemical anodizing method, ultrasonic cleaning and drying with water, and finally the synthesis process of transition metal powder with high specific surface area is realized. The prepared high specific surface area transition metal powder has a specific surface area of ​​0.5-10m 2 / g. This method uses the alloying-dealloying process to adjust the surface and internal structure of the transition metal at the atomic level to achieve the purpose of regulating the specific surface area of ​​the metal powder.