Diagnostics of parts of the subway electromotive-power fleet

Results of a study of the technical condition of worked-out parts (wheelpair axles, gears, etc.) of the subway rolling stock produced from steel are presented. The use of optical fractography, metallography, and traditional and novel methods of nondestructive control allowed the authors to determine...

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Bibliographic Details
Published in:Metal science and heat treatment 2000-05, Vol.42 (5), p.189-196
Main Authors: Pudovikov, E I, Zastava, A P, Kuzmichev, B P, Posysaeva, L V, Ilyushchenkova, N Y, Lazarev, V L
Format: Article
Language:English
Subjects:
Axles
Damage
Defects
Diagnostic systems
Fractography
Fracture mechanics
Steels
Studies
Subways
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Summary:Results of a study of the technical condition of worked-out parts (wheelpair axles, gears, etc.) of the subway rolling stock produced from steel are presented. The use of optical fractography, metallography, and traditional and novel methods of nondestructive control allowed the authors to determine the defects that appear in various stages of production, service, and repair of the parts and analyze the causes of crack formation and fracture, and in some cases to recommend effective measures for preventing the defects. The study was begun with nondestructive control of broken and newly produced parts, which was followed by the investigation of their appearance, fracture surfaces, and damaged or worn surfaces with the use of the results of chemical and metallographic analysis if required. Also, the causes of the appearance of cracks in aluminum wheelpair parts of subway vehicles are considered. It is shown that the use of ultrasound control and eddy current control increases considerably the quality of the repaired bodies of reduction gearboxes. Recommendations are given on advancing the metallurgical quality of the material and increasing the operational reliability of bodies of reduction gearboxes.
ISSN:0026-0673
1573-8973
DOI:10.1007/BF02469848