External factors in the manufacture of welded rail joints have a significant impact on the quality of the welded joint, which leads to the formation of a defect in the form of the thermite metal typical crystal structure violation, followed by a rail welded joint fracture. The macrostructure of the metal surface in the defect zone “Inhomogeneous metal inclusions” contains looseness, slag and micropores accumulations. The defect, as a rule, is located in a plane running vertically along the center of the weld in the region of the base and the lower part of the rail web, perpendicular to the longitudinal axis of the rail. In the course of the research, an analysis of the possibility of detecting a defect in the form of “Inhomogeneous metal inclusions” was made by the ultrasonic method of testing using an ultrasonic flaw detector, for local testing and with phased arrays, during acceptance trial, as well as the possibility of detecting a defect by an ultrasonic testing method using a method different from the accepted. The results of experimental studies using capillary and magnetic particle inspection methods are presented to confirm and visualize a defect on a welded joint fragment, followed by the welded rail joint fragments’ macrostructure and microstructure studies in the place of an internal defect and in a defect-free area.
Analysis of the Possibility of Detecting Inhomogeneous Metal Inclusions in Welded Joints of Rails Under Ultrasonic Control
Lect. Notes in Networks, Syst.
International Scientific Siberian Transport Forum ; 2021 May 11, 2021 - May 14, 2021
International Scientific Siberian Transport Forum TransSiberia - 2021 ; Chapter : 73 ; 674-682
2022-03-19
9 pages
Article/Chapter (Book)
Electronic Resource
English
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