Evaluation of the damage to continuously cast steel in bulging of the crust of the billet between the support rolls of the continuous casting machine

1988 ◽  
Vol 20 (3) ◽  
pp. 371-377
Author(s):  
A. A. Bogatov ◽  
S. P. Krotov ◽  
G. N. Migacheva ◽  
A. V. Grachev
Keyword(s):  
Continuous Casting ◽  
Cast Steel ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
Continuously Cast

scholarly journals Study of the Influence of Intermix Conditions on Steel Cleanliness

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 852 ◽  
Author(s):  
Branislav Bul’ko ◽  
Marek Molnár ◽  
Peter Demeter ◽  
Dana Baricová ◽  
Alena Pribulová ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Negative Impact ◽  
Cast Steel ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
Chemical Compositions ◽  
Negative Effect ◽  
Type Size ◽  
Steel Cleanliness ◽  
Steel Grades

Modern steel plants produce today a large portfolio of various steel grades, many for end-uses demanding high quality. In order to utilize the maximum productivity of the continuous-casting machine, it is sometimes necessary to cast steel grades with different chemical compositions in one sequence. It is important, therefore, to know the possibilities of a specific continuous-casting machine to make the Intermix connections as short as possible. Any interference with established procedures may, however, have a negative impact on the cleanliness of the cast steel. Using physical and numerical simulation tools, it was found that reducing the steel level in the tundish during the exchange of ladles makes it possible to shorten the transition zone. However, when the steel level is reduced, the flow of steel is impaired, which can have a negative effect on the cleanliness of the cast steel and, in extreme cases, may even lead to entrapment of slag in the mold. The cleanliness of cast steel was evaluated using one of the most advanced tools for automatic steel cleanliness evaluation, AZtecFeature (Oxford Instruments, Abingdon, UK), which enables determination of the type, size, distribution, and shape, as well as the chemical composition, of individual types of non-metal inclusions.

Systematic Examination of Metallographic Methods for Detection of Primary Steel Texture

2008 ◽  
Vol 589 ◽  
pp. 25-30
Author(s):  
Ibolya Kardos ◽  
Balázs Verő ◽  
Zsolt Csepeli ◽  
Mihály Réger
Keyword(s):  
Continuous Casting ◽  
Structural Investigation ◽  
Personal Information ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
The State ◽  
New Methods ◽  
Systematic Examination ◽  
Continuously Cast ◽  
Points Of View

In spite of speedy development of technical tools for examination, the importance of macro structural investigation has not decreased; on the contrary, these methods are in the state of their revival. One of evident reasons for it is the fact, that the results of macro structural examinations and the conclusions drawn from them are in the closest relation with the parameters of technology, reflect their changes, and the deviations from the specified values. It is expedient from time to time to check the methods proved earlier suitable for macro structural investigation, possibly to develop and implement new methods. We have to take in account that the methods now widely applied were developed when the technology, composition, type and quantity of pollutants were still basically different from those of the present. We mention as an example that in the fundamental work of George F. Vander Voort published in 1984 the examinations of macrostructure of continuously cast semi products occupied hardly one to two pages, while nowadays they produce about 90% of the annual 1.1 billion tonne steel quantity in continuous casting plants, thus the decisive proportion of continuously cast semi products examination can hardly be questioned. Taking in consideration the above points of view, in the frame of a consortium work we examined the macrostructure of samples taken from bloom slabs cast on vertical continuous casting machine from nine consciously chosen charges, with methods known from the literature or personal information.

Position Control and Alignment of the CCM Equipment

2019 ◽  
Vol 946 ◽  
pp. 644-649 ◽  
Author(s):  
Andrei Sholomitskii ◽  
Aleksey Sotnikov
Keyword(s):  
Continuous Casting ◽  
Position Control ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
Cast Ingot ◽  
Different Types ◽  
Continuously Cast ◽  
Improved Technology ◽  
The Mathematical Model

The improved technology of position control and alignment of the continuous casting machine (CCM) equipment based on high-precision online geodetic measurements is considered. The mathematical model for the technological axis of the continuous casting machine, the technique of the rational alignment of the machine’s equipment and the software implementing this technique are proposed. The application experience of the developed technique for control and aligning the equipment of continuous casting machines of different types is shown. The data on the efficiency of the technique for continuous casting machine equipment and its impact on the quality of a continuously cast ingot are presented.

