Search

CN-122012980-A - Method for reinforcing hardness of W-Cu composite material by using W-atom cluster powder

CN122012980ACN 122012980 ACN122012980 ACN 122012980ACN-122012980-A

Abstract

The invention discloses a method for reinforcing the hardness of a W-Cu composite material by using W-cluster powder, and belongs to the technical field of reinforcing the hardness of the W-Cu composite material. The method comprises the following steps of SS1, adding W atom cluster powder, tungsten powder and copper powder into a ball mill in a protective atmosphere glove box for ball milling to prepare Composite powder, step SS2, step SS1 is carried out Adding the composite powder into a hot pressing furnace for hot pressing sintering to obtain A composite material. The invention prepares the W-atom cluster powder, tungsten powder and copper powder by ball milling and mixing through a planetary ball mill The composite powder is obtained by hot-pressing sintering The hardness of the W-Cu composite material is greatly improved by adding the W-atom cluster powder, and technical guidance is provided for developing high-performance tungsten-copper composite materials applied to the development of important equipment such as electric brush materials, abrasive electrode materials, friction materials, electromagnetic gun tracks and the like.

Inventors

  • HU GUORUI
  • SHI CHAOCHAO

Assignees

  • 南京原子制造研究所

Dates

Publication Date
20260512
Application Date
20260408

Claims (9)

  1. 1. The method for reinforcing the hardness of the W-Cu composite material by using the W-atom cluster powder is characterized by comprising the following steps of: Step SS1, adding W atom group powder, tungsten powder and copper powder into a ball mill in a protective atmosphere glove box for ball milling to prepare Composite powder; Step SS 2-the step SS1 is followed by Adding the composite powder into a hot pressing furnace for hot pressing sintering to obtain A composite material.
  2. 2. The method for reinforcing the hardness of the W-Cu composite material by using the W-cluster powder, which is disclosed in claim 1, is characterized in that the step SS1 specifically comprises the steps of weighing a certain amount of W-cluster powder, tungsten powder and copper powder according to a mass ratio of 1:4:5, placing the powder into a zirconia ball milling tank which is cleaned and dried by alcohol in a protective atmosphere glove box, adding zirconia grinding balls, and performing ball milling and mixing.
  3. 3. The method for reinforcing the hardness of the W-Cu composite material by using the W-cluster powder, which is disclosed in claim 1, is characterized in that the rotating speed of the ball mill is 200r/min, and the ball milling time is 12h.
  4. 4. The method for reinforcing hardness of a W-Cu composite material with a W-atom cluster powder according to claim 1, wherein the W-atom cluster powder has an average particle diameter of 1.9nm.
  5. 5. The method for reinforcing the hardness of a W-Cu composite material by using W-cluster powder according to claim 1, wherein the average particle size of the tungsten powder is 62nm.
  6. 6. The method for reinforcing the hardness of a W-Cu composite material with a W-cluster powder of claim 1, wherein the copper powder has an average particle size of 283nm.
  7. 7. The method for reinforcing the hardness of a W-Cu composite material by using the W-cluster powder according to claim 1, wherein the step SS1 specifically comprises the steps of ultrasonically cleaning a zirconia ball mill tank and zirconia grinding balls for a ball mill with alcohol for fifteen minutes, and drying the materials in a drying oven at 80 ℃ for fifteen minutes.
  8. 8. The method for reinforcing hardness of W-Cu composite material by using W-cluster powder as set forth in claim 1, wherein said step SS2 comprises the steps of mixing uniformly in a protective atmosphere glove box after ball milling Placing the powder into a silicon nitride mould which is cleaned and dried by alcohol ultrasonic, heating to 1050 ℃ at 10 ℃ per min in a hot pressing furnace, preserving heat for 1h at 100MPa pressure, then cooling at 10 ℃ per min, and cooling to room temperature along with the furnace to obtain the powder doped with 10% W atomic clusters A composite material.
  9. 9. The method for reinforcing the hardness of the W-Cu composite material by using the W cluster powder according to claim 8, wherein the step SS2 specifically comprises the steps of ultrasonically cleaning a silicon nitride mold in a hot pressing furnace with alcohol for fifteen minutes and drying the silicon nitride mold in a drying oven for fifteen minutes at 80 ℃.

