Die wall lubricated warm compaction of iron-based powder metallurgy material

来源期刊：中国有色金属学报(英文版)2002年第6期

论文作者：倪东惠 陈维平 肖志瑜 温利平 吴苑标

文章页码：1095 - 1098

Key words：warm compaction; die wall lubrication; powder metallurgy iron-based material

Abstract: Lubricant is harmful to the mechanical properties of the sintered materials. Die wall lubrication was applied on warm compaction powder metallurgy in the hope of reducing the concentration level of the admixed lubricant. Iron-based samples were prepared by die wall lubricated warm compaction at 175℃, using a compacting pressure of 550MPa. Emulsified polytetrafluoroethylene(PTFE) was used as die wall lubricant. Admixed lubricant concentration ranging from 0 to 0.5% was tested. Extremely low admixed lubricant contents were used. Results show that in addition to the decrease in ejection forces, the green density of the compacts increases with the decrease of admixed lubricant content until it reaches the maximum at 0.06% of lubricant content, then decreases with the decrease of admixed lubricant content. The mechanical properties of the sintered compacts that contain more than 0.06% admixed lubricant are better than those of the samples that contain lesser lubricant. No scoring was observed in all die wall lubricated experiments.

基金信息：the National Natural Science Foundation of China
the Natural Science Foundation of Guangdong Province, China