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CN-117701966-B - Tungsten alloy material and preparation method and application thereof

CN117701966BCN 117701966 BCN117701966 BCN 117701966BCN-117701966-B

Abstract

The invention provides a tungsten alloy material and a preparation method and application thereof, wherein the preparation raw materials of the tungsten alloy material comprise 90-93wt% of tungsten, 0.1-1wt% of additive and the balance of binder phase material, the additive comprises any one or a combination of at least two of hafnium hydride, titanium hydride or zirconium hydride, and the tungsten alloy material provided by the invention has room temperature tensile strength of 1550MPa or more, room temperature elongation at break of 10% or more and room temperature impact toughness of 80J/cm 2 or more, and is suitable for armor-piercing materials.

Inventors

  • YAN BINYOU
  • SONG JIUPENG
  • LIU YANG
  • HUANG ZEXI
  • LIN BAOZHI
  • HUANG ZHAOHUI

Assignees

  • 厦门钨业股份有限公司

Dates

Publication Date
20260508
Application Date
20231214

Claims (19)

  1. 1. The tungsten alloy material is characterized by comprising, by mass, 90-93% of tungsten, 0.1-1% of an additive and the balance of a binder phase material; the additive comprises any one or a combination of at least two of hafnium hydride, titanium hydride or zirconium hydride; The tungsten alloy material is prepared by a preparation method comprising the following steps: Mixing the preparation raw materials of the tungsten alloy material according to the formula amount, and then sequentially carrying out cold isostatic pressing, sintering, heat treatment and at least one rotary forging annealing treatment to obtain the tungsten alloy material; the rotary forging annealing treatment comprises rotary forging and annealing treatment, wherein when the accumulated deformation of the rotary forging is 25-50%, the annealing treatment is carried out, and at least one rotary forging is carried out after the final annealing treatment; the accumulated deformation after the rotary forging annealing treatment is more than 31 percent.
  2. 2. A tungsten alloy material according to claim 1, wherein the binder phase material comprises nickel and/or iron.
  3. 3. The tungsten alloy material according to claim 2, wherein the raw materials for preparing the tungsten alloy material comprise 90-93wt% of tungsten, 0.1-1wt% of additive, 3.5-7.5wt% of nickel and 1.5-3.5wt% of iron in percentage by mass.
  4. 4. A method of producing a tungsten alloy material as claimed in any one of claims 1 to 3, comprising the steps of: Mixing the preparation raw materials of the tungsten alloy material according to the formula amount, and then sequentially carrying out cold isostatic pressing, sintering, heat treatment and at least one rotary forging annealing treatment to obtain the tungsten alloy material; the rotary forging annealing treatment comprises rotary forging and annealing treatment, wherein when the accumulated deformation of the rotary forging is 25-50%, the annealing treatment is carried out, and at least one rotary forging is carried out after the final annealing treatment; the accumulated deformation after the rotary forging annealing treatment is more than 31 percent.
  5. 5. The method according to claim 4, wherein the tungsten has a particle diameter D50 of 0.5 to 5. Mu.m.
  6. 6. The process according to claim 4, wherein the additive has a particle diameter D50 of 0.5 to 5. Mu.m.
  7. 7. The method according to claim 6, wherein the nickel has a particle diameter D50 of 0.5 to 5. Mu.m.
  8. 8. The method according to claim 6, wherein the iron has a particle diameter D50 of 0.5 to 5. Mu.m.
  9. 9. The method according to claim 4, wherein the cold isostatic pressure is 150-300MPa.
  10. 10. The method of claim 4, wherein the cold isostatic pressed material is a green rod.
  11. 11. The method of manufacturing according to claim 4, wherein the sintering comprises liquid phase sintering.
  12. 12. The method according to claim 4, wherein the sintering is performed at a temperature of 1400-1500 ℃ for a time of 60-180min.
  13. 13. The method according to claim 4, wherein the sintering is performed in a reducing atmosphere.
  14. 14. The method according to claim 4, wherein the heat treatment is carried out at a temperature of 1000-1300 ℃ for 60-180min at an absolute pressure of 1Pa or less.
  15. 15. The method of claim 4, wherein the temperature of the swaging is 450-650 ℃.
  16. 16. The method of claim 4, wherein the single pass deformation of the swaging is 8-15%.
  17. 17. The method according to claim 4, wherein the annealing treatment is carried out at a temperature of 800-1000 ℃ for 60-180min under an absolute pressure of 1Pa or less.
  18. 18. The preparation method according to claim 4, characterized in that the preparation method comprises the steps of: (1) Mixing the preparation raw materials of the tungsten alloy material according to the formula amount to obtain a mixture; wherein, the particle diameter D50 of tungsten in the preparation raw material is 0.5-5 mu m, the particle diameter D50 of the additive is 0.5-5 mu m, the particle diameter D50 of nickel is 0.5-5 mu m, and the particle diameter D50 of iron is 0.5-5 mu m; (2) Carrying out cold isostatic pressing on the mixture obtained in the step (1) under the pressure of 150-300MPa to obtain a rod-shaped green body; (3) Carrying out liquid phase sintering on the rod-shaped green body obtained in the step (2) to obtain a sintered body, wherein the liquid phase sintering is carried out in a reducing atmosphere at 1400-1500 ℃ for 60-180min; (4) Carrying out heat treatment on the sintered blank obtained in the step (3), and cooling after the heat treatment is finished to obtain a heat-treated bar, wherein the temperature of the heat treatment is 1000-1300 ℃, the time is 60-180min, and the absolute pressure is less than or equal to 1Pa; (5) And (3) performing at least one-time rotary forging annealing treatment on the heat-treated bar material obtained in the step (4) to obtain the tungsten alloy material, wherein the rotary forging annealing treatment comprises rotary forging and annealing treatment, the rotary forging temperature is 450-650 ℃, the single-pass deformation amount is 8-15%, when the cumulative deformation amount of the rotary forging is 25-50%, the annealing treatment is performed at least one-pass rotary forging after the final annealing treatment, the cumulative deformation amount after the rotary forging annealing treatment is more than 31%, the annealing treatment temperature is 800-1000 ℃, the heat preservation time is 60-180min, and the absolute pressure is less than or equal to 1Pa.
  19. 19. Use of a tungsten alloy material according to any one of claims 1-3 or obtained by a method according to any one of claims 4-18, for a armor piercing material.

