High-conductivity heat-resistant Al-Zr-Er alloy wire material and preparation method thereof

A technology of alloy wire and high conductivity, which is applied in the field of aluminum alloys, can solve problems such as difficult control of heat treatment and preparation process, unsuitable for mass promotion and application, complex ingot preparation process, etc., and achieves low solid solubility and improved Effect of precipitation driving force, improvement of strength and heat resistance

Active Publication Date: 2020-06-30
CHINALCO MATERIALS APPL RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned patented alloys often add multi-component rare earth elements Er, Y, etc. and noble metal elements Sc, the ingot preparation process is complicated, the heat treatment and preparation process is difficult to control, and the cost of the alloy is high, which is not suitable for industrialization and mass application.

Method used

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  • High-conductivity heat-resistant Al-Zr-Er alloy wire material and preparation method thereof
  • High-conductivity heat-resistant Al-Zr-Er alloy wire material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Using industrial pure aluminum ingots with a purity greater than 99.7% (of which Fe≤0.15%, Si≤0.05%) as raw materials, first put industrial pure aluminum into a melting furnace to melt, the alloy liquid is kept at 750°C, and the aluminum-boron intermediate alloy is added for boron processing. After the boridation treatment, let it stand still and convert the aluminum water into a converter, then add aluminum-zirconium master alloy and aluminum-erbium master alloy for alloying, and its composition and weight percentage are: Zr 0.05%; Er 0.1%; B 0.02%; Fe 0.128 %; Si 0.032%; (V+Ti+Cr+Mn) 0.01%; aluminum is the balance. After the master alloy is melted, the alloy melt is lowered to 730°C for heat preservation, followed by stirring, refining, slag removal and standing, and the casting temperature is 690°C. The heat-resistant aluminum alloy conductor material was obtained by continuous casting and rolling, and the cooling rate of the ingot was 10°C / s. The rolling temperatu...

Embodiment 2

[0041] Using industrial pure aluminum ingots with a purity greater than 99.7% (with Fe ≤ 0.15%, Si ≤ 0.05%) as raw materials, first put industrial pure aluminum into a furnace to melt, keep the alloy liquid at 760°C, and add aluminum-boron intermediate alloy for boron processing. After the boridation treatment, let it stand still and convert the aluminum water into a converter, then add aluminum-zirconium master alloy and aluminum-erbium master alloy for alloying, and its composition and weight percentage are: Zr 0.08%; Er 0.1%; B 0.038%; Fe 0.13 %; Si 0.038%; (V+Ti+Cr+Mn) 0.008%; aluminum is the balance. After the master alloy is melted, the alloy melt is lowered to 730°C for heat preservation, followed by stirring, refining, slag removal, and standing, and the casting temperature is 720°C. The heat-resistant aluminum alloy conductor material was obtained by continuous casting and rolling, and the cooling rate of the ingot was 10°C / s. The rolling temperature of the casting ...

Embodiment 3

[0043] Using industrial pure aluminum ingots with a purity greater than 99.7% (with Fe ≤ 0.15%, Si ≤ 0.05%) as raw materials, first put industrial pure aluminum into a furnace to melt, keep the alloy liquid at 755°C, and add aluminum-boron intermediate alloy for boron processing. After the boridation treatment, let it stand still and convert the aluminum water into a converter, then add aluminum-zirconium master alloy and aluminum-erbium master alloy for alloying, and its composition and weight percentage are: Zr 0.05%; Er 0.15%; B 0.032%; Fe 0.125 %; Si 0.04%; (V+Ti+Cr+Mn) 0.005%; aluminum is the balance. After the master alloy is melted, the alloy melt is lowered to 730°C for heat preservation, followed by stirring, refining, slag removal, and standing, and the casting temperature is 700°C. The heat-resistant aluminum alloy conductor material was obtained by continuous casting and rolling, and the cooling rate of the ingot was 10°C / s. The rolling temperature of the slab is...

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Abstract

The invention provides a high-conductivity heat-resistant Al-Zr-Er alloy wire material. The alloy comprises the following components of, by mass, 0.02%-0.15% of Zr, 0.01%-0.2% of Er, 0.01%-0.04% of B,less than or equal to 0.20% of Fe, less than or equal to 0.05% of Si, less than or equal to 0.01% of (V+Ti+Cr+Mn) and the balance Al. According to the high-conductivity heat-resistant Al-Zr-Er alloywire material, the trace rare earth element Er is added while the element Zr is added into the alloy so as to modify the alloy and to optimize and adjust the content of the alloy elements, so that themechanical property of the alloy is guaranteed, and the electric conductivity is improved; and the electric conductivity of the prepared heat-resistant aluminum alloy monofilament material is largerthan or equal to 61.5% IACS, the tensile strength is larger than or equal to 160 MPa, the elongation rate is larger than 3.5%, the heat-resistant temperature is greater than or equal to 150 DEG C, andthe strength residual rate after heating at 230 DEG C for 1 hour is greater than 90%.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to a heat-resistant Al-Zr-Er alloy wire material with high electrical conductivity and a preparation method thereof. Background technique [0002] The heat-resistant aluminum alloy wire is a special expansion wire with good performance. Using large-capacity heat-resistant aluminum alloy wire to carry out the expansion and transformation of the existing line, under the principle of not replacing the pole tower as much as possible, it can not only improve the transmission capacity of the line, but also reduce The overall cost of the project. At present, the conductivity of existing heat-resistant aluminum alloy wires with a heat-resistant temperature of 150°C is only 60% IACS, which is difficult to meet the needs of long-distance, large-capacity transmission line construction projects and power grid expansion and reconstruction projects. With the rapid development...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03C22C1/06C22F1/04H01B1/02
CPCC22C1/026C22C1/03C22C1/06C22C21/00C22F1/04H01B1/023
Inventor 肖翔郑志凯吴浩杨中玉周泽宇李红英
Owner CHINALCO MATERIALS APPL RES INST CO LTD
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