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Al-Cu-Sr-RE-Ge aluminium alloy wire for power cable and preparation method thereof

A technology of al-cu-sr-re-ge and aluminum alloy wire, applied in the field of Al-Cu-Sr-RE-Ge aluminum alloy wire for power cables and its preparation, can solve the problem of poor mechanical strength, easy overload and heat generation, etc. problems, to achieve the effect of improving mechanical properties, speeding up movement, and improving thermal properties

Inactive Publication Date: 2020-03-27
安徽峰创云通数据科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because aluminum is used as a conductor, its mechanical strength is poor, a creep, easy to overload and heat and other shortcomings, all ended in failure

Method used

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  • Al-Cu-Sr-RE-Ge aluminium alloy wire for power cable and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] An Al-Cu-Sr-RE-Ge aluminum alloy wire for power cables, consisting of the following components:

[0063] 0.54wt% Cu;

[0064] 0.25 wt% Sr;

[0065] 0.24 wt% RE;

[0066] 0.19 wt% Ge;

[0067] 0.15 wt% Si;

[0068] 0.06 wt% Co;

[0069] 0.04 wt% Ca;

[0070] 0.03 wt% Cr;

[0071] The balance is Al and unavoidable impurities.

[0072] RE is composed of Nd and Sm in a mass ratio of 1:3.

[0073] The preparation method of Al-Cu-Sr-RE-Ge aluminum alloy wire, comprises the following steps:

[0074] (1) Put all raw materials into an intermediate frequency induction furnace for melting, the melting temperature is 770°C; cool down the alloy solution to 715°C for pouring, preheat the mold before pouring to 290°C, air cool to room temperature after pouring, and take out the ingot ;

[0075] Mechanical auxiliary vibration is used in the two processes of melting and pouring in the medium frequency induction furnace. The frequency of mechanical vibration is 70-85Hz. The mec...

Embodiment 2

[0082] An Al-Cu-Sr-RE-Ge aluminum alloy wire for power cables, consisting of the following components:

[0083] 0.45 wt% Cu;

[0084] 0.29 wt% Sr;

[0085] 0.26 wt% RE;

[0086] 0.17 wt% Ge;

[0087] 0.17wt% Si;

[0088] 0.03 wt% Co;

[0089] 0.05 wt% Ca;

[0090] 0.03 wt% Cr;

[0091] The balance is Al and unavoidable impurities.

[0092] RE is composed of Nd and Sm in a mass ratio of 1:5.

[0093] The preparation method of Al-Cu-Sr-RE-Ge aluminum alloy wire, comprises the following steps:

[0094] (1) Put all raw materials into an intermediate frequency induction furnace for melting, the melting temperature is 780°C; cool down the alloy solution to 725°C for pouring, preheat the mold before pouring to 300°C, air cool to room temperature after pouring, and take out the ingot ;

[0095] Mechanical auxiliary vibration is used in the two processes of melting and pouring in the medium frequency induction furnace. The frequency of mechanical vibration is 85Hz, and the me...

Embodiment 3

[0102] An Al-Cu-Sr-RE-Ge aluminum alloy wire for power cables, consisting of the following components:

[0103] 0.58wt% Cu;

[0104] 0.20 wt% Sr;

[0105] 0.22 wt% RE;

[0106] 0.21wt% Ge;

[0107] 0.16wt% Si;

[0108] 0.07wt% Co;

[0109] 0.04 wt% Ca;

[0110] 0.05 wt% Cr;

[0111] The balance is Al and unavoidable impurities.

[0112] RE is composed of Tm and Lu in a mass ratio of 1:1.

[0113] The preparation method of Al-Cu-Sr-RE-Ge aluminum alloy wire, comprises the following steps:

[0114] (1) Put all raw materials into an intermediate frequency induction furnace for melting, the melting temperature is 760°C; cool down the alloy solution to 730°C for casting, preheat the mold before casting to 260°C, air cool to room temperature after pouring, and take out the ingot ;

[0115] Mechanical auxiliary vibration is used in the two processes of melting and pouring in the medium frequency induction furnace. The frequency of mechanical vibration is 70Hz. The mechanica...

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Abstract

The invention provides an Al-Cu-Sr-RE-Ge aluminium alloy wire for a power cable and a preparation method thereof. The Al-Cu-Sr-RE-Ge aluminium alloy wire comprises the following components: 0.4-0.8wt%of Cu, 0.15-0.36wt% of Sr, 0.12-0.32wt% of RE, 0.13-0.28wt% of Ge, 0.11-0.18wt% of Si, 0.02-0.09wt% of Co, 0.03-0.07wt% of Ca, 0.01-0.05wt% of Cr and the balance of Al and unavoidable impurities. Thepreparation method comprises the following steps: 1, smelting and pouring; 2, quenching at 505-520 DEG C, and carrying out aging treatment at 210-225 DEG C; 3, extruding into an aluminium alloy rod at 485-510 DEG C; 4, drawing into a first aluminium alloy wire at 290-310 DEG C; 5, drawing into a second aluminium alloy wire with the diameter of 1-2.5mm at 330-360 DEG C; and 6, carrying out thermalinsulation on the second aluminium alloy wire for 3-5 hours at 350-380 DEG C, then reducing the temperature to 230-260 DEG C, carrying out thermal insulation for 6-10 hours, and air cooling to the room temperature. The Al-Cu-Sr-RE-Ge aluminium alloy wire has excellent electric conductivity and heat resistance and is high in strength, toughness and fatigue resistance.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to an Al-Cu-Sr-RE-Ge aluminum alloy wire for power cables and a preparation method thereof. Background technique [0002] With the vigorous development of my country's electric power industry, the demand for cables as basic materials is increasing day by day. At present, in our country, most of the conductors of cables are made of copper and aluminum. Copper conductors have superior electrical conductivity, corrosion resistance, and mechanical properties, and their consumption far exceeds that of aluminum conductors, making them the preferred material for cable conductors. But it is precisely because of the superior performance of copper conductors that its demand is increasing. However, my country's copper reserves are limited, so my country mainly relies on imports of refined copper. Huge copper consumption, relatively short copper ore resource reserves, and high prices have inh...

Claims

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Application Information

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IPC IPC(8): C22C21/14C22C1/02C22F1/057B21C37/04H01B1/02H01B9/02H01B13/00
CPCB21C37/047C22C1/026C22C21/14C22F1/002C22F1/057H01B1/023H01B9/02H01B13/0006H01B13/0016
Inventor 强银银
Owner 安徽峰创云通数据科技有限公司
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