Liquid-phase sintering method for preparing high-melting-point hard material particle dispersion-strengthened copper-based composite material and electromagnetic sintering device

Abstract

The invention discloses a liquid-phase sintering method for preparing high-melting-point hard material particle dispersion-strengthened copper-based composite materials, which comprises the preparation of mixed powder, the preparation of copper-based composite material preforms, liquid-phase sintering and densification under a constant magnetic field. The high-strength copper-based composite billet cooling consists of four main steps. The liquid-phase sintering is used to obtain the highest strength and density of the copper-based composite material. At the same time, a constant magnetic field is used to enhance the viscosity of the copper melt in the liquid-phase sintering. The Lorentz force suppresses the movement of high-melting-point hard material particles in copper liquid, prevents the agglomeration and delamination of high-melting-point hard material particles, and thus prepares high-strength and high-conductivity copper alloy blanks with better mechanical properties and electrical conductivity Ingot, the present invention also provides a high-strength and high-conductivity copper alloy sintering device, including a heating and heat preservation device, an atmosphere control device and a constant magnetic field generating device, which can realize the technical goal of both high strength and high conductivity of copper-based composite materials, and realize Huge industrial application value.

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 ...

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