Isostatic Pressing Copper-iron Alloys

Isostatic Pressing Copper-iron Alloys 

Copper-iron alloys have both the high electrical and thermal conductivity and good plasticity of copper and the high strength, wear resistance and magnetism of iron, and also have excellent electromagnetic wave shielding properties. They have great application prospects in electronic communications, rail transit, marine ships, aerospace and national defense tools, and have attracted extensive attention from researchers in recent years. However, the two metals, copper and iron, have very different properties, have high positive enthalpy values, and belong to metastable immiscible alloys. From the copper-iron alloy phase diagram, it can be seen that solid solution does not occur in the two phases of copper and iron at room temperature, and there is a liquid phase insoluble gap at high temperature. Large-scale copper-iron alloys prepared by traditional smelting methods will pass through the two-phase separation zone during the cooling and solidification process. Therefore, it is a big technical problem to prepare copper-iron alloys with large size, uniform composition without segregation, fine iron particles and uniform distribution.

Powder metallurgy technology is a process technology that uses metal powder as raw material to prepare metal materials through forming and sintering. It has the advantages of uniform structure, no component segregation, and fine grains. Copper-iron alloys are prepared by powder metallurgy, which can freely control the ratio of copper and iron in the alloy, eliminate component segregation, distribute iron particles evenly in the copper matrix, and obtain copper-iron alloys with excellent comprehensive properties. However, there are few studies on the preparation of copper-iron alloys by powder metallurgy. The purpose of this study is to use element mixed powder, mechanical alloyed alloy powder, and water-gas combined atomized alloy powder as raw materials to prepare copper-iron alloys by cold isostatic pressing, sintering and rolling processes, and to study the microstructure, relative density, mechanical properties and physical properties of copper-iron alloys. It is hoped that a copper-iron alloy preparation process with a short production cycle and excellent comprehensive performance can be explored, laying a solid theoretical foundation for the industrial application of powder metallurgy copper-iron alloys.

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