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A kind of aluminum alloy for the main frame structure of transmission tower and its preparation method

A transmission tower and aluminum alloy technology, applied in the field of aluminum alloy casting, can solve the problems of unsuitable transmission towers, poor corrosion resistance, harsh natural environment, etc.

Active Publication Date: 2020-10-20
福建祥鑫股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problem that the existing aluminum alloy is not suitable for the harsh natural environment of the transmission tower and has poor corrosion resistance, and provides an aluminum alloy for the main frame structure of the transmission tower and its preparation method

Method used

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specific Embodiment approach 1

[0015] Specific Embodiment 1: In this embodiment, an aluminum alloy for the main frame structure of a power transmission tower consists of 5.5-6.5% Zn, 1.2-1.9% Mg, 0.1-0.3% Mn, 0.05-0.25% Cu, 0.05-0.25% Zr, 0.02-0.1% Ti, Fe≤0.25%, Si≤0.15%, the balance is composed of Al and other unavoidable impurity elements; the total mass of other unavoidable impurity elements does not exceed 0.15% of the total mass of the alloy.

specific Embodiment approach 2

[0016] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the aluminum alloy used for the main frame structure of the transmission tower is composed of 6.2% Zn, 1.8% Mg, 0.15% Mn, 0.2% Cu, 0.1% Zr according to the mass percentage , 0.08% Ti, 0.18% Fe, 0.1% Si, and the balance is composed of Al and other unavoidable impurity elements; the total mass of other unavoidable impurity elements does not exceed 0.15% of the total mass of the alloy. Others are the same as the first embodiment.

specific Embodiment approach 3

[0017] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the sum of the contents of Mn, Zr and Ti in the aluminum alloy used for the main frame structure of the transmission tower is greater than 0.3%. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses an aluminum alloy for a main frame structure of a transmission tower and a preparation method thereof and relates to the field of aluminum alloy casting, in particular to an aluminum alloy for a main frame structure of a transmission tower and a preparation method thereof. The aluminum alloy aims to solve the problem that an existing aluminum alloy is not suitable for the severe natural environment of the transmission tower and is poor in corrosion resistance. The aluminum alloy is prepared from the following elements in percent by mass: 5.5-6.5% of Zn, 1.2-1.9% of Mg, 0.1-0.3% of Mn, 0.05-0.25% of Cu, 0.05-0.25% of Zr, 0.02-0.1% of Ti, less than or equal to 0.25% of Fe, less than or equal to 0.15% of Si and the balance of Al and other inevitable impurity elements. The preparation method comprises the following steps: I, material preparation; II, smelting; III, refining and heating; IV, modification; and V, casting and twin-stage heat treatment. The preparation method disclosed by the invention is used for casting the high strength aluminum alloy for the main frame structure of the transmission tower.

Description

technical field [0001] The invention relates to the field of aluminum alloy casting, in particular to an aluminum alloy used for the main frame structure of a power transmission tower and a preparation method thereof. Background technique [0002] At present, most of the transmission poles and towers in my country are made of steel, and most of the transmission poles and towers are built in mountainous areas with harsh terrain conditions. Therefore, the transportation is difficult and the cost remains high. Therefore, reducing the transportation and component costs of transmission towers is the main problem that needs to be solved urgently. [0003] Aluminum alloy is a widely used material, and its density is low, about 1 / 3 of that of steel. If it is used to manufacture transmission towers, it will inevitably greatly reduce the cost of the tower itself and transportation costs. At present, in the tower structure, the main frame structure materials account for the vast major...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22C1/03C22C1/06C22F1/053
CPCC22C1/026C22C1/03C22C1/06C22C21/10C22F1/053
Inventor 黄铁明黄铁兴冯永平刘金霞池海涛戴应鑫
Owner 福建祥鑫股份有限公司
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