A preparation method of multi-level structure tungsten particle reinforced aluminum matrix composite material

A particle-reinforced aluminum and composite material technology, used in metal processing equipment, coating, transportation and packaging, etc., can solve the problem of inability to obtain dense tungsten particle-reinforced aluminum matrix composite materials, limit the application of composite materials, and affect the strength of composite materials. and other problems, to achieve the effect of realizing large-scale industrial application production, improving interface bonding and improving interface bonding force

Active Publication Date: 2018-06-15
GRIMAT ENG INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Due to the large difference between the melting point and density of aluminum and tungsten (the melting point of tungsten is 3422°C, the density is 19.35g / cm 3 ; The melting point of aluminum is 660°C, the boiling point is 2467°C, and the density is 2.7g / cm 3 ), conventional metal matrix composites preparation methods, such as stirred casting and melting casting, cannot obtain dense tungsten particle reinforced aluminum matrix composites, and these methods are not suitable for materials with large differences in matrix and reinforced phase densities
Patent CN105401001A proposes to use powder metallurgy to prepare tungsten particle-reinforced aluminum-based composite materials. The strength of the composite material is high, but due to the dispersion of the reinforcing phase in the matrix, the plasticity of the composite material is poor, and the poor bonding of the Al-W interface also affects the composite material. The strength of the material limits the further application of composite materials

Method used

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  • A preparation method of multi-level structure tungsten particle reinforced aluminum matrix composite material
  • A preparation method of multi-level structure tungsten particle reinforced aluminum matrix composite material
  • A preparation method of multi-level structure tungsten particle reinforced aluminum matrix composite material

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Embodiment 1

[0026] In this embodiment, the multi-level structure tungsten particle reinforced aluminum matrix composite material is composed of 50% tungsten and 50% aluminum matrix in mass percentage, and the preparation method steps of the tungsten particle reinforced aluminum matrix composite material are as follows:

[0027] (1) Weigh 400g of tungsten powder, 200g of aluminum powder, and 3kg of stainless steel grinding balls, and use a planetary ball mill in an argon-protected environment to carry out ball milling at a speed of 400 rpm for 8 hours to obtain Al Coated W particle cluster composite powder;

[0028] (2) Weigh 750g of Al-coated W particle cluster composite powder and 250g of aluminum powder in step (1), and use a double-cone mixer to mix the materials under the protection of argon, and the weight ratio of the grinding ball to the powder is The ratio is 1:1, and the mixing time is 8h to obtain a composite powder;

[0029] (3) Put the composite powder in step (2) in the pref...

Embodiment 2

[0033] The steps are the same as in Example 1, except that the quality of the tungsten powder in step (1) is 480g, and that of the aluminum powder is 120g.

[0034] The density of the obtained composite material is 99.9%, the tensile strength at room temperature is 315MPa, the bending strength at room temperature is 476MPa, the yield strength at room temperature is 205MPa, and the elongation is 6%.

Embodiment 3

[0036] The procedure is the same as in Example 1, except that the weight of the Al-coated W particle cluster composite powder weighed is 700 g, and the weight of the aluminum powder is 300 g.

[0037] The hot isostatic pressing temperature was changed from 520°C to 550°C.

[0038] The density of the obtained composite material is 99.7%, the tensile strength at room temperature is 310MPa, the bending strength at room temperature is 520MPa, the yield strength at room temperature is 200MPa, and the elongation is 6%.

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Abstract

The invention belongs to the technical field of preparation of multi-level structure tungsten particle reinforced aluminum matrix composite material, and in particular relates to a preparation method of multilevel structure tungsten particle reinforced aluminum matrix composite material. The present invention utilizes the technology of high-energy ball milling-low-energy mixing-hot isostatic pressing to prepare multi-level structure tungsten particle reinforced aluminum matrix composite material. The composite material uses Al as the matrix and Al-W aggregates as the reinforcing phase to form a cluster structure. The matrix material between the clusters has a large deformation zone, which improves the dispersion distribution of the tungsten-reinforced phase in the previous Al-W composite materials. This phenomenon improves the plasticity of the composite material, improves the interfacial bonding of Al-W, and the rough surface of the cluster also improves the interfacial bonding force between the cluster and the matrix, and improves the comprehensive performance of the composite material. The composite material has the advantages of high density, high strength, good plasticity and high service temperature. It is a lightweight high-strength composite material with great application potential.

Description

technical field [0001] The invention belongs to the technical field of preparation of multi-level structure tungsten particle reinforced aluminum matrix composite material, and in particular relates to a preparation method of multilevel structure tungsten particle reinforced aluminum matrix composite material. Background technique [0002] Particle-reinforced aluminum-based composites have the advantages of both the matrix and the reinforcing phase. They have the advantages of high specific strength and elastic modulus, good electrical and thermal conductivity, and low density. They are widely used in the fields of aviation, aerospace, automobiles, and electronics. Wide range of applications. Metal tungsten has the advantages of high melting point, high hardness, and stable chemical properties. Compared with the ceramic reinforcement phase, it has good electrical conductivity and compatibility with the matrix. Tungsten particle-reinforced aluminum-based composite material i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/04C22C21/00C22C27/04B22F1/02B22F3/15
CPCC22C1/0416C22C1/045C22C21/00C22C27/04B22F3/15B22F2998/10B22F1/17B22F1/0003
Inventor 王健杨剑王军锋梁秋实苟醒陈隆辉马书旺杨志民
Owner GRIMAT ENG INST CO LTD
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