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Research for Signal Analysis of 18Mn-5Cr Steel Generator Retaining Ring using Ultrasonic Wave  

Gil, D.S. (전력연구원 원자력발전연구소)
Ahn, Y.S. (전력연구원 원자력발전연구소)
Park, S.K. (전력연구원 원자력발전연구소)
Publication Information
Journal of Power System Engineering / v.14, no.2, 2010 , pp. 65-70 More about this Journal
Abstract
Retaining rings are used to support the field winding end turns from the centrifugal force by the high speed of the field and these are the overstressed parts among the generator parts. There have been several retaining failures in Europe and America, all attributable to stress corrosion cracking in 18Mn-5Cr steel. Since then, each manufacture companies have developed a good 18Mn-5Cr steel in temperature, strength characteristic and it is used in many field now. From many findings and test results, we could conformed that the failure might be grown in the overstressed condition unrelated to the moisture particle.
Keywords
Ultrasonic Wave; Generator; Retaining Ring; Signal Analysis;
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  • Reference
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