Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Formability Evaluation of Tailor Welded Blanks of Boron Steel Sheets by Erichsen Cupping Test at Elevated Temperature

보론강 용접 맞춤 판재의 고온 에릭슨 커핑 평가

  • 김영일 (한국기계연구원 부설 재료연구소 변형제어연구그룹) ;
  • 김지훈 (한국기계연구원 부설 재료연구소 변형제어연구그룹) ;
  • 김용 (고등기술원 로봇생산기술센터) ;
  • 이문용 (성우하이텍 기술연구소) ;
  • 문영훈 (부산대학교 기계공학과) ;
  • 김대용 (한국기계연구원 부설 재료연구소 변형제어연구그룹)
  • Received : 2011.10.11
  • Accepted : 2011.11.08
  • Published : 2011.12.01
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Abstract

The combination of tailor welded blank (TWB) and hot stamping often offers improved crash-worthiness and reduced mass of stamped parts in the automobile body. To investigate the formability of laser TWB and the reliability of weld line, the present study used 22MnB5 boron steel sheet of the same thickness and used the Erichsen cupping test at elevated temperatures. The effects of laser direction, die temperature, weld line positions and forming speed on formability(the limiting dome height) were studied and the results were compared with the formability of the base material.

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References

  1. H. Karbasian, A. E. Tekkaya, 2010, A Review on Hot Stamping, J. Mater. Process. Technol., Vol. 210, No. 15, pp. 2103-2118. https://doi.org/10.1016/j.jmatprotec.2010.07.019
  2. D. Kim, J. H. Kim, D. H. Yoo, K. Chung, Y. Kim, M. Y. Lee, 2011, Flow Behavior of Laser Welded Boron Steel Sheet in Uniaxial Tension at Elevated Temperature, Trans. Mater. Process., Vol. 20, No. 5, pp. 362-363. https://doi.org/10.5228/KSTP.2011.20.5.362
  3. J. Maas, W. Staudinger, 2008, Tailored Blanks in Hot Stamping, ThyssenKrupp techforum, Issue 1, pp. 29-31.
  4. W. F. Hosford, R. M. Carddell, 1983, Metal Forming: Mechancis and Metallurgy, Prentice-Hall, New Jersey, p. 303.

Cited by

  1. A Study on Laser Weldability of Al-Si Coated 22MnB5 Steel for TWB Hot Stamping vol.31, pp.2, 2013, https://doi.org/10.5781/KWJS.2013.31.2.30