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Behaviour of Longitudinal Cracks on Slab Surfaces in V‐H Rolling Processes
Author(s) -
YU HaiLiang,
LIU XiangHua,
REN XiaoJia
Publication year - 2008
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.200806163
Subject(s) - fillet (mechanics) , materials science , slab , elongation , finite element method , composite material , friction coefficient , enhanced data rates for gsm evolution , frictional coefficient , mechanics , structural engineering , ultimate tensile strength , engineering , telecommunications , physics
The behaviour of longitudinal cracks on slab surfaces in multi‐pass vertical‐horizontal rolling processes was simulated by the finite element method (FEM). The influence of friction coefficients and fillet radii of grooved edge rolls on the closure and growth of cracks were analysed in regard to crack shape and crack length elongation ratio. The results indicate that the crack width increases both with increasing friction coefficient and with increasing fillet radii of the grooved edger rolls; the crack length increases as the fillet radii increase in V 1 and H 1 passes, and decreases as the fillet radii increase in V 2 ~ H 3 rolling. Moreover, the cracks become longer under a higher friction coefficient. Experiments of the behaviour of longitudinal cracks on slab surfaces in multi‐pass V‐H rolling processes were investigated taking lead as model material for the hot rolling of steel. The calculated results showed similar deformation variations compared to the experimental ones.