How to Melt Copper Alloy Using Medium Frequency Induction Furnace?

When the medium frequency induction furnace is working, its heating temperature can reach close to 2000°C. Therefore, when smelting different copper alloys, it is necessary to operate according to specific conditions. So, how to use a medium frequency induction furnace to melt copper alloy? Today, Luoyang Judian will introduce it to you.

The following two points need to be paid attention to when using medium frequency induction furnaces to smelt copper alloy: materials feeding principle and melting sequence.

The metal with the most charge should be put into the furnace first for melting. The metal with more charge is melted first to form a molten metal pool and then gradually add other metal elements, which can reduce the melting loss of metal elements.

Alloy elements that are easily oxidized and volatile should be melted in the furnace last. For example, when smelting brass, copper should be added first, and then zinc should be added after the copper is melted, because the melting point of copper is 1083°C, while the melting point of zinc is 417°C, and the boiling point of zinc is 907°C. If zinc is added first during smelting, zinc will be formed A large amount of volatilization and burning loss, but copper is added first during smelting, and zinc is added after the copper is melted. Zinc dissolves rapidly in the copper liquid. When the alloy liquid reaches the casting temperature, it can be cast out of the furnace, so the smelting and burning loss of zinc can be reduced.

The metal that releases a lot of heat when the alloy is melted should not be added to the melt alone but should be added at the same time as the previously left matrix cold material. For example, when smelting brass, an exothermic reaction will occur when aluminum is added to the molten copper, which will overheat the molten copper violently. Therefore, two-thirds of the copper should be added first during smelting, then aluminum should be added after melting, and the remaining copper should be added at the same time. One-third of the copper, so that the heat emitted by adding aluminum is used by the copper added later, which can prevent the alloy melt from overheating.

When the melting points of the two metals differ greatly, the fusible metal should be added first, and then the refractory metal should be added when the melt is formed, and gradually dissolved in the melt by the dissolution of the refractory metal. For example, when melting white copper containing 80% copper and 20% nickel, first melt the copper and heat it to about 1300°C, then add nickel (nickel pieces should be smaller and easy to melt) into the liquid and gradually melt. This shortens the melting time and ensures the alloy composition.

Alloying elements that can reduce the large amount of gas absorbed by the melt should be melted in the furnace first.

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Created on Apr 19th 2023 01:38. Viewed 100 times.

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