Abstract
Profile requirements of silicon steel strip are extremely high and the thickness difference of cold-rolled products is usually less than 7 μm, and the profile quality of hot-rolled strip is the key to ensure the thickness difference of cold-rolled products. In order to produce the silicon steel strip with high-precision shape, the concept of quasi-rectangular rolling during hot continuous rolling was put forward; the equipment configuration and technical method of approximate rectangular section control were studied. Through the roughing multi-target load distribution technology and the roll configuration technology for uniform wear of a 4-high rolling mill, the strip crown of transfer bar was reduced and the profile control stability was guaranteed. Configuring variable contact back-up roll technology on all stands in the finishing rolling process, equipped with symmetry variable taper work roll and long-stroke intelligent shifting strategy in the downstream stands, and using side rolling lubrication technology can make the roll wear more uniform, reduce the edge drop of silicon steel strip, improve the profile quality, and make the strip section of finishing exit "quasi-rectangular". In addition, induction furnace and side heater were also equipped to guarantee the temperature uniformity of the strip, so as to improve the stability of profile control. The whole control technology is based on the 1580-mm hot continuous rolling production line, designed, and developed according to the characteristics of equipment and products, and has been successfully applied, which can obtain the approximate rectangular strip section satisfying the flatness quality, and improve the strip section precision of silicon steel and other products.
This is a preview of subscription content, access via your institution.
























References
- [1]
Z.S. Xia, Y.L. Kang, Q.L. Wang, J. Magn. Magn. Mater. 320 (2008) 3229–3233.
- [2]
X.C. Wang, Q. Yang, Y.Z. Sun, J. Iron Steel Res. Int. 22 (2015) 185–191.
- [3]
X.B. Ma, D.C. Wang, H.M. Liu, S. Zhang, Metall. Res. Technol. 116 (2019) 105.
- [4]
K. Yasuda, K. Narita, K. Kobayashi, I. Maeno, ISIJ Int. 31 (1991) 594–598.
- [5]
S. Omori, T. Kajiwara, H. Hino, H. Goto, Ironmak. Steelmak. 31 (2004) 71–80.
- [6]
K. Kitamura, T. Nakanishi, I. Yarita, N. Suganuma, K. Toyoshima, Iron Steel Eng. 72 (1995) No. 2, 27–32.
- [7]
H.G. Hartung, R. Holz, H. Pawelski, Metals 54 (2000) 581–585.
- [8]
H.N. He, X.C. Wang, Q. Yang, Mater. Sci. Forum 944 (2019) 212–221.
- [9]
C.C. Chen, J. Shao, A.R. He, N.F. Zhang, Int. J. Automat. Comput. 12 (2015) 611–619.
- [10]
J.W. Zhao, X.C. Wang, Q. Yang, Q.N. Wang, C. Liu, G.Y. Song, J. Mater. Process. Technol. 265 (2019) 99–111.
- [11]
X.J. Chai, J. Zhang, H.B. Li, Y.Z. Zhou, H.H. Ma, P.W. Zhang, Chinese Journal of Engineering 39 (2017) 1859–1865.
- [12]
Q. Yang, X.L. Chen, Y.H. Xu, L.J. Xu, Iron and Steel 30 (1995) 48–51.
- [13]
X.D. Wang, F. Li, B.H. Li, G.S. Zhu, B. Li, B.H. Zhang, Ironmak. Steelmak. 37 (2010) 633–640.
- [14]
A.R. He, Q. Yang, X.L. Chen, L. Zhao, Y.Q. Xu, Iron and Steel 42 (2007) No. 2, 31–34.
- [15]
X.D. Wang, F. Li, L. Wang, X.L. Zhang, L.J. Dong, Ironmak. Steelmak. 39 (2012) 163–170.
- [16]
J.G. Cao, G.C. Wei, J. Zhang, X.L. Chen, Y.Z. Zhou, J. Cent. South Univ.15 (2008) No. 2, 264–270.
- [17]
H.N. He, X.C. Wang, Q. Yang, X.J. Sun, J.L. Xiao, Y. Liu, G.Y. Song, Ironmak. Steelmak. 47 (2020) 512–519.
- [18]
J. Shao, A.R. He, F.F. Kong, Y. Xiang, Z. Zhou, Open Mech. Eng. J. 9 (2015) 111–116.
- [19]
J.G. Cao, S.J. Liu, J. Zhang, P. Song, T.L. Yan, Y.Z. Zhou, J. Mater. Process. Technol. 211 (2011) 1768–1775.
- [20]
C.H. Yao, A.R. He, J. Shao, Y.J. Zhang, H.S. Zhao, Ironmak. Steelmak. 47 (2020) 138–144.
- [21]
X.B. Ma, D.C. Wang, H.M. Liu, C.C. Wen, Y. Zhou, Ironmak. Steelmak. 45 (2018) 66–75.
- [22]
H.N. He, Y. Liu, Q. Yang, X.C. Wang, S. Wang, Q.N. Wang, Ironmak. Steelmak. 47 (2020) 587–595.
- [23]
J. Shao, A.R. He, Q. Yang, H.W. Guo, Journal of University of Science and Technology Beijing 33 (2011) No. 1, 93–97.
- [24]
K.N. Shohet, N.A. Townsend, J. Iron Steel Inst. 209 (1971) 769–775.
- [25]
Y. Liu, Q. Yang, X.C. Wang, C.L. Zhang, Q.N. Wang, B. Li, Iron and Steel 51 (2016) No. 2, 90–96.
Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (Grant No. 51975043), Fundamental Research Funds for the Central Universities (Grant No. FRF-TP-19-002A3), and Beijing Natural Science Foundation (3182026) for the support to this research.
Author information
Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
He, Hn., Shao, J., Wang, Xc. et al. Research and application of approximate rectangular section control technology in hot strip mills. J. Iron Steel Res. Int. (2021). https://doi.org/10.1007/s42243-021-00558-6
Received:
Revised:
Accepted:
Published:
Keywords
- Approximate rectangular section
- Hot strip mill
- Transfer bar
- Roll contour
- Shifting strategy
- Profile control