scholarly journals Directions of development of production of small- size billets for long products

2018 ◽  
pp. 259-274
Author(s):  
V.G. Gerasimenko ◽  
L.S. Molchanov
Keyword(s):  
Continuous Casting ◽  
Rolling Mill ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
Transfer Scheme ◽  
Effective Option ◽  
Continuously Cast ◽  
The Difference ◽  
High Temperature Furnaces ◽  
Decarburized Layer

The aim of the work is to study the technological features of the transfer of metallurgical enterprises to the production of small-size and wire metal products from continuously cast billets. The main parameters of the rolling technology are considered: the size of the billet, the choice of the location of the continuous casting machine, the transfer scheme of continuously cast billets to small- size and wire mills. It is shown that when using a continuously cast square billet with a size of 130x130 mm and 150x150 mm, direct combination of a continuous casting machine with a rolling mill is almost impossible due to the difference in the speed of continuous casting and the roughing group of the mill. The performed calculations show that the scheme of cutting the billets and combining with the intermediate furnace is technologically feasible, however, further heating of the billets leads to significant energy losses. It has been established that an effective option for combining the continuous casting machine with a rolling mill is to use a complex of equipment with a furnace-thermostat for a billets 120 m long. This flowchart reduces the energy consumption for heating the billets by at least 53%. The proposed technology of combining the continuous casting machine with a rolling mill will provide metal savings by reducing the thickness of the scale to 0.4-0.73 mm (an average of 1.1% of the mass of the billet), improve its quality by reducing the depth of the decarburized layer from 1.1 mm to 0.3 mm. The technology provides for the transportation of liquid steel in the ladle from the steel-smelting shop, casting on the continuous casting machine, identification of defects in the billets in a hot condition, supply of the billets with a temperature of 8500С to high-temperature furnaces for heating and subsequent rolling.

Study on Continuous Casting of Steel by Sizes

2012 ◽  
Vol 188 ◽  
pp. 285-292
Author(s):  
Erika Ardelean ◽  
Marius Ardelean ◽  
Florin Drăgoi ◽  
Erika Popa
Keyword(s):  
Continuous Casting ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
Continuous Casting Of Steel ◽  
High Productivity ◽  
Cast Product ◽  
Continuously Cast ◽  
Close Form ◽  
Continuous Casting Plant

Continuous casting of steel has gradually replaced traditional casting, due to many advantages such as: casting to a close form to the finished product, low steel losses, the possibility of sequential casting of steel, high productivity, quality of continuously cast product. To benefit of all these advantages, the continuous casting machine must be flexible relative to the demands of customers. This paper presents a comparative analysis relative to main parameters of steel continuous casting for more type of semi-finished product, by processing of data collected from a continuous casting plant with five casting wires. From this study, can be pointed reliable conclusions relatively to the correlation of casting factors and the operating parameters for casting machine and with quality indicators for semi-finished continuous casting product.

The Mathematical Model of Radial Forging of a Hollow Continuously-Cast Ingot

2000 ◽  
Author(s):  
Nikolai A. Babailov ◽  
Serguey P. Bourkine
Keyword(s):  
Mathematical Model ◽  
Continuous Casting ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
Combined Loading ◽  
Radial Forging ◽  
Technological Parameters ◽  
Cast Ingot ◽  
Continuously Cast ◽  
The Mathematical Model

Abstract The problem of a detailed research of radial forging is associated with the technological process of direct combination of continuous casting and metal forming. The mathematical model of multi-die radial forging is developed. The strain state of radial forging is investigated. The dependences of main characteristics on technological parameters for radial forging with combined loading (torsion, tension or backing) are received by the variational method. The thermal analysis of hollow continuously cast ingot during deformation is executed. The verification of mathematical model adequacy is executed by experimental researches. The design of six-dies forging unit for direct combination with vertical continuous-casting machine is developed.

scholarly journals Investigation of internal defects formation reasons in copper billet obtained at rotary continuous casting machine (CCM)

2020 ◽  
Vol 28 (1) ◽  
pp. 48-54
Author(s):  
A.N. Smirnov ◽  
◽  
V.E. Ukhin ◽  
A.P. Verzilov ◽  
Ali Naseri ◽  
...  
Keyword(s):  
Continuous Casting ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
Internal Defects
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