Improvement of a high velocity compaction technique for iron powder

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• 作者：Dil Faraz Khan (1147) (4147)
  Haiqing Yin (1147)
  Zahid Usman (2147)
  Matiullah Khan (3147) (4147)
  Xianjie Yuan (1147)
  Wenhao Wang (1147)
  Xuanhui Qu (1147)
  
• 关键词：High velocity compaction ; URA device ; Green density ; Spring back ; Green strength ; Hardness
• 刊名：Acta Metallurgica Sinica (English Letters)
• 出版年：2013
• 出版时间：August 2013
• 年：2013
• 卷：26
• 期：4
• 页码：399-403
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• 作者单位：Dil Faraz Khan (1147) (4147)
  Haiqing Yin (1147)
  Zahid Usman (2147)
  Matiullah Khan (3147) (4147)
  Xianjie Yuan (1147)
  Wenhao Wang (1147)
  Xuanhui Qu (1147)
  
  1147. Laboratory of Particulate and Powder Metallurgy, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
  4147. Department of Physics, University of Science and Technology Bannu, Bannu, 28100, Pakistan
  2147. Research Centre of Materials Science, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
  3147. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
  
• ISSN：2194-1289

文摘

Water atomized pure iron powder was compacted by high velocity compaction (HVC) with and without upper relaxation assist (URA) device. The influence of URA device on green density, spring back, green strength and hardness was studied. Morphological characteristics of the samples were observed by scanning electron microscope (SEM). Green strength of the samples was measured by computer controlled universal testing machine. The results show that as stroke length increases, the green density, green strength and hardness of the compacts increase gradually. At the identical stroke length, the green density of the compacts pressed with URA devise was 2% higher than the compacts pressed without URA device. The green strength and hardness of the compacts pressed with URA device were higher than the compacts pressed without URA device. Furthermore, the radial spring back of the compacts decreased gradually with the increment in stroke length, whilst that of compacts prepared with URA device was lower.