Failure Analysis on Spring of Boiler Drum Safety Valve

被引：1
|
作者：
Feng, Yanting [1 ]
Sun, Peng [1 ]
Xu, Xuexia [1 ]
Chen, Hongbin
机构：
[1] Hebei Elect Power Res Inst, Shijiazhuang 050021, Peoples R China
来源：
ADVANCED MATERIALS AND PROCESS TECHNOLOGY, PTS 1-3 | 2012年 / 217-219卷
关键词：
Safety valve spring; Boiler; Brittle fracture;
D O I：
10.4028/www.scientific.net/AMM.217-219.2279
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Safety valve is an important component of a boiler. The failure of its spring will bring hidden trouble to the boiler operation. The fracture failure of a drum safety valve spring of a power plant boiler was discussed based on chemical composition analysis, hardness test, metallurgical microstructure observation and SEM. Results showed that improper material selection and improper heat treatment process which led to temper brittleness contributes to the fracture. In addition, oxygen corrosion pit on the surface of the spring play an important role in promoting the cracking.
引用
收藏
页码：2279 / 2282
页数：4
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