Method for preparing nanometer high-strength copper flat wire through pulling-up, continuous ECAP, and drawing processes

A high-strength, copper flat wire technology, applied in the direction of cable/conductor manufacturing, electrical components, circuits, etc., can solve problems such as energy waste and reduce enterprise production efficiency, and achieve the effects of reducing energy waste, improving production efficiency, and high thermal conductivity

Inactive Publication Date: 2016-11-09
SHANDONG JIANZHU UNIV
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Problems solved by technology

[0003] There is no refining procedure in the upward induction method industrial frequency furnace, so under normal circumstances, after the metal smelting process, the solution used in th

Method used

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  • Method for preparing nanometer high-strength copper flat wire through pulling-up, continuous ECAP, and drawing processes
  • Method for preparing nanometer high-strength copper flat wire through pulling-up, continuous ECAP, and drawing processes
  • Method for preparing nanometer high-strength copper flat wire through pulling-up, continuous ECAP, and drawing processes

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[0021] (1) Smelting process: washing and cleaning copper ore, pre-drying treatment, and then figure 1 As shown, smelting and refining are performed to obtain a copper solution, and then Mg: 2.5%-3.3%, the balance being the Cu content, is configured to obtain the required copper melt. The copper rod blank is prepared by the up-drawing method: the copper melt obtained in step (1) is passed through Figure one The middle melt outlet 4 is introduced into the molten pool 10, and a standard graphite mold is selected to prepare a copper rod blank with a circular cross-sectional diameter of 17.15 mm.

[0022] (2) Continuous ECAP extrusion process for preparing nano high-strength copper rectangular wires: the copper rod blank with a circular cross-section diameter of 17.15 mm prepared in step (1) is used with a copper wire continuous rolling mill and the friction of the roller is used as the driving force , So that the billet enters the continuous ECAP extrusion process, the die is like ...

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Abstract

The invention relates to a method for preparing high-strength copper flat wire, which combines smelting with efficient up-drawing continuous casting technology, through a composite process flow of continuous equal-channel angle extrusion technology, and finally obtains high-strength nano-copper through a drawing process flat line. Coarse-grained copper rod blanks prepared by smelting-uplinking are driven by rollers to push the copper rod blanks into the continuous ECAP mold, and the copper rod blanks pass through the cavity of the continuous equal-channel mold driven by the continuous ECAP driving rollers , when the blank passes through the mold cavity, the material undergoes pure shear deformation, without changing the cross-sectional area of ​​the material, the high strengthening and nanonization of the severe plastic deformation of the material are achieved, and it can be achieved by increasing the continuous ECAP cavity The number realizes the accumulation of equivalent strain, and can produce high-strength nano-copper flat wires with nano-equiaxed structures with different degrees of grain refinement.

Description

technical field [0001] The invention relates to a method for preparing high-strength copper flat wire, which combines smelting with efficient up-drawing continuous casting technology, through a composite process flow of continuous equal-channel angle extrusion technology, and finally obtains high-strength nano-copper through a drawing process flat line. Background technique [0002] my country's high-speed railway construction has entered a period of rapid development. From 2004 to the end of 2015, the operating mileage has reached 19,000 kilometers, which has become the first in the world. Therefore, the rapid development of high-speed rail puts forward higher requirements on the mechanical properties of my country's catenary conductors. Due to the excellent performance of copper wire material, it is the preferred material in many aspects. In addition, the traction transformer windings of high-speed trains put forward higher requirements for copper flat wires, which has m...

Claims

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Application Information

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IPC IPC(8): H01B13/00B22D11/14
CPCH01B13/00B22D11/145
Inventor 徐淑波张小东徐爱青刘鹏范小红林晓娟
Owner SHANDONG JIANZHU UNIV
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