10.14489/td.2016.07.pp.033-042

2016, 07 July

DOI: 10.14489/td.2016.07.pp.033-042

Voronkova L.V., Kachanov V.K., Sinitsin A.A.
THE APPARATUS FOR ULTRASONIC TESTING THE PRODUCTS MADE OF CAST IRON
(pp. 33-42)

Abstract. The article reviews the existing devices for cast iron ultrasonic structuroscopy. Design principles has been analyzed concerning the devices that allow to determine cast iron type by measuring ultrasonic waves velocity via echo and through-transmission methods. It is shown that one can only determine overall product properties by ultrasonic wave’s velocity measurement, but not all the properties. Also, measurements with predetermined ultrasonic wave frequency allow to control the only products where the size of carbon inclusions is less than the ultrasonic wavelength. The variety of cast iron properties requires the individual approach to each product which is provided by research and measurement of ultrasonic device, where signal properties are calibrated to match each products made of cast iron and different signal processing techniques are implemented. Usage of ultrasonic research of multifunctional adaptive devices is explained with the example of structuroscopy of cast iron mold exposed to thermal cycling. It is shown that it is necessary for high frequency chirp-signals to increase sensitivity and space-time signal processing to increase structural noise to signal ratio. Acquired results allow to determine a threshold ultrasound wave velocity before cast iron mold breakdown.

Keywords: ultrasonic control, structuroscopy, cast iron, multifunctional adaptive devices.

+ - About the Authors Click to collapse

L. V. Voronkova (JSC “RPA “CNIITMASH”, Moscow, Russia)
V. K. Kachanov, A. A. Sinitsin (National Research University Moscow Power Engineering Institute, Moscow, Russia)

+ - References Click to collapse

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