Preparation method for Cu-Ag alloy with high-strength and high-conductivity performance

A high-conductivity, high-strength technology, applied in the direction of conductive materials, conductive materials, metal/alloy conductors, etc., can solve problems such as limited application fields, achieve the effects of expanding application fields, high strength and conductivity, and improving preparation levels

Active Publication Date: 2017-05-17
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of the current preparation methods, the existing high-performance Cu-Ag alloy materials are mainly small-sized samples such as filaments and thin strips, which greatly limits the application fields of this material.

Method used

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  • Preparation method for Cu-Ag alloy with high-strength and high-conductivity performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Cu-12Ag alloy

[0021] Prepare Cu-12Ag alloy, comprises the steps:

[0022] (1) solid-liquid two-phase solidification and semi-solid casting: using pure copper ingots, pure silver ingots, and pure copper powder as raw materials, its composition includes 86wt% pure copper ingots, 2wt% pure copper powders and 12wt% pure silver ingots; The particle diameter of the pure copper powder mentioned therein is 0.5 μm, and its surface oxide is removed through reduction treatment. First, mix pure copper ingots and pure silver ingots and heat them to 1100°C to melt them into an alloy melt. After holding for 10 minutes, use argon to protect the melt surface and add pure copper powder to the alloy melt. Then, the alloy melt was fully stirred for 3 minutes by means of mechanical stirring, and at the same time, the temperature of the alloy melt was lowered to 880°C and kept warm, so that the alloy melt was rapidly partially solidified and a semi-solid mixed structure was ...

Embodiment 2

[0028] Embodiment 2: Cu-2Ag alloy

[0029] Prepare Cu-2Ag alloy, comprises the steps:

[0030] (1) Solid-liquid two-phase solidification and semi-solid casting: using pure copper ingots, pure silver ingots, and pure copper powder as raw materials, according to the main components: 97wt% pure copper ingots, 1wt% pure copper powder, and 2wt% pure silver ingots, The particle diameter of the pure copper powder mentioned therein is 100 μm, and its surface oxide is removed through reduction treatment. First, mix pure copper ingots and pure silver ingots and heat them to 1200°C to melt them into an alloy melt. After holding for 10 minutes, use argon to protect the melt surface and add pure copper powder to the alloy melt. Then, the alloy melt was fully stirred for 5 minutes by mechanical stirring, and at the same time, the temperature of the alloy melt was lowered to 1100°C and kept warm, so that the alloy melt was rapidly partially solidified and a semi-solid mixed structure was fo...

Embodiment 3

[0036] Embodiment 3: Cu-6Ag alloy

[0037] Prepare Cu-6Ag alloy, comprises the steps:

[0038] (1) Solid-liquid two-phase solidification and semi-solid casting: using pure copper ingots, pure silver ingots, and pure copper powders as raw materials, according to the main components: 92wt% pure copper ingots, 2wt% pure copper powders, 6wt% pure silver ingots, The particle diameter of the pure copper powder mentioned therein is 0.05 μm, and its surface oxide is removed through reduction treatment. First, mix pure copper ingots and pure silver ingots and heat them to 1120°C to melt them into an alloy melt. After holding the heat for 10 minutes, use argon to protect the melt surface and add pure copper powder to the alloy melt. Then, the alloy melt was fully stirred for 5 minutes by means of mechanical stirring, and at the same time, the temperature of the alloy melt was lowered to 1060 ° C and kept warm, so that the alloy melt was rapidly partially solidified and a semi-solid mix...

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Abstract

The invention discloses a preparation method for Cu-Ag alloy with high-strength and high-conductivity performance and belongs to the technical field of copper alloy materials. The preparation method comprises the following specific steps that through the solid-liquid double-phase solidification combination semi-solid state casting technique, a great number of Ag oversaturation solid solutions are formed in as-cast structures, and the as-cast microstructures are refined; and further, by combing the multi-direction high-temperature and low-temperature forging + combining ageing technique, distribution of the ageing precipitated phase of the alloy is improved, and thus a product of the Cu-Ag alloy with high-strength and high-conductivity performance and the large size being phi 10-100 mm. The yield strength of the alloy can reach 600-1100 MPa, and the conductivity can reach 75-100% IACS (international annealed copper standard).

Description

technical field [0001] The invention belongs to the technical field of preparation of copper alloy materials. Particularly relate to a kind of preparation method of Cu-Ag alloy with high strength and high electrical conductivity, Background technique [0002] With the development of science and technology and industry, high-intensity magnetic field systems, lead frames, high-speed railways, aerospace and many other fields have higher and higher requirements for conductor materials, which not only require conductive materials to have excellent conductivity, but also must have high Strength of. High-strength and high-conductivity Cu-Ag alloy is a two-phase in-situ composite metal material. After severe plastic deformation, the eutectic phase or precipitated phase evolves into a nano-sized fiber-reinforced phase, so that the alloy obtains high strength while maintaining excellent It is one of the most widely used high-performance copper alloy materials. The content of Ag in ...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/02C22F1/08H01B1/02
CPCH01B1/026C22C1/02C22C9/00C22F1/08C22C1/12
Inventor解国良王强松刘冬梅刘芳苑伟张嘉凝
OwnerGRIMAT ENG INST CO LTD