A kind of high-conductivity cable steel for making film capacitor leads and its production method

Abstract

A steel for high-conductivity cables used to make lead wires of film capacitors, the composition and wt% of which are: C: no more than 0.003%, Si no more than 0.02%, Mn: no more than 0.055%, P≦0.015%, S≦0.007 %, N≦0.005%, AlT not more than 0.01%; method: steelmaking after molten iron desulfurization; RH vacuum treatment; continuous casting; ;stand-by. Under the premise of ensuring tensile strength ≤ 275MPa and elongation A ≥ 45%, the present invention has electrical conductivity ≥ 16.9%, which is at least 5% higher than that of the prior art; and can control the number and size of B-type inclusion particles, so that the steel has good Excellent drawing performance, can be finely drawn to less than 0.1mm, to meet the drawing requirements of higher-end users.

Description

technical field [0001] The invention relates to a steel for cables and a production method, in particular to a steel with high conductivity for making lead wires of film capacitors and a production method for cables. Background technique [0002] Steel for cables, commonly known as copper-clad steel, is mainly used to make copper-clad steel wires through a series of processes. In telecommunications, copper-clad steel wires combine the tensile strength and toughness of steel (twice that of pure copper wires), The electrical conductivity and high-frequency characteristics of copper, light weight (12% lighter than pure copper wire), no creep, can withstand the attack of wind, snow and hail, and can withstand large-span, salt spray and corrosive environments, so it can reduce The distortion and distortion of the transmitted information improves the transmission quality. And it has the advantages of saving copper and reducing costs. It is a substitute for pure copper wire produc...

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Problems solved by technology

Although the tensile strength of the product made in this document can reach 560~750Mpa, and its electrical conductivity is more than 16.2%, it has good drawing performance; And the operation is simple and meets the production requirements, but its shortcomings: one is that the electrical conductivity has not reached a very high level, that is, it has not exceeded 16.7%; Low, for the current CP line, it is not enough to meet the use

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