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

A composite wire and stainless steel technology, which is applied in the field of preparation of stainless steel/copper multi-core composite wire, can solve the problems that the pulse field strength cannot be further broken through, hinder the expansion and application of new fields, and the processing technology is complex, etc., to achieve good stainless steel/copper Effect of interfacial bonding, synchronously coordinated deformation enhancement, good tensile strength and electrical conductivity

Inactive Publication Date: 2020-02-14
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment includes the following steps:

[0027] Step 1. Vertically put a copper rod with a diameter of 57mm into a stainless steel sheath with an outer diameter of 65.0mm and an inner diameter of 60.0mm, and then use vacuum electron beam welding to seal and weld both ends of the stainless steel sheath with the copper rod, Obtain stainless steel / copper single core composite sheath;

[0028] Step 2. Heat the stainless steel / copper single-core composite sheath obtained in step 1 at a temperature of 600° C. for 3 hours, and then perform hot extrusion at an extrusion ratio of 6.5 to obtain a stainless steel / copper with a diameter of 25.5 mm. Single core composite rod;

[0029]Step 3, the stainless steel / copper single-core composite rod obtained in step 2 is drawn in multiple passes to obtain a stainless steel / copper single-core composite wire with a regular hexagonal cross section; the distance between the sides of the regular hexagon is 2.5 mm; the pass processing ...

Embodiment 2

[0034] This embodiment includes the following steps:

[0035] Step 1. Vertically put a copper rod with a diameter of 40mm into a stainless steel sheath with an outer diameter of 65.0mm and an inner diameter of 60.0mm, and then use vacuum electron beam welding to seal and weld the two ends of the stainless steel sheath with the copper rod. Obtain stainless steel / copper single core composite sheath;

[0036] Step 2. Insulate the stainless steel / copper single-core composite sheath obtained in step 1 at a temperature of 650°C for 4 hours, and then perform hot extrusion at an extrusion ratio of 7 to obtain a stainless steel / copper with a diameter of 24.6mm. Single core composite rod;

[0037] Step 3, the stainless steel / copper single-core composite rod obtained in step 2 is drawn in multiple passes to obtain a stainless steel / copper single-core composite wire with a regular hexagonal cross section; the distance between the sides of the regular hexagon is 3.0 mm; the pass processi...

Embodiment 3

[0042] This embodiment includes the following steps:

[0043] Step 1. Vertically put a copper rod with a diameter of 57mm into a stainless steel sheath with an outer diameter of 65.0mm and an inner diameter of 60.0mm, and then use vacuum electron beam welding to seal and weld both ends of the stainless steel sheath with the copper rod, Obtain stainless steel / copper single core composite sheath;

[0044] Step 2. Insulate the stainless steel / copper single-core composite sheath obtained in step 1 at a temperature of 650° C. for 2.5 hours, and then perform hot extrusion at an extrusion ratio of 6 to obtain a stainless steel / copper core with a diameter of 26.5 mm. Copper single core composite rod;

[0045] Step 3, the stainless steel / copper single-core composite rod obtained in step 2 is drawn in multiple passes to obtain a stainless steel / copper single-core composite wire with a regular hexagonal cross section; the distance between the sides of the regular hexagon is 2.0 mm; the...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/04
CPCB21C37/045
Inventor 王鹏飞梁明徐晓燕冯建情段颖李成山张平祥
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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