Production method for long span aluminum clad steel stranded wires

Abstract

The invention discloses a production method for long span aluminum clad steel stranded wires. the method comprises the following steps that steel wire rods are bent and peeling is conducted on the steel wire rods; constraint coating and drawing are conducted; steel wire surface processing is conducted; steel wire ultrasonic wave cleaning is conducted; steel wire induction heating is conducted; aluminum rod surface pre-processing is conducted; short groove distance continuous squeezing is conducted; dual metal rapid synchronous deformation is conducted; aluminum clad steel wire compound wound is conducted; the steel stranded wires are wrapped by aluminum. According to the production method for the long span aluminum clad steel stranded wires, the continuous short groove distance continuous squeezing technology and the dual metal rapid synchronous deformation technology are adopted; compared with traditional aluminum clad steel stranded wires, the long span aluminum clad steel stranded wires manufactured by the production method have the advantages of being long in conveying distance, low in bearing load, small in sagging, high in conductive rate, good in corrosion resisting performance, long in service life, high in intensity, good in thermal stability, capable of being widely applied to ground wires for electric power transmission lines, long span conductive lines, carrier cables for electrified railway contact networks and overhead electric conductive lines used in special environments such as coastal areas.

Description

[0001] technical field [0002] The invention relates to the technical field of electric wires and cables, and relates to a production method of aluminum-clad steel strands, in particular to a production method of large-span aluminum-clad steel strands. Background technique [0003] Aluminum-clad steel wire is a bimetallic structure composed of a round steel wire that is evenly and continuously tightly coated with a thinner aluminum layer. Aluminum-clad steel wire has high strength and excellent heat resistance because its main body is steel; aluminum-clad steel wire has excellent corrosion resistance because its surface is protected by an aluminum layer; aluminum-clad steel wire can be used in a wide range according to needs Adjust the strength and conductivity. Under the condition of synchronous stretching, the basic parameters such as the aluminum / steel structure ratio, conductivity, and density of the aluminum-clad steel wire are fixed. [0004] Aluminum-clad steel wire...

AI Technical Summary

Problems solved by technology

[0005] The production process of aluminum-clad steel wire is complicated, and several different production methods have appeared at home and abroad, which can be roughly divided into the following categories: ① Aluminum sheet rolling and wrapping method, aluminum-clad steel wire produced by rolling and wrapping method, due to its rolling After cladding, the surface is only smooth and rounded, and cannot be stretched. The tensile strength of the finished aluminum-clad steel wire is generally not greater than 1000 MPa; Generally, the thickness of the coating is uneven, and the coating is hard and brittle, so it is not suitable for reprocessing, and it is not suitable for application in overhead transmission lines; ③Aluminum powder extrusion sintering method, aluminum powder is extruded and coated on the steel core, and then sintered to form aluminum-clad steel Wire blank, and then processed into finished aluminum-clad steel wire

However, the physical performance indicators such as tensile strength, anti-corrosion performance, and electrical conductivity of the aluminum-clad steel wire produced by these methods cannot meet the requirements of the corresponding standards.