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Ag-Cu in-situ fiber composite material and preparation method thereof

A composite material and fibrous technology, applied in the field of Ag-Cu in-situ fiber composite material and its preparation, can solve the problems of insufficient strength and electrical conductivity, low strength and hardness, etc.

Inactive Publication Date: 2010-02-03
KUNMING INST OF PRECIOUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional Ag-Cu alloy has disadvantages such as low strength and hardness, and its strength and electrical conductivity cannot meet some occasions that require high-strength and high-conductivity materials.

Method used

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  • Ag-Cu in-situ fiber composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Ag-Cu composite material containing 10% Cu by mass fraction. Melted in an intermediate frequency furnace under vacuum, cast into an ingot with a diameter of 80mm in an argon protective atmosphere, annealed at 680°C / 4h and then extruded to 28mm, and cold drawn for multiple passes at room temperature. During the drawing process, 200°C / 1h intermediate heat treatment is carried out at η=2.8. When the deformation is η=8.0, the properties of the obtained wire are: tensile strength is 985MPa, and electrical conductivity is 63%IACS.

Embodiment 2

[0026] Example 2: Ag-Cu composite material containing 10% Cu by mass fraction. Melted in an intermediate frequency furnace under vacuum, cast into an ingot with a diameter of 80mm in an argon protective atmosphere, annealed at 680°C / 4h and then extruded to 28mm, and cold drawn for multiple passes at room temperature. During the drawing process, 300°C / 1h intermediate heat treatment is carried out at η = 2.8. When the deformation is η = 8.0, the properties of the obtained wire are: tensile strength is 800MPa, and electrical conductivity is 72% IACS.

Embodiment 3

[0027] Example 3: Ag-Cu composite material containing 10% Cu by mass fraction. Melted in an intermediate frequency furnace under vacuum, cast into an ingot with a diameter of 80mm in an argon protective atmosphere, annealed at 680°C / 4h and then extruded to 28mm, and cold drawn for multiple passes at room temperature. During the pulling process, 200°C / 1h intermediate heat treatment is carried out at η=2.8, and when the deformation is η=8.0, it is subjected to 200°C / 0.5h stabilization heat treatment. The properties of the obtained wire are: tensile strength 910MPa , the conductivity is 73% IACS.

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Abstract

The invention discloses an Ag-Cu alloy in-situ fibre composite material with high strength, high electrical conductivity and low Cu content and a preparation technology thereof. The Cu content of thecomposite material is equal to or less than 20% by weight percent; the in-situ fiber composite material is formed by utilizing Ag-Cu alloy eutectic structure and adopting great deformation and reasonable heat treatment technology. The preparation technology comprises the following steps: pouring Ag-Cu alloy in the protective atmosphere after vacuum smelting; carrying out hot extrusion, ageing preheat treatment, cold large strain processing, intermediate heat treatment and stabilizing heat treatment to manufacture Ag-Cu composite material with strengthened Cu fiber in the dimensions of micron,submicron or nanometer. Composite material with optimal combination of tensile strength and electrical conductivity performance can be obtained by optimizing various technological parameters in the manufacturing process. The highest performance can reach that the ultimate tensile strength UTS is equal to or greater than 1GPa, and the relative electrical conductivity is equal to or greater than 60%IACS. The Ag-Cu in-situ composite material can be used as conducting material with high strength and high electrical conductivity.

Description

technical field [0001] The invention relates to conductive composite materials, in particular to an Ag-Cu in-situ fiber composite material with high strength and high electrical conductivity, its preparation technology and performance. Background technique [0002] The development of modern science and technology has put forward higher and higher requirements for conductor materials. In many applications, materials not only require high electrical conductivity but also high tensile strength, so new materials with high strength and high electrical conductivity are constantly being developed. Among the conductor materials that have been developed, Cu-based composites prepared by deformation in situ method have attracted more and more attention due to their excellent combination of tensile strength and electrical conductivity. Among them, the deformed Cu-Ag in-situ composite reinforced with fiber phase has the best combination of properties. In the deformation in situ composi...

Claims

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Application Information

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IPC IPC(8): C22C49/14C22C47/00C22F1/14C22C111/00
Inventor 王传军宁远涛张昆华管伟明耿永红
Owner KUNMING INST OF PRECIOUS METALS
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