High-conductivity cable steel for manufacturing lead of thin film capacitor and production method

Abstract

The invention provides high-conductivity cable steel for manufacturing a lead of a thin film capacitor. The high-conductivity cable steel comprises the following components in percentage by weight: not greater than 0.003% of C, not greater than 0.02% of Si, not greater than 0.055% of Mn, not greater than 0.015% of P, not greater than 0.007% of S, not greater than 0.005% of N and not greater than 0.01% of Alt. A method comprises the following steps of: carrying out steelmaking after molten iron is desulfurized; carrying out RH vacuum treatment; carrying out continuous casting; heating a castingblank; stacking and naturally cooling to room temperature; carrying out rough rolling; carrying out finish rolling; spinning; carrying out heat preservation; and standing by. According to the high-conductivity cable steel and the production method, the conductivity is not less than 16.9% and is improved by at least 5% in comparison with the prior art on the premise of ensuring that the tensile strength is not greater than 275MPa and the elongation A is not less than 45%; and the number and the size of B-type inclusion particles can be controlled, so that the steel has good drawing performanceand can be finely drawn to be less than 0.1mm, and the drawing requirements of higher-end users are met.

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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