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Method for preparing high-smelting-point hard particle dispersion strengthened copper-base composite material by liquid-phase sintering and electromagnetic sintering device

A technology of hard material particles and copper-based composite materials, which is applied in the field of powder metallurgy preparation methods and sintering devices of copper-based composite materials, can solve the problems of easily polluted interface of composite materials, inability to stably control the production process, complicated processes, and the like. Achieve the effect of low cost, increase effective viscosity and simple process

Active Publication Date: 2013-12-18
SHANGHAI UNIV +1
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  • Application Information

AI Technical Summary

Problems solved by technology

The method is complicated, the interface of the composite material is easily polluted, and the production process cannot be stably controlled

Method used

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  • Method for preparing high-smelting-point hard particle dispersion strengthened copper-base composite material by liquid-phase sintering and electromagnetic sintering device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this example, alumina powder is used as the high melting point hard material for dispersion strengthening, and copper alloy is used to prepare copper-containing powder to make Cu-Al 2 o 3 Powder metallurgy is carried out on the prefabricated powder round billet to prepare a dense high-strength copper-based composite material billet of copper alloy dispersion-strengthened by high-melting-point hard material particles.

[0028] In this example, see figure 1 , the electromagnetic sintering device for the method of preparing high-melting-point hard material particles dispersion-strengthened copper-based composite material by liquid-phase sintering is composed of a heating and heat preservation device, an atmosphere control device and a constant magnetic field generating device 10, specifically:

[0029] The heating and heat preservation device is composed of a stainless steel furnace body 11, a crucible 5, a refractory fiber 6, a heating element 4, a temperature control...

Embodiment 2

[0034] This embodiment is basically the same as Embodiment 1, especially in that:

[0035] In this example, the copper powder and micro-alumina powder prepared in the above-mentioned Example 1 are replaced with copper powder with dispersed distribution of nano-alumina prepared by the internal oxidation method, without powder mixing, and directly pressed into a compact, and then the above-mentioned In the same liquid-phase sintering process as in Example 1, the magnetic induction intensity is controlled to 16T, the liquid-phase sintering temperature is 1100°C, and the temperature is kept at 10 hours, then a high-strength and high-conductivity copper alloy billet with nano-alumina dispersion strengthening can also be prepared. Then, various nano-alumina dispersion-strengthened copper alloy rods, pipes, plates or wires can be prepared by conventional rolling and drawing processes, and have excellent strength and electrical conductivity.

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Abstract

The invention discloses a method for preparing a high-smelting-point hard particle dispersion strengthened copper-base composite material by liquid-phase sintering. The method is composed of four main steps of preparing mixed powder, preparing a copper-base composite material pre-fabricated blank, carrying out liquid-phase sintering under a stable and constant magnetic field and cooling a dense high-strength copper-base composite material billet. The liquid-phase sintering is used for endowing the copper-base composite material with the highest strength and density; meanwhile, the constant magnetic field is used for improving the viscosity of a copper melt in the liquid-phase sintering; a magnetic field force and a Lorentz force are used for inhibiting the movement of high-smelting-point hard material particles in copper liquid and preventing clustering and layering of the high-smelting-point hard material particles so as to prepare a high-strength and high-conductivity copper alloy billet with excellent mechanical property and conductivity. The invention further provides a high-strength and high-conductivity copper alloy sintering device which comprises a heating and heat insulation device, an atmosphere control device and a stable and constant magnetic field generation device. According to the invention, the technical target of guaranteeing the high strength and the high conductivity of the copper-base composite material can be reached and a great industrial application value is realized.

Description

technical field [0001] The invention relates to a metal-based composite material preparation process and equipment, in particular to a copper-based composite material powder metallurgy preparation method and a sintering device. Background technique [0002] Copper and its alloys are one of the most important functional and structural materials in national economic construction. Their excellent electrical conductivity and corrosion resistance make them widely used in communication, electric power, aerospace, transportation, home furnishing, automation and many other fields. However, the conductivity and strength of copper alloys are a pair of contradictory properties. To improve the strength of copper alloys, it is often at the expense of the conductivity of copper alloys. For example, alloys such as copper-magnesium, copper-tin, copper-chromium, and copper-iron-phosphorus, which are widely used at present, have high strength, but their electrical conductivity can only reach ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C1/05B22F3/16B22F3/10
Inventor 钟云波杨辉李明杰王怀范丽君周鹏伟黄靖文
Owner SHANGHAI UNIV
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