SYMPOSIA PAPER Published: 28 November 2014
STP158020140076

Non-Metallic Inclusion Density in Bearing Steel Characterized by Ultrasonic Testing

Source

The ASCO Industries (Hagondange, France) ultrasonic testing equipment gives us the possibility to control the steel in the tank with several high frequencies: 10, 20, 40, and 80 MHz. Depending on the objectives of the control, we are able to adapt the conditions to optimize the results. These controls provide quality indexes to sort our castings and to supply our customers according to their specifications. Because of the presence of debondings around the sulfides, these reflectors have the same C-scan representation as the oxide. However, these two kinds of inclusions have a different influence on the fatigue properties, especially in the case of bearing applications. A method based on signal processing was developed to discriminate the two different reflectors from results obtained with an ultrasound control in tank with an 80-MHz sensor.

Author Information

Midroit, F.
Asco Industries CREAS, Hagondange Cedex, FR
Merchi, F.
Asco Industries CREAS, Hagondange Cedex, FR
Meheux-Millot, M.
Asco Industries CREAS, Hagondange Cedex, FR
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: A01
Pages: 1–10
DOI: 10.1520/STP158020140076
ISBN-EB: 978-0-8031-7606-5
ISBN-13: 978-0-8031-7605-8