Fatigue failure of a boiler feed pump rotor shaft

被引：12

作者：

Das, G ^{[1
]}

Ray, AK ^{[1
]}

Ghosh, S ^{[1
]}

Das, SK ^{[1
]}

Bhattacharya, DK ^{[1
]}

机构：

[1] Natl Met Lab, Jamshedpur 831007, Bihar, India

来源：

ENGINEERING FAILURE ANALYSIS | 2003年 / 10卷 / 06期

关键词：

shafts; fatigue; weld repairs; residual stress; defects;

D O I：

10.1016/S1350-6307(03)00047-5

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This paper deals with a detailed failure investigation of a rotor shaft in a boiler feed pump of a thermal power plant. The investigation mainly included chemical analysis, microscopy, fractography, hardness measurement and residual stress measurement. Analysis revealed that the metallization processes was primarily responsible for the failure. There were a large number of defects at the interface where the metallization process was terminated near the fillet. The crack had initiated from one or more such defect areas and then further propagated by fatigue. The mode of fracture was fatigue and the presence of oxides at the base of the cavities at the interface regions indicated that surface preparation was not made properly prior to metallization. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：725 / 732

页数：8