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A kind of preparation method and product of multilevel layered gradient material

A gradient material and layered technology, applied in the field of preparation of multi-level layered gradient materials, can solve the problems of limited strength/toughness matching optimization effect, inability to apply thicker materials, etc., and achieve excellent strength-toughness matching and low cost. Effect

Active Publication Date: 2020-12-29
CHONGQING UNIV
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Problems solved by technology

[0005] However, the existing surface gradient processing methods can only prepare gradient structures within a certain depth range on the surface of metal materials, and cannot be applied to thicker materials.
However, the existing layered materials generally only have a layered structure, and the optimization effect on the strength / toughness matching is very limited.
In addition, existing heterogeneous materials often have only one heterogeneous structure, such as gradient or layered

Method used

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  • A kind of preparation method and product of multilevel layered gradient material
  • A kind of preparation method and product of multilevel layered gradient material
  • A kind of preparation method and product of multilevel layered gradient material

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Embodiment

[0028] A preparation method of a multi-level layered gradient material, comprising the following steps: 1) selecting pure titanium and pure zirconium two metals, the preparation flow chart of which is as follows figure 1 shown. Zirconium and titanium can be dissolved infinitely, and the stable phase of the formed solid solution is a body-centered cubic structure at high temperature, while the stable phase at room temperature or lower temperature is a close-packed hexagonal structure. The allotropic phase transition temperature is related to the solid solution composition, and the phase transition temperature ranges from 605°C to 882°C; 2) Surface treatment is carried out for the selected metal materials (pure titanium and pure zirconium) to obtain a clean sample surface. These surface-treated metal materials were cut into matching sizes (100 mm long x 25 mm wide x 0.5 mm thick in this example), and stacked alternately (6 pieces of pure titanium and 5 pieces of pure zirconium)....

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Abstract

The invention discloses a preparation method of a multilevel layered gradient material and a product of the multilevel layered gradient material, and belongs to the field of metal materials. Based onthe basic principle of gradient distribution of phase transition temperature caused by component gradient, the multilevel layered gradient material is prepared by a traditional diffusion composite andphase change heat treatment process with low cost and scale production. The preparation method comprise following steps that (1) at least two metal materials which can be solidly soluble with each other indefinitely, and the formed solid solution has the characteristics of homoatomic isomerous phase transition; (2) the metal materials are stacked alternately, diffusion composition is implemented,and a layered gradient material is obtained; and (3) at least primary phase change heat treatment for the layered gradient material is conducted, and multilevel layered gradient material is prepared.The multilevel layered gradient material prepared by the preparation method has both layered and gradient heterogeneous structures, and excellent strength / toughness matching can be achieved.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a preparation method of a multi-level layered gradient material and a product thereof. Background technique [0002] For thousands of years, improving the strength of materials has been an important research direction in the field of materials. The strength of metal materials can be significantly improved within a certain range by alloying, work hardening, and microstructure refinement. However, when these traditional methods increase the strength of metal materials, the plasticity / toughness of metal materials will generally be significantly reduced, thereby deteriorating the processing and preparation performance of metal materials, and also reducing the service safety of metal materials. Therefore, developing a method to synergistically improve the strength and plasticity / toughness of metal materials, or to increase the strength without significantly reducing the pla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18
CPCC22F1/183C22F1/186
Inventor 何维均马佳腾杨艳刘庆
Owner CHONGQING UNIV
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