Recent Advances in Cast Iron Structure and Properties Ultrasonic Testing and Flaw Detection

Abstract:

The advantage of ultrasonic testing of iron castings prior to destructive control consists of an impressive reduction in time and costs, as well as the ability to assess the quality of the metal anywhere on the castings. According to the acoustic characteristics of cast iron it is possible to determine the form of graphite in it and its strength. The presence of chill in the metallic base and the thickness of the chilled layer is also determined by ultrasonic method. The use of electronic signal processing allows to distinguish it from high structural noise, which makes possible the testing of cast iron for a thickness of several meters. The use of transducers with phased array is the basis of the flaw detection of containers for nuclear waste from cast iron with globular graphite with a thickness of 500 mm.

• Periodical: Materials Science Forum (Volume 925)
• Pages: 499-503
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.925.499
• Online since: June 2018
• Authors: Liubov V. Voronkova
• Keywords: Cast Iron Welded Joints, Iron Castings, Structure, Temporary Resistance at Stretching, Ultrasonic Testing

References

[1] N.V. Himchenko, V.N. Prikhodko, Ultrasonic control of size of graphitic inclusions in gray cast iron, The Factory laboratory no. 12 (1955) 1470-1488.

[2] R. Ziegler, R. Gertner, Die Scallgereschwindigkeit als Keenzeichnendl Grobe fur die Beirteilung von Guβeisen, Giesserei 45 (10) (1958) 185-193.

[3] A. Thum, H. Ude, Die Elastizität und die Schwingungsfestigkeit des Gusseisens. [The elasticity and the fatigue strength of cast irons.], Giesserei 16 (1929) 501-513.

[4] L.V. Voronkova, Ultrasonic control of mechanical properties of cast iron castings, Factory laboratory no. 7 (1993) 26-27.

[5] V.V. Andreyev, L.V. Voronkova, F.A. Nuraliyev, V.K. Kachanov, Investigation into cast iron structure degradation in ingot mold operation by the change of its acoustic characteristics, Liteinoe Proizvod. 12 (1) (2015) 14-16.

[6] T. Shmitte, N. Chichkov, O. Nemitz, T. Hinz, D. Geller, T. Orth, H. Hocks, D. Opalla, J. Frank, Automated Ultrasonic Testing of Large Casted Cask Bodies Using Phased Array Techniques, 19th WCNDT. (2016) We.4. E.3.

[7] L.V. Voronkova, V.A. Nosov, Ultrasonic flaw detection of welding joint of cast iron tube – real possible, Kontrol'. Diagn. 3 (2010) 20-22.