王芹, 彭其春, 王理猷, et al. Effect of Pearlite Segregation Band and Ti( C,N) on Layering of Tensile Fracture of Steel HG70C Hot Rolled Plate[J]. Special Steel, 2012, 33(5): 65-68.
王芹, 彭其春, 王理猷, et al. Effect of Pearlite Segregation Band and Ti( C,N) on Layering of Tensile Fracture of Steel HG70C Hot Rolled Plate[J]. Special Steel, 2012, 33(5): 65-68.DOI:
According to the phenomena of 8 ~ 12 mm plate tensile fracture layering of low alloy high strength welded steel HG70C (/%: 0. 069 ~D. 077C
0. 07 〜0. HSi
1. 79 〜L83Mn
0.011 〜0.012P
0. 004 ~ 0. 005S
0. 121 〜 0. 123Ti
0. 046 - 0. 047 Nb)
the morphology of fracture and area near layering are observed and analyzed by using optical and scanning electron microscope and energy spectrum analyser
and the statistical analysis of heating process parameters of bloom in real production is carried out. Results show that the layering of the steel plate tensile fracture has nothing to do with heating process for hot rolling
it is mainly related to center pearlite segregation band and large titanium carbo-nitride
and this precipitates with 2μm is found in casting bloom which are fatigue source lad to layering of tensile fracture.