Abstract：There are some edge cracks on hot roll strips of boron micro- alloyed medium carbon steel in Tangshan Iron and Steel Company during the process of FTSC thin slab production. Though the study on the high temperature thermo- plasticity of SS400B steel, it is discovered that the thermo- plasticity is the worst with the bend- straighten temperature at 750℃. Because of the fast coiling velocity, low temperature and bad plasticity in the corner of casting slab, there are some cracks in the wave hollow of oscillation marks. By analyzing the casting slab with cracks in the corner, it is found that there are some nonmetal elements and cracks in the grain boundary, which is the reason for rolling edge cracks.
王占国，郝占全，宋海武，殷楷，周士伟. FTSC中碳硼微合金钢热轧板卷边部裂纹分析[J]. 中国冶金, 2015, 25(07): 17-23.
WANG Zhan- guo，HAO Zhan- quan，SONG Hai- wu，YIN Kai，ZHOU Shi- wei. Analysis of hot roll strips edge cracks on boron micro- alloyed medium carbon steel in FTSC sheet billet. China Metallurgy, 2015, 25(07): 17-23.
2015, Vol. 25 
