석탄화력발전용 초초임계압(USC) 보일러 수냉벽 튜브 용접 신뢰성 향상에 대한 연구Study on the Improvement of Weld-joint Reliability in Waterwall Tubes of the Ultra Supercritical Coal Fired Boiler
- Other Titles
- Study on the Improvement of Weld-joint Reliability in Waterwall Tubes of the Ultra Supercritical Coal Fired Boiler
- Authors
- 안종석; 이승현; 조상기; 이길재; 이창희; 문승재
- Issue Date
- Feb-2010
- Publisher
- 대한용접접합학회
- Keywords
- Low alloy-steel; Thermal power plant; Ultra-supercritical coal power boiler; Water wall tube
- Citation
- 대한용접접합학회지, v.28, no.1, pp.41 - 46
- Indexed
- KCI
- Journal Title
- 대한용접접합학회지
- Volume
- 28
- Number
- 1
- Start Page
- 41
- End Page
- 46
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/175426
- ISSN
- 2466-2232
- Abstract
- The low alloy-steel material(1.0Cr-0.5Mo, SA213T12), which has widely been used for the waterwall tube in the conventional power plant, do not have enough creep rupture strength for waterwall tubes of the Ultra-supercritical(USC) boilers. According to this reason, the high-strength low alloy-steel(2.25Cr-1.0Mo,SA213T22) has newly been adopted for the waterwall tube in the USC boilers. This paper presents failure analysis on weld-joint of the waterwall tubes in USC boilers. Visual inspections were performed to find out the characteristics of the fracture.
Additionally both microscopic characteristics and hardness test were carried out on failed tube samples.
Failures seem to happen mainly because the welding process has not been conducted strictly.(preheating,P.W.H.T and so forth). Thus, this paper has the purpose to describe the main cause of the poor welding process and to explain how to prevent similar failures in those weld-joints.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - 서울 공과대학 > 서울 기계공학부 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/175426)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.