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Solid solution aging technique for modifying Cu-Ag alloy rigidity and electric conductivity

A technology of solution aging and electrical conductivity, applied in the field of heat treatment of copper-based alloys, to achieve the effect of easy implementation and simple process

Active Publication Date: 2008-07-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these heat treatment techniques are limited to homogenization annealing, intermediate heat treatment and final heat treatment, and their good effects must be reflected in the processing and deformation process, requiring the structure to be a complex multi-phase fiber composite form, which does not involve optimizing the original cast state. performance improvement techniques

Method used

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  • Solid solution aging technique for modifying Cu-Ag alloy rigidity and electric conductivity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The metal Ag and electrolytic Cu are mixed according to the mass percentage, among which the metal Ag is 5%, and the rest is electrolytic Cu. First, Cu is placed in a vacuum induction furnace, melted at an atmospheric pressure lower than 0.1Pa, and degassed at 1150°C. Then fill the furnace with Ar to 450kPa, then add Ag and melt it, electromagnetically stir it evenly and let it stand for 2-3 minutes, then cast it into a plate-shaped ingot of 16×42×170mm.

[0025] The ingot is solid solution treated by isothermal water cooling at 730°C / 8h+760°C / 4h.

[0026] The solution-treated ingots were aged at 350°C for 2 hours and subjected to isothermal air-cooling treatment.

[0027] After the above processing and heat treatment, the Vickers hardness reaches 111, and the relative conductivity reaches 85% IACS change (see Figure 1 and Figure 2).

Embodiment 2

[0029] Metal Ag and electrolytic Cu are mixed according to mass percentage, wherein the metal Ag is 6%, and the rest is electrolytic Cu. The ingot smelting and casting process are the same as in Example 1.

[0030] The ingot is solution treated by isothermal water cooling at 730°C / 8h+760°C / 8h.

[0031] The solution-treated ingots were aged at 350°C for 24 hours and subjected to isothermal air-cooling treatment.

[0032] After the above processing and heat treatment, the Vickers hardness reaches 116, and the relative electrical conductivity reaches 96% IACS (see Figure 1 and Figure 2).

Embodiment 3

[0034] Metal Ag and electrolytic Cu are mixed according to mass percentage, wherein the metal Ag is 6.5%, and the rest is electrolytic Cu. The ingot smelting and casting process are the same as in Example 1.

[0035] The ingot is solid solution treated by isothermal water cooling at 730°C / 8h+780°C / 4h.

[0036] The solution-treated ingots were aged at 450°C for 2 hours and subjected to isothermal air-cooling treatment.

[0037] After the above processing and heat treatment, the Vickers hardness reaches 130, and the relative electrical conductivity reaches 90% (see Figure 1 and Figure 2).

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Abstract

The invention discloses a solid solution aging process whose cuprum-argent alloy hardness and conductivity are improved. Metal argent whose mass percentage is 5-7 percent and other burden which is electrolytic cuprum are melted in a vacuum induction furnace and are poured into ingots under the protection of argon gas, through the solid solution in 730 DEG C / 8 hours and in 760-780 DEG C / 4-8 hours and the aging of 350-450 DEG C / 2-24 hours, the Vickers hardness of cast alloy is capable of being reached to 110-130 DEG C, and the relative conductivity is reached to 85-96 percent of International Annealed Copper Standard. The invention increases the alloy hardness and relative conductivity of casting cuprum-5-7 percent of argent through the solid solution aging, the process is simple, the performance level is higher than cuprum-24 percent of argent, and the cost of raw materials is reduced.

Description

technical field [0001] The invention relates to a heat treatment technology of a copper-based alloy. In particular, it relates to a solid solution aging process for improving the performance of Cu-Ag alloy. Background technique [0002] Conductor alloys used in high-tech fields have extremely high requirements on strength, hardness and conductivity, but the hardness and conductivity of conductor alloys generally have an inverse function relationship, that is, if specific technologies are used to increase hardness, the conductivity is often sacrificed. The price, or the hardness is often lost in order to improve the conductivity. Therefore, it is very necessary to adopt a specific technology to obtain good hardness and electrical conductivity at the same time, so as to meet the performance of use. The fiber phase composite reinforced Cu-Ag alloy currently being developed shows excellent hardness and electrical conductivity, and is expected to become a preferred conductor ma...

Claims

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Application Information

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IPC IPC(8): C22F1/08
Inventor 孟亮姚大伟
Owner ZHEJIANG UNIV
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