Effect of Pressurizing Process on Molten Aluminum Alloy and Furnace Chamber Temperature of Vacuum Counter- Pressure Casting

Abstract

In pressurizing process of vacuum counter-pressure casting, the pressurizing pressure and velocity are very important parameters. Through testing the change of molten aluminum alloy and furnace chamber temperature with the time at difference pressurizing pressure and velocity, the effect of pressurizing process on molten aluminum alloy and furnace chamber temperature of vacuum counter- pressure casting is studied. The results indicate the furnace chamber temperature reduces abruptly at beginning of pressurizing process, subsequently, it elevates to the initial temperature. Moreover, the change of the furnace chamber temperature is finished in the short time. But the change of molten aluminum alloy temperature is not obvious in pressurizing process. At identical pressurizing velocity, the change of the furnace chamber temperature is bigger with increase of pressurizing pressure. Similarly, at identical pressurizing pressure, the change of the furnace chamber temperature is bigger with increase of pressurizing velocity too. Moreover, the effect of pressurizing velocity on the furnace chamber temperature is bigger than pressurizing pressure, and the change of the furnace chamber temperature don’t have effect on the change of molten aluminum alloy temperature.