Al-Mg-Si-Cu-Pr-Nd rare earth aluminum alloy cable material and preparation method thereof

An aluminum alloy and rare earth technology, which is applied in the field of medium-strength rare earth aluminum alloy cable materials to achieve the effects of improving alloy strength, excellent electrical conductivity, and improving tensile strength and elongation.

Active Publication Date: 2017-06-13
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide the above-mentioned medium-strength Al-Mg-Si-Cu-Pr-Nd rare earth aluminum alloy material to solve the matching problem of the electrical conductivity and mechanical properties of the existing cable aluminum conductors

Method used

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  • Al-Mg-Si-Cu-Pr-Nd rare earth aluminum alloy cable material and preparation method thereof
  • Al-Mg-Si-Cu-Pr-Nd rare earth aluminum alloy cable material and preparation method thereof
  • Al-Mg-Si-Cu-Pr-Nd rare earth aluminum alloy cable material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036](1) Mg: 1.7 wt %, Si: 1.2 wt %, Cu: 2.4 wt %, Pr: 0.5 wt %, Nd: 0.6 wt %, and the balance is Al according to the weight percentage of the constituent elements. The above-mentioned materials are smelted at a high temperature in a smelting furnace at a temperature of 750 ° C until they are melted;

[0037] (2) adding a refining agent (20wt%NaCl+20wt%KCl+35wt%NaF+25wt%LiF) in a ratio of 1:100 by the mass ratio of refining agent to smelting ingredients to degas, and let stand for 10min;

[0038] (3) pour the alloy melt in the cylindrical mould in the electromagnetic stirring device, carry out low-frequency electromagnetic stirring 15Hz, the time is 30s, and then water-cooled to become an ingot;

[0039] (4) The ingot is extruded and drawn, the extrusion temperature is 470 ° C, and the diameter of the wire after drawing is 6 mm;

[0040] (5) Heat treatment (solution + aging) of the wire after drawing: 530°C / 10h+165°C / 6h, the heat treatment is used to prepare the aluminum all...

Embodiment 2

[0042] (1) Mg: 1.8 wt %, Si: 1.2 wt %, Cu: 2.6 wt %, Pr: 0.6 wt %, Nd: 0.7 wt %, and the balance is Al according to the weight percentage of the constituent elements. The above materials are smelted at a high temperature in a smelting furnace at a temperature of 760 ° C until they are melted;

[0043] (2) adding a refining agent (20wt%NaCl+20wt%KCl+35wt%NaF+25wt%LiF) in a ratio of 2:100 to the mass ratio of the refining agent to the smelting ingredients, after degassing, let stand for 10min;

[0044] (3) pour the alloy melt in the cylindrical mold in the electromagnetic stirring device, carry out low frequency electromagnetic stirring 20Hz, the time is 30s, and then water-cooled to become an ingot;

[0045] (4) The ingot is extruded and drawn, the extrusion temperature is 480 ° C, and the diameter of the wire after drawing is 6 mm;

[0046] (5) Heat treatment (solution + aging) of the wire after drawing: 540°C / 20h+170°C / 6h, the heat treatment is to prepare the aluminum alloy ...

Embodiment 3

[0048] (1) Mg: 1.9 wt %, Si: 1.3 wt %, Cu: 2.4 wt %, Pr: 0.6 wt %, Nd: 0.6 wt %, and the balance is Al according to the weight percentage of the constituent elements. The above-mentioned materials are smelted at a high temperature in a smelting furnace at a temperature of 770 ° C until they are melted;

[0049] (2) adding a refining agent (20wt%NaCl+20wt%KCl+35wt%NaF+25wt%LiF) in a ratio of 1:100 by the mass ratio of refining agent to smelting ingredients to degas, and let stand for 10min;

[0050] (3) pour the alloy melt in the cylindrical mould in the electromagnetic stirring device, carry out low frequency electromagnetic stirring 25Hz, the time is 30s, and then water-cooled to become an ingot;

[0051] (4) The ingot is extruded and drawn, the extrusion temperature is 490 ° C, and the diameter of the wire after drawing is 6 mm;

[0052] (5) Heat treatment (solution + aging) of the wire after drawing: 550°C / 22h+175°C / 6h, the heat treatment is used to prepare the aluminum al...

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Abstract

The invention discloses a novel medium-strength Al-Mg-Si-Cu-Pr-Nd rare earth aluminum alloy cable material. The cable material comprises Mg, Si, Cu, Pr and Nd, the content ratio of the added elements is M (Mg):M(Si):M(Cu)=(14-16):(10-11):(20-22),, all the elements can react within the range, strengthening phases beta''(Mg2Si), S'(Al2CuMg) and theta'(Al2Cu) are generated after aging, the added rare earth element content ratio is M(Pr):M(Nd)=1:1, a precipitated phase Al3(Pr,Nd) with a core-shell structure is precipitated through aging, and the alloy strength and conductivity are improved through cooperation between beta'', S' and theta'.

Description

technical field [0001] The invention relates to a medium-strength rare earth aluminum alloy cable material, in particular to a medium-strength Al-Mg-Si-Cu-Pr-Nd rare earth aluminum alloy cable material. Background technique [0002] The all-aluminum alloy overhead conductor is a kind of overhead conductor circuit with excellent performance that is widely promoted and applied at present. Al-Mg-Si alloys have low alloy density, high elongation, good corrosion resistance, good high temperature characteristics, good creep resistance and can be strengthened by heat treatment to obtain good comprehensive mechanical properties, so that it can be developed to meet all aspects Requirements, so compared to other series of overhead wires, Al-Mg-Si alloys are the most widely studied and most commonly used. [0003] With the extensive research of Al-Mg-Si alloys by the academic community, it was found that there is an opposite relationship between the tensile strength and electrical con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/16C22C21/14C22C1/02
CPCC22C1/026C22C21/14C22C21/16
Inventor 王斌张嘉艺易丹青杨磊曾婉邓群华
Owner CENT SOUTH UNIV
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