Al-Er alloy conductor material and preparation method thereof

Abstract

The invention relates to an Al-Er alloy conducting wire material and a preparation method thereof, and belongs to the technical field of metal alloy. The function of Er in an aluminum alloy conducting wire is not reported up to the present. The invention discloses a material for the aluminum alloy conducting wire, which comprises the following chemical compositions: 0.01 to 0.4 weight percent of erbium, the balance being Al and unavoidable impurity. The conducting wire with required specification is prepared by smelting, founding and cold-hot processing. The hardness of the conducting wire is 15.83 to 24.82 HBS; the specific resistance of the conducting wire is 0.02806 to 0.02837 ohm square millimeter in per meter; and the electric conductivity of the conducting wire is 60.8 to 61.4 percent IACS. The alloy is a material with favorable cost performance and huge potential for application on high-strong heat-resisting aluminum alloy conducting wires.

Description

technical field

[0001] The invention belongs to the technical field of metal alloys. Background technique

[0002] Long-distance power transmission requires that the wire not only have good conductivity, but also have a certain strength and good heat resistance, and at the same time have a light weight. Aluminum wire has the characteristics of light weight and excellent electrical conductivity, but lacks hardness. The study found that the trace element Zr added to the aluminum wire, the trace Zr helps to improve the hardness of the aluminum alloy, because Zr forms a certain size range of Al 3 Zr precipitates, when the size, shape and distribution of Zr intermetallic compounds are reasonable, can effectively improve the hardness of aluminum alloy. If Zr exists in the form of mesophase instead of solid solution, it will have little effect on the conductivity. The rare earth element Er and Zr have similar characteristics, and the intermetallic compound Al formed by adding ra...

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