The smelting methods of copper nickel alloys mainly include the following:

1.Spray melting method: Copper and nickel powders are mixed and melted, and then rapidly cooled and solidified by air flow spraying. The alloy prepared by this method has a uniform structure and fine grains, with high mechanical properties.

2.Electrolytic deposition method: Soak electrolytes containing copper and nickel separately on two electrodes, and apply voltage to cause copper and nickel ions to precipitate on their respective electrodes. The alloy prepared by this method has a uniform composition and good microstructure.

3.Reaction sintering method: Powder containing copper and nickel is placed in a high-temperature furnace and subjected to sintering reaction at a good temperature, allowing the two metal powders to diffuse into each other and form an alloy. The alloy prepared by this method has high density and good mechanical properties.

4.Powder metallurgy method: Copper and nickel powders are mixed in proportion and subjected to compression and sintering processes to form alloy billets. Then, through heat treatment or processing, alloy products with the desired shape and properties are obtained.

5.Chemical deposition method: By adding different metal ions to the synthesis solution and utilizing the effects of reducing agents and complexing agents, copper and nickel metals are deposited on the substrate to form an alloy thin film. This method can be used to prepare thin film materials.

Smelting method of waste nickel and copper:

1.Chemical separation and purification: Firstly, chemical separation and purification are carried out on waste nickel and copper to remove impurities and other harmful substances. The commonly used methods include chemical methods (such as dissolution, extraction, displacement), physical methods (such as magnetic separation, reselection), and electrochemical methods (such as electrolysis, electrodeposition).

2.Electric furnace melting: Put waste nickel and copper into an electric furnace, heat it to the melting point through electrical energy, and then pour out the melted waste nickel and copper to obtain a molten nickel copper alloy.