Study on Warm Flow Compacted Tungsten-Based Alloy Powder for Cross-Shape Part
Warm flow compaction is a new, simple and economy process that can produce complex powder metallurgy parts. A special apparatus for measuring the lateral flow capability of the powder was designed and manufactured. It can be used to analyze the feasibility of forming complex cross-shaped parts. The preparation of the powder blend and effects of pressing speed, temperature and axial pressure on the lateral flow capability of a tungsten-base powder mix were investigated. Results showed that the lateral-pressure increased with increased pressing speed and increased applied axial-pressure. The lateral-pressure decreased as lateral-distance increased. Biggest lateral-pressure was obtained when the powder blend was pressed at around 96 °C, at which the binder start to melt. In this study cross-shaped powder metallurgy parts were successfully prepared by warm flow compaction.
Young Won Chang, Nack J. Kim and Chong Soo Lee
Z. Y. Xiao et al., "Study on Warm Flow Compacted Tungsten-Based Alloy Powder for Cross-Shape Part", Materials Science Forum, Vols. 561-565, pp. 921-924, 2007