Description

Method for reinforcing hardness of W-Cu composite material by using W-atom cluster powder Technical Field The invention relates to a method for reinforcing the hardness of a W-Cu composite material by using W-cluster powder, and belongs to the technical field of reinforcing the hardness of the W-Cu composite material. Background The tungsten-copper composite material has the advantages of high temperature resistance, arc ablation resistance, high heat conduction, high electric conduction, high strength and good corrosion resistance. The high-temperature-resistant material is widely applied to the fields of military high-temperature-resistant materials (jet tubes of missiles, rocket engines, gas rudders, air rudders, nose cones and the like in aerospace, electrical alloys for high-voltage switches, electric spark machining electrodes, microelectronic materials (semiconductor electronic packaging and heat sink materials), abrasive electrode materials, electric brush materials and the like. With the development of high-precision point weapons in the national defense field, higher requirements are put forward on the hardness and the conductivity of novel alloy materials with extreme performance such as W-Cu and the like. Especially in the tip weapon systems such as electromagnetic track cannons, W-Cu needs to withstand extreme application conditions. Under the extreme service condition, the electromagnetic gun track needs to bear high current density (MA level), severe thermal shock (high temperature reaches thousands DEG instantly), electromagnetic stress (GPa level) and high-speed friction and wear, and the W-Cu composite material needs to meet the performances of higher strength, high electric conductivity, high heat conductivity, wear resistance and arc ablation resistance. The tungsten-copper composite material prepared from tungsten and copper powder cannot meet the track requirements of electromagnetic cannons in terms of indexes such as strength, conductivity, ablation resistance and the like. The high electrical conductivity and strength in W-Cu composites is a contradiction. How to keep the high conductivity and the high hardness of the W-Cu composite material is a long-standing problem in the field of processing the W-Cu composite material. According to the search of the literature in the prior art, the Chinese patent application No. 202111299902.6 relates to a nano carbide reinforced fine-grain high-temperature W-Cu material, wherein the content of the nano carbide is TiC, zrC, hfC, the content of the nano carbide is 0.1-2wt%, and the balance is W. The method comprises the steps of preparing a W salt and Cu salt composite solution, carrying out solid-liquid compounding, carrying out high-temperature rapid atomization drying, carrying out hydro-thermal reduction, carrying out slow-release stress forming and sintering, and obtaining the nano carbide reinforced fine-grain high-temperature W-Cu material. Although the strength of the W-Cu composite material can be enhanced, doped carbide can be introduced, so that the conductivity of the W-Cu composite material is reduced. The conductivity and the hardness cannot be both ensured. Disclosure of Invention The invention aims to overcome the technical defects in the prior art, provides a method for reinforcing the hardness of a W-Cu composite material by using W-cluster powder, maintains high hardness while maintaining high conductivity of the W-Cu composite material, solves the problem that the W-Cu composite material prepared from the traditional tungsten powder copper powder cannot maintain high strength and high conductivity at the same time, and provides a solution for the research and development of the high-performance tungsten copper composite material. The method comprises the steps of firstly, ball milling and mixing W-atom cluster powder, tungsten powder and copper powder by a planetary ball mill to prepare the tungsten carbide powderThe composite powder is obtained by hot-pressing sinteringThe hardness of the W-Cu composite material is greatly improved by adding the W atomic cluster powder into the composite material. The invention adopts the following technical scheme that the method for enhancing the hardness of the W-Cu composite material by the W atomic cluster powder comprises the following steps: Step SS1, adding W atom group powder, tungsten powder and copper powder into a ball mill in a protective atmosphere glove box for ball milling to prepare Composite powder; Step SS 2-the step SS1 is followed by Adding the composite powder into a hot pressing furnace for hot pressing sintering to obtainA composite material. As a preferred embodiment, the step SS1 specifically comprises the steps of weighing a certain amount of W atom cluster powder, tungsten powder and copper powder according to a mass ratio of 1:4:5, placing the powder into a zirconia ball milling tank which is cleaned and dried by alcohol in an ultrasonic manner in a protective atm