Root Cause Analysis of Tube Weld Failure of the Lubrication Oil Cooling Tube in Thrust Bearing of Pump

Abstract:

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Dissimilar weld region located at the cooling tube of pump was damaged and failed. We performed a root cause analysis using the Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy for the fractured surface. Many internal defects were shown in the fracture section. Root cause analysis shows that the failure is due to welding at higher temperature over 1000. This was confirmed by high-temperature cracks observed with SEM. In this study Failure scenario including initial crack generation, propagation of corrosion cracks and final failure, has been constructed and verified.

Info:

Periodical:

Key Engineering Materials (Volumes 326-328)

Edited by:

Soon-Bok Lee and Yun-Jae Kim

Pages:

1247-1250

DOI:

10.4028/www.scientific.net/KEM.326-328.1247

Citation:

M. H. Boo and C. Y. Park, "Root Cause Analysis of Tube Weld Failure of the Lubrication Oil Cooling Tube in Thrust Bearing of Pump", Key Engineering Materials, Vols. 326-328, pp. 1247-1250, 2006

Online since:

December 2006

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Price:

$35.00

[1] Y.S. Park: Metal Corrosion (Mineam Publications, Korea, 1988).

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