| 铁基粉末的流动温压行为 |
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| 引用本文： | 高红云,邵明,屈盛官,肖志瑜.铁基粉末的流动温压行为[J].华南理工大学学报(自然科学版),2010,38(12). |
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| 作者姓名： | 高红云 邵明 屈盛官 肖志瑜 |
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| 作者单位： | 华南理工大学机械与汽车工程学院; |
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| 基金项目： | 国家自然科学基金资助项目，广东省自然科学基金资助项目 |
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| 摘 要： | 为探讨流动温压工艺对铁基粉末成形的效果,采用自行设计的流动温压测试系统,研究了雾化铁粉与细羰基铁粉的混合粉末的流动温压行为.研究显示:与常温压制相比,流动温压过程中的侧压力随横向距离的增加下降趋势更为缓慢,特别是在常规粉末成形压力600～700MPa下具有比常温压制更高的侧压系数,即在相同位置处具有更高的侧压力和致密度;以聚乙二醇(PEG)作为铁粉的粘结剂时,最佳压制温度、压制速度分别为62℃、240mm/min,适宜的PEG含量为2%～3%;在流动温压条件下,粘结剂将金属粉末包覆并粘结在一起,改善了金属粉末的填充能力,并提高了润滑膜的承载能力,从而改善了粉末的压力传递效果,可成形形状较为复杂且具有较高致密度的粉末冶金零件.
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| 关 键 词： | 流动温压 铁基粉末 聚乙二醇 致密化 |
Warm Flow Compaction Behaviors of Iron-Based Powders |
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| Gao Hong-yun,Shao Ming,Qu Sheng-guan,Xiao Zhi-yu.Warm Flow Compaction Behaviors of Iron-Based Powders[J].Journal of South China University of Technology(Natural Science Edition),2010,38(12). |
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| Authors: | Gao Hong-yun Shao Ming Qu Sheng-guan Xiao Zhi-yu |
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| Institution: | Gao Hong-yun Shao Ming Qu Sheng-guan Xiao Zhi-yu(School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China) |
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| Abstract: | In order to explore the effect of warm flow compaction on the forming process of iron-based powders,the behaviors of warm flow compaction of the mixture of atomized iron powders and fine ferrocarbonyl powders are analyzed by using a self-developed testing system.By comparing the room-temperature compaction with the warm flow compaction,it is found that the decrease rate of lateral pressure in the warm flow compaction with the increase of transverse distance is slow,especially,at general powder-forming press... |
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| Keywords: | warm flow compaction iron-based powder polyethylene glycol densification |
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