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홍석무(S. M. HONG),유수열(S. Y. Ryu),박종규(J. K. PARK),윤석진(S. J. Yoon),김기정(K. J. KIM),김헌영(H. Y. KIM) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.10
Recently, ultra high strength products can be manufactured by the hot press forming process of Boron steel in automotive and electronics industries. In order to get high strength, the hot press forming should be accompanied by quenching process inducing phase transformation. In the study, the heat conductive die and the cooling channel were designed by the numerical simulation and the effect of there different parameters were determined to improve cooling characteristics.
홍석무(S. M. Hong),황지훈(J. H. Hwang),심재원(J. W. Sim),정완진(W. J. Chung),전만수(M. S. Joun) 한국소성가공학회 2015 한국소성가공학회 학술대회 논문집 Vol.2015 No.5
In this paper, a three-dimensional elastoplastic finite element analysis is conducted to reveal the fracture occurring in plate forging of a clad plate. Formability limit diagram (FLD) technique is applied in the clad material which is thin enough for FLD technique to be applied. To obtain reliable predictions, special finite element mesh system is employed. The predictions are compared with experiments, showing that they are in good agreement with each other.