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High-conductivity heat-resistant aluminum alloy sensitive to low resistance temperature and preparation technique and application thereof

A preparation process and aluminum alloy technology, which is applied in the field of high-conductivity and heat-resistant aluminum alloys, can solve the problems that do not involve high-temperature conductivity, do not grasp the law of conductivity change, and are difficult to apply.

Active Publication Date: 2018-01-09
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventor has made many beneficial attempts in the development of high-conductivity and heat-resistant aluminum alloy wires in the early stage. For example, patent CN201610177708.3 discloses a light-weight high-conductivity and heat-resistant aluminum wire with iron added. The aluminum wire is mainly composed of Al, Composed of B

Method used

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  • High-conductivity heat-resistant aluminum alloy sensitive to low resistance temperature and preparation technique and application thereof
  • High-conductivity heat-resistant aluminum alloy sensitive to low resistance temperature and preparation technique and application thereof
  • High-conductivity heat-resistant aluminum alloy sensitive to low resistance temperature and preparation technique and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The mass percentage of each element after the composition adjustment is: zirconium is 0.10%, hafnium is 0.03%, ytterbium is 0.20%, iron is 0.11%, and the balance is Al and unavoidable impurity elements. After 8 hours, the temperature was raised to 400°C for 48 hours to obtain an aluminum alloy billet, and the measured comprehensive properties are shown in Table 1.

[0047] Table 1 Example 1 comprehensive performance evaluation table

[0048]

Embodiment 2

[0050] The mass percentage of each element after composition adjustment is: zirconium is 0.05%, hafnium is 0.02%, ytterbium is 0.20%, iron is 0.11%, and the balance is Al and unavoidable impurity elements. After rapid cooling and casting, keep it at 250°C After 8 hours, the temperature was raised to 450°C for 24 hours to obtain an aluminum alloy billet, and the measured comprehensive properties are shown in Table 2.

[0051] Table 2 Example 2 comprehensive performance evaluation table

[0052]

Embodiment 3

[0054] The mass percentage of each element after composition adjustment is: zirconium is 0.05%, hafnium is 0.01%, ytterbium is 0.10%, iron is 0.11%, and the balance is Al and unavoidable impurity elements. After rapid cooling and casting, it is kept at 250°C After 8 hours, the temperature was raised to 450°C for 24 hours to obtain an aluminum alloy billet, and the measured comprehensive properties are shown in Table 3.

[0055] Table 3 Example 3 comprehensive performance evaluation table

[0056]

[0057]

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PUM

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Abstract

The invention discloses a high-conductivity heat-resistant aluminum conductor sensitive to a low resistance temperature and a preparation technique and application thereof, and belongs to the technical field of novel electrical materials. The conductor is mainly prepared from Al, Fe, Zr, Hf, Yb and inevitable impurity elements, raw materials of the high-conductivity heat-resistant aluminum conductor include industrial pure aluminum with the purity of 99.70% and an intermediate alloy containing corresponding alloy elements, the raw materials are smelted, refined and cast, and then heat treatment is conducted on the raw materials, so that a corresponding aluminum alloy blank is obtained. The electric conductivity of the obtained alloy blank is 60% higher than the IACS at the temperature of 20 DEG C, is 40% higher than the IACS at the temperature of 150 DEG C and is 36% higher than the IACS at the temperature of 200 DEG C, and the tensile strength of the alloy blank is 70 MPa or over. After the obtained aluminum alloy blank deforms by 80%, the long-time (400 h) heat-resistant temperature of the aluminum alloy blank is not lower than 200 DEG C, and the short-time (1 h) heat-resistant temperature of the aluminum alloy blank is not lower than 250 DEG C. An obtained aluminum alloy can be applied to at least one of guide rods, buses and wires.

Description

technical field [0001] The invention relates to a low-resistance, temperature-sensitive, high-conductivity, heat-resistant aluminum alloy that has undergone composite microalloying and composite heat treatment, as well as its preparation process and application, and belongs to the technical field of new electrical materials. Background technique [0002] Aluminum has good electrical conductivity and is widely used as a conductor material in transmission lines, substations, aluminum electrolysis, construction and other fields. Although pure aluminum has high electrical conductivity, its strength is not high and its heat resistance is poor. Microalloying can improve its heat resistance and strength, but it will have a very adverse effect on its electrical conductivity. [0003] During the process of carrying current, the conductor will generate heat due to the ohmic effect, which will cause the temperature of the conductor to rise, resulting in a decrease in its strength and c...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/03C22F1/04C25C3/12
Inventor 李红英赵守鑫
Owner CENT SOUTH UNIV