A kind of aluminum-clad steel wire and its manufacturing process

Abstract

The invention relates to an aluminium-covered steel wire, and a manufacturing method for the aluminium-covered steel wire comprises the following steps: (1) carrying out the preprocessing of a steel core; (2) carrying out the tempering of a steel wire; (3) carrying out the surface treatment of the steel wire after tempering; (4) carrying out wrapping and welding: processing the rough surface of a pure aluminium band, enabling the pure aluminium band and the steel wire to be conveyed into a continuous wrapping welding machine at the same time, carrying out the curving of the pure aluminium band in the continuous wrapping welding machine, enabling the pure aluminium band to be wrapped on the surface of the steel wire, enabling the wrapped steel wire to enter into a wrapping welding box filled with inert gas, enabling two opposite edges of the pure aluminium band to be welded, and forming an aluminium pipe; (5) enabling a wrapped semi-finished product to be stretched initially, and eliminating a gap between the aluminium pipe and the steel wire through pulling; (6) carrying out the rolling of the stretched material for one to four times, carrying out the on-line heating of the aluminium-covered steel wire in a rolling process, and obtaining the aluminium-covered steel wire. The steel wire is low in cost, is low in energy consumption, and is stable in electrical performance of a finished product.

Description

technical field [0001] The invention belongs to the technical field of wire and cable conductors, and in particular relates to a bimetallic high-voltage wire and a manufacturing process thereof. Background technique [0002] Aluminum-clad steel wire is a bimetallic wire composed of a round steel wire that is uniformly and continuously tightly coated with a layer of pure aluminum. It has the characteristics of high strength, heat resistance, corrosion resistance, large capacity, and low loss. Therefore, It has irreplaceable advantages in long-distance power transmission. [0003] The aluminum-clad steel wire in the prior art usually uses a continuous extrusion coating machine to form the aluminum rod into a semi-molten state in the mold cavity, so that it passes through both sides of the steel wire at the same time, and under the action of extrusion force and traction, it is combined with the steel wire. Composite, extrude the die hole together to form a steel wire covered w...

AI Technical Summary

Problems solved by technology

[0004] 1. In the existing technology, the continuous extrusion coating method is used for production, and the surface of the raw material is required to be pickled in advance, and the discharge of pickling waste will cause environmental pollution;

[0005] 2. Continuous extrusion coating machine is used for production, which has low efficiency, high equipment cost and large power consumption;

[0006] 3. The aluminum layer of the finished aluminum-clad steel wire has a single specification, and the conductivity of the wire cannot be adjusted through the manufacturing process;

[0007] 4. The bonding force between steel and aluminum is poor, the aluminum layer is easy to crack during the drawing process, and the bonding surface between aluminum and steel is also easy to separate

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