Copper Mold for Continuous Casting of Steel: Modelling Strategies to Assess Thermal Distortion and Durability

2017 ◽  
Vol 754 ◽  
pp. 287-290 ◽  
Author(s):  
L. Moro ◽  
J. Srnec Novak ◽  
D. Benasciutti ◽  
F. de Bona
Keyword(s):  
Continuous Casting ◽  
Permanent Deformation ◽  
Stress Rupture ◽  
Mechanical Analysis ◽  
Cyclic Plasticity ◽  
Continuous Casting Of Steel ◽  
Copper Mold ◽  
Modelling Strategies ◽  
Durability Assessment ◽  
Damage Law

In this work the durability assessment and the permanent deformation of a copper mold for continuous casting of steel have been investigated using mathematical models based on the Finite Element method. The cyclic plasticity behavior of the material is represented by a combined kinematic-isotropic model experimentally validated. Results from thermo-mechanical analysis are in good agreement with measurements. In particular, creep effects included into the model permit the evolution of bulging near the meniscus area to be correctly predicted. A life estimation is performed considering strain-life and stress-rupture time curves according to a cumulative damage law.

scholarly journals Isothermal and Non-isothermal Crystallization Kinetics of Mold Fluxes used in Continuous Casting of Steel: A Review

2021 ◽  
Author(s):  
Rahul Sarkar ◽  
Zushu Li
Keyword(s):  
Continuous Casting ◽  
Crystallization Kinetics ◽  
Isothermal Crystallization ◽  
Steel Shell ◽  
Continuous Casting Of Steel ◽  
Copper Mold ◽  
Isothermal Crystallization Kinetics ◽  
Wide Range ◽  
Mold Fluxes ◽  
Kinetics Of

AbstractCasting powders or mold fluxes, as they are more commonly known, are used in the continuous casting of steel to prevent the steel shell from sticking to the copper mold. The powders first melt and create a pool of liquid flux above the liquid steel in the mold, and then the liquid mold fluxes penetrate into the gap between water-cooled copper mold and steel shell, where crystallization of solid phases takes place as the temperatures gradually drop. It is important to understand the crystallization behavior of these mold fluxes used in the continuous casting of steel because the crystalline phase fraction in the slag films plays a crucial role in determining the horizontal heat flux during the casting process. In this work, the existing literature on the crystallization kinetics of conventional and fluoride-free mold fluxes used in the continuous casting of steel has been reviewed. The review has been divided into two main sections viz. the isothermal crystallization kinetics and non-isothermal crystallization kinetics. Under each of these sections, three of the most widely used techniques for studying the crystallization kinetics have been included viz. thermoanalytical techniques such as differential scanning calorimetry/differential thermal analysis (DSC/DTA), the single and double hot thermocouple technique (SHTT and DHTT), and the confocal scanning laser microscopy (CSLM). For each of these techniques, the available literature related to the crystallization kinetics of mold fluxes has been summarized thereby encompassing a wide range of investigations comprising of both conventional and fluoride-free fluxes. Summaries have been included after each section with critical comments and insights by the authors. Finally, the relative merits and demerits of these methods vis-à-vis their application in studying the crystallization kinetics of mold fluxes have been discussed.

scholarly journals On the formation of fold-type oscillation marks in the continuous casting of steel

2017 ◽  
Vol 4 (6) ◽  
pp. 170062 ◽  
Author(s):  
M. Vynnycky ◽  
S. Saleem ◽  
K. M. Devine ◽  
B. J. Florio ◽  
S. L. Mitchell ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Asymptotic Methods ◽  
Continuous Casting Of Steel ◽  
Oscillation Mark ◽  
Governing Equations ◽  
Fold Type ◽  
Parameters Analysis ◽  
Oscillation Marks ◽  
Recent Experimental Work ◽  
Type Oscillation

Asymptotic methods are employed to revisit an earlier model for oscillation-mark formation in the continuous casting of steel. A systematic non-dimensionalization of the governing equations, which was not carried out previously, leads to a model with 12 dimensionless parameters. Analysis is provided in the same parameter regime as for the earlier model, and surprisingly simple analytical solutions are found for the oscillation-mark profiles; these are found to agree reasonably well with the numerical solution in the earlier model and very well with fold-type oscillation marks that have been obtained in more recent experimental work. The benefits of this approach, when compared with time-consuming numerical simulations, are discussed in the context of auxiliary models for macrosegregation and thermomechanical stresses and strains.

A mold simulator for the continuous casting of steel: Part I. The development of a simulator

2005 ◽  
Vol 36 (3) ◽  
pp. 355-371 ◽  
Author(s):  
A. Badri ◽  
T. T. Natarajan ◽  
C. C. Snyder ◽  
K. D. Powers ◽  
F. J. Mannion ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Steel Part ◽  
Continuous Casting Of Steel

Influence of the configuration of the submerged entry nozzle inner channel and electromagnetic effect within its length on the qualitative distribution of metal flows during continuous casting of steel

2021 ◽  
pp. 17-22
Author(s):  
A. Yu. Tretyak ◽  
◽  
Qiang Wang ◽  
Chun-Lei Wu ◽  
E. I. Shifrin ◽  
...  
Keyword(s):  
Quality Control ◽  
Continuous Casting ◽  
Submerged Entry Nozzle ◽  
Electromagnetic Stirring ◽  
Continuous Casting Of Steel ◽  
Electromagnetic Effect ◽  
Inner Surface ◽  
Continuously Cast ◽  
Inner Channel ◽  
Research Show

Today, the most promising and effective method of quality control of the continuously cast billets is electromagnetic stirring of the melt. In this case, an important component is the effect of the stirring on the jet in the nozzle. Moreover, as research has shown, this method is highly dependent on the configuration of the inner channel of the nozzle. Research have shown that positive or negative taper of the inner surface of the nozzle allows to obtain different results after applying EMS. Taper control completely changes the pattern of the melt flow and its deceleration in the mold, especially when it is casting of large billets. The results of the research show that minor changes in the taper of the nozzle significantly increase the effect of EMS implementation, which is observed already at 0.27 % of positive the taper and increases to 0.54%.

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