High Temperature Densification Forming Process of Tool Steel Powder Compact

공구강 분말 성형체의 고온 치밀화 성형공정

  • Choi, Hak-Hyeon (Graduate School of Pohang University of Science and Technology) ;
  • Jeon, Yun-Cheol (Graduate School of Pohang University of Science and Technology) ;
  • Kim, Gi-Tae (Dept. of Mechanical Engineering, Pohang University of Science and Technology)
  • 최학현 (포항공과대학교 대학원) ;
  • 전윤철 (포항공과대학교 대학원) ;
  • 김기태 (포항공과대학교 기계공학과)
  • Published : 1996.07.01


Densification characteristics and behavior of tool steel powder compact during high temperature forming processes were investigated under pressure less sintering, sinter forging and hot isostastic pressing. In pressureless sintering, full density was obtained at a closely controlled temperature near the solidus of the material. Finite element calculations from constitutive model for densification by power law creep and diffusional flow were compared with experimental data. Agreements between theoretical calculations and experimental data were good in hot isostatic pressing but not as good in sinter forging.


Power-Law Creep;Diffusional Flow;Pressureless Sintering;Sinter Forging;Hot Isostatic Pressing