Influence of central segregation control on #br# low temperature toughness of steel
WANG Changshun1，GUO Fujian2，LI Guanglong1，SHANG Chengjia1,2
(1. State Key Laboratory of Metal Materials for Marine Equipment and Applications，
Ansteel Company， Anshan 114009， Liaoning, China； 2. Collaborative Innovation Center of Steel
Technology， University of Science and Technology Beijing， Beijing 100083， China)
Abstract：The effects of different solidification microstructures (crystal ratio) on macro segregation of continuous casting billet and mechanical properties of rolled steel were studied. The results of industrial experiments show that the optimization of the continuous casting process can significantly change the solidification structure of the continuous casting billet and greatly increase the columnar crystal ratio，thereby effectively controlling the central segregation of the continuous casting billet and reducing the area of the central segregation. At the same time，the pearlite volume percent in the rolled material is obviously reduced，the uniformity of the structure is improved，the elongation after fracture is increased by 10%，and the ductilebrittle transition temperature is also lowered from 0 to -40 ℃. Therefore，controlling the degree of segregation of the billet can achieve excellent low temperature toughness，confirming the technical feasibility of developing toughness grade E steel or higher.
王长顺，郭福建，李广龙，尚成嘉. 中心偏析控制对型钢低温韧性的影响[J]. 钢铁, 2019, 54(8): 202-208.
WANG Changshun，GUO Fujian，LI Guanglong，SHANG Chengjia. Influence of central segregation control on #br# low temperature toughness of steel. Iron and Steel, 2019, 54(8): 202-208.
