Formation of Dense Inclusion Buildup on Submerged Entry Nozzle by Electric Current Pulse

Wen-Bin Dai, Xiu-Li Zhou, Xin Yang, Guang-Peng Tang, Dan-Bin Jia, Nai-Liang Cheng, Jing-Kun Yu

Fig. 4 Microstructures of the inclusion buildups in the inner of the nozzle casting for 270 min without ECP treatment a-c and with ECP treatment d-f: a, d microstructures close to the nozzle wall; b, e microstructures close to the molten steel; c magnification of the area marked by the frame in b; f magnification of the area marked by the frame in e