Numerical Simulation on Deformation Behavior of High-Carbon Steel Billet During Mechanical Reduction Process

doi:10.12068/j.issn.1005-3026.2025.20249012

Abstract

Abstract:

The deformation behavior of the high-carbon steel billet in the continuous casting mechanical reduction process was analyzed from aspects such as appearance deformation， two-phase region deformation， and strain by establishing a 3D thermal-mechanical coupling numerical model. The research results show that the deformation behavior of the high-carbon steel billet during the mechanical reduction process is closely related to the amount and the position of mechanical reduction applied. A larger reduction amount indicates a larger overall appearance deformation of the billet and a more reduced area of the two-phase region caused by the mechanical reduction； the strain generated inside the billet also increases， while the reduction efficiency decreases with the increase in the reduction amount. As the reduction position moves forward， the deformation trend of the billet expanding in the width direction on both sides has intensified， and the reduction efficiency increases. Furthermore， as the central solidification rate corresponding to the reduction position decreases， the intensity and area of the lateral tensile strain in the spread direction acting on the central region of the billet show an increasing trend.

Key words: billet, continuous casting, mechanical reduction, deformation behavior, numerical simulation

CLC Number:

TF 777.1

Yu-bo GAO, Yan-ping BAO, Min WANG, Ying WANG. Numerical Simulation on Deformation Behavior of High-Carbon Steel Billet During Mechanical Reduction Process[J]. Journal of Northeastern University(Natural Science), 2025, 46(10): 96-103.

Figures/Tables 21

Table 1 Chemical composition of studied steel grade

C	Si	Mn	P	S	Cr	Ni
0.86	0.20	0.52	≤0.010	≤0.010	≤0.05	≤0.03

Table 2 Basic parameters of billet caster

断面尺寸	弧形半径/m	结晶器有效长度	二冷区长度/m	压辊直径/mm	压下覆盖区间/m
mm×mm	弧形半径/m	mm	二冷区长度/m	压辊直径/mm	压下覆盖区间/m
160×160	10	800	7.7	450	13.6~18.0

Table 3 Parameters for casting and reduction

拉速/(m·min^-1)	二冷强度/（L·kg^-1）	过热度/℃	单辊压下量区间/mm	压下位置区间
2.3	0.35	20~35	1~5	0.1~0.9

Fig.1 Schematic diagram of thermal-mechanical coupling model established for mechanical reduction process

Table 4 Comparison of calculated values and measured values of reduction reaction forces

参数	2#	3#	4#	5#	6#
压下作用力计算值/kN	32.6	109.1	203.8	306.8	254.4
压下作用力实测值/kN	31	106	196	295	264
偏差/%	4.91	2.84	3.83	3.85	-3.77

Fig.2 Variation of displacement of upper surface of billet along reduction direction with reduction amount

Fig.3 Variation of displacement of lower surface of billet along reduction direction with reduction amount

Fig.4 Variation of displacement of side surface of billet along spread direction with reduction amount

Fig.5 Variation of displacement of upper surface of billet along reduction direction with reduction position

Fig.6 Variation of displacement of lower surface of billet along reduction direction with reduction position

Fig.7 Variation of displacement of side surface of billet along spread direction with reduction position

Fig.8 Effect of reduction amount on reduced area of two-phase region of billet

Fig.9 Effect of reduction position on reduced area of two-phase region of billet

Fig.10 Effect of reduction amount on reduction efficiency

Fig.11 Effect of reduction position on reduction efficiency

Fig.12 Effect of reduction amount on strain distribution of billet

Fig.13 Effect of reduction position on strain distribution of billet

Fig.14 Effect of reduction amount on distribution of

Fig.15 Effect of reduction amount on distribution of strain component in spread direction along vertical central line of billet surface strain component in spread direction

Fig.16 Effect of reduction position on distribution of

Fig.17 Effect of reduction position on distribution of strain component in spread direction along vertical central line of billet surface strain component in spread direction

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