High-conductivity creep-resistant aluminium alloy cable conductor containing Hf and Ce and preparation method thereof

A cable conductor, high electrical conductivity technology, applied in the field of aluminum alloy materials, can solve the problems of poor high temperature resistance and creep performance, low electrical conductivity, strength loss, etc., to improve electrical performance and high temperature performance, improve heat resistance. and creep resistance, improve the effect of safety performance

Active Publication Date: 2012-10-31
CENT SOUTH UNIV +1
View PDF10 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The price of copper wire is more expensive, more than three times that of aluminum
Although the elongation rate of the soft pure aluminum conductor is much higher than that of the hard state, its tensile strength is greatly reduced, and its creep resistance is very poor. Potential safety hazards during use
Despite the rapid development of aluminum alloy cables, as wires for construction, there are various problems in the existing aluminum alloy cables: Al-Mg-Si series alloy wires are due to Mg 2 The precipitation strengthening effect of Si phase has high room temperature strength, but due to the 2 Si is not a stable phase at high temperature, the strength loss is serious at high temperature, and the high temperature resistance and creep performance are poor; Al-Zr series alloy wires have good heat resistance Al 3 Zr phase, so high temperature performance and creep resistance are good, but the electrical conductivity is low, only 58% IACS, although the electrical conductivity of the Al-Zr-Y series alloy wire with rare earth addition reaches 60% IACS, but with the steel core aluminum strand Compared with the electrical conductivity of 61% IACS of electric power aluminum in the wire, there is still a gap

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-conductivity creep-resistant aluminium alloy cable conductor containing Hf and Ce and preparation method thereof
  • High-conductivity creep-resistant aluminium alloy cable conductor containing Hf and Ce and preparation method thereof
  • High-conductivity creep-resistant aluminium alloy cable conductor containing Hf and Ce and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Put pure aluminum with a mass fraction of 99.99% into the cupola, melt it into aluminum water at 750°C and keep it warm at 700°C, add sodium chloride as a covering agent, and then put in aluminum-iron master alloy, aluminum-copper master alloy, aluminum - Hafnium master alloy, aluminum-boron master alloy and aluminum-cerium master alloy, made into aluminum alloy liquid, adding hexachloroethane as a refining agent, stirring, slag removal, pouring in a mold from 715°C to 150°C, each element The content is (mass fraction): Fe 1.1%, Cu 0.1%, Ce 0.02%, Hf 0.01%, B 0.01%, and the rest is Al. After homogenization treatment at 500°C / 15h, it is cooled to 380°C with the furnace, and extruded in an extrusion die with a mold temperature of 300°C. The extrusion speed is 5m / min, and the extrusion ratio is 25:1. Drawing at a speed of 1 min, annealing at 250°C for 2 hours, and air cooling after taking out the furnace.

Embodiment 2

[0043] Put pure aluminum with a mass fraction of 99.99% into the cupola, melt it into aluminum water at 900°C and keep it warm at 750°C, add a mixed salt of sodium chloride, potassium chloride, calcium fluoride, and sodium carbonate (the mass ratio is 30 :30:25:15) As a covering agent, put in aluminum-iron master alloy, aluminum-copper master alloy, aluminum-hafnium master alloy, aluminum-boron master alloy and aluminum-cerium master alloy in turn to make aluminum alloy liquid, add Hexachloroethane is used as a refining agent, stirred and slag removed, poured in a mold from 725°C to 200°C, the content of each element is (mass fraction): Fe 0.3%, Cu 0.5%, Ce 0.1%, B 0.05%, Hf 0.2%, the rest is Al. After homogenization treatment at 550°C / 10h, it is cooled to 420°C with the furnace, and extruded in an extrusion die with a mold temperature of 420°C. The extrusion speed is 20m / min, and the extrusion ratio is 64:1. Min speed for drawing, annealing at 350 ° C for 1 h, air cooling ou...

Embodiment 3

[0045] Put pure aluminum with a mass fraction of 99.99% into the cupola, melt it into aluminum water at 850°C and keep it warm at 730°C, add a mixed salt of sodium chloride and potassium chloride (mass ratio 1:1) as a covering agent, Add aluminum-iron master alloy, aluminum-copper master alloy, aluminum-hafnium master alloy, aluminum-boron master alloy and aluminum-cerium master alloy in turn to make aluminum alloy liquid, add hexachloroethane as refining agent, stir, grill Slag, in the mold poured from 720°C to 180°C, the content of each element is (mass fraction): Fe 0.75%, Cu 0.25%, Ce 0.05%, B 0.03%, Hf 0.1%, and the rest is Al. After homogenization treatment at 530°C / 12h, it is cooled to 400°C with the furnace, and extruded in an extrusion die with a mold temperature of 400°C. The extrusion speed is 15m / min, and the extrusion ratio is 36:1. Min speed for drawing, annealing at 320 ° C for 1.5 h, air cooling out of the furnace.

[0046] The product performance index that e...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a high-conductivity creep-resistant aluminium alloy cable conductor containing Hf and Ce and a preparation method thereof. The aluminium alloy cable conductor disclosed by the invention is composed of the following constituents in percentage by mass: 0.3-1.1% of Fe, 0.1-0.5% of Cu, 0.01-0.2% of Hf, 0.01-0.05% of B, 0.02-0.1%, and the balance of Al. The preparation method comprises the following steps of: proportioning according to the designed alloy constituents, smelting and pouring, homogenizing-annealing and hot-extruding, cold-drawing and annealing to finally obtain the aluminium alloy cable conductor. The aluminium alloy cable conductor prepared by the preparation method disclosed by the invention has an elongation after fracture being greater than 25%, tensile strength being greater than 110 MPa, and conductivity being 61.0-62.5%. By using the conductor manufactured by the preparation method disclosed by the invention, transmission capacity can be increased and electric energy loss can be reduced due to the introduction of other alloy elements; and moreover, many high-temperature stable phases are distributed on the crystal boundaries and in the crystals of alloys, so that the high-temperature performance and the creep-resistant performance of the alloy conductor can be improved, thus guaranteeing the service life and safety of the conductor.

Description

technical field [0001] The invention discloses a high-conductivity creep-resistant aluminum alloy cable conductor containing Hf and Ce and a preparation method thereof, belonging to the technical field of aluminum alloy materials. Background technique [0002] Aluminum alloy has the advantages of high specific strength, high electrical conductivity, good plasticity, good wear resistance and corrosion resistance, so it has an advantageous position in the field of power transmission. With the development of my country's economy and the improvement of people's living standards, the electricity consumption of residents continues to increase. During the use of wires, the contact points are caused by internal stress due to the instantaneous high temperature (150°C) generated by the connection, and the wires undergo short-term creep. , Under frequent creep action, accidents such as failure of conductor materials and burning of insulating materials outside the conductor will occur. T...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01B1/02H01B13/00C22C21/00C22C21/12C22C1/03C22C1/06C22F1/04C22F1/057
Inventor 易丹青臧冰王斌柳公器刘欢郭磊马凯
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap