A 50 kg/mm2 tensile strength level and an extremely high flangeability were achieved in a developed steel. The steel had a base chemistry of C=0.04%, Mn=0.85%, Nb=0.015%, and S=0.001%, and was processed with a hot rolling finishing temperature of 860 °C and a coiling temperature of 550 °C. This high flangeabilty was attained by reducing S content below 0.002%, as well as reducing carbon content. Elongation results could not be directly correlated to the flangeability of steel. A steel's flangeability has been found to be associated with microvoid distribution in the “as punched” condition. The developed steel exhibited the lowest density, and the smallest size, of microvoid.
Development of High Strength Hot Rolled Steel to Be Applied for Flanging Deformation
Sae Technical Papers
International Body Engineering Conference & Exposition ; 1998
1998-09-29
Aufsatz (Konferenz)
Englisch
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