Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)
- 2009.05a
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- Pages.450-453
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- 2009
Measurement of Mechanical Properties for Hot Press Forming
열간프레스성형에서의 기계적 물성 측정
- Ahn, Kang-Hwan ;
- Yoo, Dong-Hoon ;
- Seok, Dong-Yoon ;
- Kim, Hong-Gee (POSCO) ;
- Park, Sung-Ho (POSCO) ;
- Chung, Kwan-Soo
- 안강환 (서울대학교 재료공학부) ;
- 유동훈 (서울대학교 재료공학부) ;
- 석동윤 (서울대학교 재료공학부) ;
- 김홍기 (POSCO 기술연구소) ;
- 박성호 (POSCO 기술연구소) ;
- 정관수 (서울대학교 재료공학부)
- Published : 2009.05.07
Abstract
In order to overcome drawbacks of the advanced high strength steel such as inferior formability and large springback, the hot press forming process(HPF) has been being applied for forming of automotive sheet parts. Good formability and dimensional accuracy without springback as well as good crash performance of final products are the advantages of the HPF process. In this work, a method to characterize the mechanical properties of the HPF steel was developed based on the simple tension test at high temperatures and its finite element analysis, while it was applied to obtain strain rate and temperature dependent flow curves of the HPF steel. The final flow curves were represented by utilizing the Johnson-Cook type equation both in uniform and post-uniform deformation regions.