Influencing Factors and Formation Mechanism of Banded Red Scale Defect on Hot Rolled High Strength Steel Strip Surface for Mechanical Engineering Application

WANG Chang, YU Yang, PAN Hui, WANG Lin, CHEN Jin, XU Hai-wei

Iron and Steel ›› 2014, Vol. 49 ›› Issue (9) : 64-70.

Welcome to visit Iron and Steel, July 25, 2025
Iron and Steel ›› 2014, Vol. 49 ›› Issue (9) : 64-70. DOI: 10.13228/j.boyuan.issn0449-749x.20130638

Influencing Factors and Formation Mechanism of Banded Red Scale Defect on Hot Rolled High Strength Steel Strip Surface for Mechanical Engineering Application

Author information +
History +

Abstract

Aiming at eliminating the banded red scale defect existing on the strip surface of high strength steel for mechanical engineering application, the microstructure of the cross section and surface at local defect position was observed through SEM and EPMA, and the uniformly-spaced characteristics related to the descaling system of hot rolling production line was studied. The results show that the scale thickness at the banded position is thicker than that of any other parts of the strip and there is a Si enrichment region between scale and strip. The correspondence of the spacing of banded scale and the spacing of the spray nozzles reveals that the existence of the banded scale defect is strongly related to the weak effectiveness of the finishing descaling process. The oxidization property of the given steel was analyzed through differential thermal analysis. The rapid growth of the scale thickness was found before the finishing descaling process in practice, and scale existing as Fe2SiO4 phase with strong adhesion ability leads to the difficulties of descaling process. Based on the study of the red scale formation mechanism, the control keys of hot rolling process and steelmaking have been proposed, which successfully removed the banded red scale defect.

Cite this article

Download Citations
YU Chang, YU Xiang, PAN Hui, et al. Influencing Factors and Formation Mechanism of Banded Red Scale Defect on Hot Rolled High Strength Steel Strip Surface for Mechanical Engineering Application[J]. Iron and Steel, 2014, 49(9): 64-70 https://doi.org/10.13228/j.boyuan.issn0449-749x.20130638

References

[1]刘振宇, 于洋, 郭晓波等.板带热连轧中氧化铁皮的控制技术[J].轧钢, 2009, 26(1):5-9 [2]Okada H, Fukagawa T, Ishihara H, et al.Prevention of red scale formation during hot rolling of steels [ J][J].ISIJ International, 1995, 35(12):886-891 [3]Fukagawa T, Okada H, Maehara Y.Mechanism of red scale defect formation in S-i added hot-rolled steel sheets[J].ISIJ International, 1994, 34(3):906-911 [4]Sun W, Tieu A, Jiang Z, et al.High temperature oxide scale characteristics of low carbon steel in hot rolling[J].Journal of Materials Processing Technology, 2004, 155(2):1307-1312 [5]Kiau T, Nagataki Y, Inazumi T, et al.Effects of chemical composition and oxidation temperature on the adhesion ofscale in plain carbon steels[J].ISIJInternational, 2001, 41(12):1494-1501 [6]刘振宇,于洋,郭晓波等.板带热连轧中氧化铁皮的控制技术[J].轧钢, 2009, (1):5-9 [7]孙彬,刘振宇,王国栋等.热轧钢板典型压入式氧化铁皮的分类及其形成机理[J].东北大学学报(自然科学版), 2010, 10:1417-1420 [8]魏天赋.热带氧化铁皮的成因及去除方法[J].钢铁研究, 2003, (4):25-27 [9]薛念福,李里,陈继林等.热轧带钢除鳞技术研究[J].轧钢钒钛, 2003, 24(3):52-59

10

Accesses

0

Citation

Detail

Sections
Recommended

/