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Chinese Journal of Materials Research  2014, Vol. 28 Issue (4): 308-313    DOI: 10.11901/1005.3093.2014.020
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Numerical Modeling for Roller Leveling Process of Bimetal-Plate
Xiaogang WANG(),Yueyi LI,Hailan WANG,Cunlong ZHOU,Qinxue HUANG
Shanxi Provincial Key Laboratory of Metallurgical Device Design Theory and Technology (State Key Laboratory Cultivation Base of Province-Ministry Co-Construct), Taiyuan University of Science and Technology, Taiyuan 030024
Cite this article: 

Xiaogang WANG,Yueyi LI,Hailan WANG,Cunlong ZHOU,Qinxue HUANG. Numerical Modeling for Roller Leveling Process of Bimetal-Plate. Chinese Journal of Materials Research, 2014, 28(4): 308-313.

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Abstract  

The bending stress and strain of bimetal plate during roller leveling process are studied by means of both numerical analysis and experimental verification. The results show that the calculated results are agreed fairly well with the measured data. There is a deviation between the positions of the neutral layer of strain and the geometric middle of the plate thickness. At the same time this deviation changes with the ratio of the thickness of the two metallic materials, as well as the bending degree of bimetal plate. Furthermore, the percentage of the plastic layer for each of the two metallic materials in one bent unit is different owing to the difference of their mechanical property, while the roller leveling induced residual stress decreases with the increasing number of bent units.

Key words:  foundational discipline in materials science      leveling model      numerical calculation      neutral layer      residual stress     
Received:  09 January 2014     
Fund: *Supported by National Natural Sciences Foundation of China No.51104101, Key Research of Chinese National Basic Research Program No.2012CB722801, Natural Sciences Foundation of Shanxi Province No.2011021019-4 and Research Project of Shanxi Scholarship Council No. 2013-099.

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https://www.cjmr.org/EN/10.11901/1005.3093.2014.020     OR     https://www.cjmr.org/EN/Y2014/V28/I4/308

Fig.1  Scheme of bimetal-plate (shadow-clad layer, white-matrix layer)
Fig.2  Bending deformation and layer define of bimetal-plate
Fig.3  Applied model of stress-strain
Material Yield strength, σ s /MPa Ultimate strength, σ b /MPa Modulus of elasticity, E/GPa Elongation, δ/%
Q245R 245 460 21.4 25
06Cr13 345 490 22.0 24
Table 1  Parameters of experimental materials
Fig.4  Distribution of stain and stress in cross section (3 mm Q245R +3 mm 06Cr13)
Fig.5  Distribution of strain and stress in cross section (4.5 mm Q245R +1.5 mm 06Cr13)
Fig.6  Experimental specimen
Material Intermesh (in)/mm Intermesh (out)/mm Calculated force/kN Measured force/kN
A 0.50 0.30 106 /
B 0.50 0.30 124 /
C 0.50 0.30 115 119
D 0.50 0.30 112 108
A 0.85 0.30 123 /
B 0.85 0.30 151 /
C 0.85 0.30 137 134
D 0.85 0.30 133 128
A 1.20 0.30 135 /
B 1.20 0.30 175 /
C 1.20 0.30 155 150
D 1.20 0.30 150 147
Table 2  Comparison between calculated result and measured one (A:6 mm Q245R, B: 6 mm 06Cr13, C:3 mm Q245R+3 mm 06Cr13, D: 4.5 mm Q245R+1.5 mm 06Cr13)
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