Rare earth aluminum alloy cable for railway and conductor preparation method

Abstract

The invention belongs to the technical field of the aluminum alloy material preparation, the nonferrous metal conductor processing forming and the cable manufacturing, and particularly relates to a rare earth aluminum alloy cable for a railway and a conductor preparation method. In the rare earth aluminum alloy cable, the Fe element content is 0.5-1 wt%, the Cu element content is 0.3-0.5 wt%, theB element content is 0.01-0.05 wt%, the Sr element content is 0.01-0.03 wt%, the rare earth element content is 0.01-0.05 wt%, the Si element content is less than 0.05 wt%, and the balance is Al, wherein the rare earth is the mixed rare earth formed by lanthanum, cerium, neodymium and yttrium. The conductor is prepared by using a horizontal continuous casting + continuous extrusion + multi-die drawing technology. Through continuously extruding and shear-deforming, refining tissues and crushing a thick intermetallic compound, the comprehensive property of the alloy is further improved. A novel aluminum alloy cable with good electrical property and corrosion resisting property is provided for the railway. The conductor preparation technology is simple, the investment is small, the cost is low, and the production efficiency is high. The method is suitable for the industrial large-scale batch production, and has the remarkable economic benefit.

Description

technical field [0001] The invention belongs to the technical fields of aluminum alloy material preparation, non-ferrous metal conductor processing and cable manufacturing, and in particular relates to a preparation method of a rare earth aluminum alloy cable and a conductor for railways. Background technique [0002] Both aluminum and copper have excellent electrical conductivity. Compared with copper, aluminum alloy has higher specific strength, and its smaller density determines that it is more suitable for long-distance power transmission. It is one of the preferred conductor materials for the lightweight development of railway cables, but The current electrical aluminum has low strength, poor creep resistance, low elongation, poor flexibility, and the joints are easy to loosen, resulting in increased contact resistance, which will cause safety hazards during use, and it is difficult to meet the requirements of the railway system for cables. [0003] Adding an appropriat...

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Problems solved by technology

[0002] Both aluminum and copper have excellent electrical conductivity. Compared with copper, aluminum alloy has higher specific strength, and its smaller density determines that it is more suitable for long-distance power transmission. It is one of the preferred conductor materials for the lightweight development of railway cables, but The current electrical aluminum has low strength, poor creep resistance, low elongation, poor flexibility, and the joints are easy to loosen, resulting in increased contact resistance, which will cause safety hazards during use, and it is difficult to meet the requirements of the railway system for cables.