曹季林, 毛志刚, 赵向政. Analysis on Cracking and Perforation Defects of Heavy Plate Rolled from Large-Scale Ingot and Optimization of Casting Process[J]. Special Steel, 2013, 34(4): 36-39.
曹季林, 毛志刚, 赵向政. Analysis on Cracking and Perforation Defects of Heavy Plate Rolled from Large-Scale Ingot and Optimization of Casting Process[J]. Special Steel, 2013, 34(4): 36-39.DOI:
An analysis on cracking and perforation defects occurred in 230 ~ 400 mm plates rolled from 28 ~40 t ingot of low carbon steel S355JR and S355J2 (/% : 0. 17 ~0. 20C
0. 30 ~0. 55Si
1.40 - 1.60Mn
W0.020P
W0.015S
0. 020 ~ 0. 040Al
0. 020 ~0. 030Nb) is carried out. With the optimum process measures including increasing level of operation crews
controlling ingot body and hot top casting speed according to overheating extent of liquid
controlling refining end [O
]
≤ 25 x 10
-6
and aluminum content in steel 0. 020% 〜0. 040%
the ingot qualified ratio by nondestructive testing increases to 96. 8%.