Preparation method of light, high-strength and high-energy-absorption composite material

A composite material, high-strength technology, applied in additive processing, additive manufacturing, etc., can solve the problems of discontinuous reinforcement phase, damage, interface cracking, etc., and achieve the effect of simple preparation process, broad application prospects, and high tensile strength.

Pending Publication Date: 2022-07-29
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Description
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  • Application Information

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Problems solved by technology

Therefore, the stress platform that generally does not have high energy absorption characteristics, its effective energy absorption occurs before yielding or critical load, and the lower effective energy absorption strain often cannot produce ideal energy absorption efficiency
For composite materials, the currently developed compounding methods often result in uniform dispersion and discontinuity of the reinforcing phase, thereby reducing its strengthening efficiency, and at the same time making the stress transfer uneven, prone to stress concentration, leading to interface cracking or local damage between the two phases , thereby reducing the impact resistance of the material

Method used

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  • Preparation method of light, high-strength and high-energy-absorption composite material
  • Preparation method of light, high-strength and high-energy-absorption composite material
  • Preparation method of light, high-strength and high-energy-absorption composite material

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preparation example Construction

[0037] In the specific implementation process, the present invention provides a method for preparing a lightweight, high-strength, high-energy-absorbing composite material, and the specific operation steps are as follows:

[0038]Step 1: Use SolidWorks software to design the mesh of the bionic structure. Import the designed graphic files into Magics software for graphic error correction and optimization.

[0039] Step 2: Use Arcam A1 electron beam melting equipment to print to prepare the alloy porous material skeleton, the electron beam scanning speed is 100~3000mm / s (preferably 100~200mm / s), and the electron beam current is 1~15mA (preferably 1.0~2.0mA). The prepared alloy porous material has a skeleton porosity of 50-95% (preferably a porosity of 60-80%, and must comply with the principle of topology optimization), a pore size of 300-3000 μm (preferably 300-600 μm), and a density of 2.0-5.0 g / cm 3 (preferably 2.0 to 3.5 g / cm 3 ).

[0040] Step 3: Under the conditions o...

Embodiment 1

[0049] In this example, the Ti-24Nb-4Zr-8Sn (wt.%) (Ti2448) alloy powder is used as the raw material, and the SolidWorks software is used to design the porous structure, such as figure 1 shown. And use Arcam A1 electron beam melting equipment to manufacture, choose electron beam scanning speed to be 150mm / s, electron beam current to be 1.5mA. After preparing the sample as Figure 2.a As shown, the sample has a porosity of 80%, a pore size of 500 μm and a density of 2.8 g / cm 3 . The Ti2448 porous material encapsulated in a vacuum tube was subjected to a two-step heat treatment: under the condition of 800 °C, the temperature was kept for 1 hour, and then cooled to room temperature at a rate of 5 °C / min; Cool to room temperature at a rate of ℃ / min to obtain a titanium alloy porous material skeleton.

[0050] The titanium alloy porous material skeleton is subjected to surface modification treatment. The modifier used is a silane coupling agent. The treatment time is 24 hours, ...

Embodiment 2

[0055] In this example, the Ti-5Al-5Mo-5V-3Cr-1Fe (wt.%) (Ti55531) alloy powder is used as the raw material, and the SolidWorks software is used to design the porous structure, such as Figure 5.a shown. And use Arcam A1 electron beam melting equipment to manufacture, choose electron beam scanning speed to be 180mm / s, electron beam current is 1.7mA. The printing void ratio is 60%, the pore size is 300μm, and the density is 3.1g / cm 3 . The Ti55531 porous material encapsulated in a vacuum tube was subjected to two-step heat treatment: under the condition of 850 °C, the temperature was kept for 1 hour, and then cooled to room temperature at a rate of 5 °C / min; Cool to room temperature at a rate of °C / min.

[0056] The surface modification treatment of the titanium alloy porous material skeleton is carried out. The modifier used is a silane coupling agent, and the treatment time is 28 hours. It is taken out and dried. The silane coupling agent acts on the surface of the alloy p...

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Abstract

The invention relates to the field of composite material preparation, in particular to a preparation method of a light, high-strength and high-energy-absorption composite material, which is suitable for preparing a titanium alloy-polyurea composite material with a three-dimensional interpenetrating characteristic. The method comprises the following steps: preparing an alloy porous material; modifying the surface of the alloy porous material; infiltrating polyurea into the alloy porous material, and carrying out heat treatment; the composite material is formed by compounding a titanium alloy porous material and a polyurea reinforced phase, wherein the porosity of the titanium alloy porous material is 60-80%, and the titanium alloy porous material and the polyurea reinforced phase are printed through an additive manufacturing technology; the two groups of phases are communicated with each other and interspersed in a three-dimensional space; when the density is 2.0-3.5 g/cm < 3 >, the tensile strength of the composite material reaches 200MPa, the compressive strength reaches 600MPa, the recoverable strain reaches 25%, and the absorption energy reaches 50KJ/cm < 3 >. The method is simple in process step and low in production cost, and has good application prospects in the fields of national defense, aerospace, automobiles, energy and the like.

Description

Technical field: [0001] The invention relates to the field of composite material preparation, in particular to a preparation method of a lightweight, high-strength, high-energy-absorbing composite material, which is suitable for preparing a titanium alloy porous material-polyurea composite material with three-dimensional interpenetration characteristics. Background technique: [0002] Porous titanium and titanium alloy materials are widely used due to their advantages of small specific gravity, good energy absorption, large specific surface area, and good corrosion resistance. in medical, aerospace and other fields. [0003] Porous materials have many advantages, especially small specific gravity, high strength, and good energy absorption, which can exert their characteristics in many aspects, but porous materials still have shortcomings. For example, in order to achieve the same protection ability, a single porous material needs to be used in combination with a panel, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/02C08K9/06C08K7/24B22F10/28B22F10/38B22F10/64B22F10/62B33Y10/00B33Y40/20
CPCC08K9/06C08K7/24B22F10/28B22F10/38B22F10/64B22F10/62B33Y10/00B33Y40/20C08L75/02
Inventor 李述军路程乾刘增乾郝玉琳张哲峰侯文韬杨锐
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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