New Method of Flaw Detection in Diagnostics of Steel Forgings Using Ultrasonic Echo-Method

Abstract

A method for determining the slope of the plane point discontinuities to the ultrasound entry surface, correction factor for the sensitivity of ultrasound equipment and equivalent size of the discontinuity in diagnostics of steel forgings is developed. Parameters of ultrasonic wave reflection from the plane point scatterers located at different angles to the ultrasound entry surface are studied experimentally. Analytical dependence for determination of the tilt angle and correction factor are derived. An algorithm for evaluation of plane point discontinuities inclined to the ultrasound entry surface using amplitude characteristic is developed. To automate the flaw detection calculations a software product “NDTRT-15” is developed. Methods and software product are tested at the JSC “Luganskteplovoz” upon diagnostics of the elements of disel locomotives 2TE116U, 2TE116UD, 3TE116U by ultrasonic echo-method.