Abstract：Due to eccentricity of rolls，installation error of rolls，bending and wearing of rolls，the rolls deviate from the designed positions，causing roll misalignment，which exerts significant influences on the bulging of continuous casting slab. Based on the elasto-viscoplastic behavior of steel at an elevated temperature，a mathematical model of dynamic bulging with the movement of the slab between two roll pitches was developed. Then according to the model，the bulging profiles of the slab on a pilot caster were computed. And in order to check the validity of this mathematical model，the calculated bulging profiles were compared with the measurements on a pilot caster. Then the bulging profiles of the slab combined with roll misalignments on the different segments of an industrial caster designed by VAI were computed according to the equipment and process parameters. The influences of roll pitches on the maximum strain at the solidifying front with specified roll alignment tolerances were discussed，and then an optimization method of roll pitches was presented.
韩培培，任廷志，金 昕. 辊子错位对铸坯鼓肚变形的影响[J]. 钢铁, 2016, 51(6): 53-58.
HAN Pei-pei，REN Ting-zhi，JIN Xin. Influence of roll misalignment on bulging of continuous casting slab. Iron and Steel, 2016, 51(6): 53-58.
Verma R K, Girase N U.Comparison of different caster designs based on bulging,bending and misalignment strains in solidifying strand[J].Ironmaking & Steelmaking, 2006, 33(6):471-476
[1]
Verma R K, Girase N U.Comparison of different caster designs based on bulging,bending and misalignment strains in solidifying strand[J].Ironmaking & Steelmaking, 2006, 33(6):471-476
[2]
LI Cheng-bin, Thomas B G, MEI Feng.Prediction of centerline cracks incurred in the bloom continuous casting of steel[J].Baosteel Technical Research, 2010, 4(2):40-43
[2]
LI Cheng-bin, Thomas B G, MEI Feng.Prediction of centerline cracks incurred in the bloom continuous casting of steel[J].Baosteel Technical Research, 2010, 4(2):40-43
WANG Zhong-min, LIU Hong-zhao, YANG La-dao, et al.Mathematical model of visco-elastic thin plate and analyses of bulging deformation for continuous cast slabs[J].Chinese Journal of Mechanical Engineering, 2001, 37(2):66-69
[6]
WANG Zhong-min, LIU Hong-zhao, YANG La-dao, et al.Mathematical model of visco-elastic thin plate and analyses of bulging deformation for continuous cast slabs[J].Chinese Journal of Mechanical Engineering, 2001, 37(2):66-69
WANG Zhong-min, HUANG Zi-yuan.Viscoelastic bulging deformation analysis of continuous casting slab based on the symplectic geometric method[J].Chinese Journal of Mechanical Engineering, 2014, 50(23):82-88
[8]
WANG Zhong-min, HUANG Zi-yuan.Viscoelastic bulging deformation analysis of continuous casting slab based on the symplectic geometric method[J].Chinese Journal of Mechanical Engineering, 2014, 50(23):82-88
[9]
Kajitani T, Drezet J M, Rappaz M.Numerical simulation of deformation-induced segregation in continuous casting of steel[J].Metallurgical and Materials Transactions A, 2001, 32(6):1479-1491
[9]
Kajitani T, Drezet J M, Rappaz M.Numerical simulation of deformation-induced segregation in continuous casting of steel[J].Metallurgical and Materials Transactions A, 2001, 32(6):1479-1491
[10]
Okamyra K, Kawashima H.Three-dimensional elasto-plastic and creep analysis of bulging in continuously cast slabs[J].ISIJ international, 1989, 29(8):666-672
[10]
Okamyra K, Kawashima H.Three-dimensional elasto-plastic and creep analysis of bulging in continuously cast slabs[J].ISIJ international, 1989, 29(8):666-672
[11]
Sugitani Y, Masanori N.Measurement of bulging in continuous casting machine[J].Tetsu To Hagane, 1984, 70(12):S898-
