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Method for preparing in-situ deformation Cu-Ag composite material by using magnetic field

A composite material and in-situ deformation technology, applied in the field of materials, to achieve the effect of reducing solid solution scattering, reducing solid solubility, and increasing effective strengthening

Active Publication Date: 2011-04-27
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, with the continuous development of electromagnetic field technology, magnetic field technology has been applied in the control of material solidification microstructure. Steady magnetic field or electromagnetic stirring can control the convection in the melt, refine the solidification structure, and control the diffusion of solute and reduce the composition. segregation, and the existing literature does not involve the preparation of Cu-Ag composite materials under the action of steady magnetic field or electromagnetic stirring

Method used

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  • Method for preparing in-situ deformation Cu-Ag composite material by using magnetic field
  • Method for preparing in-situ deformation Cu-Ag composite material by using magnetic field
  • Method for preparing in-situ deformation Cu-Ag composite material by using magnetic field

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Using oxygen-free copper and electrolytic silver as raw materials, Cu-Ag alloy liquid is produced after smelting. The composition of Cu-Ag alloy liquid is Ag 6% by weight percentage, and the balance is Cu;

[0030] Put the Cu-Ag alloy liquid in a vacuum resistance furnace, heat the Cu-Ag alloy liquid to 1200 ° C, keep it for 1 hour, and then cool it with the furnace to obtain the cast Cu-Ag alloy; during the process of heat preservation and cooling with the furnace, Apply a steady magnetic field with a magnetic induction intensity of 1T to the vacuum resistance furnace;

[0031] The as-cast Cu-Ag alloy is kept at 850°C for 0.5 hours, and then hot forged at 650~850°C to make a deformed Cu-Ag alloy, and the area reduction rate is controlled to 10%;

[0032] Draw the deformed Cu-Ag alloy at room temperature, keep the drawing direction perpendicular to the hot forging direction, and make a deformed Cu-Ag composite material, and control the total area reduction rate to 65%; ...

Embodiment 2

[0037] Oxygen-free copper and electrolytic silver are used as raw materials, and Cu-Ag alloy ingots are made by cooling after smelting; the composition of Cu-Ag alloy ingots is Ag 14% by weight percentage, and the balance is Cu;

[0038] Place the Cu-Ag alloy ingot in a vacuum resistance furnace, heat the Cu-Ag alloy ingot to 980°C, hold it for 0.3 hours, and then cool it with the furnace to obtain the cast Cu-Ag alloy; during the process of heat preservation and cooling with the furnace, Apply a steady magnetic field with a magnetic induction intensity of 20T to the vacuum resistance furnace;

[0039] The as-cast Cu-Ag alloy was kept at 800°C for 0.8 hours, and then hot forged at 650-850°C to produce a deformed Cu-Ag alloy with a controlled area reduction rate of 9%;

[0040] Draw the deformed Cu-Ag alloy at room temperature, keep the drawing direction perpendicular to the hot forging direction, and make a deformed Cu-Ag composite material, and control the total area reductio...

Embodiment 3

[0045] Oxygen-free copper and electrolytic silver are used as raw materials to produce Cu-Ag alloy liquid after smelting. The composition of Cu-Ag alloy liquid is Ag25% by weight percentage, and the balance is Cu;

[0046] Put the Cu-Ag alloy liquid in a vacuum resistance furnace, heat the Cu-Ag alloy liquid to 960°C, keep it for 0.05 hours, and then cool it with the furnace to obtain the cast Cu-Ag alloy; during the process of heat preservation and furnace cooling, Apply a steady magnetic field with a magnetic induction intensity of 12T to the vacuum resistance furnace; the macroscopic photo of the cast Cu-Ag alloy is as follows figure 2 shown;

[0047] Keep the cast Cu-Ag alloy at 750°C for 1 hour, then hot forge at 650-850°C to make a deformed Cu-Ag alloy, and control the area reduction rate of the deformed Cu-Ag alloy to 5%;

[0048] Draw the deformed Cu-Ag alloy at room temperature, keep the drawing direction perpendicular to the hot forging direction, and make a deform...

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Abstract

The invention relates to a method for preparing an in-situ deformation Cu-Ag composite material by using a magnetic field, belonging to the technical field of materials and comprising the following steps of: 1, with oxygen-free copper and electrolyzed silver as raw materials, preparing a Cu-Ag alloy liquid or Cu-Ag alloy ingot; 2, placing the Cu-Ag alloy liquid or Cu-Ag alloy ingot into a vacuum electric furnace, preserving the temperature and then cooling with the furnace, applying a static magnetic field or alternating-current magnetic field to obtain an as-cast Cu-Ag alloy; 3, preserving the temperature of the as-cast Cu-Ag alloy and then thermally forging to prepare a deformation Cu-Ag alloy; 4, drawing the formation Cu-Ag alloy to prepare a deformation Cu-Ag composite material; 5, thermally treating the deformation Cu-Ag composite material in vacuum, then drawing again; and 6, sequentially repeating the step 5 to obtain the in-situ deformation Cu-Ag composite material. The method provided by the invention effectively improves the ultimate tensile strength and the electric conductivity of the Cu-Ag alloy; and the prepared composite material has greatly improved property.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for preparing in-situ deformed Cu-Ag composite materials by using a magnetic field. Background technique [0002] High-strength and high-conductivity Cu-based composite materials are mainly used in the fields of high-speed train contact wires, integrated circuit lead frame materials, high-pulse magnet coils, and electrical contact materials. They are structural and functional materials with a good combination of strength and conductivity. However, during the processing of such materials, the electrical conductivity usually decreases significantly with the increase of strength. How to enhance the strength of materials while maintaining high electrical conductivity is the key to the research of this type of materials. Existing studies mainly choose to add transition group elements with low solid solubility, such as bcc metals such as Nb, Cr, and Fe, and fcc m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/08C22C9/00B22D27/02
Inventor 王恩刚张林李贵茂左小伟赫冀成
Owner NORTHEASTERN UNIV
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