Simulation of a new method for supplying and stirring liquid metal in a CCM mold

A significant influence on stability of the process of filling the CCM mold with liquid metal is exerted by the structural and technological schemes and designs of used devices, modes and parameters of filling the mold with the melt. All this is due to the features of the devices used and the improvement of their design. The high requirements for such devices have determined the need to create new devices designs to reduce the time spent on preparation for work and maintenance and to improve the quality of resulting metal billets. In scientific literature, including patents, more and more articles and materials are devoted to the development of new and improvement of the existing methods of supplying and stirring liquid metal in CCM and devices for their implementation. Experimental studies of liquid metal flow in CCM are a long, complex and laborious process. Therefore, mathematical modeling by numerical methods is increasingly used for this purpose. The authors have proposed a new technology for pouring liquid metal into a mold and a device for its implementation due to the use of effect of a deep-bottom submersible nozzle rotating in the mold with eccentric outlet holes. The purpose of this work is to simulate by proven numerical method a new process of filling a rectangular CCM mold with liquid steel and stirring it. Based on the developed numerical schemes and algorithms, a calculation program was compiled. The article describes an example of calculating the steel casting into a mold of rectangular cross-section and flow diagrams of liquid metal in it.

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Mathematical modeling of filling the CCM mold with liquid metal during its supply from a rotating submersible nozzle

Izvestiya Ferrous Metallurgy ◽

10.17073/0368-0797-2021-4-302-310 ◽

2021 ◽

Vol 64 (4) ◽

pp. 302-310

Author(s):

V. I. Odinokov ◽

A. I. Evstigneev ◽

E. A. Dmitriev ◽

S. Yu. Alexandrov ◽

G. I. Usanov

Keyword(s):

Mathematical Modeling ◽

Liquid Metal ◽

Steel Casting ◽

Theoretical Calculations ◽

Rectangular Cross Section ◽

New Technology ◽

Metal Flow ◽

Experimental Studies ◽

Equations Of Mathematical Physics ◽

Difference Form

Experimental studies of the flow of liquid metal in CCM mold are long, complex and labor consuming process. Therefore, mathematical modeling by numerical methods is increasingly used for this purpose. The article considers a new technology for liquid metal supply into a mold. The authors present original patented design of the device, consisting of direct-flow and rotating bottom nozzles. The main results of investigations of the melt flow in the mold are considered. The objects of research were hydrodynamic and heat flows of liquid metal at new process of steel casting into a CCM mold of rectangular section. The result is spatial mathematical model describing flows and temperatures of liquid metal in the mold. To simulate the processes occurring during metal flow in the mold, special software was designed. Theoretical calculations are based on fundamental equations of hydrodynamics, equations of mathematical physics (equation of heat conduction taking into account mass transfer) and proven numerical method. The area under study was divided into elements of finite dimensions; for each element, resulting system of equations was written in difference form. The results are fields of velocities and temperatures of metal flow in the mold volume. A calculation program was compiled based on developed numerical schemes and algorithms. An example of calculation of steel casting into a mold of rectangular cross-section, and flow diagrams of liquid metal along various sections of the mold are given. Vector flows of liquid metal in different sections of the mold are clearly presented at different angles of rotation of the deep-bottom nozzle. The authors have identified the areas of intense turbulence. Metal flows of the described technological process were compared with traditional metal supply through a fixed bottom nozzle.

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Bolts Manufacturing Technology

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.265.79 ◽

2017 ◽

Vol 265 ◽

pp. 79-85 ◽

Cited By ~ 1

Author(s):

E.S. Reshetnikova ◽

D.U. Usatiy ◽

T.V. Usataya

Keyword(s):

Metal Forming ◽

Process Development ◽

New Technology ◽

Experimental Studies ◽

High Strength ◽

Cold Forming ◽

Modeling Technology ◽

New Instrument ◽

New Process

The urgency of a new process development of cold forming of high-strength flange bolts has been shown in the article. It also points out some shortcomings of existing technologies. To improve the quality of bolts a new instrument design was developed. The research of the working tool identification impact on its resistance and stress-strain state of the workpiece was carry out. The software package DEFORM, designed for process simulation of metal forming is used in the article. The mathematical and computer modeling technology bolt stamping with flange was applied to carry out the study. Based on the conducted theoretical and experimental studies a new technology for manufacturing the flange bolts is patented.

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