A mold simulator for continuous casting of steel: Part II. The formation of oscillation marks during the continuous casting of low carbon steel

AbstractThe surface quality of slabs is closely related with the initial solidification at very first seconds of molten steel near meniscus in mold during continuous casting. The solidification, structure, and free deformation for given steels have been investigated in droplet experiments by aid of Laser Scanning Confocal Microscope. It is observed that the appearances of solidified shells for high carbon steels and some hyper-peritectic steels with high carbon content show lamellar, while that for other steels show spherical. Convex is formed along the chilling direction for most steels, besides some occasions that concave is formed for high carbon steel at times. The deformation degree decreases gradually in order of hypo-peritectic steel, ultra-low carbon steel, hyper-peritectic steel, low carbon steel, and high carbon steel, which is consistent with the solidification shrinkage in macroscope during continuous casting. Additionally, the microstructure of solidified shell of hypo-peritectic steel is bainite, while that of hyper-peritectic steel is martensite.

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Heat Treatment Conditions of Low Carbon Steel Part Used in the Deep Sea

29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 6 ◽

10.1115/omae2010-20172 ◽

2010 ◽

Author(s):

Sang-Seop Lim ◽

Chung-Gil Kang

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Carbon Steel ◽

Deep Sea ◽

Low Carbon Steel ◽

High Strength ◽

Steel Part ◽

Heat Treatment Condition ◽

Low Carbon ◽

Oil Consumption

With increasing oil consumption, we have to find more oil resources in the deep sea. The extreme working condition of the deep sea requires high toughness and high strength values at low temperatures. Academic institutions limited the chemical composition of the requested casting steel to meet their requirements of fracture toughness and weldability. Thus, the carbon content was set approximately 0.10% based on classification societies which required specific mechanical properties of strength, elongation, reduction area and impact energy (−40°C). In this study, we find the optimal heat treatment condition of low carbon steel (0.10%C) to obtain the desired mechanical properties at low temperature (−40°C) according to different quenching parameters (heating times) and tempering parameters (heating temperatures, cooling methods).

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Development of new-generation low-carbon steel: Part II-wear behaviour

The Philosophical Magazine A Journal of Theoretical Experimental and Applied Physics ◽

10.1080/14786435.2019.1606467 ◽

2019 ◽

Vol 99 (16) ◽

pp. 1970-1992

Author(s):

Amir Raza Subhani ◽

Dipak Kumar Mondal ◽

Joydeep Maity

Keyword(s):

Carbon Steel ◽

Low Carbon Steel ◽

Steel Part ◽

Wear Behaviour ◽

Low Carbon ◽

New Generation

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Optimization of Submerged Entry Nozzle Depth in CC Mould / Optymalizacja Zanurzenia Wylewu W Krystalizatorze Cos

Archives of Metallurgy and Materials ◽

10.1515/amm-2015-0467 ◽

2015 ◽

Vol 60 (4) ◽

pp. 2927-2932

Author(s):

J. Pieprzyca ◽

T. Merder ◽

M. Saternus

Keyword(s):

Carbon Steel ◽

Continuous Casting ◽

High Carbon Steel ◽

Low Carbon Steel ◽

Submerged Entry Nozzle ◽

Casting Process ◽

Low Carbon ◽

High Carbon ◽

Steel Continuous Casting

The way and speed of steel flux flowing into mould of continuous casting (CC) machine belong to the important parameters characterizing the steel continuous casting process. Such flux causes determined kinds of steel circulation, which together with simultaneous steel crystallization influence the creation of ingots primary structure and quality of its surface. The article presents the results of modelling research which aim was to determine the optimal location of submerged entry nozzle in square moulds (130 x 130 mm and 160 x 160 mm) of CC machine. Such a research was carried out for two different grades of steel (low-carbon steel and high-carbon steel), which feature different parameters of casting.

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