Laser semi-solid processing preparation method of high-strength high-toughness metal material, high-strength high-toughness metal material, and application thereof

Abstract

The invention belongs to the technical field of metal materials, and particularly relates to a laser semi-solid processing preparation method of a high-strength high-toughness metal material, the high-strength high-toughness metal material, and application thereof. The preparation method comprises the steps of (1) hot-cladding a three-dimensional (3D) forming metal piece layer by layer through a first beam of continuous laser, and acquiring the temperature of a cladding layer in real time; (2) when the temperature of the cladding layer is reduced to be within a semi-solid state area formed bya primary solid phase, carrying out mechanical disturbance on the semi-solid-state cladding layer through a shock wave effect of a second beam of short-pulse laser; and (3) circularly acting on the cladding layer layer by layer, and then cooling naturally until 3D forming a dual-scale / multi-scale composite structure metal component. According to the laser semi-solid processing preparation method of the high-strength high-toughness metal material, the high-strength high-toughness metal material, and the application thereof provided by the invention, the metal material with novel composite microstructures such as dual-scale / multi-scale structures of nano-grain, ultra-fine grain and fine grain and an excellent combination property is obtained, and can be widely applied to the fields such as high speed railway, space flight and aviation, military industry and instruments and apparatus, and the effective control on macroscopical deformation and cracking problems of metal pieces is realized.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and more specifically relates to a laser semi-solid processing preparation method of high-strength and tough metal materials, high-strength and tough metal materials and applications thereof. Background technique [0002] As a new type of material preparation and processing technology, laser technology has been developed by a A special-purpose processing technology has developed into a more general-purpose processing technology with multiple uses. Among them, laser preparation and surface strengthening technologies that are easy to automate, such as 3D printing based on laser thermal effects and laser shock wave mechanical effects, and impact strengthening, are widely used. [0003] 3D printing technology based on laser thermal effect has the characteristics of complex forming structure and high forming precision. It is one of the most promising application technologies for one-time inte...

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Problems solved by technology

[0006] In order to overcome the above-mentioned defects in the prior art, the present invention provides a laser semi-solid processing and preparation method of high-strength and tough metal materials, which can be prepared into large-sized, complex-shaped, microstructures including nanocrystals, ultra-fine crystals, Fine-grained dual-scale, multi-scale, gradient structure high-strength and tough metal materials and their parts overcome the difficulty of preparing semi-solid slurry and obtaining nanocrystals, ultra-fine grains, fine grains, dual-scale or multi-scale by traditional semi-solid processing technology Structure, additive manufacturing technology is difficult to obtain high density, no quality defects, no residual stress, multi-scale structural block materials and other issues

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