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Preparation method of calcium-hexaboride-reinforced aluminum matrix composite

An aluminum-based composite material, calcium hexaboride technology, applied in the field of preparation of aluminum-based composite materials, can solve the problems of low mechanical properties of boron-containing aluminum alloys, complicated preparation process, and many control parameters, etc., to achieve a suitable large-scale Large-scale production and application, simple preparation process and high production efficiency

Active Publication Date: 2013-07-24
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength of pure aluminum conductors often does not meet the requirements, so it is necessary to improve the strength of aluminum conductors without reducing its conductivity through heat treatment, deformation processing, and particle reinforcement, and it is also a hot research topic now.
As we all know, heat treatment or deformation processing can improve the strength of aluminum conductors, but it often causes the conductivity of aluminum conductors to decrease, and the process is complicated, time-consuming and labor-intensive.
The Chinese patent No. 99104364.2 discloses a manufacturing technology of a high-conductivity boron-containing aluminum alloy, but the mechanical properties of the boron-containing aluminum alloy prepared by it are not very high, and the preparation process is complicated; the Chinese patent No. 02137138, A method for manufacturing non-heat-treated high-conductivity heat-resistant aluminum alloy wire is disclosed, but the mechanical properties of the aluminum alloy wire prepared by this method are poor, and there are many parameters to be controlled in the preparation process, and the process is complicated

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) First prepare raw materials according to the following mass percentages: 96.8% aluminum-boron master alloy and 3.2% pure calcium (99.1% purity), wherein the boron content (wt%) in the aluminum-boron master alloy used is 2.00 ;

[0018] (2) The aluminum-boron intermediate alloy is melted and heated to 900°C, then pure calcium is added, kept warm and mechanically stirred evenly, and then directly poured into ingots; the mechanical stirring time is 5 minutes.

[0019] The composition of the calcium hexaboride reinforced aluminum matrix composite material is:

[0020] Component Content (wt%)

[0021] Aluminum (Al) 94.87

[0022] Boron (B) 1.94

[0023] Calcium (Ca) 3.19

Embodiment 2

[0025] (1) First prepare raw materials according to the following mass percentages: 95.3% aluminum-boron master alloy and 4.7% pure calcium (purity 99.5%), wherein the boron content (wt%) in the aluminum-boron master alloy used is 3.00 ;

[0026] (2) The aluminum-boron intermediate alloy is melted and heated to 1300°C, then pure calcium is added, kept warm and mechanically stirred evenly, and then directly poured into ingots; the mechanical stirring time is 15 minutes.

[0027] The composition of the calcium hexaboride reinforced aluminum matrix composite material is:

[0028] Component Content (wt%)

[0029] Aluminum (Al) 92.42

[0030] Boron (B) 2.86

[0031] Calcium (Ca) 4.72

Embodiment 3

[0033] (1) First prepare raw materials according to the following mass percentages: 91.0% aluminum-boron master alloy and 9.0% pure calcium (99.9% purity), wherein the boron content (wt%) in the aluminum-boron master alloy used is 6.00% ;

[0034] (2) The aluminum-boron intermediate alloy is melted and heated to 1100°C, then pure calcium is added, kept warm and mechanically stirred evenly, and then directly poured into ingots; the mechanical stirring time is 20 minutes.

[0035] The composition of the calcium hexaboride reinforced aluminum matrix composite material is:

[0036] Component Content (wt%)

[0037] Aluminum (Al) 85.53

[0038] Boron (B) 5.46

[0039] Calcium (Ca) 9.01.

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Abstract

The invention belongs to the field of metal materials, and relates to a preparation method of a calcium-hexaboride-reinforced aluminum matrix composite. According to the preparation method, aluminum-boron intermediate alloy and pure calcium are used as the source of boron and calcium. The preparation method comprises the following steps of: firstly, smelting the aluminum-boron intermediate alloy in a smelting furnace, rising the temperature to 900-1300 DEG C, then adding pure calcium, insulating, carrying out mechanical agitation uniformly, and pouring directly to be ingot. The preparation method of the calcium-hexaboride-reinforced aluminum matrix composite is simple in process and low in cost. The prepared calcium-hexaboride-reinforced aluminum matrix composite has the advantages of low resistivity, low linear thermal expansion coefficient, high hardness, and the like.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to a calcium hexaboride (CaB 6 ) A method for preparing a reinforced aluminum matrix composite. Background technique [0002] Aluminum conductor is one of the important basic materials in electrical industry. The conductivity of the aluminum conductor is 61% of that of the copper conductor (according to the international tempered copper standard "IACS" with a conductivity of 100% IACS), and its strength is 39% of that of the copper conductor. The weight of an aluminum conductor is only 30% of the weight of a copper conductor of the same volume, so the ratio of conductivity to weight and the ratio of strength to weight of an aluminum conductor are better than that of a copper conductor of the same weight. Under the same comprehensive performance conditions of electrical conductivity and strength, aluminum can be obtained with a lighter weight than copper. In addition, aluminum also ...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/03
Inventor 武玉英崔晓丽刘相法
Owner SHANDONG UNIV
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