Investigation on Microstructural Delamination and Compositional Segregation in Flange Steel with a High Stretch Ratio

Liang, Wen; Yuan, Qing; Liu, Sheng; Xu, Guang

doi:10.1007/s12540-019-00551-5

Cited by 9 publications

(2 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is mainly due to the fact that the corner of the billet is cooled by 2D cooling in the mold, so the initial cooling rate of the shell is very fast, and the segregation elements have no time to diffuse. [17,28] In addition, EPMA was used to analyze the distribution of Cu near the crack. As shown in Figure 14, there is a higher concentration of Cu in the crack, which confirms that the Cu melted and penetrated along the austenite grain boundaries.…”

Section: Relationship Between Corner Cracks and Solidification Characteristics Of Steelmentioning

confidence: 99%

“…The crack sensitivity of the billet is positively correlated with the amount of δ-phase generation. [16,17] Uneven solidified billet shells and mismatches in the contraction coefficients lead to the accumulation of stress. [18] When the stress sustained by the billet is greater than the ultimate stress it can withstand, microcracks will form in the billet.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Causes of Corner Cracks in Hypoperitectic Microalloyed Steel Billets

Lü

Zhang

Bao

et al. 2021

steel research int.

View full text Add to dashboard Cite

Due to the development of continuous casting technology, the incidence of cracks in the continuous casting process has been significantly reduced. However, a few small cracks still appear during the continuous casting of special steel. For instance, cracks often appear at the corner of the billet during the production of hypoperitectic microalloyed steel. Most research on the causes of corner cracks in hypoperitectic microalloyed steel has focused on investigating the hot ductility of steel and not considered the shrinkage characteristics during solidification. Herein, the hot ductility behavior show that cracks are not related to the hot brittleness of steel. The effects of alloy composition on the phase evolution and shrinkage of steel during solidification are focused. Uneven solidification leads to excessive shrinkage of the corners in the billet, and an air gap is generated between the billet and the mold. The return of temperature in the corner of the billet results in the coarseness of the corner grain. Abnormal solidification also results in the severe deformation of the billet, leading to severe wear with the mold, causing Cu to infiltrate into the billet, and further increasing the crack sensitivity of the steel.

show abstract

Section: Relationship Between Corner Cracks and Solidification Characteristics Of Steelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%