YU Hailiang
,
LIU Xianghua
,
WANG Chao
,
Park Haedoo
钢铁研究学报(英文版)
The acting force on the roll system of Sendzimir mill was analyzed using 3D FEM. The roll gap pressure distribution and the acting force between rolls S and O, rolls O and I, rolls O and J, rolls I and A, rolls I and B, as well as rolls J and B were analyzed. The results showed that the roll gap pressure mainly affected the roll surface layer, 50 mm for backup roll; the roll gap pressure distribution is of double peaks among the work roll, the 1st intermediate roll (IMR), and the 2nd IMR; the maximum value of the roll gap pressure between the backup roll and the second IMR appears on the edge of the barrel of rolls; the component force presents the inparacurve distribution. These are important for reducing the wear of rolls and the break of the backup roll and guiding for production.
关键词:
roll gap pressure;Sendzimir mill;FEM
YU Hailiang
,
LIU Xianghua
,
LI Changsheng
,
WANG Guodong
钢铁研究学报(英文版)
The deformation of slab with dogbone shape during the horizontal rolling process was simulated using FEM, and the influences of apical dislocation of dogbone on the slab spread as well as the minimum crop end loss and the lost width at slab head and tail were analyzed. The results show that with the increase in the apical dislocation of dogbone (LA), the slab spread and the minimum crop end loss at slab head and tail decrease, while the lost width at slab head and tail increases. Meanwhile, the relationships of S/LALA, LH/LALA, WH/LALA, LT/LALA, and WT/LALA were obtained.
关键词:
dogbone;apical dislocation;horizontal rolling;FEM
YU Hailiang
,
LIU Xianghua
,
LI Changsheng
,
Y. Kusaba
钢铁研究学报(英文版)
The behavior of transversal cracks on the surface of the slab corner during vertical and horizontal (VH) rolling process with flat vertical roll and groove vertical roll was simulated by explicit dynamic finite element method. The closure and growth of crack and the contact pressure on surfaces of the crack in contacting zone between slab and roll during rolling process were analyzed. The results showed that during vertical rolling process, when the groove vertical roll is used, the maximum contact pressure on surfaces of the crack is 115 MPa, and the closure of crack is stable; when the flat vertical roll is used, the maximum contact pressure on surfaces of the crack is 70 MPa, and it fluctuates greatly. During horizontal rolling process, when groove vertical roll is used, the contact pressure becomes zero which may accelerate the growth of crack; when flat vertical roll is used, there is still contact pressure. The calculated results are in good agreement with the results of test.
关键词:
slab;crack;VH rolling process;FEM
YU Hailiang
,
LIU Xianghua
,
CHEN Liqing
,
LI Changsheng
,
ZHI Ying
,
LI Xinwen
钢铁研究学报(英文版)
Dimensions of one kind of stainless steel plate before finish rolling were obtained through analysis of the rough rolling processes by finite element method and updated geometrical method. The FE models of finish rolling process with a front edge roll were built, and influences of the edge rolling reduction on the stress change in the plate edge during finish rolling were analyzed. The results show that when the edge rolling reduction is increased from 0 mm to 2 mm, the compressive stress in plate corner clearly increases in edge rolling process, and the zone of tensile stress during whole rolling decreases; when the edge rolling reduction is increased from 2 mm to 5 mm, the compressive stress in the plate corner seldom changes, and the compressive stress decreases after the horizontal rolling.
关键词:
edge rolling reduction;stress;FEM;finish rolling
YU Hailiang
,
LIU Xianghua
,
WANG Guodong
钢铁研究学报(英文版)
Behavior of transversal crack notched on slab corner during verticalhorizontal rolling process was simulated by FEM. The crack tip stress in the whole rolling process was obtained. Influences of the friction coefficient, the initial crack size, the edger roll profile, and the groove fillet radii of grooved edger roll on crack tip stress were analyzed. For vertical rolling, the tension stress appears at crack tip near the slab top surface and the compression stress appears at crack tip near the slab side surface for the flat edger roll; however, the compression stress appears at crack tip near the slab top surface and the tension stress appears at crack tip near the slab side surface in the exit stage for the grooved edger roll. For horizontal rolling, the tension stress appears at crack tip just at the exit stage for the flat edger roll, and the tension stress appears in whole rolling stage; the tension stress value near the slab side surface is much larger than that near the slab top surface for the grooved edger roll.
关键词:
transversal crack;verticalhorizontal rolling process;crack tip stress;FEM
