Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (6): 146-150.doi: 10.3969/j.issn.1000-565X.2010.06.027

• Materials Science & Technology • Previous Articles     Next Articles

Effects of Vibration Force Field on Melt Rheological Properties and Phase Isolation During Metal-Powder Injection Molding

Liu Bin1  Luo Jie-wen1.2  Qu Jin-ping1  Cai Yi-xiang2   

  1. 1. Key Laboratory of Polymer Processing Engineering of the Ministry Education, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. Guangzhou Research Institute of Non-ferrous Metals, Guangzhou 510651, Guangdong, China
  • Received:2009-11-02 Revised:1900-01-01 Online:2010-06-25 Published:2010-06-25
  • Contact: 刘斌（1969-），男，博士，副教授，主要从事模具CAD／CAE／CAM、材料成型装备及数控技术研究． E-mail:bliu@scut．edu．cn
  • About author:刘斌（1969-），男，博士，副教授，主要从事模具CAD／CAE／CAM、材料成型装备及数控技术研究．
  • Supported by:

    国家自然科学基金资助项目（10590351）

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Abstract:

During the metal-powder injection molding, phase isolation between the binder and the metal powders often occurs, which may degrade the product quality in terms of density and hardness. In order to solve this problem, vibration force field is introduced in the molding. Based on the wax-based binder for the gas-atomized spherical 316L stainless steel powders with an average size of 10 μm, different powder-loading feedstocks are prepared, and the effects of vibration frequency and amplitude on the melt rheological properties and phase isolation are dis- cussed. Experimental results show that vibration force field helps to improve the rheological properties of melt powders and lengthen the flow length when the feedstock fills the Archimedes helical mold ; and that the variations of vibration frequency and amplitude can ameliorate the phase isolation of samples, especially at a vibration frequency of 10Hz and an amplitude of 0. 10mm.

Key words: dynamic injection molding, metal powder, rheological property, phase isolation