[11]
Sugitani Y, Masanori N.Measurement of bulging in continuous casting machine[J].Tetsu To Hagane, 1984, 70(12):S898-
[12]
Wang Wentao, Guo Xunzhong, Huan Bo.The flow behaviors of CLAM steel at high temperature[J][J].Materials Science and Engineering A, 2014, 599:134-140
[12]
Wang Wentao, Guo Xunzhong, Huan Bo.The flow behaviors of CLAM steel at high temperature[J][J].Materials Science and Engineering A, 2014, 599:134-140
[13]
Bernhard C, Hiebler H, Wolf M.Simulation of Shell Strength Properties by the SSCT Test[J].ISIJ international, 1996, 36(Supplement):163-166
[13]
Bernhard C, Hiebler H, Wolf M.Simulation of Shell Strength Properties by the SSCT Test[J].ISIJ international, 1996, 36(Supplement):163-166
[14]
Seid K, Thomas B G.Thermo-mechanical models of steel solidification based on two elastic visco-plastic constitutive laws[J].Journal of Materials Processing Technology, 2008, 197(1-3):408-418
[14]
Seid K, Thomas B G.Thermo-mechanical models of steel solidification based on two elastic visco-plastic constitutive laws[J].Journal of Materials Processing Technology, 2008, 197(1-3):408-418
[15]
Huespe A E, Gardona A, Nigro N.Visco-plastic constitutive models of steel at high temperature[J].Journal of Materials Processing Technology, 2000, 102(1-3):143-152
[15]
Huespe A E, Gardona A, Nigro N.Visco-plastic constitutive models of steel at high temperature[J].Journal of Materials Processing Technology, 2000, 102(1-3):143-152
[16]
Martin C L, Favier D, Suéry M.Viscoplastic behavior of porous metallic materials saturated with liquid part I: Constitutive equations[J].International Journal of Plasticity, 1997, 13(3):215-235
[16]
Martin C L, Favier D, Suéry M.Viscoplastic behavior of porous metallic materials saturated with liquid part I: Constitutive equations[J].International Journal of Plasticity, 1997, 13(3):215-235
[17]
Shigeyuki M, Kaname W, Yukio W.Analysis of Bulging in Continuously Cast Slabs[J].Tetsu-to-Hagan, 1983, 69(12):S938-
[17]
Shigeyuki M, Kaname W, Yukio W.Analysis of Bulging in Continuously Cast Slabs[J].Tetsu-to-Hagan, 1983, 69(12):S938-
[18]
Pühringer O M.Strand Mechanics for Continuous Slab Casting Plants[J].Stahl u. Eisen, 1976, 96(6):279-284
[18]
Pühringer O M.Strand Mechanics for Continuous Slab Casting Plants[J].Stahl u. Eisen, 1976, 96(6):279-284
[19]
Kinoshita K, Emi T, Kasai M.Thermal elasto-plastic stress analysis of solidifying shell in continuous casting mold[J].Tetsu-to-Hagan, 1979, 65(14):2022-2031
[19]
Kinoshita K, Emi T, Kasai M.Thermal elasto-plastic stress analysis of solidifying shell in continuous casting mold[J].Tetsu-to-Hagan, 1979, 65(14):2022-2031
[20]
Pierer R, Bernhard C, Chimani C.Evaluation of common constitutive equations for solidifying steel[J].BHM Berg-und Hüttenm?nnische Monatshefte, 2005, 150(5):163-169
[20]
Pierer R, Bernhard C, Chimani C.Evaluation of common constitutive equations for solidifying steel[J].BHM Berg-und Hüttenm?nnische Monatshefte, 2005, 150(5):163-169
[21]
Kozlowski P K, Thomas B G, Azzi J A.Simple constitutive equations for steel at high temperature[J].Metallurgical Transaction A, 1992, 23(3):903-918
[21]
Kozlowski P K, Thomas B G, Azzi J A.Simple constitutive equations for steel at high temperature[J].Metallurgical Transaction A, 1992, 23(3):903-918
[22]
Bealy E L.On the mechanism of halfway cracks and macro-segregation in continuously cast steel slabs (i)Halfway cracks[J].Scandinavian Journal of Metallurgy, 1995, 24(2):63-80
[22]
Bealy E L.On the mechanism of halfway cracks and macro-segregation in continuously cast steel slabs (i)Halfway cracks[J].Scandinavian Journal of Metallurgy, 1995, 24(2):63-80
2016, Vol. 51 
