Advanced Search  
JWJ > Volume 28(1); 2010 > Article
Journal of KWJS 2010 February;28(1) :41-46.
Published online March 10, 2010.
Study on the Improvement of Weld-joint Reliability in Waterwall Tubes of the Ultra Supercritical Coal Fired Boiler
Jong-Seok Ahn, Seung-Hyun Lee, Sang-Kie Cho, Gil-Jae Lee, Chang-Hee Lee, Seung-Jae Moon





Correspondence:   Published online March 10, 2010
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.
Keywords: Low alloy-steel;Thermal power plant;Ultra-supercritical coal power boiler;Water wall tube
TOOLS
PDF Links  PDF Links
Full text via DOI  Full text via DOI
Download Citation  Download Citation
CrossRef TDM  CrossRef TDM
  E-Mail
Share:      
METRICS
1,272
View
0
Download
Related articles
Study on the Improvement of TIG Welding Productivity through Analysis of ArcTig Welding Properties  2021 December;39(6)
Studies on the Improvement of Butt Welding Characteristic of Polyethylene Pipes  2011 February;29(1)
A Study on the Improvement of Coating Film Characteristic in Arc Spraying by Using the Inert Gas   1987 June;5(2)
Study on the Improvement of TIG Welding Productivity through Analysis of ArcTig Welding Properties  2021 December;39(6)
Studies on the Improvement of Butt Welding Characteristic of Polyethylene Pipes  2011 February;29(1)
A Study on the Improvement of Coating Film Characteristic in Arc Spraying by Using the Inert Gas   1987 June;5(2)
e-sciencecentral
Register for e-submission
Register here to access the e-submission system of Journal of KWJS for authors and reviewers.
Manuscript Submission
To submit a manuscript, please visit the Journal of KWJS e-submission management system at https://submit.e-jwj.org, read the Instructions for Authors, and log into the Journal of KWJS e-submission system. For assistance with manuscript submission, please contact: koweld@kwjs.or.kr.
Free archive
Anyone may access any past or current articles without logging in.
Editorial Office
#304, San-Jeong Building,
23, Gukhoe-daero 66-gil, Yeongdeungpo-gu, Seoul 07237, Korea
TEL : +82-2-538-6511    FAX : +82-2-538-6510   E-mail: koweld@kwjs.or.kr
Browse Articles |  Current Issue |  For Authors and Reviewers |  About
Copyright© by The Korean Welding and Joining Society.           Developed in M2PI