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

Y.I. Kim, J.H. Kim, Y. Kim, M.Y. Lee, Y.H. Moon, D. Kim
2011 Transactions of Materials Processing  
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)
more » ... studied and the results were compared with the formability of the base material.
doi:10.5228/kstp.2011.20.8.568 fatcat:otklmsuqxzehdes75gavmbz6bi