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Continuous semisolid extrusion forming method for preparing high-strength aluminum alloy lead

An aluminum alloy wire, semi-solid extrusion technology, used in metal/alloy conductors, cable/conductor manufacturing, electrical components, etc., can solve the problems of low conductivity, unsatisfactory performance, low strength, etc., to improve mechanical properties and The effect of electrical conductivity, excellent product quality and high processing efficiency

Inactive Publication Date: 2014-11-12
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the performance of domestic aluminum alloy wires is not ideal, and the following problems need to be solved: ①The mechanical properties and electrical conductivity of aluminum alloy wires are often not well balanced
Al-Mg-Si alloy wire has high strength (300MPa), but low conductivity (52.5-55.0%IACS), while Al-Zr alloy wire has high equivalent conductivity (up to 60%IACS), but its strength is lower Low (225-245MPa)
② The production process is relatively simple: smelting and purification of aluminum alloy - continuous casting and rolling of aluminum alloy rod - solid solution treatment of aluminum alloy rod - quenching - stretching of aluminum alloy wire rod - stranding into cable

Method used

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  • Continuous semisolid extrusion forming method for preparing high-strength aluminum alloy lead
  • Continuous semisolid extrusion forming method for preparing high-strength aluminum alloy lead
  • Continuous semisolid extrusion forming method for preparing high-strength aluminum alloy lead

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The first step is to design and melt the Al-Zr-Sc-Er alloy, based on high-purity aluminum (purity greater than 99.9%). After the high-purity aluminum is heated and melted in a heating furnace, it will melt to Al-Zr, Al-Sc, Al-Er intermediate alloys are added to the high-purity aluminum melt. The mass fraction of each component in the alloy is: Zr 0.01%, Sc 0.10%, Er 1.00%, and the balance is Al. The impurity content is less than 0.03%. After adding the master alloy, the melt is stirred and kept at 700°C for 20 minutes.

[0030] In the second step, when the temperature of the alloy liquid is 700 °C, 1% of the mass fraction of the melt is added to the alloy melt. 2 Cl 6 Carry out deslagging and degassing, the melt is allowed to stand at 700°C for 20 minutes, then the slag is removed, and argon gas is introduced into the melting furnace for refining for 30 minutes, the pressure is 1MPa, and the flow rate is 2L / min.

[0031] In the third step, the refined alloy melt is in...

Embodiment 2

[0035] The first step is to prepare and melt Al-Zr-Sc-Er alloy. After heating and melting pure aluminum with a purity greater than 99.9% in a heating furnace, add Al to the molten high-purity aluminum melt at a temperature of 720°C -Zr, Al-Sc, Al-Er master alloy, the mass fraction of each component in the alloy is: Zr 2.00%, Sc 0.01%, Er 0.01%, the balance is Al, the impurity content is less than 0.03%, add the intermediate After alloying, the melt was stirred and kept at 700°C for 20 minutes.

[0036] In the second step, when the temperature of the alloy liquid is 700 °C, 1% of the mass fraction of the melt is added to the alloy melt. 2 Cl 6 Carry out deslagging and degassing, the melt is allowed to stand at 700°C for 20 minutes, then the slag is removed, and argon gas is introduced into the melting furnace for refining for 30 minutes, the pressure is 1MPa, and the flow rate is 2L / min.

[0037] In the third step, the refined alloy melt is introduced into the tundish at 700°...

Embodiment 3

[0041] The first step is to prepare and melt Al-Zr-Sc-Er alloy. After heating and melting pure aluminum with a purity greater than 99.9% in a heating furnace, add Al to the molten high-purity aluminum melt at a temperature of 720°C -Zr, Al-Sc, Al-Er master alloys, the mass fraction of each component in the alloy is: Zr 1.00%, Sc 2.00%, Er 1.50%, the balance is Al, the impurity content is less than 0.03%, add the middle After alloying, the melt was stirred and kept at 700°C for 20 minutes.

[0042] In the second step, when the temperature of the alloy liquid is 700 °C, 1% of the mass fraction of the melt is added to the alloy melt. 2 Cl 6 Carry out deslagging and degassing, the melt is left standing at 700°C for 20 minutes, then the slag is removed, and argon gas is introduced into the melting furnace for refining for 30 minutes, the pressure is 1.1 MPa, and the flow rate is 1.8 L / min.

[0043] In the third step, the refined alloy melt is introduced into the tundish at 700°C ...

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Abstract

The invention discloses a continuous semisolid extrusion forming method for preparing a high-strength aluminum alloy lead. The method comprises the steps as follows: 1, preparing and melting Al-Zr-Sc-Er alloy; 2, adding a deslagging agent to the alloy melt when the alloy liquid is at 700 DEG C so as to deslag and degas; standing the melt at 700 DEG C for 20 minutes, and then slagging off; pouring nitrogen into a melting furnace for refining for 30 minutes along with pressure of 1 to 1.515MPa and flow rate of 1 to 4L / min; 3, transferring the refined alloy melt into a tundish for preserving heat at 700 DEG C; 4, pouring the molten alloy from the tundish into a vibrating cooling inclination plate at 670 to 700 DEG C, wherein the molten alloy is formed to be semisolid metal size after passing the vibrating cooling inclination plate; and 5, pouring the prepared semisolid metal size into a continuous semisolid extruding machine, thus obtaining the high-strength aluminum alloy lead with diameter of 2 to 15mm. The continuous semisolid extrusion forming method disclosed by the invention has the advantages of being short in process, energy-saving and environment-friendly, high in processing efficiency, high in product quality, and easy to achieve industrialization.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal processing, and in particular relates to a continuous semi-solid extrusion forming method for preparing high-strength aluminum alloy wires. Background technique [0002] Electricity plays a fundamental and strategic role in the national economy. my country is a big power country, but the power equipment manufacturing industry is not commensurate with it. As the carrier of power transmission, overhead transmission wire occupies an extremely important position in the transmission line. With the rapid development of the national economy, the demand for electric power has risen sharply, especially the implementation of the strategy of western development and the strategic adjustment of national electric power development, the continuous extension of the Three Gorges transmission line, the west-to-east power transmission, north-south interconnection, and national networking , The transmissio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B1/02
Inventor 管仁国左良赵占勇钞润泽赵红亮胡芳友
Owner NORTHEASTERN UNIV LIAONING