METHOD FOR DEGASSING AL POWDER AND AL ALLOY POWDER

摘要

PURPOSE:To degas efficiently Al powder, Al alloy powder or a mixture thereof with simple equipment in a reduced number of stages as compared with conventional vacuum degassing by heating the powder in the air. CONSTITUTION:Al powder, Al alloy powder or a mixture thereof is compression-molded and degassed by heating at 200 deg.C- the m.p. of the powder in the air to manufacture a billet for extruion or a perform for casting. The heating is preferably carried out in dehumidified dry air.