ULTRASONIC CHECKING OF INSTALLED RAILWAY RAILS WITH THE UTILIZATION OF ELECTROMAGNETIC ACOUSTIC CONVERTERS

UL'TRAZVUKOVOI KONTROL' ZHELEZNODOROZHNYKH REL'SOV ULOZHENNYKH V PUT'S ISPOL'ZOVANIEM ELEKTROMAGNITNO AKUSTICHESKIKH PREOBRAZOVATELEI

Magnetic and ultrasonic flaw detectors are applied for the mobile checking of rails. The test car's flaw detector has the deficiencies of relatively low sensitivity to defects within the railhead, at 7 mm. and over from the surface, to small defects, and also can not reveal defects in the web of the rail. A trait of the magnetic flaw detector is the possibility of operation in a wide range of temperatures and at high speeds, without moistening the rolling surface of the rail. The ultrasonic railcar flaw detector is more sensitive to small defects and reveals defects in the web of the rail. Its main deficiency is the necessity of applying liquids (usually water or alcohol) for the insurance of acoustical contact between the probe and the object checked. The quality of the acoustical contact depends upon the uniformity of the liquid inflow, the level of turbulence of the flow, and upon the accumulation of dirt on the rails. Figures include a plan of the excitation of ultrasonic oscillations with the aid of the electromagnetic acoustical converter, a plan of the searching system, and a block plan of the apparatus.

  • Availability:
  • Supplemental Notes:
    • Full translation available for reference purposes at the Office of R&D, FRA. Contact Technology Planning Officer.
  • Corporate Authors:

    Plenum Publishing Company

    227 West 17th Street
    New York, NY  USA  10011
  • Authors:
    • Vlasov, V V
  • Publication Date: 1971

Language

  • Russian

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00130269
  • Record Type: Publication
  • Source Agency: Federal Railroad Administration
  • Files: TRIS, USDOT
  • Created Date: Dec 1 1977 12:00AM