대형 압축기 휠의 열간단조 공정설계

Hot Forging Design for a Large Scale Compressor Wheel

  • 임정숙 (한국기계연구원 공정연구부) ;
  • 염종택 (한국기계연구원 공정연구부) ;
  • 김현규 (㈜STX 기술연구소) ;
  • 박노광 (한국기계연구원 공정연구부)
  • 발행 : 2003.10.01

초록

Hot-forging Process and die design was made for a large-scale compressor wheel of Ti-6Al-4V alloy with 2-D FE analysis. The design integrated the geometry-controlled approach and dynamic materials modelling(DMM). In order to obtain the processing contour map of Ti-6Al-4V alloy based on DMM, compression tests were carried out in the temperature range of 915$^{\circ}C$ to 1015$^{\circ}C$ and the strain range of 10$\^$-3/s$\^$-1/ to 10s$\^$-1/. In the die design of the compressor wheel using the rigid-plastic FE analysis, forging dimensional accuracy, the capacity of the forging machine and defect-free forging were considered as main design factors. The microstructure of hot forged wheel using the designed die showed a typical alpha-beta structure without forging-defects.

키워드