유한요소법에 의한 열간성형공정에서 강의 미세조직변화 예측

Prediction of Microstructural Evolution in Hot Forging of Steel by the Finite Element Method

  • 장용순 (LG 전자 PCB OBU 기술개발팀) ;
  • 고대철 (양산대학 메카트로닉스) ;
  • 김병민 (부산대학교 정밀정형 및 금형가공 연구센터)
  • 발행 : 1998.07.01

초록

The objective of this study is to demonstrate the ability of a computer simulation of microstructural evolution in hot forging of C-Mn steels. The development of microstructure is strongly dependent on process variables and metallurgical factors that affect time history of thermodynamical variables such as temperature, strain. and strain rate during deformation. Then finite element method is applied for the prediction of microstructural evolution, and it should be coupled with heat transfer analysis to consider the change of thermodynamical properties during forming process. In this study, Yada's recrystallization model and rigid-thermoviscoplastic finite element method are employed in order to analyze microstructural evolution during hot forging process. To show the validity and effectiveness of the proposed method, experiments are accomplished and the results of experiments are compared with those of simulations.

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