Method for preparing Cu-Cr alloy by means of magnetic field/ultrasonic field coupling

Abstract

The invention discloses a method for preparing Cu-Cr alloy by means of magnetic field / ultrasonic field coupling. The Cu-Cr alloy is obtained by performing dispensing, smelting, casting or continuous casting, and magnetic field and ultrasound filed control over solidification, that is, a structure is controlled to solidify, precipitation is facilitated, and the Cu-Cr alloy is obtained. The method has the advantages that (1) a magnetic field and an ultrasound field are applied simultaneously during solidification, the Cu-Cr alloy is controlled to solidify, Cr dendritic crystals are refined extremely obviously, Cr segregation is reduced, uniform and fine Cr fiber phases are dispersed and distributed in a substrate after materials are subjected to subsequent cold deformation machining, and thestrength of the materials is greatly improved; (2) the magnetic field and the ultrasound field are applied during solidification, precipitation of Cr atoms can be facilitated easily, the solution Cratom content in the Cu substrate is decreased, precipitated phase dispersed distribution is facilitated, accordingly, the electric conductivity of the materials is greatly improved, and the strength of the materials is further improved; and (3) the preparation technology is simple, the cost is low, the comprehensive performance of the materials at the casting stage is improved, and the technological complexity and cost in the subsequent machining forming process are reduced.

Description

technical field [0001] The invention relates to a method for manufacturing nonferrous metal materials, in particular to a method for preparing Cu-Cr alloy by using magnetic field / ultrasonic field coupling. Background technique [0002] High-strength and high-conductivity copper material is a kind of functional material with excellent physical and mechanical properties. It not only inherits the excellent electrical and thermal conductivity of copper, but also has high strength and good plasticity. It is used in integrated circuit lead frames, electrification Electronics, transportation, metallurgical engineering, energy and other fields represented by railway catenary, large generator rotors, and resistance welding electrodes have broad application prospects. Based on the new requirements of copper-based materials constantly raised by the development of modern science and technology, the United States, Japan, Germany and other countries have carried out a lot of related work ...

AI Technical Summary

Problems solved by technology

[0006] In view of the existing problems in the preparation of Cu-Cr deformed in-situ composite materials, the purpose of the present invention is to provide a method for preparing Cu-Cr alloys using magnetic field and ultrasonic field coupling treatment. This method is simple in process and low in cost. Alloy billets with good comprehensive properties can be prepared, which is conducive to obtaining composite materials with excellent strength and electrical conductivity in the subsequent processing and forming process.

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