A method for preparing non-equilibrium ultrafine microstructure alloys by using high-energy beams

Abstract

The invention provides a method for preparing non-equilibrium superfine structure alloy by using high-energy beam, which belongs to the technical field of metal material preparation and processing. The technological process of the method includes: high energy beam surface remelting, remelting layer stress relief separation and remelting layer stabilization compounding. Through high-energy beam surface remelting, a remelted layer with supersaturated alloying elements and ultrafine grains is prepared on the surface of the alloy. Through the stress-relief separation of the remelted layer, the multi-layers, which can be ultra-fine structures of different compositions and ultra-high solid solubility, are stress-relieved and laminated. Through the stabilization and compounding of the remelting layer, the metallurgical fusion between the multi-layer materials is finally formed, so that the multi-layer materials form a whole material, thereby preparing ultra-light cemented carbide, strong functional degradable zinc alloy, high-strength composite materials, high-strength super A variety of high-performance materials with non-equilibrium ultra-fine structures such as light porous materials.

Description

Technical field [0001] The present invention belongs to the field of preparation of metal processing technology, particularly relates to a process for preparing a non-equilibrium high-energy beam use ultra fine grain alloy. Background technique [0002] With the continuous development of its alloys are widely used in various industries, people on the alloy properties are also increasing. Decision structure of the alloy properties, e.g., grain refinement can significantly improve the yield strength of the alloy. [0003] Grain refining methods include liquid and solid refinement refinement. The method comprises adding refined liquid nucleating agents, broken dendrite and improve solidification speed. Wherein, although the addition of nucleating agents can play a significant heterogeneous nucleation effect, but will change the chemical composition of the starting alloy, may result in reduced performance of certain alloys. Broken dendrite is not much effect on improving the solid so...

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Problems solved by technology

[0006] Aiming at the problems existing in the existing alloy grain refinement methods, such as thin thickness, difficulty in ultra-refinement of the second phase and matrix at the same time, and solid solubility of alloying elements limited by the maximum equilibrium solid solubility, the present invention provides a The method of using high-energy beams to prepare non-equilibrium ultra-fine structure alloys, through high-energy beam surface remelting, a remelting layer with supersaturated alloying elements and ultrafine grains is prepared on the surface of the alloy; through the remelting layer, the stress is separated, Relieve stress and superimpose multi-layer remelted layers with ultra-fine structure and ultra-high solid solubility of different components; stabilize and recombine through remelted layers, and finally form metallurgical fusion between multi-layer materials, so that multi-layer materials Form a material as a whole, so as to prepare a variety of high-performance materials with non-equilibrium ultra-fine structures, such as ultra-light cemented carbide, strong functional degradable zinc alloy, high-strength composite materials, high-strength ultra-light porous materials, etc.

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