Studies of the conditions of formation of transverse corner cracks on the surface of continuous-cast slabs

Isaev, O. B.; Kislitsa, V. V.; Fedosov, A. V.

doi:10.1007/s11015-012-9492-0

Cited by 11 publications

(5 citation statements)

References 2 publications

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“…These measures make it possible to not only improve the quality of the rolled product but also increase labor costs, and there is always a possibility that a defect may be missed or not completely repaired. [ 6,7 ] It should be controlled carefully when performing hot mechanical scarfing to properly remove cracks. In some cases, hot scarfing can initiate new cracks or propagate existing cracks if temperature is too high.…”

Section: Introductionmentioning

confidence: 99%

“…With the continuous improvement in productivity, more and more attention has been given to the prevention of transverse corner cracks. [6,[8][9][10] There are three brittle temperature zones from the solidification temperature of steel to 600 C. The third brittle temperature zone plays a vital role in controlling the occurrence of angular transverse cracks during continuous casting. In previous studies, it was found that strain rate and deformation temperature have a significant effect on the thermoplasticity of materials.…”

Section: Introductionmentioning

confidence: 99%

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Hot Ductility and Fracture Behavior of High‐Ti Weathering Steel

Song

Gao

Xue³

et al. 2021

steel research int.

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The hot ductility behavior of high‐Ti weathering steel is studied by high‐temperature tensile testing in the temperature range of 650–1100 ºC. The results reveal a ductility trough in high‐Ti steel in the range of 650–962, 650–925, and 700–880 °C with minimum reduction in area (RA) of 22.21%, 36.53%, and 43.25% at 800 ºC and different strain rates of 1.0 × 10−3, 5.0 × 10−3, and 1.0 × 10−2 s−1, respectively. A number of secondary cracks containing S, N, and Ti propagate along the grain boundary, and the obvious preferred orientation is found in the microstructure near the fracture at 800 °C. With the increase in strain rate, the value of RA is increased in the temperature range of 650–1050 ºC, such that the probability of crack occurrence is decreased. RA does not increase with the increase in strain rate at 1100 °C and strain rate of 1.0 × 10−2 s−1. The underlying reason is that there is not adequate time for the material to recover or recrystallize with the increase in strain rate, resulting in material softening effect that is not completely reflected.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hot Ductility and Fracture Behavior of High‐Ti Weathering Steel

Song

Gao

Xue³

et al. 2021

steel research int.

View full text Add to dashboard Cite

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“…The transverse corner crack is one of the most common defects on slab surfaces during a continuous casting process; it has not yet been satisfactorily solved . Through macroscopic examination, such as a sweep inspection of the slab surface, the cracks can usually be found both on the loose‐side and fixed‐side corners of microalloyed steel slabs .…”

Section: Introductionmentioning

confidence: 99%

A Method to Control the Transverse Corner Cracks on a Continuous Casting Slab by Combining Microstructure Analysis with Numerical Simulation of the Slab Temperature Field

Yang

Zhang

Lai

et al. 2018

steel research int.

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In the current article, a method based on analysis of the microstructure combined with numerical simulation of the temperature field of a continuous casting slab is proposed to eliminate the transverse cracks occurred in slab corners. The microstructures near the cracks will be varied as the phase‐transformation conditions change. Thus, the cracking temperature range can be effectively estimated by analyzing the microstructures near the cracks. The different behaviors of microstructures near cracks in three conditions are presented and discussed. These behaviors include the following: the decarburization layer is symmetrically distributed on both sides of the cracks; the microstructures are refined near the cracks; the cracks “open” the ferrite along the austenite grain boundaries, which results in the ferrite being symmetrically distributed on both sides of the cracks. The variation of the slab corner temperature during a continuous casting process is calculated and discussed. Then, a secondary cooling adjustment scheme is proposed to eliminate the occurrence of transverse corner cracks on the slab surface. Results from industrial practice show that the method can effectively avoid the generation of slab surface cracks without damage to the internal quality of the slab. The method can also be applied to other studies of crack control.

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“…[1][2][3] During the bending and straightening operation of the slab continuous casting process with a curved mold, an approximately 2% tensile strain at a 10 À3 -10 À4 s À1 strain rate was generated at the surface of the slab. 3,4 It was reported that at 700-900°C, a ductility trough was commonly found by using isothermal tension tests.…”

Section: Introductionmentioning

confidence: 99%

Control of Transverse Corner Cracks on Low-Carbon Steel Slabs

Zhang

Yang

et al. 2014

JOM

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In this article, the formation mechanism of transverse corner cracks on a lowcarbon steel continuous-casting slab was investigated. The factors influencing the transverse corner cracks were discussed. The hot ductility of the lowcarbon steel within 600°C and 1250°C was detected using a thermal simulator Gleeble 1500 (Dynamic Systems, Inc., Poestenkill, NY) to determine the embrittling temperature range of the steel. The temperature of the slab varied with time, especially at the slab corner, and it was calculated and discussed. It was found that transverse corner cracks were generated on the ferrite films along grain boundaries, and there was little decarburization layer near the cracks. According to the calculated temperature at slab corner, the cooling water flow rate and cooling strategy were optimized by adjusting the cooling water flow rate at each spray cooling zone to avoid the embrittling temperature range at the bending and straightening segments of the caster. As a result, the transverse corner cracks were successfully weakened.

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Studies of the conditions of formation of transverse corner cracks on the surface of continuous-cast slabs

Cited by 11 publications

References 2 publications

Hot Ductility and Fracture Behavior of High‐Ti Weathering Steel

Hot Ductility and Fracture Behavior of High‐Ti Weathering Steel

A Method to Control the Transverse Corner Cracks on a Continuous Casting Slab by Combining Microstructure Analysis with Numerical Simulation of the Slab Temperature Field

Control of Transverse Corner Cracks on Low-Carbon Steel Slabs

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