The Practice of Electromagnetic Stirring Technology in Continuous Cast Steel
Abstract
Electromagnetic stirring technology has been widely applied in production, and its application in special steel continuous cast machine not only improves the quality of steel but also greatly reduces the cost of production. With the development of science and technology, the application of electromagnetic stirring technology for continuous cast steel has greatly improved the quality of continuous cast steel. This paper summarizes the current progress in the application of electromagnetic stirring technology in continuous cast steel and its advantages and disadvantages, and at the same time proposes the future research direction of this field.
Keywords: electromagnetic stirring; continuous cast steel; characteristics
1 Introduction
Continuous casting is an important process used to produce high-quality steel and is widely used in many industries such as structure steel, automotive industry, tool steel and other industries. In order to improve the quality of continuous cast steel, electromagnetic stirring technology is used in the continuous casting process. Electromagnetic stirring technology can improve the homogeneity of steel, reduce the segregation and grain distance of steel, reduce the hydrogen content and refine the grain structure. Therefore, the application of electromagnetic stirring technology in continuous casting process has attracted the attention of the industry. In this paper, we will introduce the Principle of Electromagnetic Stirring Technology and its application in Continuous Cast Steel.
2 Principle of Electromagnetic Stirring Technology
Electromagnetic stirring is the process of applying a magnetic field to the molten metal inside the mold of the continuous casting machine by controlling the current and exciting the medium to generate propulsion, which helps to mix the molten metal and improve the flow property.
The working principle of electromagnetic stirring is as follows: when a powerful electromagnet is placed below the mold and the medium is charged and excited through a control system, the continuous casting machine produces a large current, and the effect of electromagnetic force is produced which has a powerful stirring effect on the molten metal inside the mold, resulting in the increase of the homogeneity of the molten metal, finer grain size and better flow properties.
3 Application of Electromagnetic Stirring Technology
in Continuous Cast Steel
3.1 Advantages of Application
The application of electromagnetic stirring technology in continuous cast steel has a variety of advantages, such as improvement of homogeneity, refinement of grain structure, reduction of weld porosity and porosity, improvement of flow properties and reduction of casting costs.
First of all, with the application of electromagnetic stirring technology, the homogeneity and mobility of molten steel can be improved. The directionality of solidification speed can be eliminated to make the internal microstructure and mechanical properties of steel uniform; the melt segregation can be reduced, the grain distance can be reduced, and the grain distribution and grain orientation can be improved.
Second, with the application of electromagnetic stirring technology, the grain structure of steel can be refined, so that it can meet the technical indicators of finished products, and the product quality can be effectively improved.
Third, the application of electromagnetic stirring technology can reduce the hardness and weld porosity of steel, and reduce the occurrence of casting defects such as deformation and cracking of materials.
Fourth, the application of electromagnetic stirring technology can improve the flow properties of molten steel, reduce the pouring difficulty, improve the accuracy of casting process and ensure the high quality of products.
3.2 Disadvantages of Application
Although it has many advantages, the application of electromagnetic stirring technology also has certain disadvantages.
First of all, the operation cost of the technology is quite high. The cost of equipment and installation are higher, and the process of using the technology will also increase the power consumption, which increases the operating cost of the continuous casting machine.
Second, the electromagnetic stirring technology is sensitive to the molten steel quality. The molten steel should have a certain degree of desulfurization and degassing, and the wettability should also be good. These requirements can increase the difficulty of control and increase the cost of the technology.
Third, because electromagnetic stirring technology needs to be supported by other auxiliary technologies, such as monitoring systems, it requires a higher operation.
Fourth, the electromagnetic stirring system is easy to cause short circuit, short circuit failure and electrical shock. Therefore, it is necessary to pay attention to safety during operation and maintain the system regularly.
4 Future Research Direction
With the development of technology, the application of electromagnetic stirring technology in continuous cast steel is getting better and better. In recent years, many studies have focused on the development of new electromagnetic stirring systems and systems, the optimization and improvement of the electromagnetic stirring process, the improvement of steel quality and the improvement of production efficiency.
In the future, it is necessary to continuously optimize and improve the control method, stirring force and stirring time of electromagnetic stirring system to more accurately control the performance of steel. In addition, it is also important to find a way to reduce the cost, further improve the performance and reliability of the system, and improve the safety of the technology.
5 Conclusion
In conclusion, the application of electromagnetic stirring technology in continuous cast steel not only improves the quality, homogeneity and mobility of steel, but also reduces the cost of production. However, the application of the technology has certain disadvantages, such as high cost and short circuit. Therefore, it is still necessary to further optimize and improve the technology in the future.
