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CN-122013018-A - Soft magnetic alloy and preparation method thereof

CN122013018ACN 122013018 ACN122013018 ACN 122013018ACN-122013018-A

Abstract

The application relates to the technical field of soft magnetic alloy, in particular to a soft magnetic alloy and a preparation method thereof. The preparation method comprises the steps of providing a soft magnetic alloy blank, carrying out plastic deformation treatment on the soft magnetic alloy blank to obtain a plastic deformation piece, and carrying out post-treatment on the plastic deformation piece, wherein the post-treatment comprises at least one electric pulse treatment and at least one annealing heat treatment to obtain the soft magnetic alloy. According to the method provided by the embodiment of the application, the magnetically soft alloy blank is subjected to plastic deformation, and the obtained product of plastic deformation is subjected to electric pulse treatment and annealing heat treatment, so that the yield strength and the elongation of the obtained magnetically soft alloy are obviously improved, and meanwhile, the coercive force of the magnetically soft alloy is effectively reduced, so that the magnetically soft alloy has excellent strength, excellent toughness and excellent magnetism.

Inventors

  • WANG DAHAO
  • LI ZHENLEI
  • ZHANG YUANXIANG
  • WU FAN
  • WANG ZHEN
  • WANG GUODONG

Assignees

  • 东北大学
  • 西安重型技术有限责任公司

Dates

Publication Date
20260512
Application Date
20260416

Claims (10)

  1. 1. A method for preparing a soft magnetic alloy, comprising the steps of: Providing a soft magnetic alloy blank, wherein the soft magnetic alloy blank comprises 49% -51% by mass of cobalt element, 0.8% -1.8% by mass of vanadium element, not more than 0.04% by mass of carbon element, not more than 0.3% by mass of manganese element, not more than 0.3% by mass of silicon element, not more than 0.02% by mass of phosphorus element, not more than 0.02% by mass of sulfur element, not more than 0.02% by mass of copper element, not more than 0.05% by mass of nickel element, and the balance of iron element and unavoidable impurities; performing plastic deformation treatment on the soft magnetic alloy blank to obtain a plastic deformation piece; and carrying out post-treatment on the plastic deformation piece, wherein the post-treatment comprises at least one electric pulse treatment and at least one annealing heat treatment so as to obtain the soft magnetic alloy.
  2. 2. The method according to claim 1, wherein the plastic deformation treatment comprises warm rolling, and the soft magnetic alloy blank is kept at 600-800 ℃ for 10-60 min before the warm rolling, and the rolling reduction is 55% -75%.
  3. 3. The manufacturing method according to claim 1, wherein the plastic deformation treatment includes cold rolling, and the cold rolling includes: And (3) carrying out cold rolling on the soft magnetic alloy blank at room temperature, wherein the rolling reduction rate of the cold rolling is 50-85%.
  4. 4. The method of claim 1, wherein the post-treatment is: and performing the electric pulse treatment, and then performing the annealing heat treatment on the electric pulse treatment product.
  5. 5. The method of claim 1, wherein the post-treatment is: and firstly carrying out annealing heat treatment, then cooling the annealing heat treatment product to room temperature, and then carrying out electric pulse treatment on the cooled intermediate piece.
  6. 6. The method of claim 1, wherein the post-treatment is: And performing the electric pulse treatment for the first time, then performing the annealing heat treatment on the electric pulse treatment product, cooling the annealing heat treatment product to room temperature, and performing the electric pulse treatment for the second time on the cooled intermediate piece.
  7. 7. The method according to any one of claims 4 to 6, wherein the post-treatment is performed in a cycle, wherein the number of times the cycle is performed is at least 2.
  8. 8. The method according to any one of claims 1 to 6, wherein the conditions of the electric pulse treatment satisfy: The current density is 50A/mm 2 -300A/mm 2 ; the time is 0.1s-60s; the frequency is 50Hz-1000Hz.
  9. 9. The method according to any one of claims 1 to 6, wherein the annealing heat treatment comprises: In a hydrogen atmosphere, the temperature is raised to 500-950 ℃ at a temperature rising rate of 5-15 ℃ per minute, and the temperature is kept for 10-4 h.
  10. 10. A soft magnetic alloy obtained by the production method according to any one of claims 1 to 9, wherein the soft magnetic alloy has a grain size of 5 μm to 20 μm, a yield strength of not less than 800MPa, an elongation of not less than 10%, and a coercive force of not more than 80A/m.

