Temperature and Deformation Distribution during Hot Continuous Rolling Process of WP720 Super Weathering Resistant Steel

SU Zexing; LI Menglin; LI Liren; LIU Chengzhi; CHENG Shengwei; LIU Xifeng; KANG Jianguang; LI Taotao

doi:10.3969/j.issn.1674-6457.2025.07.010

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Journal of Netshape Forming Engineering ›› 2025, Vol. 17 ›› Issue (7) : 89-95. DOI: 10.3969/j.issn.1674-6457.2025.07.010

Iron and Steel Forming

Temperature and Deformation Distribution during Hot Continuous Rolling Process of WP720 Super Weathering Resistant Steel

SU Zexing¹, LI Menglin¹, LI Liren², LIU Chengzhi^1,*, CHENG Shengwei¹, LIU Xifeng², KANG Jianguang², LI Taotao¹

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Abstract

The work aims to study the temperature and deformation distribution during the hot continuous rolling process of WP720 super weathering resistant steel, to provide theoretical guidance for optimizing the hot continuous rolling process of super weathering resistant steel. A thermo-mechanical coupled finite element model for the hot continuous rolling process of WP720 super weathering resistant steel was established. The multi-pass rolling process was numerically simulated, and the distribution characteristics of temperature and effective strain during the rolling process were analyzed. The finite element simulation results showed that the temperature of the surface changed drastically, while the internal temperature changed relatively slowly. The surface temperature of the rolled plate first decreased and then increased; the internal temperature of the rolled plate first increased and then decreased. The temperature distribution along the width of the rolled plate was high value at the center and low at the edge. The final rolling temperature differed by 30 ℃ between the center and the edge. Due to the frictional effect in the contact area between the rolling plate and the rolling mill, the plastic strain concentrated on the surface region of the rolled plate, and gradually expanded toward the interior as the number of passes increased, and the surface still maintained the maximum value. The surface plastic strain eventually stabilized at 4.07, while the internal plastic strain stabilized at 3.11. During the rolling process, the temperature difference between the surface and the core of the rolled plate is significant, but there is an overall decreasing trend. In the direction of the plate width, the temperature at the center is higher than that at the edges. The equivalent plastic strain of the rolled plate accumulates significantly with each pass, especially with more pronounced strain accumulation in the contact region.

Key words

super weathering resistant steel / hot continuous rolling / finite element / numerical simulation / temperature field

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SU Zexing, LI Menglin, LI Liren, LIU Chengzhi, CHENG Shengwei, LIU Xifeng, KANG Jianguang, LI Taotao. Temperature and Deformation Distribution during Hot Continuous Rolling Process of WP720 Super Weathering Resistant Steel[J]. Journal of Netshape Forming Engineering. 2025, 17(7): 89-95 https://doi.org/10.3969/j.issn.1674-6457.2025.07.010

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