Ring-Rolling Design of a Large-Scale Ti-6Al-4V alloy

대형 Ti-6Al-4V 합금의 Ring-Rolling 공정설계

  • 염종택 (한국기계연구원, 재료기술연구소) ;
  • 정은정 (한국기계연구원, 재료기술연구소) ;
  • 김정한 (한국기계연구원, 재료기술연구소) ;
  • 이동근 (한국기계연구원, 재료기술연구소) ;
  • 박노광 (한국기계연구원, 재료기술연구소) ;
  • 최승식 ((주)태웅) ;
  • 이종수 (포항공과대학교, 신소재공학과)
  • Published : 2006.05.11

Abstract

The ring rolling design for a large-scale Ti-6Al-4V alloy ring was performed with a calculation method and FEM simulation. The ring rolling design includes geometry design and optimization of process variables. The calculation method was to determine geometry design such as initial billet and blank size, and final rolled ring shape. A commercial FEM code, SHAPE was used to simulate the effect of process variables in ring rolling on the distribution of the internal state variables such as strain, strain rate and temperature. In order to predict the forming defects during ring rolling, the process-map approach based on Ziegler's instability criterion was used with FEM simulation. Finally, an optimum process design to obtain sound Ti-6Al-4V rings without forming defects was suggested through combined approach of Ziegler's instability map and FEM simulation results.

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