Description

Soft magnetic alloy and preparation method thereof Technical Field The application relates to the technical field of soft magnetic alloy, in particular to a soft magnetic alloy and a preparation method thereof. Background The soft magnetic alloy is a core material of tip equipment such as aerospace, precision motors and the like due to extremely high saturation induction intensity. However, there is a significant conflict between the toughness and the magnetic properties of the alloy. In order to obtain high strength and hardness, it is generally necessary to strengthen the soft magnetic alloy with B2 ordered phases and precipitation phases, but this tends to lead to a drastic decrease in the plasticity and toughness of the soft magnetic alloy. To improve the plasticity and magnetic properties of the soft magnetic alloy, only conventional high-temperature annealing or solution treatment can be performed, which in turn can lead to coarse grains and significantly reduced strength of the soft magnetic alloy. Therefore, the prior art is difficult to lead the soft magnetic alloy to achieve the balance of strength, plasticity and magnetic property, and further severely restricts the application of the soft magnetic alloy in the scene with higher performance requirements. It should be noted that the foregoing is not necessarily prior art, and is not intended to limit the scope of the present application. Disclosure of Invention Embodiments of the present application provide a soft magnetic alloy and a method of manufacturing the same to solve or alleviate one or more of the technical problems set forth above. According to a first aspect of an embodiment of the present application, there is provided a method for producing a soft magnetic alloy, comprising the steps of: Providing a soft magnetic alloy blank, wherein the soft magnetic alloy blank comprises 49% -51% by mass of cobalt element, 0.8% -1.8% by mass of vanadium element, not more than 0.04% by mass of carbon element, not more than 0.3% by mass of manganese element, not more than 0.3% by mass of silicon element, not more than 0.02% by mass of phosphorus element, not more than 0.02% by mass of sulfur element, not more than 0.02% by mass of copper element, not more than 0.05% by mass of nickel element, and the balance of iron element and unavoidable impurities; performing plastic deformation treatment on the soft magnetic alloy blank to obtain a plastic deformation piece; and carrying out post-treatment on the plastic deformation piece, wherein the post-treatment comprises at least one electric pulse treatment and at least one annealing heat treatment so as to obtain the soft magnetic alloy. According to the preparation method provided by the embodiment of the application, the soft magnetic alloy blank is subjected to plastic deformation, at least one electric pulse treatment and at least one annealing heat treatment, and the two energy fields are synergistic, so that the yield strength and the elongation of the soft magnetic alloy are obviously improved, the coercive force of the soft magnetic alloy is effectively reduced, and finally the soft magnetic alloy has excellent strength, excellent toughness and excellent magnetism. The method has higher process efficiency and energy conservation, and is characterized in that the electric pulse treatment can concentrate energy on the material body, the action time is shorter, and the annealing heat treatment time can be shortened. The current in the electric pulse treatment process can promote the dislocation movement and annihilation of the material, and the electric pulse treatment process can precisely control the recrystallization degree, the grain size and the second phase precipitation behavior by combining with the thermal diffusion effect of the annealing heat treatment, so that a fine and uniform ideal structure is obtained, and the soft magnetic alloy shows higher strength, higher plasticity and lower coercivity. According to the embodiment of the application, the plastic deformation treatment mode comprises warm rolling, and before the warm rolling, the soft magnetic alloy blank is subjected to heat preservation at 600-800 ℃ for 10-60 min, wherein the rolling reduction rate of the warm rolling is 55% -75%. Thus, the obtained soft magnetic alloy is further promoted to have higher strength, higher plasticity and lower coercivity. According to an embodiment of the application, the plastic deformation treatment mode comprises cold rolling, wherein the cold rolling process comprises the step of carrying out cold rolling on the soft magnetic alloy blank at room temperature, and the rolling reduction rate of the cold rolling is 50% -85%. Thus, the obtained soft magnetic alloy is further promoted to have higher strength, higher plasticity and lower coercivity. According to the embodiment of the application, the post-treatment is that the electric pulse treatment is firstly carried out, and then the annealing heat