High-conductivity aluminum alloy material for cable and preparation method thereof

Abstract

The invention relates to a high-conductivity aluminum alloy material for a cable and a preparation method thereof. The aluminum alloy material comprises the following components in percentage by weight: 0.25-0.80 percent of iron element, 0.02-0.15 percent of boron element, 0.1-1.5 percent of rare earth element and the balance of aluminum and inevitable impurities. The aluminum alloy is formed by adding an aluminum alloy intermediate alloy, an aluminum-boron alloy and an aluminum-rare earth intermediate alloy into an aluminum ingot of which the purity is more than 99.80 percent by weight and carrying out a casting process and annealing treatment on the mixture. Compared with a common electric aluminum conductor, the prepared aluminum alloy conductor has more excellent conductive performance and the conductivity reaching or exceeding 62.5 percent IACS (International Annealed Copper Standard); the aluminum alloy conductor treated by using a special process has excellent flexibility and creep resistance; and compared with a common electric aluminum conductor, the prepared aluminum alloy material used as a cable extrusion insulating lead core is more energy-saving and safer.

Description

technical field

[0001] The invention belongs to the field of nonferrous metal materials, and in particular relates to a high-conductivity aluminum alloy material for cables and a preparation method thereof. Background technique

[0002] At present, most wire and cable conductors use copper conductors. Due to the shortage of copper resources and high copper prices, copper conductors account for about 70% of the cost of copper cables, and the cost of manufacturing copper cables is too high. However, if pure aluminum is used, large creep will occur after long-term operation or current overload, resulting in too large contact resistance, which is easy to cause accidents, and the bending performance is not good, easy to crack or break, which is also easy to cause accidents. Although the bending performance of ordinary electrical aluminum conductors can be improved through annealing treatment, and the electrical properties are also greatly improved, but the strength of pure alumin...

Examples

Embodiment 1

[0027] A high-conductivity aluminum alloy material for cables, the composition ratio of the alloy is as follows, the weight percentage of iron is: 0.25-0.80%, for example, it can be 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, or Contains boron, the boron accounts for 0.02-0.15% by weight of the alloy, for example, it can be selected as: 0.03%, 0.04%, 0.06%, 0.08%, 0.09%, 0.11%, 0.13%, 0.14%, and the rest is aluminum and unavoidable impurities.

[0028] In the above technical solution, by weight percentage, the content of impurity silicon in the alloy is <0.03%, the content of other single impurity elements is <0.01%, and the total content of other impurities is <0.1%.

Embodiment 2

[0030] A high-conductivity aluminum alloy material for cables, the composition ratio of the alloy is as follows, the weight percentage of iron is: 0.25-0.80%, for example, it can be 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, or Contains rare earths, the weight percentage of the rare earths in the alloy ranges from 0.1 to 1.5%, such as 0.2%, 0.4%, 0.6%, 0.9%, 1.1%, 1.3%, and the rest is aluminum and unavoidable impurities .

[0031] In the above technical solution, the rare earth element is rich in cerium and lanthanum, and the minimum weight percentage of a single element is not less than 0.05%. The weight percent content of rare earth elements is preferably 0.30-1.0%. By weight percentage, the content of impurity silicon in the alloy is <0.03%, the content of other single impurity elements is <0.01%, and the total content of other impurities is <0.1%.

Embodiment 3

[0033] A high-conductivity aluminum alloy material for cables, the composition ratio of the alloy is as follows, the weight percentage of iron is: 0.25-0.80%, for example, it can be 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, or Contains boron and rare earth, and the boron accounts for 0.02-0.15% by weight of the alloy, for example, it can be selected as: 0.03%, 0.04%, 0.06%, 0.08%, 0.09%, 0.11%, 0.13%, 0.14%. The weight percent of the rare earth in the alloy ranges from 0.1 to 1.5%, such as 0.2%, 0.4%, 0.6%, 0.9%, 1.1%, and 1.3%, and the rest is aluminum and unavoidable impurities.

[0034] In the above technical solution, the rare earth element is rich in cerium and lanthanum, and the minimum weight percentage of a single element is not less than 0.05%. The weight percent content of the rare earth element is 0.30-1.0%. By weight percentage, the content of impurity silicon in the alloy is <0.03%, the content of other single impurity elements is <0.01%, and the total content of other impurit...

technical field

[0001] The invention belongs to the field of nonferrous metal materials, and in particular relates to a high-conductivity aluminum alloy material for cables and a preparation method thereof. Background technique

[0002] At present, most wire and cable conductors use copper conductors. Due to the shortage of copper resources and high copper prices, copper conductors account for about 70% of the cost of copper cables, and the cost of manufacturing copper cables is too high. However, if pure aluminum is used, large creep will occur after long-term operation or current overload, resulting in too large contact resistance, which is easy to cause accidents, and the bending performance is not good, easy to crack or break, which is also easy to cause accidents. Although the bending performance of ordinary electrical aluminum conductors can be improved through annealing treatment, and the electrical properties are also greatly improved, but the strength of pure alumin...

Examples

Embodiment 1

[0027] A high-conductivity aluminum alloy material for cables, the composition ratio of the alloy is as follows, the weight percentage of iron is: 0.25-0.80%, for example, it can be 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, or Contains boron, the boron accounts for 0.02-0.15% by weight of the alloy, for example, it can be selected as: 0.03%, 0.04%, 0.06%, 0.08%, 0.09%, 0.11%, 0.13%, 0.14%, and the rest is aluminum and unavoidable impurities.

[0028] In the above technical solution, by weight percentage, the content of impurity silicon in the alloy is <0.03%, the content of other single impurity elements is <0.01%, and the total content of other impurities is <0.1%.

Embodiment 2

[0030] A high-conductivity aluminum alloy material for cables, the composition ratio of the alloy is as follows, the weight percentage of iron is: 0.25-0.80%, for example, it can be 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, or Contains rare earths, the weight percentage of the rare earths in the alloy ranges from 0.1 to 1.5%, such as 0.2%, 0.4%, 0.6%, 0.9%, 1.1%, 1.3%, and the rest is aluminum and unavoidable impurities .

[0031] In the above technical solution, the rare earth element is rich in cerium and lanthanum, and the minimum weight percentage of a single element is not less than 0.05%. The weight percent content of rare earth elements is preferably 0.30-1.0%. By weight percentage, the content of impurity silicon in the alloy is <0.03%, the content of other single impurity elements is <0.01%, and the total content of other impurities is <0.1%.

Embodiment 3

[0033] A high-conductivity aluminum alloy material for cables, the composition ratio of the alloy is as follows, the weight percentage of iron is: 0.25-0.80%, for example, it can be 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, or Contains boron and rare earth, and the boron accounts for 0.02-0.15% by weight of the alloy, for example, it can be selected as: 0.03%, 0.04%, 0.06%, 0.08%, 0.09%, 0.11%, 0.13%, 0.14%. The weight percent of the rare earth in the alloy ranges from 0.1 to 1.5%, such as 0.2%, 0.4%, 0.6%, 0.9%, 1.1%, and 1.3%, and the rest is aluminum and unavoidable impurities.

[0034] In the above technical solution, the rare earth element is rich in cerium and lanthanum, and the minimum weight percentage of a single element is not less than 0.05%. The weight percent content of the rare earth element is 0.30-1.0%. By weight percentage, the content of impurity silicon in the alloy is <0.03%, the content of other single impurity elements is <0.01%, and the total content of other impurit...

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