The invention discloses a production process for improving segregation of core elements of a thick steel plate, and belongs to the technical field of
metal pressure
machining. The process is used for producing a steel plate with the thickness of 60-100mm and comprises the following steps of: heating a
casting blank, and performing high-reduction-rate rolling in a recrystallization area; then cooling to a non-recrystallization area for rolling, and after a certain deformation amount is completed, staying at the core part at 750-780 DEG C for 3-8 minutes so as to promote element
diffusion; then rolling is continued until the two-phase region of Ar3-Ar3 + 30 DEG C is finished, and a segregation zone is segmented through ferrite
phase change and deformation; ultrafast cooling is carried out immediately after rolling, and generation of brittle phases is inhibited; and finally,
tempering is conducted. Through the synergistic effect of'deformation-
diffusion-
phase change ', the
core component and structure of the steel plate are actively homogenized, the core
toughness, Z-direction performance and
weldability of the
thick plate are remarkably improved, and the steel plate is suitable for the fields of high-rise buildings, large-span bridges and the like with extremely high steel core quality requirements.