Preparation method for steel fiber copper-covered steel wire

Abstract

The invention relates to a preparation method for a steel fiber copper-covered steel wire. The method comprises the following steps: sleeving a steel fiber into a copper tube and drawing for three times continuously; heating and annealing the drawn copper-covered steel fiber; sleeving the annealed copper-covered steel fiber into another copper tube, and drawing for three times continuously; heating the drawn copper-covered steel fiber and quickly putting the heated drawn copper-covered steel fiber into saline water for performing quenching treatment; integrating treated copper-covered steel fibers into a copper-covered fiber bundle; putting the copper-covered fiber bundle into an Ag-Ni-Nb alloy tube for drawing; putting an alloy composite body into the copper tube for drawing to obtain the steel fiber copper-covered steel wire. The steel fiber copper-covered steel wire prepared by the invention has the electric conductivity of 38 percent of IACS (international annealed copper standard) to 43 percent of IACS, and the tensile strength of over 1,200 Mpa.

Description

technical field [0001] The invention relates to a method for preparing steel fiber copper-clad steel wire. Background technique [0002] Copper has excellent electrical conductivity, but it is expensive and has low hardness and tensile strength. Steel has excellent mechanical properties, but low electrical conductivity and insufficient corrosion resistance. At present, copper-clad steel wires on the market include electroplating method and co-casting method, and the thickness of copper layer of copper-clad steel produced by electroplating method is relatively low, only 0.25mm-0.5mm. Under high temperature conditions, the solubility of iron in copper is relatively large, but the precipitation at low temperature is slow, and the solid-dissolved iron atoms will greatly reduce the conductivity of copper-clad steel. The residual iron in the copper matrix has a great impact on the conductivity, and Every time 0.1% iron is dissolved in the copper matrix, the conductivity can be r...

AI Technical Summary

Problems solved by technology

Under high temperature conditions, the solubility of iron in copper is relatively large, but the precipitation at low temperature is slow, and the solid-dissolved iron atoms will greatly reduce the conductivity of copper-clad steel. The residual iron in the copper matrix has a great impact on the conductivity, and Every time 0.1% iron is dissolved in the copper matrix, the electrical conductivity can be reduced by 30%, so the corrosion resistance is limited. In addition, if the heat treatment time is too long, the fibers are easy to coarsen, which directly leads to a decrease in the strength of the material.

The thickness of the copper layer of copper-clad steel produced by the same casting method can not be very thick, and the iron atoms in solid solution at high temperature will greatly reduce the conductivity of copper-clad steel

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