High-strength and high-conductivity aluminum alloy used for overhead conductors and preparation method for aluminum alloy

An overhead wire and aluminum alloy technology is applied in the field of aluminum alloy materials to achieve the effects of large furnace loading, energy saving and convenient operation.

Inactive Publication Date: 2020-06-12
JIANGSU HENGTONG ELECTRICAL SPECIAL WIRE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, under the premise of meeting the strength of 315MPa, the aluminum alloy material for overhead wires can only achieve a maximum conductivity of 54% IACS

Method used

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  • High-strength and high-conductivity aluminum alloy used for overhead conductors and preparation method for aluminum alloy
  • High-strength and high-conductivity aluminum alloy used for overhead conductors and preparation method for aluminum alloy
  • High-strength and high-conductivity aluminum alloy used for overhead conductors and preparation method for aluminum alloy

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Embodiment 1

[0030] This embodiment provides a method for preparing a high-strength and high-conductivity aluminum alloy, comprising the following steps:

[0031] S1. According to the element composition ratio in Table 1, select aluminum ingot 99.7, magnesium ingot 99.9, AlSi for remelting 20 Alloy, AlFe 20 Alloy, AlB 3 Alloy, AlCu 50 Alloys are batched.

[0032] Table 1 Element composition ratio content

[0033] element Si Fe Mg Cu B Cr+Mn+V+Ti content 0.62 0.27 0.68 0.07 0 0.006

[0034] S2. Add 99.7 aluminum ingots for remelting into the melting furnace to melt, and add AlB to the aluminum liquid 3 The alloy is subjected to boronization treatment; then the molten aluminum is transferred into the holding furnace, and the temperature of the holding furnace is controlled at 750-780°C, and then the magnesium ingot 99.9, AlSi 20 Alloy, AlFe 20 Alloy, AlCu 50 Put the alloy into the holding furnace and stir it electromagnetically for ≥30 minutes to ma...

Embodiment 2-3

[0040] The difference between embodiment 2-3 and embodiment 1 is only the aging treatment system.

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Abstract

The invention discloses a preparation method for a high-strength and high-conductivity aluminum alloy used for overhead conductors. The preparation method comprises the steps: S1, material preparing is performed with the following components in weight percent: 0.60%-0.80% of Si, not greater than 0.50% of Fe, 0.05%-0.10% of Cu, 0.60%-0.90% of Mg, not greater than 0.03% of Cr, not greater than 0.03%of Mn, not greater than 0.03% of V, not greater than 0.03% of Ti and the balance Al; S2, after an aluminum source is boronized, the boronized aluminum source is melted in a holding furnace together with other raw materials, and molten aluminum is sampled and detected to confirm whether the content of each element reaches a target value or not; S3, when each of the elements of the molten aluminumreaches the target value, casting is started, and then continuous rolling is performed on a casting blank obtained by casting to make an aluminum alloy rod of which the wire diameter is 9.5mm; and S4,the aluminum alloy rod is aged at 180-220 DEG C, wherein the heating rate of 3-5 DEG C / min and the holding time is 5-12h; and then, the aluminum alloy rod is drawn at room temperature to form an aluminum alloy monofilament. The invention further discloses the aluminum alloy prepared by the method. The aluminum alloy monofilament prepared by the invention has high strength and high conductivity, and can realize 56.5% international annealed copper standard (IACS) on the basis of 315MPa strength.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy materials, in particular to a high-strength and high-conductivity aluminum alloy used for overhead wires and a preparation method thereof. Background technique [0002] With the rapid development of the national economy, the power grid construction has made great progress. However, the loss of electric energy also increases accordingly. According to the survey of the power department, the loss of the national grid is more than 8.9% of the electricity transmitted by the power grid. The huge power loss has long made electric workers realize that improving the conductivity of the transmission wire and improving the transmission efficiency of the power grid importance and urgency. [0003] In the field of power transmission, conductivity has a crucial impact on the effective utilization of energy. For every 1% increase in conductivity, the loss of electric energy will be reduced by 1% during t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C21/08C22C1/03C22C1/06C22F1/05C22F1/043C22F1/047H01B1/02
CPCC22C1/026C22C1/03C22C1/06C22C21/02C22C21/08C22F1/043C22F1/047C22F1/05H01B1/023
Inventor 孟博贾伟杨开龙程磊张道卿张佳辉
Owner JIANGSU HENGTONG ELECTRICAL SPECIAL WIRE CO LTD
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