Ti成形体特性に及ぼす潤滑方法の影響

抄録

For the die compacting of Ti powder, lubricant-mixing and die-wall lubrication were examined. The former was carried out in the addition of zinc stearate to the Ti powder. The lubricant-mixing method was liable to produce adhesion between the die and Ti powder. The latter has been applied two-step pressing which made possible the compacting at high pressure and the preparing of the compacts containing no lubricant. In comparison of two lubrication methods, the die-wall lubrication was found to be effective for improvement of the green strength in spite of lower green density. Moreover, pure Ti sintered compacts could be obtained by this method because of keeping those samples free from contamination of furnace atmosphere with lubricant burn off products.
The characteristics of green and sintered compacts were significantly influenced by the lubrication methods regardless of the lubricant content.