Segregation of Elements in Continuous Cast Carbon Steel Billets Designated for Long Products

Hutny, A.; Warzecha, M.; Derda, W.; Wieczorek, P.

doi:10.1515/amm-2016-0328

Cited by 11 publications

(6 citation statements)

References 4 publications

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“…According to equation 2, the segregation coefficients of carbon element at four positions (R = 15, 75, 105, and 115 mm) are 1.10, 1.08, 1.01, and 0.93, respectively. It shows a consistent variation tendency with the research on a casting billet of 0.60% C that the carbon segregation coefficient on the centerline of its cross-section is 0.890 ≤ k c ≤ 1.103 [21]. After the rolling or forging process, the macrosegregation in the casting billet can be reduced to some extent, but it cannot be avoided.…”

Section: Microstructure Evolution At Different Radial Regions Of Rollsupporting

confidence: 80%

Microstructure evolution of roll core during the preparation of composite roll by electroslag remelting cladding technology

Cao

Dong

et al. 2020

High Temperature Materials and Processes

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In the present study, the comprehensive analyses based on the numerical simulation, in situ observation, and metallographic detection were carried out for the roll core of GCr15/45 carbon steel composite roll manufactured by the new electroslag remelting cladding (ESRC) method. During the ESRC process, the temperature distributions at the different radial and longitudinal positions of the roll core have great changes due to the different degrees of heat conduction from the slag bath, as a result, various microstructure and properties were obtained at the different positions of the roll core. The results illustrated that the ESRC process tended to be stable as the composite height reached a certain value and the high-temperature austenitization process mainly occurred in the radial regions where R > 60 mm, whereas no significant changes occurred at the areas where R ≦ 60 mm. The coarse grains and few Widmanstatten structures with proeutectoid ferrite were generated in the roll core areas near the bimetallic interface, while the fine grains with more proeutectoid ferrite were obtained in the roll core area away from the interface. Therefore, a higher tensile strength and a better plasticity were obtained for the specimens away from the interface.

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Section: Microstructure Evolution At Different Radial Regions Of Rollsupporting

confidence: 80%

Microstructure evolution of roll core during the preparation of composite roll by electroslag remelting cladding technology

Cao

Dong

et al. 2020

High Temperature Materials and Processes

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“…Concentrations were determined along two measurement lines: TCB ("top layer -centre layer -bottom layer") and CS (center -lateral plane). Details of this methodology were presented in previous work [8].…”

Section: Methodsmentioning

confidence: 99%

“…Sizes of particular crystal zones at the cross-section of the continuous billet were determined based on the image of templates being subject to deep etching test. Details of this test are described in [8].…”

Section: Methodsmentioning

confidence: 99%

Archives of Metallurgy and Materials

Hutny¹,

Warzecha²,

Wieczorek³

et al. 2018

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The article presents the results of investigations performed on segregation of elements in the billets. The research were performed under standard industrial conditions, during high carbon steel production cycle.Probes (templates with the thickness of 20 mm) were taken from billets with square cross-section of 160 mm. Segregation of elements was determined based on the quantitative analysis of results performed by using spark spectrometry pursuant to PN-H-04045. Changes in concentrations of elements were analysed along two cross-sections. Element contents were performed at points distanced from each other by approx. 10 mm. The segregation of carbon, sulphur and phosphorus was determined for different billets.

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“…It does not need to disqualify a product, but it is a serious obstacle in determining the chemical composition of the axial area of a billet. It is a well-known fact that during the segregation of carbon in high-carbon steels, the axial carbon concentration is usually the highest [10][11][12][13].…”

Section: Measurement Problems When Recording the Segregation Effect Imentioning

confidence: 99%

Method of Verification of Carbon Segregation Ratio Determined with Experimental Methods

Falkus

Miłkowska-Piszczek

Krajewski

et al. 2020

Metals

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The problem of macrosegregation of alloying elements occurring during cast strand solidification in the continuous casting process is still valid; it is the subject of numerous experiments and theoretical considerations. A large percentage of this research is dedicated to carbon segregation, which, for understandable reasons, is vital for the production of high-carbon steels. The background knowledge on the mechanism of segregation occurrence indicates that it is a very complex effect, and a broad range of factors influencing the continuous casting process need to be considered. Therefore, it is difficult to translate information (provided by complex models of metal flow through a diphase area at the solidification interface of a cast strand) into practical engineering recommendations to reduce the macrosegregation effect. The presented study shows the latest research related to the carbon macrosegregation effect for selected high-carbon steel grades cast with a continuous caster. Problems related to the recording of the effect concerned have been pointed out. The second part of the paper presents the influence of selected casting parameters on carbon macrosegregation intensity when casting 160 × 160 billets with a six-strand caster. In this case, the main subject of the research was the influence of the casting speed on macrosegregation intensity. In the following step, an attempt was made to find the relationship between the cast strand structure and the distribution of carbon content on its cross-section. The ultimate objective of the presented study was to find an answer to the question on the technological capabilities of restricting the segregation effect.

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Segregation of Elements in Continuous Cast Carbon Steel Billets Designated for Long Products

Cited by 11 publications

References 4 publications

Microstructure evolution of roll core during the preparation of composite roll by electroslag remelting cladding technology

Microstructure evolution of roll core during the preparation of composite roll by electroslag remelting cladding technology

Archives of Metallurgy and Materials

Method of Verification of Carbon Segregation Ratio Determined with Experimental Methods

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