Effect of high temPerature deformation on reduction of Prior austenite grain size for imProving hot ductility of steel

摘要

Transverse cracking and edge cracking are generally known to be occurred in unbending Process during continuous casting that affects deterioration of surface quality. In Previous works, several methods for refining grain size have been investigated for the reduction of surface defects. Hot ductility would be increased by refining Prior austenite grain size with high temPerature deformation. Generally, controlled rolling is adoPted for refinement of grain size to imProve hot ductility through recrystallization. This work is focused on the recrystallization by means of RX and DRX through comPressive deformation in high temPerature before tensile test.