Method for preparing composite Cu-Fe-Ag nano material at original position with high intensity and high conductance

Abstract

A method of preparing high intensity and high conducting in-situ nano-composite: Cu-Fe-Ag. The steps: (1) Prepare Cu-Fe-Ag by using medium freguency induction furnace to smelt, and dealt it with ultrasonic or strong electric pulse. Make the ingot casting by water-cold Cu-model: (2) Forge the ingot casting and then draw it multiple times in room temperature in order to made Fe-icrostructural elongate by stretch until it forms nano fiber. (3) Heat treatment it when its cold forming process strain quantum is 2 - 3 so the soild-solution of Fe and Al can separate out as natrium rice level particles; (4) In the following forming process , this particles join in distortion, and form the enhanced fiber which particles are smaller than before. This process can make the material enhanced more. The present invention mixes the thinning of as-cast microstructure and deformation together. It increases the electric while enhances the intensity of the materials, and also can obtain materials in large sectional dimension.

Description

technical field [0001] The invention relates to a method for preparing a composite material, in particular to a method for preparing a high-strength and high-conductivity Cu-Fe-Ag nanometer in-situ composite material. Background technique [0002] Generally, the strength and electrical conductivity of copper alloys are a pair of contradictions. High electrical conductivity leads to low strength, and high strength is often obtained at the expense of electrical conductivity. The development of modern technology has put forward higher requirements for the comprehensive performance of copper-based conductive materials. For example, for a 40T magnetic field, the strength of the coil material is required to be not less than 1000MPa, and for a 100T magnetic field, the material strength is required to reach 2400MPa. The deformation in-situ composite material method is the most ideal method for preparing (ultra) high-strength and high-conductivity copper alloys. The reinforcing phase...

AI Technical Summary

Problems solved by technology

[0003] After searching the documents of the prior art, it was found that Song J.S. and Hong S.I. published "Strength and electrical conductivity of Cu-9Fe-1.2Co filamentary microcomposite wires" (Cu-9Fe -1.2 Strength and conductivity of Co microscopic fiber composites, Alloys and Compounds, Volume 311, 2000, p265-269) pointed out that the alloying element Co basically exists in the Fe phase, and the addition of Co has no effect on the conductivity of the material Beneficial effect

In addition, at present, in order to obtain high strength, it is often necessary to carry out a large amount of plastic deformation on the material, and the strain reaches 11-12 or more. Therefore, although the prepared material has relatively high strength, its cross-sectional size is small, and generally cannot be directly applied in industrial production.