Preparing method of stainless steel/copper multi-core composite wire

Abstract

The invention discloses a preparing method of a stainless steel / copper multi-core composite wire. The method comprises the following steps that firstly, a copper bar is loaded in a stainless steel sheath, and two ends are subjected to sealing welding; secondly, through hot extrusion, a stainless steel / copper single-core composite bar is obtained; thirdly, multi-pass drawing is carried out to obtain a stainless steel / copper single-core composite wire; fourthly, straightening, sizing, cutting off, acid pickling and drying are carried out in sequence; and fifthly, bundling assembling is carried out to obtain a stainless steel / copper multi-core composite body, the sealing welding process, the hot extrusion process and the multi-pass drawing process are sequentially repeated, and through in-order putting, the a stainless steel / copper multi-core composite wire is obtained. Through the bundling assembling drawing method and in combination with hot extrusion, the excellent physical and chemical characteristics of the stainless steel are used, through design of the machining process and parameters, the synchronous coordinated deforming capacity of a stainless steel base body and a copper core wire can be greatly improved, the good stainless steel / copper interface combination effect can be formed, and the tensile strength and the conductive property of the stainless steel / copper multi-core composite wire can be improved.

Description

technical field [0001] The invention belongs to the technical field of high-temperature protection of refractory metals, and in particular relates to a preparation method of a stainless steel / copper multi-core composite wire. Background technique [0002] High-strength and high-conductivity copper-based composite materials are non-ferrous metal materials with excellent physical and mechanical properties. Among them, deformed copper-based composite materials are one of the research hotspots and development directions of high-strength and high-conductivity copper alloys, such as Cu-Ag, Cu- Composite materials such as Nb, Cu-C, Cu-Zr and Cu-Ta have been researched and prepared one after another, and are widely used in high pulse magnetic field conductor materials, transfer switches, electrical contactors, lead frames and electronic devices. With the continuous expansion of the application field of copper-based composite materials and the rapid growth of consumption, Cu-based co...

AI Technical Summary

Problems solved by technology

After decades of development, researchers have carried out all-round experiments. The Cu-Nb microcomposite material prepared by cluster drawing technology has reached the processing limit, and it is difficult to further improve the performance. Moreover, the processing technology is complicated and the process is complicated. The cycle is relatively lagging, which greatly hinders the expansion and application of new fields, so that the pulse field strength of the National Pulse Magnetic Field Center cannot make further breakthroughs