Quality control for the continuous casting process using electromagnetic transducers

• Autorzy: Kim I. S. , Son J. S. , Kim H. J. , Sung B. S.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The continuous casting process is controlled automatically because various sensors and control units are connected to the mold and lower tundish roll. The solidification point in the process has a major factor on the quality of products, but the point has been predicted depending on the inaccurate calculated results from a computer simulation until now. Therefore, the objective of this paper is to develop the EMAT sensors for the measurement of the solidification point made by a through transmission technique based on the relationship between ultrasonic speed and measured temperature. Design/methodology/approach: The EMAT sensor is composed of an Elongated Spiral (ES) forming an eddy current and a permanent magnetic core generating a static magnetic field. ES coils of the sensor to measure 0.08mm, 0.2mm and 0.45mm as solidification points were employed respectively. Probes for receiving and transmitting which included 4 permanent magnets measuring 5 x 5 x 10mm, were placed together in one unit. Each coil was used to magnetic cores measuring 0.08mm and 0.45mm wound around it forty three times. The AI 75 x 75mm and 75 x 100mm simulators to identify whether the solidification point can be detected using an EMAT sensor, were machined with 2mm, 4mm, 8mm, 16mm and 32mm holes in diameter respectively. Findings: The electromagnetic interaction decreases in a high sphere of lift-off. Solidification point in a continuous casting processing could be detected through a series of tests with the use of a fabricated probe and the amplitude extent of ultrasonic wave decreases as the hole diameter of the simulators increases, Furthermore, the sensor developed is useful for measuring things such as lift-off. Research limitations/implications: A considerable amount of time and energy for miniaturization of the sensor and construction of an on-line system for a field installation should be saved by reducing mistake ratio and curtailing unnecessary processes. Originality/value: The solidification point in a continuous casting processing could be detected through a series of tests with the use of the developed EMAT sensor.

Słowa kluczowe

EN

continuous casting process; electromagnetic transducers; solidification point; measured temperature

PL

procesy odlewnicze ciągłe; przetwornik elektromagnetyczny; temperatura krzepnięcia; pomiar temperatury

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2008
• Tom: Vol. 31, nr 2
• Strony: 683--689
• Opis fizyczny: Bibliogr. 29 poz., wykr., il.

Twórcy

autor

Kim I. S.

autor

Son J. S.

autor

Kim H. J.

autor

Sung B. S.

• Department of Mechanical Engineering, Mokpo National University, Jeonnam, 534-729, Korea,

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