Computational Modelling of Continuous Casting

2003 ◽  
Author(s):  
D. A. Sinton ◽  
B. R. Baliga
Keyword(s):  
Fluid Flow ◽  
Continuous Casting ◽  
Control Volume ◽  
Computational Modelling ◽  
Casting Process ◽  
Direct Chill ◽  
Liquid Interface ◽  
Thermal Fields ◽  
Solid Liquid Interface ◽  
Solid Liquid

Computer simulations of fluid flow and heat transfer phenonmena in a continuous casting process with direct-chill (DC) boundary conditions are presented and discussed in this paper. The investigation is limited to a steady-state, two-dimensional axisymmetric system, used for DC continuous casting of a zero-freezing-range aluminum-magnesium alloy (A6063). An adaptive-grid numerical method is used in these simulations. The grid is designed to delineate the solid-liquid interface using a structured adaptation technique. The fluid flow and thermal fields are predicted using a control-volume finite element (CVFEM). Comparisons of the calculated solid-liquid interface geometries with those reported in earlier experimental and numerical studies are presented in this paper. In addition, the role of natural convection in this casting process is investigated and presented.

Analytical Solution on the Relation of Technique Parameters for Continuous Casting with Heated Mould

2011 ◽  
Vol 337 ◽  
pp. 225-231
Author(s):  
Feng Ni ◽  
Shi Zhong Wei ◽  
Rui Long
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Continuous Casting ◽  
Casting Speed ◽  
Specific Conductance ◽  
Liquid Interface ◽  
Mould Temperature ◽  
Interface Position ◽  
Solid Liquid Interface ◽  
Solid Liquid

The technique of continuous casting with heated mould is a kind of near-net-shape processing technology, which combines unidirectional solidification with continuous casting and has been used widely for new material development and processing. A steady-state heat-transfer model was suggested for pure metal case. Some of modeling parameters, such as equivalent specific conductance and equivalent heat-transfer coefficient, etc, had been defined. The analytic solution of temperature profile along the axis of casting rod was obtained for solid-liquid interface to be as origin of position coordinate, by which the relations had been solved among mould temperature, casting speed, solid-liquid interface position, equivalent specific conductance between mould and metal, equivalent heat-transfer coefficient of cooling of cast rod, temperature gradient and cooling rate of melt in front of solid-liquid interface. As an example, the coordinate relations of solid-liquid interface position, mould temperature and casting speed were calculated and compared with experimental results in the case of pure copper. The calculation results conformed very well to the experimental ones. And it was indicated that the cooling rate of melt in front of solid-liquid interface had a nonlinear relation with casting speed during steady continuous casting process.

Effect of Casting Velocity on Microstructures of Almg0.9Si0.7 Alloy by Low-Superheat DC Casting

2011 ◽  
Vol 415-417 ◽  
pp. 549-552 ◽  
Author(s):  
Da Zhi Zhao ◽  
Fu Xiao Yu ◽  
Fang Liu ◽  
Ke Zhun He
Keyword(s):  
Dendritic Growth ◽  
Smooth Surface ◽  
Casting Process ◽  
Direct Chill ◽  
Pouring Temperature ◽  
Suitable Temperature ◽  
Dc Casting ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Low Superheat

The billets of AlMg0.9Si0.7 alloy, which were cast through the direct chill (DC) casting process of low superheat, were analyzed to study the effect of casting velocity on the surface quality and the morphology of primary α grains. The results show that the nucleating quantity of primary α grains in the melt is increased obviously due to the low pouring temperature during DC casting of low superheat. The suitable temperature gradient in front of the solid-liquid interface is obtained by changing the casting velocity, and the dendritic growth of the primary α grains is inhibited effectively. The billet of AlMg0.9Si0.7 alloy with smooth surface and homogeneous, fine rosette-shaped grains is obtained at the velocity of 130mm/min.

Numerical Simulation on the Influence of Heated Mold Continuous Casting Process Parameters to Solid-Liquid Interface

2012 ◽  
Vol 217-219 ◽  
pp. 2006-2011
Author(s):  
Hong Jin Zhao ◽  
Gui Huan An ◽  
Wen Feng Zeng ◽  
Xin Luo
Keyword(s):  
Numerical Simulation ◽  
Process Parameters ◽  
Casting Speed ◽  
Casting Process ◽  
Mold Temperature ◽  
Liquid Interface ◽  
Stable Operation ◽  
Operation Conditions ◽  
Solid Liquid Interface ◽  
Solid Liquid

The effect of the position and shape of solid-liquid interface on process parameters has been studied by the numerical simulation method, and the reasonable process parameters have been given. The results shows that the position and shape of solid-liquid interface is mainly affected by mold temperature, casting speed and cooling distance. It were moved to the mold export with the improvement of the mold temperature, casting speed or the reduce of cooling capacity. And the reasonable process parameters are that the mold temperature is 1363-1373 K, casting speed is 80-100mm/min, cooling distance is 40-50mm. The research results would obtain stable operation conditions and improve the billet quality.

Sign in / Sign up

Export Citation Format

Share Document