What are the main reasons for burning loss of alloy elements in vacuum induction furnace?

Under the condition of vacuum induction melting furnace, the partial pressure of oxygen in smelting space is very low, and the oxygen content is several ten thousandths of that under normal pressure. Therefore, the oxidation loss of alloy elements accounts for a small proportion, and the main reason for the loss is vacuum volatilization. Under the combined action of high vacuum and high temperature, the vapor pressure of alloy elements increases with the increase of vacuum and temperature. The volatility of alloy elements, which were originally very weak at atmospheric pressure, increases many times under the condition of vacuum induction furnace smelting. For example, aluminum, manganese, iron, chromium, etc. It can be seen that the main reason of alloy element burning loss under vacuum induction is volatilization loss.

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