Abstract
ABSTRACT
We have developed the technique of warm compaction using lithium stearate as the die wall lubricant in order to obtain high density, 99 % theoretical or more, by means of a single compaction only. This technique achieves very low ejection force and enjoys epoch-making mass-production. High density is indispensable for a high performance powder metallurgical product. Unfortunately, the unavailability of superior lubricants allowed no compaction at high pressure. We have developed a specific lubricant formed by dispersing lithium stearate in water and succeeded in ultrahigh density powder compaction by means of die wall lubricated warm compaction.
