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Technology of heat treatment for controlling performace matching of complex phase fibre enhancing copper silver alloy

A technology for strengthening copper and silver alloys, applied in the field of heat treatment of copper-based alloys, can solve the problems of lack of electrical conductivity, inability to obtain a reasonable matching relationship between strength and electrical conductivity, and inability to use strength, etc., to achieve easy implementation, low degree of deformation, The effect of reducing alloy cost

Inactive Publication Date: 2005-01-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this change relationship is only for the behavior of materials at different loading temperatures, and it cannot be used to control the final strength of the product. At the same time, it lacks changes in electrical conductivity, and it is impossible to obtain a reasonable matching relationship between strength and electrical conductivity.

Method used

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  • Technology of heat treatment for controlling performace matching of complex phase fibre enhancing copper silver alloy
  • Technology of heat treatment for controlling performace matching of complex phase fibre enhancing copper silver alloy
  • Technology of heat treatment for controlling performace matching of complex phase fibre enhancing copper silver alloy

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The purity of 99.95% and 99.90% of Ag and electrolytic Cu are mixed in the proportion of 12% Ag, pickled and thoroughly cleaned, and then dried. First, the electrolytic Cu is placed in a vacuum induction furnace and melted under an atmospheric pressure of less than 0.1Pa After standing for degassing at 1100~1200℃, the furnace is filled with Ar to 40~50kPa and then pure Ag is added and melted. After electromagnetic stirring and standing, it is poured into a rod-shaped casting billet of specific diameter for 2~3min. The ingot mold adopts a cast iron mold, a copper mold or a water-cooled mold with good cooling conditions.

[0032] After the blank is homogenized at 720℃ / 4h, the surface is turned to remove the defects, and then deformed by the following steps: 7 passes of cold drawing to the degree of deformation η=1.3→400℃ / 1h annealing → 5 passes of cold drawing to η= 2.0→380℃ / 1h annealing→5 pass cold drawing to η=2.8→360℃ / 1h annealing→10 pass cold drawing to η=5.1.

[0033] Af...

Embodiment 2

[0037] Prepare the alloy wire cold drawn to η=5.1 according to the processing method of Example 1, and then process the wire to η=7.0 and reduce the diameter to 0.6mm after 10 passes of cold drawing. Figure 4 The fiber-reinforced phase distribution pattern shown corresponds to the initial state tensile strength of 1040MPa, and the relative conductivity is 73%IACS.

[0038] The alloy wires with this initial performance level are divided into 7 batches, and each batch of samples is heat treated at different temperatures according to the heat treatment method of Example 1. After the heat treatment is completed, the alloy wire is tested for tensile and resistivity, and the relationship between the tensile strength and the heat treatment temperature is as follows: Figure 5 As shown, the tensile strength can be adjusted between 1040~300MPa; the relative conductivity changes with the heat treatment temperature as Figure 6 As shown, the relative conductivity can be adjusted between 73% ...

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Abstract

The invention discloses a heat treating process of control the property matching of composite fiber reinforced Cu-Ag alloy, making vacuum melting, casting, at-702 deg.C / h homogenization treatment on the alloy in mass ratio of pure Ag to electrolytic Cu 12 : 88, making cold drawing to deformation degree eta = 5.1-7.0, and during cold-drawing, making at-400 deg.C / h, at-380 deg.C / h and at-360 deg.C / h middle heat treatment ateta = 1.3, 2.0 and 2.8, respectively, so as to obtain wire material with diameter 1.6-0.6 mm and prolonged fiberlike distributed tissue, and making the final heat treatment of preserving heat for 1 h at 20-60 deg.C. The invention can control tensile strength at 1040-220 MPa and relative electric conductivity in range of 73%-93% IACS, and enlarges the application range of the material; it is easy to implement; needs no fiberizing treatment course of material structureat extremely high deformation degree; in medium-Ag content alloy, it can make the property reach the level of higher-Ag content alloy.

Description

Technical field [0001] The invention relates to a heat treatment technology for copper-based alloys. In particular, it relates to a heat treatment process for controlling the performance matching of a multiphase fiber reinforced copper-silver alloy. Background technique [0002] Conductor alloys used in related high-tech fields have extremely high requirements for strength and conductivity. However, the strength, hardness and conductivity of conductor alloys are generally inversely related, that is, if a specific technology is simply used to increase the strength, it is often sacrificed At the expense of conductivity, or to improve conductivity, strength is often lost. Therefore, it is very necessary to adopt a specific technology to control and adjust the matching relationship between the strength of the conductor alloy and the electrical conductivity to meet the service performance under different conditions. [0003] The composite fiber-reinforced copper alloy prepared by addi...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C9/00C22F1/08
Inventor 孟亮刘嘉斌张雷
Owner ZHEJIANG UNIV
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