Method for preparing nanophase containing aluminum-magnesium-silicon alloy wire

A nano-phase, silicon alloy technology, used in metal/alloy conductors, cable/conductor manufacturing, conductive materials, etc., can solve the problem of increasing the electron relaxation time, and cannot further improve the strength and conductivity of aluminum-magnesium-silicon alloy wires. , electron scattering, etc.

Active Publication Date: 2016-05-11
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The scientific principle of solid solution strengthening is: a large number of atoms diffuse into the aluminum matrix lattice, causing lattice distortion, which directly affects the dislocation movement during deformation, increases the resistance of dislocation movement, and thus improves the Al-Mg- The strength of the silicon alloy, but this lattice distortion will lead to a decrease in the conductivity of the aluminum-magnesium-silicon alloy, because the lattice distortion will cause electron scattering and increase the relaxation time of the electrons, thereby increasing the resistivity of the material
Technical defect: the use of solid solution strengthening in the production process of aluminum-magnesium-silicon alloy wire cannot break the restriction relationship between the strength and conductivity of aluminum-magnesium-silicon alloy wire, and cannot further improve the strength of aluminum-magnesium-silicon alloy wire and conductivity
Since solid solution strengthening leads to the mutual restriction of strength and conductivity of Al-Mg-Si alloy wires, it has become a technical obstacle to further improve the strength and conductivity of Al-Mg-Si alloy wires

Method used

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  • Method for preparing nanophase containing aluminum-magnesium-silicon alloy wire
  • Method for preparing nanophase containing aluminum-magnesium-silicon alloy wire
  • Method for preparing nanophase containing aluminum-magnesium-silicon alloy wire

Examples

Experimental program
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Effect test

Embodiment 1

[0071] A method for preparing an aluminum-magnesium-silicon alloy wire containing a nanophase, specifically comprising the following steps:

[0072] Step 1, alloy melting:

[0073] (1) Take the ingredients according to the composition of 6201 aluminum alloy;

[0074] (2) Using an intermediate frequency induction furnace, place the aluminum ingot in the crucible, raise the temperature of the furnace to 730°C, after the aluminum ingot is melted, wrap other alloy elements with aluminum foil and put them into the aluminum liquid, add 1% of the alloy mass Ti was used as a grain refiner, and the temperature was kept for 30 minutes, and N with a purity of 99.9% was used 2 Degassing to obtain 6201 aluminum alloy liquid;

[0075] Step 2, casting:

[0076] A 6201 aluminum alloy round bar with a diameter of 100 mm and a length of 6 m was produced by using a vertical round bar continuous casting machine;

[0077] Sampling and analysis of its chemical composition, 6201 aluminum alloy, ...

Embodiment 1 and comparative example 6201

[0104] Table 2 Example 1 and the tensile strength and conductivity test results of the 6201 alloy wire of comparative example

[0105]

[0106]

[0107] It can be seen that the strength and electrical conductivity of the 6201 aluminum alloy wire of this embodiment have been significantly improved, especially, compared with the comparative example, its electrical conductivity has been increased by 6.7% IACS. At the same time, the tensile strength increased by 10 MPa.

[0108] In summary, the preparation method of Example 1 can precipitate alloy atoms such as magnesium and silicon uniformly solid-dissolved in the aluminum matrix in the form of nano phases. The preparation method of Example 1 is based on the second phase precipitation strengthening theory, which changes the strengthening idea of ​​the traditional process, adjusts the microstructure of the aluminum-magnesium-silicon alloy wire through solution treatment + aging heat treatment, and realizes that alloy atoms s...

Embodiment 2

[0114] A method for preparing an aluminum-magnesium-silicon alloy wire containing a nanophase, specifically comprising the following steps:

[0115] Step 1, alloy melting:

[0116] (1) Weigh the ingredients according to the 6101 aluminum alloy composition commonly used in the selection of overhead wires;

[0117] (2) Using an intermediate frequency induction furnace, place the aluminum ingot in the crucible, raise the temperature of the furnace to 720°C, after the aluminum ingot is melted, wrap other alloy elements with aluminum foil and put them into the aluminum liquid, add 1% of the alloy mass Ti was used as a grain refiner, and the temperature was kept for 30 minutes, and N with a purity of 99.9% was used 2 Degassing to obtain 6101 aluminum alloy liquid;

[0118] Step 2, casting:

[0119] A 6101 aluminum alloy round bar with a diameter of 100 mm and a length of 6 m was produced by using a vertical round bar continuous casting machine;

[0120] Sampling and analysis of ...

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Abstract

The invention discloses a method for preparing a nanophase containing aluminum-magnesium-silicon alloy wire, and belongs to the technical field of alloy materials. The method comprises the steps that an aluminum-magnesium-silicon alloy bar is rolled after solution treatment; and artificial aging heat treatment is carried out, heat treatment is carried out after wire drawing, and the finished product is obtained. According to solution treatment, gradient temperature rise is carried out within the range of 400 DEG C to 500 DEG C, heat preservation is carried out for 3-15 minutes at each gradient, solution treatment is carried out at the temperature of 500 DEG C to 580 DEG C, heat preservation is carried out for 0.5-8.0 hours, and cold water quenching is immediately carried out. According to aging treatment, theoretical calculation is carried out, the size range of nano precipitated phase particles is determined, gradient temperature rise is carried out within the range of 100 DEG C to 160 DEG C, and heat preservation is carried out for 5-10 minutes at each gradient; and artificial aging heat treatment is carried out within the range of 160 DEG C to 190 DEG C, heat preservation is carried out for 0.5-6 hours, and cold water quenching is immediately carried out. The strength and conductivity of the nanophase containing aluminum-magnesium-silicon alloy wire are synchronously improved. Energy consumption is remarkably reduced, and meanwhile reliability is improved. Solution treatment and aging treatment are combined, operation is easy, and a newly-added technological link is low in cost and remarkable in effect.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, in particular to a method for preparing aluminum-magnesium-silicon alloy wires containing nano phases. Background technique [0002] With the rapid growth of my country's economic scale, the demand for energy is becoming more and more vigorous, and the environmental problems brought about by energy consumption are becoming increasingly prominent. Therefore, realizing "energy saving and emission reduction" has become a very difficult task facing the whole society. According to the "Twelfth Five-Year Plan for Energy Conservation and Emission Reduction" issued by the State Council in August 2013, it is clearly stated that the comprehensive line loss rate of the power grid in 2015 will decrease by 0.23 percentage points compared with 2010 to reach 6.3%, which will be used as a binding index for energy conservation in the national power industry. [0003] The overhead transmission w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/047H01B13/00H01B1/02
CPCC22F1/047H01B1/023H01B13/00
Inventor 王强侯嘉鹏张哲峰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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