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CN-117626056-B - High-strength pure nickel wire and preparation method thereof

CN117626056BCN 117626056 BCN117626056 BCN 117626056BCN-117626056-B

Abstract

The invention relates to a high-strength pure nickel wire and a preparation method thereof, wherein the mass percentage of each component of the wire is 0.05% -0.15% of C,0.05% -0.15% of Mn,0.10% -0.35% of Si,0.10% -0.50% of additive element X and the balance of Ni, the C, mn, si and X are all dissolved in a nickel-based solid solution with a face-centered cubic structure, and the tensile strength of the wire is 400-500 mpa. The wire rod has the advantages of high tensile strength, stable mechanical property and controllable mechanical property of alloy, and is particularly suitable for preparing high-strength pure nickel filter screens.

Inventors

  • YU WENXIN
  • WU DA
  • YANG XIANJUN
  • XU YONGHONG
  • WANG FENGHONG

Assignees

  • 重庆川仪自动化股份有限公司

Dates

Publication Date
20260505
Application Date
20231124

Claims (8)

  1. 1. The high-strength pure nickel wire is characterized in that the mass percentage of each component of the wire is 0.05% -0.15% of C,0.05% -0.15% of Mn,0.10% -0.35% of Si,0.10% -0.50% of additive element X and the balance of Ni; The C, mn, si and X are all dissolved in nickel-based solid solution with face-centered cubic structure; the tensile strength of the wire rod is 400-500 mpa; The additive element X is a combination of at least four of Ti, V, ce, la, cr, mo, wherein the additive element X comprises 0.05-0.25% by mass of Ti, 0.05-0.25% by mass of V, 0.10-0.30% by mass of Ce, 0.10-0.30% by mass of La, 0.05-0.25% by mass of Cr, 0.05-0.25% by mass of Mo, and the total mass of the additive element X is 0.10-0.50% by mass; The wire rod is obtained by the following steps: homogenizing annealing The components are subjected to vacuum melting, cast ingots obtained by casting are forged into billets and hot rolled, and wire rods are obtained after hot rolling, wherein the wire rods are subjected to homogenizing annealing at 900-1050 ℃ for 1-3 hours, and are rapidly cooled by water after being discharged from a furnace, so as to obtain wire rod blanks; Drawing Homogenizing and annealing the wire blank, and drawing the wire blank into a wire; Recrystallization annealing And drawing to obtain filaments, carrying out secondary recrystallization annealing on the filaments, wherein the temperature of the secondary recrystallization annealing is 850-1000 ℃ for 3-5 minutes, and rapidly cooling to room temperature, and the cooling speed is more than or equal to 30 ℃ per second.
  2. 2. The wire rod according to claim 1, wherein the mass percentage of each component of the wire rod is 0.10% -0.12% of C,0.10% -0.12% of Mn,0.10% -0.15% of Si,0.10% -0.50% of additive element X and the balance of Ni.
  3. 3. A method of producing a wire rod according to any one of claims 1 to 2, characterized by the steps of: 1) Vacuum melting Proportioning the components according to any one of the wires of claims 1-2, smelting in vacuum with the vacuum degree less than or equal to 30pa, and casting to obtain cast ingots; 2) Homogenizing annealing The ingot is forged into a blank and hot rolled, and the wire rod is obtained after hot rolling, and is subjected to homogenizing annealing at 900-1050 ℃ for 1-3 hours, and is rapidly cooled by water after being discharged from a furnace, so as to obtain a wire rod blank; 3) Drawing Homogenizing and annealing the wire blank, and drawing the wire blank into a wire; 4) Recrystallization annealing And drawing to obtain filaments, carrying out secondary recrystallization annealing on the filaments, wherein the temperature of the secondary recrystallization annealing is 850-1000 ℃ for 3-5 minutes, and rapidly cooling to room temperature, and the cooling speed is more than or equal to 30 ℃ per second.
  4. 4. The method of claim 3, wherein the diameter of the wire rod in step 2) is 8.0-12.0 mm.
  5. 5. The method of claim 3, wherein the wire in step 3) has a diameter of 3.0 to 5.0mm.
  6. 6. The method of claim 3, wherein the filaments in step 4) have a diameter of 0.8 to 1.5mm.
  7. 7. The method of claim 3, wherein the rapid cooling in step 4) is water-cooled.
  8. 8. Use of the wire according to any one of claims 1-2 for the manufacture of a filter screen.

