(S213)Effect of crystallographic texture and microstructure on anisotropic mechanical property of hot-rolled Ti-Nb microalloyed low carbon HSLA steel

摘要

It is generally known that high strength low alloyed (HSLA) steelis manufactured by thermomechanical rolling (TM rolling)associated with fine precipitates such as TiC, NbC in order toobtain high strength and good ductility. However, the TM rollingimposed on HSLA steel leads to generation of delamination,perpendicular to main crack (or parallel to sheet surface), duringuniaxial tensile test [1-3]. However, it was not clarified whichfactor was responsible for that unique anisotropic mechanicalbehavior in HSLA steel during elongation. In the present study,we aim to clarify effect of crystallographic texture andmicrostructure by developed in diffrent hot rolling temperature onthe unique anisotropic behavior of Ti-Nb microalloyed low carbonHSLA steel.