Low-cost 63% IACS high-conductivity duralumin conductor and manufacturing method thereof

Abstract

The invention discloses a low-cost 63% IACS high-conductivity duralumin conductor and a manufacturing method thereof. The method comprises the steps that firstly, electrician aluminum is smelted, wherein a 99.90% high-purity aluminum ingot is selected; secondly, rare earth treatment and boronizing treatment are conducted on molten aluminum, all elements in the molten aluminum comprise, by mass percent, smaller than or equal to 0.03 wt% of Si, smaller than or equal to 0.06 wt% of Fe, smaller than or equal to 0.005 wt% of (Cr+V+Mn+Ti), 0.01 wt%-0.03 wt% of B, 0.01 wt%-0.03 wt% of rare earth and larger than or equal to 99.88 wt% of Al, and the rare earth includes La, Y and Er; thirdly, the molten aluminum in the second step is continuously cast and rolled, an aluminum rod is produced, the aluminum rod with the diameter phi of 7.5 mm is extruded through an aluminum extruder, and aluminum wires of various shapes and specifications are formed through cold drawing and drawing; and fourthly, the aluminum wires are stranded to form the aluminum conductor according to the design requirement, wherein the tensile strength of the aluminum conductor is larger than or equal to 168 MPa, and the conductor resistance rate is smaller than or equal to 0.027350 omega.mm<2> / m at the temperature of 20 DEG C. The duralumin conductor has excellent electric conduction performance, the cost of the conductor is reduced by 15%-25%, and the economic efficiency of a circuit is further improved.

Description

technical field [0001] The invention relates to a low-cost 63% IACS high-conductivity duralumin wire and a manufacturing method thereof. Background technique [0002] The characteristic of my country's electric power construction development strategy is to vigorously develop western power resources, realize west-east power transmission and national networking, in order to accomplish the above strategic goals, national power development will closely combine with the strategic deployment of western development, and vigorously develop western power resources. At present, with the rapid development of the national economy, the construction of the power grid has been accelerated. However, the loss of electric energy also increases accordingly. According to the survey of the electric power department, the loss of the national grid is more than 8.9% of the electricity transmitted by the grid. The huge loss of electric energy has already made my country's electric workers realize th...

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Problems solved by technology

However, with the improvement of the conductivity of the aluminum conductor, its manufacturing cost also increases accordingly. At present, the more mature 62.5% IACS duralumin conductors in China mostly use 99.85% aluminum ingots as raw materials, and the 63% IACS duralumin conductors mostly use 99.99% aluminum Ingots are raw materials, and 99.99% aluminum ingots are about 8,000 yuan / ton more expensive than 99.85% aluminum ingots

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