Copper-iron intermediate alloy and preparing method thereof

Abstract

The invention discloses copper-iron intermediate alloy and a preparing method thereof. The copper-iron intermediate alloy is prepared from, by mass percentage, 20-50% of Fe, 0.01-1.0% of Ni, 0.01-1.0%of Cr, 0.01-0.5% of Mg, 0.01-0.5% of Y, 0.01-0.05% of S, 0.005-0.03% of P and the balance copper and other inevitable trace impurities. The invention further provides a preparing method of the copper-iron intermediate alloy. Ni, Cr, Mg, Y, S, P and other various metal elements are added, and a technology of combining smelting with compressed air blowing and quick cooling is adopted under a non-vacuum condition. According to the copper-iron intermediate alloy prepared by means of the method, segregation and beneficiation of iron in ingot casting are avoided, the component homogeneity is greatly improved, and can reach the range of + / -2%, and the average size of the iron-rich phase is smaller than or equal to 50 micrometers.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metal alloys, in particular to a method for preparing a copper-iron master alloy. Background technique [0002] Copper-iron alloy with high iron content (iron content ≥ 5%) has excellent performance and is regarded as a new generation of high-end copper alloy material. It has both the electrical conductivity, thermal conductivity, ductility, elasticity, etc. of copper, as well as the wear resistance and hardness of iron. And it has high electromagnetic wave shielding performance, antibacterial properties, etc., and has broad application prospects in many fields such as electronic products, auto parts, and medical equipment. [0003] During the smelting process of alloys, some elements are added in the form of intermediate alloys. Using the method of adding master alloy, on the one hand, it can reduce the smelting loss of alloy elements, so as to realize the precise control of the chemical com...

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Problems solved by technology

[0004] In the process of producing copper-iron alloy with high iron content by using a specific master alloy masterbatch, the preparation of copper-iron master alloy has the following difficulties: the solid solubility of iron in copper is extremely low, and the solid solubility is still less than 5% at 1100 ° C; iron and The density of copper has a large difference, and stratification is prone to occur during the smelting process; as the iron content increases, the melting temperature of the master alloy is very high, and when the Fe content is > 20%wt, the liquidus temperature in the Cu-Fe phase diagram over 1400°C

Moreover, the melting points of copper and iron are very different, about 500 ° C, so segregation is easy to occur during casting, resulting in uneven composition and enrichment of iron

[0005] Patent CN 104975202 A provides a method for preparing copper-iron master alloys under vacuum conditions. In the production processes of vacuum smelting, ingot milling, hot rolling and shearing, etc., the requirements for equipment are high, the procedures are numerous, and there are low output, high cost problem

Patent CN 104611592 A provides a simple copper-iron master alloy melting method, which is difficult to prepare copper-iron master alloy with high iron content, and cannot guarantee the uniform distribution and non-segregation of iron elements

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