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Aluminum alloy guide wire material resistant to medium-temperature creep and preparation method thereof

An aluminum alloy wire and alloy technology, applied in conductive materials, conductive materials, metal/alloy conductors, etc., can solve the problems of affecting the mechanical properties of materials, affecting the interaction between the second phase and dislocation, affecting the interface stability, etc. The effect of enhancing mechanical properties, excellent resistance to medium temperature creep, and improving resistance to medium temperature creep

Active Publication Date: 2019-10-18
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Al for single and multi-spherical shells 3 (Zr,Sc / Lu) nanophase, spherical shells with different shapes have different interface structures, which not only affects the stability of the interface, but also affects the interaction between the second phase and dislocations, thereby affecting the mechanical properties of the material

Method used

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  • Aluminum alloy guide wire material resistant to medium-temperature creep and preparation method thereof
  • Aluminum alloy guide wire material resistant to medium-temperature creep and preparation method thereof
  • Aluminum alloy guide wire material resistant to medium-temperature creep and preparation method thereof

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preparation example Construction

[0052] A method for preparing an aluminum alloy wire material, the composition of the aluminum alloy wire material is as described above, comprising the steps of:

[0053] 1) batching: batching is carried out according to the composition of the aluminum alloy wire material;

[0054] 2) Melting the prepared materials to obtain an alloy melt;

[0055] 3) casting the alloy melt in a mold, and cooling to obtain an ingot;

[0056] 4) The ingot is extruded and drawn into a wire, and the extrusion temperature is 475°C to 510°C. After drawing, the wire is subjected to solid solution, pre-deformation and graded aging heat treatment to obtain an aluminum alloy wire material resistant to medium temperature creep.

[0057] In some examples of the preparation method, the melting temperature is 740-770°C.

[0058] In some examples of preparation methods, the solid solution temperature is 620-640°C.

[0059] Through pre-deformation, especially through the deformation of multiple passes of...

Embodiment 1

[0064] 1) Zr: 0.2wt%, Sc: 0.1wt%, Lu: 0.05wt%, and the balance is Al according to the weight percentage of the constituent elements;

[0065] 2) Melting the above materials at a high temperature in a melting furnace at a temperature of 760°C until melting, pouring the alloy melt into a mold and stirring, cooling to obtain an ingot;

[0066] 3) The ingot is extruded and drawn into a wire, the extrusion temperature is 480°C, and the wire is solid-soluted (640°C / 8h) and pre-deformed (3.5%) after drawing;

[0067] 4) Multi-stage aging heat treatment: 325°C / 8h+375°C / 36h+425°C / 8h.

Embodiment 2

[0069] 1) Zr: 0.16wt%, Sc: 0.08wt%, Lu: 0.04wt%, and the balance is Al according to the weight percentage of the constituent elements;

[0070] 2) Melting the above materials at a high temperature in a melting furnace at a temperature of 750°C until melting, pouring the alloy melt into a mold and stirring, cooling to obtain an ingot;

[0071] 3) The ingot is extruded and drawn into a wire, the extrusion temperature is 470°C, and the wire is subjected to solid solution (640°C / 8h) and pre-deformation (3.5%) after drawing;

[0072] 4) Multi-stage aging heat treatment: 325°C / 10h+375°C / 24h+425°C / 10h.

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Abstract

The invention discloses an aluminum alloy guide wire material resistant to medium-temperature creep and a preparation method thereof. Elements Sc and Lu which achieve the creep resisting effect are added on the basis of an Al-Zr-series aluminum alloy guide wire. The prepared guide wire has excellent medium-temperature creep resistance, and further has relatively high electrical conductivity and tensile strength.

Description

technical field [0001] The invention relates to an aluminum alloy wire material and a preparation method thereof, in particular to an aluminum alloy wire material resistant to medium temperature creep and a preparation method thereof. Background technique [0002] Al-Zr alloy wire has high service temperature (70MPa / 90℃~150℃) and high carrying capacity, and has good capacity expansion, creep resistance and heat resistance. It is mainly used in high latitude and cold regions, such as Russia, Japan, Canada and other countries. Al-Zr alloy cables of United Aluminum Corporation of Russia account for about 80% of the Russian market share. In Russia's existing transmission lines, replacing conventional transmission lines with Al-Zr alloy wires can double the power transmission capacity. However, due to the diffusion hysteresis of Zr, the creep performance at the service temperature is poor, and the Al in the Al-Zr alloy 3 Zr precipitates cannot pin dislocations and grain boundar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/02C22F1/04H01B1/02
CPCC22C1/026C22C21/00C22F1/04H01B1/023
Inventor 王斌张嘉艺易丹青阳文锋艾卫民杨磊刘淼
Owner CENT SOUTH UNIV