Preparation method of high-strength silver-copper alloy material

A copper-silver alloy, high-strength technology, applied in the field of alloy materials, can solve the problem that the tensile strength cannot reach 1.1GPa, etc., and achieve the effect of eliminating structural defects, reducing deformation and crack tendency, and eliminating casting shrinkage holes.

Active Publication Date: 2015-07-22
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tensile strength of the CuAg alloy material prepared by this method cannot reach more than 1.1GPa when the electrical conductivity is only 70-71%.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of the high-strength copper-silver alloy material of the present embodiment comprises the following steps:

[0023] 1) Copper with a purity greater than 99.9% and silver with a purity greater than 99.9% are used as raw materials, and the proportion of silver is 15% by mass fraction and the balance is copper;

[0024] 2) Vacuum melting technology is used to prepare Ф80mm copper-silver alloy rods. The specific steps are:

[0025] Put the proportioned copper and silver into the vacuum melting furnace at one time, among which Ag is put into the hopper, and then vacuumize. When the vacuum degree reaches 0.5Pa, start to send power, increase the power, and add when the temperature reaches 1200℃ Silver, and stirring, when the temperature reaches 900 ° C, pouring, cooling to obtain copper-silver alloy bars;

[0026] 3) Using vacuum consumable arc melting technology to refine copper-silver alloy bars;

[0027] a) Loading: Check whether the surface of the ...

Embodiment 2

[0034] The preparation method of the high-strength copper-silver alloy material of the present embodiment comprises the following steps:

[0035] 1) Copper with a purity greater than 99.9% and silver with a purity greater than 99.9% are used as raw materials, and the proportion of silver is 20% by mass fraction and the balance is copper;

[0036] 2) Vacuum melting technology is used to prepare Ф50mm copper-silver alloy rods. The specific steps are:

[0037] Put the proportioned copper and silver into the vacuum melting furnace at one time, among which Ag is put into the hopper, and then vacuumize. When the vacuum degree reaches 0.1Pa, start power transmission, increase the power, and add when the temperature reaches 1200℃ Silver, and stirring to cool down, pouring when the temperature reaches 950 ° C, cooling to obtain copper-silver alloy rods;

[0038] 3) Using vacuum consumable arc melting technology to refine copper-silver alloy bars;

[0039] a) Loading: Check whether th...

Embodiment 3

[0046] The preparation method of the high-strength copper-silver alloy material of the present embodiment comprises the following steps:

[0047] 1) Copper with a purity of more than 99.9% and silver with a purity of more than 99.9% are used as raw materials, and the proportion of silver is 18% by mass fraction, and the balance is copper;

[0048] 2) Prepare Ф60mm copper-silver alloy rods by using vacuum melting technology. The specific steps are:

[0049] Put the proportioned copper and silver into the vacuum smelting furnace at one time, and put the Ag into the hopper, and then vacuumize it. When the vacuum degree reaches 0.3Pa, start to send power, increase the power, and add it when the temperature reaches 1200℃ Silver, and stirring to lower the temperature, pouring when the temperature reaches 930°C, and cooling to obtain copper-silver alloy rods;

[0050] 3) Using vacuum consumable arc melting technology to refine copper-silver alloy bars;

[0051] a) Loading: Check wh...

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Abstract

The invention discloses a preparation method of a high-strength silver-copper alloy material. The method comprises the following steps: 1) taking copper and silver as raw materials, and burdening according to the ratio of 15-20wt% of silver and the balance of copper; 2) preparing a silver-copper alloy bar by adopting a vacuum smelting technology; 3) refining the silver-copper alloy bar by adopting a vacuum consumable arc smelting technology; 4) hot extrusion, wherein the extrusion temperature is 800-900 DEG C; the heat preservation time is 2-4 hours; the extrusion ratio is 8-10, and extruding into the bar; 5) thermal treatment, wherein the annealing temperature is 200-250 DEG C; the heat preservation time is 1-2 hours, cooling along with a furnace; 6) drawing to obtain the high-strength silver-copper alloy material. A silver-copper alloy ingot is refined from the copper and the silver as raw materials in a vacuum consumable smelting furnace; the high-strength silver-copper alloy is obtained by the technologies such as hot extrusion, thermal annealing, drawing and the like. By adopting the silver-copper alloy material prepared by the preparation method disclosed by the invention, the tensile strength can be up to over 1.2 GPa, and the conductivity can be up to over 75% of international annealed copper standard (IACS).

Description

technical field [0001] The invention relates to a preparation method of a high-strength copper-silver alloy material, belonging to the technical field of alloy materials. Background technique [0002] Copper-silver alloy has good thermal conductivity and excellent physical and mechanical properties, and is widely used in high-strength magnet systems, large-scale high-speed turbine generator rotor wires, etc. For a long time, in the research of copper-silver alloys, it has been found that there is a trade-off relationship between the strength and conductivity of copper-silver alloys. It is difficult to increase the tensile strength to above 1.1GPa while maintaining the high conductivity of copper-silver alloys. , so dealing with the relationship between tensile strength and electrical conductivity, and developing a material with both high strength and high electrical conductivity is the focus of research and development by many researchers. [0003] CN101643866A discloses a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/08C22B9/04C22B9/20
Inventor 张彦敏周志红王庆福国秀花宋克兴李红霞贾淑果周延军赵培峰张学宾
Owner HENAN UNIV OF SCI & TECH
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