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Composite bar and preparation method and application thereof

A composite rod and alloy technology, applied in the field of copper alloy powder metallurgy and non-ferrous metal processing

Active Publication Date: 2021-01-26
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the Chinese patent application number 201711270364.1 discloses a composite rod made of dispersion-strengthened copper alloy by powder metallurgy. This composite material is suitable for brazing on the outer layer, but it is powerless for the workpiece that needs to be brazed at the core.

Method used

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  • Composite bar and preparation method and application thereof
  • Composite bar and preparation method and application thereof

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preparation example Construction

[0040] The present invention also provides a method for preparing the composite rod described in the above technical solution, comprising the following steps:

[0041] Mixing copper-aluminum alloy powder and cuprous oxide to obtain a mixture;

[0042] Fixing the oxygen-free copper rod in the center of the cold isostatic pressing mold, uniformly filling the mixture around the oxygen-free copper rod, and performing cold isostatic pressing to obtain a cold isostatic pressing composite billet;

[0043] The cold isostatic pressing composite billet is sequentially subjected to heat treatment, hot extrusion compounding and drawing straightening to obtain the composite rod;

[0044] The heat treatment includes sequential internal oxidation, reduction and sintering.

[0045] In the present invention, unless otherwise specified, all raw materials are commercially available products of resins by those skilled in the art.

[0046] The invention mixes the copper-aluminum alloy powder and...

Embodiment 1

[0062] Water-atomized copper-aluminum alloy powder with a particle size of -100 mesh (the mass percentage of Al is 0.1%) and commercially available cuprous oxide are produced according to the Al and O reaction. 2 o 3 The ratio and according to the excess coefficient of O is 0.8 to mix 4h, the mixing is carried out in a double-cone mixer to obtain a mixture;

[0063] Be that the diameter is 25mm, the oxygen-free copper rod that brand is TU2 is fixed in the center of the mold for cold isostatic pressing, then the mixture is evenly filled around the oxygen-free copper rod, and the mold is tightly plugged with a rubber stopper. The metal wire is tightly sealed to prevent the pressurized medium liquid from penetrating into the powder. Place the installed mold in a cold isostatic press for compression molding. The pressure of cold isostatic pressing is 200 MPa, and the pressure holding time is 8 minutes. After three-stage pressure relief is used for pressure relief, a cold isostati...

Embodiment 2

[0069] Water-atomized copper-aluminum alloy powder with a particle size of -100 mesh (the mass percentage of Al is 1.2%) and commercially available cuprous oxide are produced according to the Al and O reaction. 2 o 3 The ratio and according to the excess coefficient of O is 1.3 to carry out mixing 10h, and described mixing is carried out in double-cone mixer, obtains mixture;

[0070] The diameter is 40mm, and the oxygen-free copper rod that brand is TU0 is fixed on the center of the mold for cold isostatic pressing, and then the mixture is evenly filled around the oxygen-free copper rod, and the mold is tightly plugged with a rubber stopper. The metal wire is tightly sealed to prevent the pressurized medium liquid from penetrating into the powder. Place the installed mold in a cold isostatic press for compression molding. The pressure of cold isostatic pressing is 240 MPa, and the holding time is 12 minutes. After three-stage pressure relief is used for pressure relief, a co...

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Abstract

The invention relates to the technical field of copper alloy powder metallurgy and non-ferrous metal processing, in particular to a composite bar and a preparation method and application thereof. Thecomposite bar comprises a core part and a jacket; the core part is made of oxygen-free copper; and the jacket is made of aluminum oxide dispersion strengthened copper alloys. According to the composite bar, the excellent characteristics of high strength, high conductivity, high-temperature softening resistance and the like of the aluminum oxide dispersion strengthened copper alloys and the good brazing performance of the oxygen-free copper are organically combined to form advantage complementation, so that the composite bar has the excellent characteristics of high strength, high conductivity,high-temperature softening resistance and the like and the good brazing performance at the same time.

Description

technical field [0001] The invention relates to the technical fields of copper alloy powder metallurgy and non-ferrous metal processing, in particular to a composite rod and its preparation method and application. Background technique [0002] Dispersion strengthened copper alloy is a kind of copper alloy material formed by uniformly dispersing ceramic particles with high melting point, high hardness, good thermal stability and chemical stability in the copper matrix. Compared with other strengthening methods, the strengthening particles of dispersion strengthening do not dissolve and grow at high temperature, and have a strong hindering effect on dislocation movement and grain boundary migration, which significantly improves the strength and high temperature softening resistance of the material. At the same time, the effect of particles on free electron scattering is small, so the conductivity of the copper matrix will not be significantly reduced. The application of dispe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C1/10C22C9/00C22F1/02C22F1/08
CPCC22C1/05C22C1/1084C22C9/00C22F1/08C22F1/02C22C1/1089
Inventor 李增德李卿彭丽军米绪军解浩峰张习敏黄树晖张文婧杨振刘冬梅谢忠南
Owner GRIMAT ENG INST CO LTD
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