Short process preparation method of high-strength high-conductivity deformation-processed Cu-Cr-Ag in-situ composite material

An in-situ composite material, short process technology, applied in the field of preparation of non-ferrous metal materials, can solve the problems of unstable comprehensive performance of materials, large thermal and cold deformation strain, poor fiber continuity, etc., to achieve stable use of comprehensive performance, The effect of reducing the amount of cold deformation strain and improving the electrical conductivity

Active Publication Date: 2017-05-31
NANCHANG INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned analysis of the existing deformation Cu-Cr system in-situ composite material preparation method shows that the method is complicated in process, long in process, large in thermal and cold deformation strain, the cross-sectional size of the final material is small, and the fiber continuity is poor. Unstable overall performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Weigh 6% of pure chromium, 0.008% of pure silver and the rest of pure copper according to the mass percentage, put them into an intermediate frequency induction furnace for melting and cast them into ingots with graphite molds;

[0017] (2) Put the ingot into Al with a purity of 99.99% and an inner layer coated with a high-temperature resistant inert coating 2 o 3 In the two-way ceramic tube, put the ceramic tube into the regional melting-directional solidification furnace, and melt it in a high-purity argon atmosphere of 300Pa through a high-frequency induction power supply. After melting, the alloy melt is drawn together with the ceramic tube on the base and Under the action of the mechanism, it moves downward at a speed of 50 μm / s and is simultaneously cooled by the gallium-indium alloy liquid to form a directional solidified ingot;

[0018] (3) The directionally solidified ingot is subjected to multi-pass cold drawing deformation at room temperature, and the to...

Embodiment 2

[0022] (1) Weigh 15% of pure chromium, 0.06% of pure silver and the rest of pure copper according to the mass percentage, put them into an intermediate frequency induction furnace for melting and cast them into ingots with graphite molds;

[0023] (2) Put the ingot into Al with a purity of 99.99% and an inner layer coated with a high-temperature resistant inert coating 2 o 3 In the two-way ceramic tube, the ceramic tube is put into the regional melting-directional solidification furnace, and smelted in a high-purity argon atmosphere of 350Pa through a high-frequency induction power supply. After melting, the alloy melt is drawn together with the ceramic tube on the base and Under the action of the mechanism, it moves downward at a speed of 100 μm / s and is simultaneously cooled by the gallium-indium alloy liquid to form a directional solidified ingot;

[0024] (3) The directionally solidified ingot is subjected to multi-pass cold drawing deformation at room temperature, and th...

Embodiment 3

[0028] (1) Weigh 20% of pure chromium, 0.12% of pure silver and the rest of pure copper according to the mass percentage, put them into an intermediate frequency induction furnace for melting and cast them into ingots with graphite molds;

[0029] (2) Put the ingot into Al with a purity of 99.99% and an inner layer coated with a high-temperature resistant inert coating 2 o 3 In the two-way ceramic tube, the ceramic tube is put into the regional melting-directional solidification furnace, and smelted in a high-purity argon atmosphere of 350Pa through a high-frequency induction power supply. After melting, the alloy melt is drawn together with the ceramic tube on the base and Under the action of the mechanism, it moves downward at a speed of 200 μm / s and is simultaneously cooled by the gallium-indium alloy liquid to form a directional solidified ingot;

[0030] (3) The directionally solidified ingot is subjected to multi-pass cold drawing deformation at room temperature, and th...

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Abstract

The invention discloses a short process preparation method of a high-strength high-conductivity deformation-processed Cu-Cr-Ag in-situ composite material. The short process preparation method comprises the following steps: (1) a Cu-Cr-Ag ternary alloy cast ingot is cast by adopting a method combining medium-frequency induction melting and graphite mould pouring; (2) the cast ingot is placed in a zone melting-directional solidification furnace for directional solidification treatment, so that Cr dendritic crystals form directionally arrayed micro nanoscale fiber in the axial direction; (3) a material subjected to the directional solidification treatment is subjected to multipass cold drawing deformation, so that the micro nanoscale fiber formed in a directional solidification process is further refined to be nanoscale fiber; and (4) comprehensive regulation on the strength, the conductivity, the elongation percentage, and the like of the material is carried out by adopting final aging heat treatment. The continuous directionally arrayed micro nanoscale fiber is formed through as-cast structure control, with the combination of the cold drawing deformation, alloying and the final aging heat treatment, the preparation technological process is shortened, the cold deformation strain capacity is reduced, the size of the final material is increased significantly, the final material can acquire stable and good use comprehensive performances, and the application scope of the deformation-processed Cu-based in-situ composite material can be widened in the field of high and new technologies.

Description

technical field [0001] The invention belongs to the technical field of preparation of non-ferrous metal materials, in particular to a short-flow preparation method of large-size, high-strength, high-conductivity deformation Cu-Cr-Ag in-situ composite material. Background technique [0002] The development of modern science and technology has put forward higher and higher requirements for the performance of conductive materials. In many applications such as high-intensity magnetic field coils, large-scale integrated circuit lead frames and high-speed electrified railway contact wires, not only conductive materials are required to have high Electrical conductivity also requires the material to have high tensile strength and elongation. At present, the deformation in-situ composite method is the most ideal method to prepare high-strength and high-conductivity Cu-based materials. It forms the second phase in-situ in the as-cast alloy through melting and casting technology, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22F1/08
CPCC22C9/00C22F1/08
Inventor 刘克明陆德平黄志开张兴旺陈志宝尹懿陆磊
Owner NANCHANG INST OF TECH
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