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

A semi-solid, tough metal technology, applied in the direction of metal material coating process, coating, etc., can solve the problems of difficult to obtain high density, difficult to prepare semi-solid slurry, complex shape and other problems in additive manufacturing technology, and achieve good popularization and application Prospect, broad versatility and practicality, excellent performance results

Pending Publication Date: 2020-07-31
GUANGZHOU INST OF RAILWAY TECH
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  • Abstract
  • Description
  • Claims
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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 to...

Method used

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

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Embodiment 1

[0044] The embodiment of the present invention provides a high-strength and tough metal material and its laser semi-solid processing preparation method, which overcomes the "single structure", "quality defect", "anisotropy", " Thermal stress" and other common basic problems, while improving the comprehensive mechanical properties of metal parts.

[0045] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present inv...

Embodiment 2

[0059] see figure 2 , another embodiment of a method for preparing a high-strength and tough metal material by laser semi-solid processing, including:

[0060] Step 1. Spray the specified Ti-6Al-4V atomized spherical powder from the nozzle through the powder feeder and spread it on the titanium alloy substrate so that it can be melted by the laser thermal effect to form a cladding layer;

[0061] In this example, in order to make the Ti-6Al-4V metal powder more optimal for laser semi-solid additive manufacturing of multi-scale composite structure metal parts, the metal powder is uniformly screened with a 200-mesh steel sieve.

[0062] Step 2. Through the first continuous laser beam, the Ti-6Al-4V metal powder sprayed by the powder feeder onto the titanium alloy substrate is thermally melted to form a cladding layer, and the temperature of the cladding layer is obtained in real time through a thermocouple temperature measuring device;

[0063] In order to monitor the primary ...

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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...

Claims

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Application Information

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IPC IPC(8): C23C24/10C21D10/00
CPCC23C24/10C21D10/005
Inventor 康利梅
Owner GUANGZHOU INST OF RAILWAY TECH
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