| Die wall lubricated warm compaction behavior of non-lubricant admixed iron powder |
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| 作者姓名： | 叶途明 易健宏 陈仕金 彭元东 李丽娅 夏庆林 |
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| 作者单位： | [1]State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China [2]Department of Materials, University of Oxford, UK [3]Portie Yangzhou Industrial Limited Company, Yangzhou 225009, China |
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| 基金项目： | Project（715-012-0060） supported by the National High Technology Research and Development Program of China |
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| 摘 要： | The phenomena of die wall lubricated warm compaction of non-lubricant admixed iron powders were researched, and its mechanism of densification was discussed. Water atomized powder obtained from the Wuhan Iron and Steel Corporation was used. With compacting and sintering, compared with cold compaction, the density of warm compacted samples increases by 0.07 - 0. 22 g/cm^3 at the same pressed pressure. The maximum achievable green density of warm compacted samples is 7.12 g/cm^3 at 120℃, and the maximum sintered density is 7.18 g/cm^3 at 80℃. Compared with cold compaction, the ejection force of warm compaction is smaller; the maximum discrep- ancy is about 7 kN. The warm compacted mechanism of densification of iron powders can be obtained： heating the powder contributes to improving plastic deformation of powder particles, and accelerating the mutual filling and rearrangement of powder particles.
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| 关 键 词： | 压实机制 粉末冶金 铁粉 润滑 温压 |
| 文章编号： | 1005-9784（2005）06-0653-04 |
| 收稿时间： | 2005-03-10 |
| 修稿时间： | 2005-06-13 |
Die wall lubricated warm compaction behavior of non-lubricant admixed iron powders |
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| Ye Tu-ming , Yi Jian-hong , Chen Shi-jin , Peng Yuan-dong , Li Li-ya and Xia Qing-lin.Die wall lubricated warm compaction behavior of non-lubricant admixed iron powder[J].Journal of Central South University of Technology,2005,12(6):653-656. |
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| Authors: | Ye Tu-ming Yi Jian-hong Chen Shi-jin Peng Yuan-dong Li Li-ya and Xia Qing-lin |
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| Affiliation: | (1) State Key Laboratory of Powder Metallurgy, Central South University, 410083 Changsha, China;(2) Department of Materials, University of Oxford, UK;(3) Portie Yangzhou Industrial Limited Company, 225009 Yangzhou, China |
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| Abstract: | The phenomena of die wall lubricated warm compaction of non-lubricant admixed iron powders were researched, and its mechanism
of densification was discussed. Water atomized powder obtained from the Wuhan Iron and Steel Corporation was used. With compacting
and sintering, compared with cold compaction, the density of warm compacted samples increases by 0.07 – 0.22 g/cm3 at the same pressed pressure. The maximum achievable green density of warm compacted samples is 7.12 g/cm3 at 120 °C, and the maximum sintered density is 7.18 g/cm3 at 80 °C. Compared with cold compaction, the ejection force of warm compaction is smaller; the maximum discrepancy is about
7 kN. The warm compacted mechanism of densification of iron powders can be obtained; heating the powder contributes to improving
plastic deformation of powder particles, and accelerating the mutual filling and rearrangement of powder particles.
Foundation item: Project (715-012-0060) supported by the National High Technology Research and Development Program of China |
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| Keywords: | powder metallurgy warm compaction die wall lubrication ejection force mechanism of densification |
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