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CN-122007821-A - Non-uniform layered pure titanium plate and preparation method thereof

CN122007821ACN 122007821 ACN122007821 ACN 122007821ACN-122007821-A

Abstract

The invention belongs to the field of titanium plate processing, and particularly discloses a non-uniform layered pure titanium plate and a preparation method thereof. The method comprises the following steps of S1, carrying out multi-layer compounding through explosion welding after cleaning treatment on the surface of a multi-layer titanium plate to obtain an explosion welding plate, S2, carrying out cold processing treatment on the explosion welding plate to obtain a cold processing plate blank, and S3, carrying out heat treatment on the cold processing plate blank to obtain the non-uniform layered pure titanium plate. The method can solve the problems that the yield strength of the titanium alloy prepared by the traditional method is low and the practical use of the titanium alloy is limited, and can avoid instability when the non-uniform lamellar structure is prepared by asynchronous rolling.

Inventors

  • CHENG XIAOWEI
  • XIAO QIANG
  • LI XIAOYU
  • XUE HAN

Assignees

  • 成都先进金属材料产业技术研究院股份有限公司

Dates

Publication Date
20260512
Application Date
20260324

Claims (10)

  1. 1. A method for preparing a non-uniform layered pure titanium plate, comprising the steps of: S1, carrying out multi-layer compounding through explosive welding after cleaning the surfaces of the multi-layer titanium plates to obtain explosive welding plates; s2, carrying out cold working treatment on the explosion welding plate to obtain a cold working plate blank; And S3, carrying out heat treatment on the cold-working plate blank to obtain the non-uniform layered pure titanium plate.
  2. 2. The method for producing a non-uniform layered pure titanium sheet according to claim 1, wherein in step S1, the original titanium sheet thickness is not more than 1mm.
  3. 3. The method for preparing a non-uniform layered pure titanium plate according to claim 1, wherein in the step S1, the detonation mode of explosion welding adopts millisecond delay detonation, the detonation point is located at the midpoint of the long side of the titanium plate, and the detonation voltage is 24-36V.
  4. 4. The method for producing a non-uniform layered pure titanium sheet according to claim 1, wherein in step S1, the thickness of the explosive used for the explosion welding is 20 to 28mm, the explosive used for the explosion welding has an explosive power of 7 to 9, and the detonation velocity of the explosive used for the explosion welding is 2000 to 2500m/S.
  5. 5. The method for producing a non-uniform layered pure titanium sheet according to claim 1, wherein in step S1, the explosive used for explosion welding is an explosive in which a powdery emulsion explosive and an inert additive are mixed.
  6. 6. The method for producing a non-uniform layered pure titanium sheet according to claim 1, wherein in step S1, the surface cleaning treatment includes at least one of mechanical polishing, acid washing.
  7. 7. The method for producing a non-uniform layered pure titanium sheet according to claim 1, wherein in step S2, the cold working treatment includes any one of cold rolling, cold pressing, cold forging.
  8. 8. The method for producing a non-uniform layered pure titanium sheet according to claim 1, wherein in step S2, the deformation amount of the cold working treatment is 40% -80%.
  9. 9. The method for producing a non-uniform layered pure titanium sheet according to claim 1, wherein in step S3, the heat treatment temperature is 300 ℃ to 600 ℃ and the heat treatment time is 30 to 120min.
  10. 10. A non-uniform layered pure titanium sheet, characterized in that it is produced by the method according to any one of the preceding claims 1-9.

Description

Non-uniform layered pure titanium plate and preparation method thereof Technical Field The invention belongs to the field of titanium plate processing, and particularly relates to a non-uniform layered pure titanium plate and a preparation method thereof. Background The titanium alloy has the advantages of strong corrosion resistance, excellent heat resistance, good biocompatibility, high specific strength and specific density and the like, and is widely applied to the fields of aerospace, ships, human medical devices and the like. However, for titanium alloys with lower alloy content, the yield strength is lower, only about 200MPa, so that the development of the titanium alloy is greatly limited. The yield strength after cold rolling was increased to about 600MPa, but the elongation was almost 0. At present, a learner prepares a non-uniform layered titanium alloy by an asynchronous rolling and short-time annealing method, and the elongation is hardly reduced while the strength is greatly improved. However, the asynchronous rolling process and the subsequent annealing process are extremely difficult to control, and the non-uniform lamellar structure has low yield. Disclosure of Invention The invention aims to provide a method for preparing a non-uniform layered titanium alloy by an explosion welding method, which aims to solve the problems that the yield strength of the titanium alloy prepared by the traditional method is low and the practical use of the titanium alloy is limited, and simultaneously avoid instability when the non-uniform layered structure is prepared by asynchronous rolling. In order to achieve the above purpose, the present invention adopts the following technical scheme: according to a first aspect of the present invention, there is provided a method of preparing a non-uniform layered pure titanium sheet, comprising the steps of: S1, carrying out multi-layer compounding through explosive welding after cleaning the surfaces of the multi-layer titanium plates to obtain explosive welding plates; s2, carrying out cold working treatment on the explosion welding plate to obtain a cold working plate blank; And S3, carrying out heat treatment on the cold-working plate blank to obtain the non-uniform layered pure titanium plate. As a further embodiment, in step S1, the original titanium plate thickness is not more than 1mm. In a further embodiment, in step S1, the detonation mode of the explosion welding adopts millisecond delay detonation, the detonation point is located at the midpoint of the long side of the titanium plate, and the detonation voltage is 24-36V. As a further embodiment, in step S1, the explosive thickness used for the explosion welding is 20-28 mm. As a further embodiment, in step S1, the explosive used for the explosion welding has an explosive size of 7-9. As a further embodiment, in the step S1, the detonation velocity of the explosive used for the explosion welding is 2000-2500 m/S. As a further embodiment, in step S1, the explosive used for explosion welding is an explosive prepared by mixing a powdery emulsion explosive and an inert additive. As a further embodiment, in step S1, the surface cleaning treatment includes at least one of mechanical polishing and pickling. As a further embodiment, in step S2, the cold working treatment includes any one of cold rolling, cold pressing, and cold forging. As a further embodiment, in step S2, the deformation amount of the cold working treatment is 40% -80%. As a further embodiment, in step S3, the heat treatment temperature is 300-600 ℃ and the heat treatment time is 30-120min. According to a second aspect of the present invention, there is provided a non-uniform layered pure titanium sheet produced by the above method. By adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects: according to the scheme, a plurality of layers of titanium plates are subjected to explosive cladding, the obtained plate is provided with a layered and gradient non-uniform structure along the thickness direction, then, an explosive welding plate is processed into a required size in a cold processing mode, and finally, the structure with self-similar characteristics of the non-uniform layered structure from a mesoscale to a microscale is obtained through heat treatment. The non-uniform lamellar structure can provide coordinated deformation for the whole sample, so that back stress reinforcement is introduced, and meanwhile, the reasonable grain size distribution and layer thickness distribution can also obtain a size effect and a gradient effect, so that higher strength is obtained under the condition of ensuring the plasticity of the material. The combination of back stress reinforcement, size effect reinforcement and gradient effect reinforcement enables the method of the invention to achieve better strength and plasticity matching than other methods. Drawings In order to more clearly illustrate the t