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FE Analysis of Hot Forging Process and Microstructure Prediction for Lower Arm Connector

로워암 커넥터 열간단조 공정의 유한요소해석 및 미세조직 예측

  • 박종진 (홍익대학교) ;
  • 황한섭 (홍익대학교 대학원 기계공학과) ;
  • 임상주 (홍익대학교 대학원 기계공학과) ;
  • 홍승찬 (한양대학교 대학원 신소재 공학부) ;
  • 임성환 (한양대학교 대학원 신소재 공학부) ;
  • 이경섭 (한양대학교 대학원 신소재 공학부) ;
  • 이경종 (한양대학교 대학원 신소재 공학부)
  • Published : 2003.07.01

Abstract

In the present study, hot forging process for a lower arm connector of an automobile was investigated. An FEM code, DEFORM-3D, was used to analyze the process and the process parameters, such as temperature, strain and strain rate, were obtained. The microstructure of the connector was predicted by applying the Sellars and Yada microstructure evolution models to the process parameters. The method of microstructure prediction used in the present study seems to be effective for the quality assurance of a forged automotive product.

Keywords

Lower Arm Connector;FEM;Hot Forging;Microstructure;Recrystallization;Plastic Flow

References

  1. Yoo, I. C., Park, J. J. and Choe, S. J., 1996, 'Flow Stresses of Inconel 718 and Ti-6AI-4V Considering Deformation Heat,' J. of the Korean Inst. of Met. & Mater., Vol. 34, No.8, pp. 973-977
  2. Hong, C. P. and Park, J. J., 2001, 'Design of Rolling Path Schedule for Refinement of Austenite Grain,' Transactions of the KSME, A, Korea, pp. 1844-1853
  3. Senuma, T., Yada, H., Matsumura, Y. and Futamura, T., 1984, 'Structure of Austenite of Carbon Steels in High Speed Hot Working Process,' Tetsuto-Hagan, Vol. 70, pp. 2112-2119 https://doi.org/10.2355/tetsutohagane1955.70.15_2112
  4. Sellars, C. M., 1980, 'Hot Rolling and Forming Processes,' edited by C. M. Sellars and G. J. Davies, Met. Soc., London
  5. Sellars, C. M., 1990, 'Modeling Microstructural Development during Hot Rolling,' Material Sci. & Tech., Vol. 6, pp. 1072-1081 https://doi.org/10.1179/mst.1990.6.11.1072
  6. Feng, J. P. and Luo, Z. J., 2000, 'A Method for the Optimal Control of Forging Process Variables Using the Finite Element Method and Control Theory,' Journal of Materials Processing Technology, Vol. 108, pp. 40-44 https://doi.org/10.1016/S0924-0136(00)00654-3
  7. Jahazi, M. and Eghbali, B., 2001, 'The Influence of Hot Forging Conditions on the Microstructure and Mechanical Properties of Two Microalloyed Steels,' Journal of Materials Processing Technology, Vol. 113, pp. 594-598 https://doi.org/10.1016/S0924-0136(01)00599-4
  8. Jang, Y. S., Ko, D. C. and Kim, B. M., 2000, 'Application of the Finite Element Method to Predict Microstructure Evolution in the Hot Forging of Steel,' Journal of Materials Processing Technology, Vol. 101, pp. 85-94 https://doi.org/10.1016/S0924-0136(99)00460-4