Failure Reason Analysis of Temperature Casing in Supercritical/Ultra Supercritical Boiler
Author of the article: LI Penggang1, WANG Qiang2
Author's Workplace：1. Huadian Electric Power Research Institute Co., Ltd., Hangzhou 313300, China; 2. Xi’an Thermal Power Research Institute Co., Ltd., Xi’an 710054, China
Key Words： temperature casing; fracture; failure; fatigue; crack
Abstract：
In order to understand the fracture reason of the temperature sleeve of the supercritical boiler, the failure reason
of the temperature sleeve of the supercritical boiler was analyzed by means of macroscopic examination, chemical
composition analysis, metallographic examination, hardness measurement, fracture morphology analysis and ANSYS finite
element analysis. The results show that the fatigue crack of the temperature casing is initiated under the action of
alternating stress, and the fatigue crack is extended continuously, which finally causes the casing fracture.
