Effects of Cr Addition on Coarse Columnar Austenite Structure in As-Cast 0.2 mass% Carbon Steel

Tsuchiya, Shingo; Ohno, Munekazu; Matsuura, Kiyotaka; Isobe, Kohichi

doi:10.2355/isijinternational.50.1959

Cited by 5 publications

(3 citation statements)

References 10 publications

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“…4 and 6, it is evident that small d initial and/or high T  results in a wide range of the discontinuous growth region, in other words, a strong tendency for the CCG formation. In fact, our recent experimental study on rapid unidirectional solidification of a hyperperitectic carbon steel demonstrated that the as-cast  grain structure changes from CCG to equiaxed grain structure due to the reduction of T  associated with Cr addition [26].…”

Section: Condition For Occurrence Of Discontinuous Grain Growthmentioning

confidence: 99%

Formation conditions of coarse columnar austenite grain structure in peritectic carbon steels by the discontinuous grain growth mechanism

2011

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The discontinuous grain growth leading to a coarse columnar austenite grain (CCG) structure in as-cast peritectic carbon steels is analyzed by means of two- and three-dimensional phase-field simulations. On the basis of theory of grain growth, the conditions for discontinuous grain growth to occur is elucidated in terms of cooling condition and material properties. The theoretical analysis well explains the results of the phase-field simulations and it should be useful in predicting the formation of the CCG structure in continuously-cast slabs

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Section: Condition For Occurrence Of Discontinuous Grain Growthmentioning

confidence: 99%

Formation conditions of coarse columnar austenite grain structure in peritectic carbon steels by the discontinuous grain growth mechanism

2011

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“…At present, the studies on the effect mechanism of C content on the hot ductility of steel focus on the growth mechanisms and refinement of the coarse columnar austenite grains on the slab surface of hypoperitectic steel during solidification. [52][53][54][55] P and S Segregation at Grain Boundary: P and S are easy to form interdendritic microsegregation. During continuous casting, because the solute distribution coefficient in liquid at the front of the dendrite is significantly greater than that of solid, P and S elements are gradually enriched at the boundary of the dendrite, especially in the trough of oscillation marks on slab surface due to the coarse grain size and the low heat transfer rate.…”

Section: Chemical Composition and Segregationmentioning

confidence: 99%

Section: Formation Causes Of Transverse Corner Cracksmentioning

confidence: 99%

Formation Mechanism and Control Technology of Transverse Corner Cracks During Slab Continuous Casting of Microalloyed Steels

Zhu,

Cai

2023

steel research int.

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Microalloyed steel with Nb, V, Ti, and other alloying elements is one of the important steel grades in the steel industry. During continuous casting process, high occurrence rate of transverse corner cracks in slabs restricts the quality and efficiency of the production of microalloyed steel grades, and it has not been effectively solved for a long time. Herein, the research progress on the formation mechanism, influential factors, and typical control technologies of transverse corner cracks during slab continuous casting are reviewed. Considering high‐temperature solidification process of microalloyed steel, the control of growth of microstructures and the precipitation behavior of carbonitrides in slab corners are supposed to be the key to avoid transverse corner cracks during slab continuous casting.

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Phase-Field Simulations and Analysis of Effect of Dispersed Particles on Migration of Delta to Gamma Transformation Interface

Sato

Ohno

Matsuura

2014

Metall Mater Trans A

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Retardation effect of dispersed inert particles on delta-gamma interface migration in carbon steels during isothermal delta to gamma transformation is analyzed by two-dimensional phase-field simulations. The effect is systematically investigated for different values of particle radius, r, particle spacing, l, and initial carbon concentration of delta phase. The retardation effect becomes stronger when the pinning parameter described by r/l 2 is larger and the carbon concentration of delta phase is higher, indicating that delta to gamma transformation kinetics can be retarded in a similar way to the pinning effect on grain growth kinetics.

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Effects of Cr Addition on Coarse Columnar Austenite Structure in As-Cast 0.2 mass% Carbon Steel

Cited by 5 publications

References 10 publications

Formation conditions of coarse columnar austenite grain structure in peritectic carbon steels by the discontinuous grain growth mechanism

Formation conditions of coarse columnar austenite grain structure in peritectic carbon steels by the discontinuous grain growth mechanism

Formation Mechanism and Control Technology of Transverse Corner Cracks During Slab Continuous Casting of Microalloyed Steels

Phase-Field Simulations and Analysis of Effect of Dispersed Particles on Migration of Delta to Gamma Transformation Interface

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