Copper-iron alloy modifier as well as preparation method and use method thereof

Abstract

The invention discloses a copper-iron alloy modifier which is characterized by comprising a modifier A which comprises, in percentage by mass, 15-25wt% of one or more of copper powder, iron powder and yttrium powder, and the balance copper-calcium alloy powder and inevitable impurities; the content of calcium in the copper-calcium alloy powder is 50wt% or above; and the copper-iron alloy modifier further comprises a modifier B which comprises, in percentage by mass: 10-30wt% of Cu, 20-30wt% of one or more of Te, Mg, Ca, Si and La, and the balance of Fe and inevitable impurities. The modifier B and the modifier A can mutually promote the refinement and spheroidization of crystal grains, a copper-iron alloy phase structure with evenly distributed iron phases can be obtained, the copper-iron alloy with Fe smaller than or equal to 90 wt% can be prepared, ultra-fine wires can be conveniently machined, and the problem of iron phase breaking is solved.

Description

technical field [0001] The invention belongs to the technical field of copper alloys, and in particular relates to a method for preparing copper-iron alloys. Background technique [0002] At present, copper-iron alloys have the electrical conductivity, thermal conductivity, ductility, elasticity, etc. of copper, and at the same time have the wear resistance, hardness, magnetism, etc. of iron, as well as their unique high electromagnetic wave shielding properties. The material is a new generation of high-end copper alloy new material, mainly used in high-demand electromagnetic shielding boxes (boards), connectors, lead frames, electronic devices, motor coils and other products, which can meet the high-end requirements of electronic information, aerospace, transportation, etc. Demand, with a wide range of applications and the prospect of replacing old products, the market has a huge potential for use. With the maturity of industrialization, its demand will soar. China is a b...

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Problems solved by technology

Among them, the iron phase morphology control and field distribution of ferroalloys are the necessary and most important links in the preparation of high-iron copper alloys. That is because of the nature of copper and iron, the eutectic point and specific gravity difference, and the iron content is less than 2.5%. Alloys formed by solid solution, with a content of more than 3%, will not undergo solid solution, but will segregate and form alloys, which are difficult to use

Due to the above reasons, the copper-iron alloys that can be used so far are limited. At the same time, for alloys with an iron content below 2.5%, the iron phase morphology is not well controlled, and the iron phase segregation problem occurs. In order to solve the above problems, the promotion of copper-iron alloys should be accelerated. , it is necessary and urgent to develop the iron phase morphology control and field distribution technology of copper-iron alloys

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