열처리공학회지 (Journal of the Korean Society for Heat Treatment)

  • 제35권2호
  • /
  • Pages.66-73
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  • 2022
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  • 1225-1070(pISSN)
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  • 2508-4046(eISSN)
한국열처리공학회 (The Korean Society for Heat Treatment)
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국부 연화 핫스탬핑 차체 부품의 경도 분포 및 열 변형 거동

Hardness Distribution and Dimensional Change after Partial- Hardened Hot Stamping of Automotive Body Part

  • 정우창 (대구가톨릭대학교 기계자동차공학부)
  • Jeong, Woo Chang (School of Mechanical and Automotive Engineering, Daegu Catholic University)
  • 투고 : 2022.03.06
  • 심사 : 2022.03.18
  • 발행 : 2022.03.30
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초록

Partial-hardened hot stamping has been well known to be very effective to absorb more energy in automotive lateral crash. Hardness distribution and dimensional change after partial-hardened hot stamping have been studied to find out effect of thermal deformation of the heated hot stamping die on dimensional accuracy of automotive center pillar. Soft zone of commercial center pillar showed 275~345 in Vickers hardness, indicating bigger non-uniformity which resulted from thermal deformation of heated die. Dimensional changes in soft zone of the commercial center pillar measured by three dimensional scanner were much bigger than that in hard zone. It has been found that hot stamping die compensation considering thermal deformation in soft zone causes a significant decrease in hardness deviation in the soft zone, corresponding to 20 percent of commercial center pillar and subsequently leads to much higher dimensional accuracy.

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과제정보

이 논문은 2021년도 대구가톨릭대학교 교내연구비지원으로 수행되었습니다.

참고문헌

  1. Y. Chang, Z. h. Meng, L. Ying, X. d. Li, N. Ma, and P. Hu : J. Iron. Steel. Res. Int., 18 (2011) 59.
  2. M. G. Lee, S. J. Kim, H. N. Han, and W. C. Jeong : Int. J. Mech. Sci., 51 (2009) 888. https://doi.org/10.1016/j.ijmecsci.2009.09.030
  3. J. Jeong, S. C. Park, G. Y. Shin, C. W. Lee, T. J. Kim, and M. S. Choi : Korean J. Met. Mater., 56 (2018) 787. https://doi.org/10.3365/kjmm.2018.56.11.787
  4. A. Turetta, S. Bruschi, and A. Ghiotti : J. Mater. Process. Technol., 177 (2006) 396. https://doi.org/10.1016/j.jmatprotec.2006.04.041
  5. H. Karbasian and A. E. Tekkaya : J. Mater. Process. Technol., 210 (2010) 2103. https://doi.org/10.1016/j.jmatprotec.2010.07.019
  6. Hao Zhao, Xiuli Hu, Junjia Cui, and Zhongwen Xing : Met. Mater. Int., 25 (2019) 381. https://doi.org/10.1007/s12540-018-0196-2
  7. K. Y. Kwon, N. H. Kim, and C. G. Kang : Open J. Adv. Mater. Res., 264 (2011) 241.
  8. D. Y. Lee : 24th Iron and Steel Technology Symposium, Kor. Inst. Metal. and Mater., Jeju, Korea (2021).
  9. L. Gehringhoff and H. Knaup : B-Column for Motor Vehicle, United States Patent, US6524404 B2 (2003).
  10. K. B. Kim, Y. I. Jung, and T. J. Kim : Trans. Mater. Processing, 24 (2015) 354. https://doi.org/10.5228/KSTP.24.5.354
  11. A. Ghiotti, D. Pellegrini, and S. Bruschi : Feasibility of Producing Tailored Microstructures in Hot Stamped Sheet Components, IDDRG (2009) 941.
  12. F. J. Lenze, J. Banik, and S. Sikora : Applications of Hot Formed Parts for Body in White, IDDRG (2008) 511.
  13. Nippon Steel Brochure on Special Steel Sheets and Coils (2020).
  14. W. C. Jeong : J. Kor. Soc. Heat Treatment, 34 (2021) 107. https://doi.org/10.12656/JKSHT.2021.34.3.107
  15. M. K. Ji H. Son, J. Oh, S. Kim, K. Kim, and T. Jun : Kor. J. Metals and Mater., 58 (2020) 573. https://doi.org/10.3365/kjmm.2020.58.8.573
  16. D. W. Fan, H. S. Kim, J. -K. Oh, K. -G. Chin, and B. C. Decooman : ISIJ International, 50 (2010) 561. https://doi.org/10.2355/isijinternational.50.561
  17. P. Matysik, S. Jozwiak, and T. Czujko : Materials, 8 (2015) 914. https://doi.org/10.3390/ma8030914
  18. GM Material Specification 14400.