Rare earth copper and iron alloy and preparation method and application

Abstract

The invention provides a rare earth copper and iron alloy and a preparation method and an application, belonging to the technical field of nonferrous metal materials. The rare earth copper and iron alloy provided by the invention, in percentage by mass, comprises 0.25-0.5% of rare earth elements, 8-20% of Fe and the balance Cu. According to the invention, the rare earth elements are added in the Cu-Fe alloy, functions of purifying the alloy, refining crystalline grains and prompting separation of a Fe phase are realized, and conductivity of the Cu-Fe alloy is improved; in the alloy, content ofan iron element is high, dosage of copper is low, and thus, production cost is reduced; and dosage of the rare earth elements is relatively higher, and thus, affection of the iron element on conductivity of the alloy can be reduced. A result of an embodiment shows that the rare earth copper and iron alloy provided by the invention has conductivity of more than 56% IACS, strength of extension of more than 768 MPa and rate of elongation of more than 2.9%.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metal materials, in particular to a rare earth copper-iron alloy, a preparation method and an application thereof. Background technique [0002] Copper alloy has become an important material in the industry because of its good electrical and thermal conductivity, good corrosion resistance, easy casting, easy plastic processing and good weldability. It is widely used in electronics, electromechanical, aviation, etc. , Aerospace and other departments. With the high magnetic field magnet coils, large-scale integrated circuit lead frames and high-speed electric locomotive overhead wires, the requirements for the strength and conductivity of conductive materials are getting higher and higher. The strength of materials has become a research hotspot. Cu-Fe alloy has aroused widespread attention because of its good comprehensive performance, low production cost and environmental protection. However...

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Problems solved by technology

However, the content of Fe element in Cu-Fe-P alloy is low, generally 0.1-2.3%, while the content of iron in Cu-Fe alloy is 8-20%. The decrease of iron element content leads to the increase of copper content, which increases At the same time, the mechanical properties of the alloy will be greatly deviated. At the same time, the amount of rare earth elements added to the Cu-Fe-P alloy cannot exceed 0.2wt.%. The effect of improving the conductivity of the alloy is low, and it is difficult to meet the current Social requirements for strength and electrical conductivity of alloy materials

Although the patent CN1417357A records that the content of rare earth elements in the copper alloy can be increased to 0.3%, Zn and Ti elements need to be added to balance the overall performance of the alloy, thereby improving the electrical conductivity of the copper alloy. The types of medium elements are complex, the price of Zn and Ti elements is expensive, and the cost of copper alloy is high, which reduces the competitiveness of enterprises

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