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Vol.42, No.1, 82 ~ 89, 2004
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| Title |
| Mathematical Modeling ; Austenite Grain Size Prediction of Hot Forging Steel Using FEM Analysis and Dynamic Recrystallization Modeling |
| 홍승찬 Hong Seung Chan , 강훈철 Kang Hun Cheol , 안재천 An Jae Cheon , 황한섭 Hwang Han Seob , 이상주 Lee Sang Ju , 이경종 Lee Gyeong Jong , 박종진 Park Jong Jin , 이경섭 Lee Gyeong Seob |
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| Abstract |
| Austenite grain size of automotive forging steel was predicted by FEM analysis and dynamic recrystallization model. The hot forging process consisting of rolling, busting, blocking and finishing for lower arm connector was analyzed by commercial code DEFORM-3D. The flow curve and the dynamic recrystallization behavior of 0.43C steel were determined by hot compression test. The process parameters such as temperature, strain and strain rate obtained by the FEM analysis were coupled with the dynamic recrystallization model and they were applied to hot compression test. The variation of the grain size during the entire forging process was calculated by computer programming of the coupled model. The predicted final grain sizes agreed well with the experimentally observed. |
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| Key Words |
| Hot forging, Dynamic recrystallization, Flow stress, Austenite grain size |
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