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Finite Element Method Analysis of Densification Process of Sintered Steel for Automobile in Cold Forging

Author

Listed:
  • Yuki Morokuma

    (Gunma University, Maebashi, Japan)

  • Yuichiro Kamakoshi

    (Gunma Industrial Technology Center, Maebashi, Japan)

  • Shinichi Nishida

    (Gunma University, Maebashi, Japan)

  • Ikuo Shohji

    (Gunma University, Maebashi, Japan)

Abstract

The aim of this study is to clarify the effect of the process conditions such as dimensions of material and die, and applied stress on the density distribution in the sintered steel after cold forging by Finite Element Method (FEM) analysis. The analysis model was a porous material model with axial symmetry. A flow stress curve was calculated by a polynomial approximation technique for the true stress-true strain curve obtained by the compression test of the sintered cylindrical specimen. The FEM analysis of cold forging was conducted using a simplified circular cone shape model to increase local density and reduce the cold forging load. In the analysis, a closed die forging model was used. The tip angles of the circular cones and the opening angle of the die were 90, 60 degrees and 120 degrees, respectively. As a result, it was found that the relative density of the tip increases up to 550-600 MPa regardless of the tip angle. Furthermore, the sharper the tip angle, the higher the density enhancement in the tip neighborhood portion.

Suggested Citation

  • Yuki Morokuma & Yuichiro Kamakoshi & Shinichi Nishida & Ikuo Shohji, 2019. "Finite Element Method Analysis of Densification Process of Sintered Steel for Automobile in Cold Forging," International Journal of Technology and Engineering Studies, PROF.IR.DR.Mohid Jailani Mohd Nor, vol. 5(1), pages 30-36.
    • Handle: RePEc:apa:ijtess:2019:p:30-36
    DOI: 10.20469/ijtes.5.10005-1
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