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Development And Optimization Of Powder Injection Molding Process For Fabrication Of Low Carbon/Oxygen Content Ti-6Al-4V Part

  • : Dongguo Lin1, Tae Gon Kang2, Sung Taek Chung3, Young-Sam Kwon3, Seong Jin Park1
  • : 1Pohang University of Science and Technology, 2Korea Aerospace University, 3CetaTech Inc.
  • : PDF Download
  • : 2016

Abstract

Powder injection molding (PIM) combining the advantages of both powder metallurgy and plastic injection molding has become an important near-net-shaping technology for producing titanium and its alloy parts. In this work, Ti-6Al-4V part with low carbon/oxygen contents has been successfully fabricated by PIM. The pre-alloyed Ti-6Al-4V powder and wax-polymer binder system were used as starting materials. The feedstock was prepared after optimizing the solid loading percentage and mixing conditions. The rheological and thermal debinding behaviors of prepared feedstock were characterized and numerically expressed based on rheometry and thermal gravity experimental results. The numerical models were used to simulate the injection molding process of Ti-6Al-4V parts to optimize the injection molding conditions. With optimized processing conditions, the Ti-6Al-4V part exhibiting excellent physical and mechanical properties with low carbon and oxygen contents was successfully fabricated by PIM.

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