Formation of internal cracks during soft reduction in rectangular bloom continuous casting

Li, Xiaobin; Ding, Hua; Tang, Zihan; He, Jicheng

doi:10.1007/s12613-012-0510-9

Cited by 38 publications

(28 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on the change in density with temperature, the strain of the billet was calculated quantitatively using the thermalmechanical-coupled model. Building a perfect 3D model is considerably complicated; thus, we assumed the following: [23,24] 1) the heat transfer along the drawing direction was not considered; 2) the thermophysical parameters of steel were only temperature-dependent and isotropic; and 3) the material was regarded as a continuous material that satisfies the small deformation theory. The initial condition was setting the casting temperature of the molten steel (1550 C).…”

Section: Relationship Between Corner Cracks and Solidification Characteristics Of Steelmentioning

confidence: 99%

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%

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

show abstract

“…Besides, the boundary condition of reduction rolls is a rotation motion around their axes. The friction coefficient between as-casting bloom and reduction rolls was assumed to be 0.33, and conversion factor of the plastic heat generation was set as 0.9 [18].…”

Section: Boundary Conditionsmentioning

confidence: 99%

Application of a chamfer slab technology to reduce internal cracks of continuous casting bloom during soft reduction process

Zong

Zhang

Wang

et al. 2019

Metall. Res. Technol.

View full text Add to dashboard Cite

The stress concentrations over the brittle temperature range (BTR) in the bloom continuous casting are the main reason of internal cracks. In order to analyze the stress distribution in the BTR of the blooms during soft reduction stage, a three-dimensional thermo-mechanical finite-element model with different corner structures (i.e. chamfer angle and chamfer length) was established. The relationship between corner structures, maximum tensile stress, as well as shear stress is analyzed, and the influence of corner structure of bloom on the internal cracks is studied. The results show that the tensile stress and the shear stress decreased gradually by properly adjusting the chamfer angle and the chamfer length of the bloom. Compared with the use of the right-angle bloom casting, the application of chamfer bloom casting is able to reduce the stress concentration over the BTR, therefore reduces the internal cracks. In addition, as a side benefit, the chamfer bloom casting can save energy required in deforming the bloom during the soft reduction process.

show abstract

“…Li et al had done researches about the formation of internal cracks in the bloom. 7) They assumed that it is closely related to the deformation in the mushy zone, and When the equivalent plastic strain is larger than the critical strain and the equivalent von Mises stress exceeds the critical fracture stress during solidification, internal cracks will appear. Han et al established a strain analysis model to study the effects of the strain status at solidifying front and the chemical composition of liquid steel on the internal cracks.…”

Section: Creep Straightening Technology Of Continuous Casting Slab Bamentioning

confidence: 99%

Creep Straightening Technology of Continuous Casting Slab Based on High-temperature Creep Property

Zhang

Guo

2017

ISIJ Int.

View full text Add to dashboard Cite

Formation of internal cracks during soft reduction in rectangular bloom continuous casting

Cited by 38 publications

References 17 publications

Causes of Corner Cracks in Hypoperitectic Microalloyed Steel Billets

Causes of Corner Cracks in Hypoperitectic Microalloyed Steel Billets

Application of a chamfer slab technology to reduce internal cracks of continuous casting bloom during soft reduction process

Creep Straightening Technology of Continuous Casting Slab Based on High-temperature Creep Property

Contact Info

Product

Resources

About