Description

Tungsten alloy material and preparation method and application thereof Technical Field The invention belongs to the technical field of alloys, and relates to an alloy material, in particular to a tungsten alloy material and a preparation method and application thereof. Background The high specific gravity tungsten alloy is a refractory metal alloy material composed of refractory metal element tungsten, transition metal nickel, iron, cobalt, copper and other elements, and the microstructure of the material is composed of a transition metal binding phase with the refractory metal element in solid solution and refractory metal particles, has the structural and functional characteristics, has the advantages of high density, high strength, high hardness, high ductility, high toughness, high dynamic mechanical properties and the like, and plays an important role in the high-speed damage process. With the development and progress of modern technology, higher requirements are put on the comprehensive properties of high specific gravity tungsten alloy materials, for example, the high density, the ultrahigh strength, the high ductility, the high toughness and the like are required to be combined. CN113881881A discloses a high-strength high-specific gravity tungsten alloy material and a preparation method thereof, wherein the density of the high-specific gravity tungsten alloy material is 98.56-99.30%, the hardness is 408.72-435.79HV, the tensile strength is 1250-1380MPa, the tungsten content is 92.4-93wt%, the balance is nickel, iron, cobalt, zirconium oxide and unavoidable impurities, the mass ratio of nickel, iron and cobalt is 3.85:1.65:1.5, the zirconium oxide content is 0-0.6wt%, and the material is prepared by adopting reduced tungsten powder, hydroxy nickel powder, hydroxy iron powder, reduced cobalt powder and nano zirconium oxide as raw materials and sequentially performing ball milling powder mixing, cold isostatic pressing molding, solid phase sintering, short-time liquid phase sintering, dehydrogenation heat treatment and rotary forging. According to the scheme, although the room-temperature tensile strength of the obtained high-strength high-specific gravity tungsten alloy material can reach 1280-1380MPa, the tensile strength is still not high enough, the room-temperature ductility and impact toughness are poor, and the comprehensive performance of the material still has a large improvement space. Therefore, there is a need to provide a tungsten alloy material with further improved tensile strength and both room temperature ductility and impact toughness, and a method for preparing the same and applications thereof. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide a tungsten alloy material, a preparation method and application thereof, wherein the tungsten alloy material has good room-temperature tensile strength, room-temperature elongation at break and room-temperature impact toughness, and is suitable for armor-piercing materials. To achieve the purpose, the invention adopts the following technical scheme: in a first aspect, the invention provides a tungsten alloy material, wherein the preparation raw materials of the tungsten alloy material comprise 90-93wt% of tungsten, 0.1-1wt% of additive and the balance of binder phase material in percentage by mass; the additive includes any one or a combination of at least two of hafnium hydride, titanium hydride, or zirconium hydride, including typically but not limited to a combination of hafnium hydride and titanium hydride, a combination of titanium hydride and zirconium hydride, a combination of hafnium hydride and zirconium hydride, or a combination of hafnium hydride, titanium hydride and zirconium hydride. In the tungsten alloy material provided by the invention, the mass percent of tungsten is 90-93wt%, for example, 90wt%, 90.5wt%, 91wt%, 91.5wt%, 92wt%, 92.5wt% or 93wt%, but the tungsten alloy material is not limited to the listed values, and other non-listed values in the numerical range are applicable. In the tungsten alloy material provided by the invention, the mass percent of the additive is 0.1-1wt%, for example, 0.1wt%, 0.3wt%, 0.5wt%, 0.6wt%, 0.8wt% or 1wt%, but the tungsten alloy material is not limited to the listed values, and other non-listed values in the numerical range are applicable. The tungsten alloy material provided by the invention uses at least one of hafnium hydride, titanium hydride or zirconium hydride as an additive, and at least has the advantages that the additive can react with nonmetallic impurity elements in other raw materials in the heat treatment process for preparing the tungsten alloy material, the interface of the alloy material is purified, the strength and toughness of the tungsten alloy material are improved, (b) the additive can generate a trace dispersion strengthening phase in the sintering process, the grain size of tungsten is refined, the strength of th