A kind of copper-iron master alloy with uniform composition and preparation method thereof

Abstract

The invention belongs to the technical field of nonferrous metal smelting, and relates to a copper-iron master alloy with uniform composition and a preparation method thereof. The present invention changes the surface energy between the two phases of copper and iron by adding impurity elements Ti, P, Zr, Mg to offset the excess Gibbs free energy, and then blows oxygen to the melt to make Ti, P, Zr, Mg, etc. Oxidation of elements, and then removal by slagging, not only improves the wettability between the copper and iron phases, but also ensures the purity of the copper-iron master alloy. The copper-iron master alloy of the present invention can be prepared in a non-vacuum environment, the preparation cost is low, and the production efficiency is high. The prepared copper-iron master alloy has no pores, uniform composition, and no separation of copper and iron. At the same time, the iron phase can be fine and uniform. distribution, the average size of the iron-rich phase is ≤30 μm.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal smelting, and relates to a copper-iron intermediate alloy with uniform composition and a preparation method thereof. Background technique [0002] Cu-Fe alloy can have the inherent characteristics of copper and iron at the same time, and can have excellent antibacterial and antivirus function, excellent thermal conductivity, high strength, high electrical conductivity and excellent electromagnetic shielding performance. Copper-iron alloys can be used in many fields such as automobiles, aerospace, ships, electronic appliances, etc., and the reserves of iron on the earth are very rich. The raw materials for preparing copper-iron alloys are very easy to obtain and have great application prospects. Cu-Fe alloy is a typical immiscible alloy. The copper-iron alloy with high iron content will have severe composition segregation during the solidification process. From the Cu-Fe phase diagram, th...

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Problems solved by technology

Cu-Fe alloy is a typical immiscible alloy. The copper-iron alloy with high iron content will undergo serious composition segregation during the solidification process. From the Cu-Fe phase diagram, there is a liquid phase immiscibility gap under the liquidus line. , when the copper-iron alloy is solidified, liquid-liquid separation will occur in the melt, and it will be separated into Fe-rich phase L 1 and copper-rich phase L 2 , ie L→L 1 (iron-rich phase)+L 2 (copper-rich phase), which makes it difficult to alloy copper-iron alloys

[0003] Although people have discovered that copper-iron alloys have many excellent properties in the past hundred years, because copper-iron alloys have the characteristic of liquid-liquid separation in the solidification process, it is difficult for copper-iron alloys to be industrialized.

At present, copper-iron alloys with high iron content are mainly produced by powder metallurgy and rapid solidification technology, but these methods are difficult to achieve industrial application

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