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Solid solution and aging treatment method for cooperating Cu-Ag alloy cold drawing processing

An aging treatment and cold drawing technology, applied in the field of copper-based alloy preparation, can solve problems such as heat treatment and deformation processing of the original structure, which have not been involved, and achieve convenient strength and electrical conductivity, high strength and good electrical conductivity matching level , the effect of process simplification

Inactive Publication Date: 2008-09-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these heat treatment techniques are only limited to homogenization annealing, intermediate heat treatment and final heat treatment, and also do not involve the cooperation of original tissue heat treatment and deformation processing.
[0009] In view of the above background technology and existing problems, it can be seen that although the existing public technologies have involved heat treatment, cold processing and performance control of high-strength and high-conductivity Cu-Ag alloys, they are mainly aimed at intermediate heat treatment, finished product heat treatment and these heat treatments. Cooperating with the deformation processing process, it has not yet involved the heat treatment of the original structure, especially the combination of solid solution and aging and deformation processing to improve the performance of fiber phase composite strengthening of Cu-Ag alloys

Method used

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  • Solid solution and aging treatment method for cooperating Cu-Ag alloy cold drawing processing
  • Solid solution and aging treatment method for cooperating Cu-Ag alloy cold drawing processing
  • Solid solution and aging treatment method for cooperating Cu-Ag alloy cold drawing processing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Pickling with a mass fraction of 7% pure silver and 93% electrolytic copper and fully cleaning and drying;

[0026] Put the raw material in a vacuum induction furnace, melt it under the atmospheric pressure of less than 0.1Pa and let it stand for degassing, then fill the furnace with Ar gas to 30kPa, after fully electromagnetic stirring, let it stand for 2 to 3 minutes and cast it into a Φ23×180mm ingot ;

[0027] The ingot was heated and kept in three stages under the protection of reducing atmosphere, the heating rate was 10, 5 and 1°C / min, the heating temperature was 720, 740 and 775°C, and the holding time was 4, 4 and 8 hours respectively. After quenching water cooling;

[0028] Place the solid solution ingot in a furnace at 350°C for 128 hours and then cool with the furnace;

[0029] After turning to remove the surface defects of the ingot, it is drawn in multiple passes at room temperature. When the deformation degree η<3.0, the average deformation degree of t...

Embodiment 2

[0031] Pickling with a mass fraction of 9% pure silver and 91% electrolytic copper was fully cleaned and then dried.

[0032] The ingot smelting and casting process are the same as in Example 1.

[0033] The solid solution process and heating rate are the same as in Example 1. The solid solution heating temperature is 720, 740 and 770°C respectively; the holding time is 2, 2 and 4 hours respectively, and the water is quenched and cooled after holding the heat;

[0034] Place the solid solution ingot in a furnace at 450°C for 32 hours and then cool with the furnace;

[0035] The drawing process is the same as in Example 1.

Embodiment 3

[0037] Pickling with mass fraction of 12% pure silver and 88% electrolytic copper and fully cleaning and drying;

[0038] Ingot smelting and pouring process are the same as embodiment 1;

[0039] The solid solution process and heating rate are the same as in Example 1. The solid solution heating temperature is 720, 740 and 760°C respectively; the holding time is 2, 4 and 8 hours respectively, and the water is quenched and cooled after holding the heat;

[0040] Place the solid solution ingot in a furnace at 550°C for 1 hour and then cool with the furnace;

[0041] The drawing process is the same as in Example 1.

[0042] The tensile strength of the fiber phase composite strengthened Cu-Ag alloy prepared in the above examples can reach 380-1400 MPa under different deformation degrees, and the electrical conductivity can reach (60-92)% IACS (see figure 1 and figure 2 shown), the overall performance reflected from its tensile strength and electrical conductivity matching relat...

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Abstract

The invention discloses a method for solution treatment and aging treatment which are matched with the processing of Cu-Ag alloy cold-finish drawing. A mixture with 7%-12% of Ag by weight and the rest of electrolytic Cu is melted in a vacuum induction furnace and carries out ingoting under the protection of Ar gas, the solution treatment and the aging treatment are carried out to the ingot, and the drawing deformation is carried out several times at the normal temperature. The fiber-phase composite strengthened Cu-(7-12)% Ag alloy obtained by matching the solution treatment and the aging treatment with the deformation processing has the strength of 380-1400MPa and the relative conductivity of (60-92)% IACS. The method simplified the technological process and the combination property of the alloy is close to or even exceeds the alloy with high Ag-content.

Description

technical field [0001] The invention relates to a copper-based alloy preparation technology, in particular to a solid solution and aging treatment method coordinated with Cu-Ag alloy drawing deformation processing. Background technique [0002] The progress of science and technology has higher and higher requirements on the performance of conductor materials. Conventional conductor materials are no longer suitable for increasingly harsh working conditions. Conductor materials with higher strength and good electrical conductivity must be developed to meet the needs. [0003] Often, methods of increasing a material's strength come at the expense of electrical conductivity. Therefore, improving the strength of materials while still maintaining high electrical conductivity or only sacrificing electrical conductivity is the focus of developing new conductor materials. Adding immiscible alloying elements into the Cu matrix and preparing fiber phase composite reinforced copper all...

Claims

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Application Information

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IPC IPC(8): C22F1/08
Inventor 孟亮刘嘉斌刘晶晶
Owner ZHEJIANG UNIV
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