Quench Atomization of Iron-Base Alloys into Metal Powders

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Abstract
Quench atomization is discussed as a powder formation step used in the production of structural shapes by powder metallurgy. Emphasis is placed on the continuing study of atomization of liquid metals by the two-fluid nozzle method. The influence of atomization control variables on powder properties is considered, where the important characteristics include particle size, chemistry, grain size, and particle shape. Results from a 3–20 kg pilot unit are reported for the case of nitrogen atomization with an annular nozzle. Size, shape, and other powder properties are compared for the case of low and high carbon iron alloys. Some of the interrelationships between atomization and concurrent parts of the powder metallurgy study include fundamental mechanisms and process optimization as well as powder production and experimental studies.
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