The warm compacting behavior of tungsten heavy alloy powders

Shaping behavior of 93W5Ni2Cu and 93W4.9Ni2.1Fe, typical of brittle powders, are studied when warm compacted at different temperatures, and are contrasted with that of the powder pressed at room temperature. The results show that warm compaction increases the density of greens effectively, and the peak of the density-temperature plot appears at 150℃, and that compared with common compaction, warm compaction(WP) remarkably reduces the spring back of green, that ejection force applied to warm compacted green is higher than that to the common compacted due to not any lubricant, that as for as WNiCu is concerned under the same pressure, displacement through WP is higher than that through common compaction. After sintering, radial shrinkage of WP parts is lower, and WP can improve microstructure of tungsten heavy alloys.