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High-elongation and high-modulus TiB2 particle reinforced aluminum-based composite material and preparation method thereof

A particle-reinforced aluminum, high elongation technology, applied in the fields of forging, designing aluminum matrix composite material preparation and hot extrusion, and rolling, can solve the problems of reducing the plasticity of composite materials, difficulty in casting large-size ingots, and reducing specific surface area, etc. Achieve high elongation and good practical value

Pending Publication Date: 2022-02-11
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing research on particle-reinforced composite materials can greatly improve the strength and wear resistance, but the plasticity is sharply reduced
Due to the large interfacial energy of the reinforcement particles, during the solidification process of traditional casting molding, the reinforcement particles tend to develop in the direction of the reduction of the interfacial energy, that is, the particle agglomeration occurs, and the specific surface area is reduced to achieve a stable state with the lowest interfacial energy, which greatly reduces the composite. plasticity of material
Researchers at home and abroad use the method of additive manufacturing to improve the particle distribution through the rapid solidification molding process to obtain good strength and plasticity, but it is difficult to prepare large-sized ingots, and it is impossible to prepare large-sized structural materials

Method used

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  • High-elongation and high-modulus TiB2 particle reinforced aluminum-based composite material and preparation method thereof
  • High-elongation and high-modulus TiB2 particle reinforced aluminum-based composite material and preparation method thereof
  • High-elongation and high-modulus TiB2 particle reinforced aluminum-based composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1, an ultra-high-strength aluminum alloy extruded rod and its preparation method, is characterized in that, it is carried out according to the following steps:

[0025] ① The composition ratio of ultra-high-strength aluminum alloy is: 8% Zn, 1.6% Mg, 1.6% Cu, 0.1% Zr, 0.1% Sc, 6% TiB 2 (A low-cost Al-Ti-B refiner and its preparation method can be used, ZL201310136359.7) The balance is Al. According to the designed alloy composition, high-purity aluminum ingot, high-purity magnesium, high-purity zinc, Al-50% Cu, Al-4% Zr, Al-6% Sc master alloy, TiB 2 Proceed to the ingredients. Melt the high-purity aluminum ingot at 780°C, add Al-50% Cu, Al-4% Zr, Al-6% Sc, master alloy and TiB in sequence 2 After the intermediate alloy is completely melted, the melt is stirred at a constant speed, and then refined at 750°C, left to stand for 5 minutes, degassed, and slag removed, and then high-purity magnesium and high-purity zinc are added in sequence. After the metal is c...

Embodiment 2

[0028] Embodiment 2, an ultra-high-strength aluminum alloy extruded rod and its preparation method, is characterized in that, it is carried out according to the following steps:

[0029] ① The composition ratio of ultra-high strength aluminum alloy is: 10% Zn, 1.6% Mg, 1.6% Cu, 0.1% Zr, 0.1% Sc, 8% TiB 2 The balance is Al. According to the designed alloy composition, high-purity aluminum ingot, high-purity magnesium, high-purity zinc, Al-50% Cu, Al-4% Zr, Al-6% Sc master alloy, TiB 2Make the ingredients. Melt the high-purity aluminum ingot at 780 ° C, add Al-50% Cu, Al-4% Zr, Al-6% Sc master alloy, TiB in order 2 After the intermediate alloy is completely melted, the melt is stirred at a constant speed, and then refined at 750°C, left to stand for 5 minutes, degassed, and slag removed, and then high-purity magnesium and high-purity zinc are added in sequence. After the metal is completely melted, the melt is Continue stirring at a constant speed, and finally carry out semi-...

Embodiment 3

[0032] Embodiment 3, an ultra-high-strength aluminum alloy extruded rod and its preparation method, is characterized in that, it is carried out according to the following steps:

[0033] ① The composition ratio of ultra-high-strength aluminum alloy is: 11% Zn, 2.0% Mg, 1.7% Cu, 0.12% Zr, 0.12% Sc, 10% TiB 2 The balance is Al. According to the designed alloy composition, high-purity aluminum ingot, high-purity magnesium, high-purity zinc, Al-50% Cu, Al-4% Zr, Al-6% Sc master alloy, TiB 2 Make the ingredients. Melt the high-purity aluminum ingot at 780 ° C, add Al-50% Cu, Al-4% Zr, Al-6% Sc master alloy, TiB in order 2 After the intermediate alloy is completely melted, the melt is stirred at a constant speed, and then refined at 750°C, left to stand for 5 minutes, degassed, and slag removed, and then high-purity magnesium and high-purity zinc are added in sequence. After the metal is completely melted, the melt is Continue stirring at a constant speed, and finally carry out s...

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Abstract

The invention discloses a high-elongation and high-modulus TiB2 particle reinforced aluminum-based composite material and a preparation method thereof, and belongs to the technical field of preparation of aluminum-based composite materials. With Al-Zn-Mg-Cu-Zr-Sc as a matrix and TiB2 particles as a reinforcement, the preparation method comprises the following steps: (1), performing burdening according to material components, performing smelting, and obtaining phi 280-mm composite cast ingot through a semi-continuous casting technology; (2), carrying out homogenizing annealing on the cast ingot at 400 DEG C / 6h and 465 DEG C / 30h; (3), preheating the homogenized composite material at 420 DEG C for 2h, and then carrying out first-step hot forging or hot extrusion treatment; and (4), continuously preheating the composite material subjected to one-step deformation at 420 DEG C for 2 hours, and carrying out secondary thermal deformation, namely forging, extruding and rolling in the orthogonal direction to obtain the TiB2 reinforced aluminum-based composite material subjected to orthogonal composite thermal deformation. The composite material has excellent strength, ductility and elasticity modulus.

Description

technical field [0001] The present invention designs the technical field of aluminum-based composite material preparation and hot extrusion, forging, and rolling, and particularly relates to a high-elongation, high-modulus TiB 2 Preparation and deformation process of particle-reinforced ultra-high-strength aluminum matrix composites. Background technique [0002] Ultra-high-strength aluminum alloy is a heat-treatable aluminum alloy mainly based on Al-Zn-Mg-Cu system, and its yield strength is usually above 500MPa. Ultra-high-strength aluminum alloy has the characteristics of low density, good processing performance and excellent welding performance, and is widely used in aerospace, vehicles, construction, bridges, military equipment, etc. Since the advent of Al-Zn-Mg-Cu ultra-high-strength aluminum alloy, its research has mainly gone through four major processes: [0003] One is the alloying route. By increasing the Zn content in the early stage, increasing the Zn / Mg rati...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22C32/00C22C1/10C22C1/03B22D11/00C22F1/053C21D1/26B21J5/00
CPCC22C21/10C22C32/0073C22C1/1036C22C1/1094B22D11/003C22F1/053C21D1/26B21J5/002C22C1/1047
Inventor 陈子勇黄景存相志磊李继豪唐元琛申高亮
Owner BEIJING UNIV OF TECH
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