Melt control self-generation aluminum-based composite material preparation method

An aluminum-based composite material, self-generated technology, applied in the field of composite materials, can solve problems such as sedimentation and segregation

Active Publication Date: 2018-03-13
ALUMICS MATERIALS INSTIUTUTE ANHUI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defects in the prior art, the purpose of the present invention is to provide a method for preparing a melt-controlled self-generated aluminum-based composite material to solve the problem of aluminum-based composite material TiB 2 The size and distribution of the reinforcing phase can be controlled and the problems of sedimentation and segregation

Method used

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Examples

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preparation example Construction

[0024] An embodiment of the present invention provides a method for preparing a melt-controlled self-generated aluminum-based composite material, including the following steps:

[0025] Melt the pure aluminum or aluminum alloy substrate at a temperature range of 700-760°C, keep it warm for 20 minutes and homogenize it, add reaction salts and reaction aids, blow argon with rotation and stir, and react;

[0026] After the reaction is completed, remove the salt slag, carry out refining treatment, and then cast it.

[0027] The preparation method also includes adding 1-2wt% magnesium into the melt after melting the matrix.

[0028] The reaction aid includes Na with a mass ratio of 2:1:1 to 4:1:1 3 AlF 6 、LiF 3 , LiCl 3 .

[0029] The reaction salt includes NaBF with a mass ratio of 1:1 to 2:1 4 and Na 2 TiF 6 .

[0030] The added amount of the reaction auxiliary agent is 5-15wt% of the reaction salt.

[0031] The flow rate of the argon gas is 5-15 L / min, and the stirring...

Embodiment 1

[0038] In this example, pure aluminum is used as the base material, 1wt% magnesium is added to the melt, and NaBF with a mass ratio of 1:1 4 and Na 2 TiF 6 As a reaction mixture salt supplemented with Na 3 AlF 6 、LiF 3 , LiCl 3 As a reaction auxiliary agent, the ratio is 2:1:1, the total mass of the reaction auxiliary agent is 10% of the reaction mixed salt, the reaction auxiliary agent is added at a temperature of 760 ° C, and the reaction time is 30 minutes; rotating and blowing argon to stir, The rotor speed is 300r / min, the argon gas flow rate is 10L / min; the pulse magnetic field intensity is controlled at 1.5T, and the high-energy ultrasonic field intensity is controlled at 200W / m 2 , to prepare TiB with a mass percentage of 14wt% 2 In situ reinforcement of pure aluminum composites. As-cast mechanical properties of the material: σ b =180Mpa; σ 0.2 = 112Mpa; δ = 7.8%; E = 88.7Gpa.

Embodiment 2

[0040] In this example, ZL101 is used as the base material, 2wt% magnesium is added to the melt, and NaBF with a mass ratio of 1.5:1 4 and Na 2 TiF 6 As a reaction mixture salt supplemented with Na 3 AlF 6 、LiF 3 , LiCl3 As a reaction aid, the ratio is 3:1:1, and the total mass of the reaction aid is 15% of the reaction mixed salt; the reaction aid is added at a temperature of 720°C, and the reaction time is 20 minutes; rotating and blowing argon to stir, The rotor speed is 250r / min, the argon gas flow rate is 5L / min; the pulse magnetic field intensity is controlled at 2.5T, and the high-energy ultrasonic field intensity is controlled at 500W / m 2 , to prepare TiB with a mass percentage of 10wt% 2 / ZL101 composite material. As-cast mechanical properties of the material: σ b =265Mpa; σ 0.2 =213Mpa; δ=2.8%; E=83.2Gpa.

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Abstract

The invention provides a melt control self-generation aluminum-based composite material preparation method, which comprises: melting pure aluminum or an aluminum alloy matrix, adding a reaction salt and a reaction auxiliary agent, blowing argon, stirring, and carrying out a reaction; and removing the salt residue after completing the reaction, carrying out refining treatment, and casting so as toobtain the product. According to the present invention, with the preparation method, the problems of the size control and the distribution control of the TiB2 reinforced phase of the aluminum-based composite material, settlement segregation and the like can be solved; and the aluminum-based composite material with the characteristics of the TiB2 particle content of up to 15% wt, uniform structureand excellent performances are prepared, and the basis is provided for the further expansion and application of the preparation of the particle reinforced composite materials through the mixed salt reactions.

Description

technical field [0001] The invention belongs to the field of composite materials, and relates to a method for preparing an aluminum-based composite material, in particular to a method for preparing a melt-controlled self-generated aluminum-based composite material. Background technique [0002] In recent years, many articles have reported the research on in situ authigenic particle reinforced aluminum matrix composites. Its characteristics are: the reinforcement particles are synthesized in situ inside the matrix, the matrix interface is well bonded and the interface is clean; the size of the in situ reinforcement particles is small (generally <3.0μm) and evenly distributed in the matrix; by selecting the reaction type and controlling the reaction parameters, Different types and different quantities of in-situ reinforced particles can be obtained; the in-situ synthesis of reinforced particles is combined with casting technology; the process is simple and the cost is low; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C21/00C22C32/00
CPCC22C1/1036C22C21/00C22C32/0073
Inventor 李险峰王浩伟马乃恒陈东张亦杰夏存娟
Owner ALUMICS MATERIALS INSTIUTUTE ANHUI CO LTD
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