Description

High-strength pure nickel wire and preparation method thereof Technical Field The invention belongs to the field of metal materials, and particularly relates to a high-strength pure nickel wire and a preparation method thereof. Background Pure nickel is subject to corrosion in an oxidizing environment, and has excellent corrosion resistance because a protective film is easily formed on the surface of the pure nickel to prevent further corrosion. Meanwhile, the composite material also has high temperature resistance and high temperature structural stability, so that the composite material is commonly used for manufacturing parts in the chemical industry, nuclear power industry, aerospace industry and aviation industry. The pure nickel has the most widely used national standard marks of N4 and N6, has better corrosion resistance, and has tensile strength of 300-400 mpa. The metal filter screen is commonly used for aviation filters, water purifier filters and the like, and has better corrosion resistance and higher tensile strength. The metal filter screen wire rod needs to have good corrosion resistance, and meanwhile, the tensile strength needs to meet 400-500 mpa, so that the service life of the filter screen is ensured. The strength of the pure nickel strip at home and abroad is strictly and equally compared, the tensile strength of the strip is improved by improving the content of Mn, fe, si and other elements at home and abroad, and the improvement of the tensile strength of the pure nickel is limited. The research of the method is that the cold rolling deformation of the strip is controlled to be 9% in a mechanical straightening mode, and the tensile strength is improved to 420-450 mpa. For the filter screen wire rod, the stress-free influence of the material needs to be ensured to ensure the stability of the use process, so that the cold working mode for improving the tensile strength is not applicable. Yang Zhe and the like analyze the influence of alloy elements on the pure nickel strip, and find that the tensile strength of the pure nickel strip can be effectively improved by improving the C, mg content in the pure nickel strip, and C element mainly forms NiC with Ni, so that the grain boundary is easy to weaken and brittle fracture occurs due to the fact that the grain boundary is easy to form. The existence of Mg element can improve the nucleation rate of pure nickel, and refine grains so as to improve the tensile strength. As Mg element is more active, the yield of the Mg element after smelting is greatly influenced by the cleanliness and purity of raw materials and the vacuum degree of smelting equipment, the content of the Mg element in production and application is difficult to control, and the method has no strong feasibility. Most of the existing pure nickel materials have the strength reaching about 400MPa by optimizing components, but are easy to break in the process of preparing fine wires to draw, and the product quality is unstable. Disclosure of Invention The invention aims to provide a high-strength pure nickel wire and a preparation method thereof, wherein the pure nickel wire has the advantages of high tensile strength (the tensile strength is 400-500 mpa), stable and controllable mechanical properties by adding microelements and an annealing process, and is particularly suitable for preparing a high-strength pure nickel filter screen. The technical scheme of the invention is as follows: the high-strength pure nickel wire comprises, by mass, 0.05% -0.15% of C,0.05% -0.15% of Mn,0.10% -0.35% of Si,0.10% -0.50% of additive element X and the balance of Ni; The C, mn, si and X are all dissolved in nickel-based solid solution with face-centered cubic structure; The tensile strength of the wire rod is 400-500 mpa. According to a further technical scheme, the alloy comprises, by mass, 0.10% -0.12% of C,0.10% -0.12% of Mn,0.10% -0.15% of Si,0.10% -0.50% of additive element X and the balance of Ni; the additive element X is a combination of at least four of Ti, V, ce, la, cr, mo. The additive element X comprises 0.05-0.25% of Ti, 0.05-0.25% of V, 0.10-0.30% of Ce, 0.10-0.30% of La, 0.05-0.25% of Cr, 0.05-0.25% of Mo and 0.10-0.50% of total mass percent of the additive element X. The preparation method of the wire rod comprises the following steps: 1) Vacuum melting Taking all the components according to the proportion of the wire rod, adopting vacuum smelting, and casting to obtain cast ingots, wherein the vacuum degree is less than or equal to 30 pa; 2) Homogenizing annealing The ingot is forged into a blank and hot rolled, and the wire rod is obtained after hot rolling, and is subjected to homogenizing annealing at 900-1050 ℃ for 1-3 hours, and is rapidly cooled by water after being discharged from a furnace, so as to obtain a wire rod blank; 3) Drawing Homogenizing and annealing the wire blank, and drawing the wire blank into a wire; 4) Recrystallization annealing And drawing to obtain fi