Aluminum alloy material, conducting bar and calculation method of creep residual life of conducting bar

Abstract

The embodiment of the invention discloses an aluminum alloy material, a conducting bar and a creep residual life calculation method of the conducting bar. The aluminum alloy material comprises an aluminum element, a boron element, a zirconium element and a rare earth element, the content of the boron element is smaller than or equal to 0.025%, the content of the zirconium element is smaller than or equal to 0.2%, and the content of the rare earth element is smaller than or equal to 0.15%. According to the embodiment, grain refinement is achieved by setting the content of the boron element, and the mechanical property and the electric conductivity of the aluminum alloy are improved; by setting the content of the zirconium element, the stress corrosion resistance and other properties of the aluminum alloy are improved; by setting the content of rare earth elements, the high-temperature creep property of the aluminum alloy is improved, and oxide inclusions and the like in the aluminum alloy are reduced. Therefore, according to the embodiment of the invention, the conductivity and creep resistance of the aluminum alloy for the conducting bar can be enhanced, and the problem of failure of a circulating chain type connection area caused by material creep after the existing aluminum alloy conducting bar is used for a long time can be relieved and even solved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of power transmission and distribution, and in particular to an aluminum alloy material, a conductive bar and a calculation method for its remaining creep life. Background technique [0002] As a high-current conductive product, the conductive connection bar, also known as the conductive bar, is widely used in engineering practice such as high and low voltage electrical appliances, switch contacts, power distribution equipment and bus ducts. [0003] At present, in the subdivision field of power transmission, T2 copper with high conductivity is the preferred material for conductive bars. Compared with T2 copper, although the conductivity of aluminum alloy is low, it has many advantages such as high specific strength and low cost. Based on this, the replacement of copper conductive bars by aluminum alloy conductive bars is gradually being accepted by the industries involved. [000...

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Problems solved by technology

[0005] The embodiment of the present invention provides an aluminum alloy material, a conductive row and a calculation method for its creep remaining life, so as to enhance the conductivity and creep resistance of the aluminum alloy used for the conductive row, which is beneficial to alleviate or even solve the long-term use of the aluminum alloy conductive row The problem of cyclic cascading failure of the connection area caused by material creep

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