High-strength, high-conductivity and heat-resisting aluminum alloy bus and production method thereof

Abstract

The invention discloses a high-strength, high-conductivity and heat-resisting aluminum alloy bus and a production method thereof. The high-strength, high-conductivity and heat-resisting aluminum alloy bus comprises the following components in percentage by mass: 0.4-1.1 percent of magnesium (Mg), 0.3-0.9 percent of silicon (Si), 0.85-2.1 percent of copper (Cu), 0.03-0.3 percent of zirconium (Zr), 0.05-0.38 percent of rare earth (La), less than 0.4 percent of Ferrum (Fe), less than 0.01 percent of manganese (Mn) and the balance of aluminum (Al), wherein the ratio of Cu to Mg is 1.9-2.3. The production method comprises the steps of: uniformly annealing a cast ingot obtained through smelting and casting for 10-20h at a temperature of 470-550 DEG C, furnace-cooling; controlling the temperature of the cast ingot to be 480-540 DEG C for thermally deforming, wherein the final temperature of the thermal deformation is not less than 380 DEG C, the total deformation rate of the thermal deformation reaches 80-94 percent; then carrying out cold deformation on a thermally deformed blank at the total deformation rate of 80-90 percent; annealing the deformed product, wherein the annealing temperature is 330-350 DEG C, the insulation time is 2h; carrying out solution treatment for 1-3h at a temperature of 490-525 DEG C; and carrying out artificial ageing treatment for 24-36h at a temperature of 175-200 DEG C.

Description

technical field [0001] The invention relates to a production method of a high-strength, high-conductivity, heat-resistant aluminum alloy bus bar material, which belongs to the technical field of nonferrous metals. Background technique [0002] Bus bars are generally used for the connection of voltage distribution devices at all levels in substations, as well as the connection of electrical equipment such as transformers and corresponding power distribution devices. Most of them use bare or twisted wires with rectangular or circular cross-sections. and transmit electricity. In order to achieve high conductivity, the busbar is mostly made of high conductivity copper (copper bar) and aluminum materials. [0003] At present, most of the busbar materials used in China are soft aluminum, soft aluminum alloy, hard aluminum and hard aluminum alloy. According to the national standard (GB / T5585.2-2005 aluminum and aluminum alloy bus bars), the DC resistivity of soft aluminum and sof...

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Problems solved by technology

[0004] The country that studies more aluminum and aluminum alloy busbar materials is Japan, which has developed a batch of high-strength heat-resistant aluminum alloy materials. However, most researchers only conduct research on the composition of aluminum and aluminum alloy materials. The developed aluminum alloy materials cannot Achieve high strength, high conductivity, and heat resistance at the same time, so the development of large-capacity, high-strength, and heat-resistant aluminum alloy materials has always been a blank in the industry