The Paton Welding Journal, 2009, №12



2009 №12 (05)

2009 №12 (07)

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TPWJ, 2009, #12, 32-36 pages  
REPAIR WELDING OF TURBINE CASE PARTS FROM HEAT-RESISTANT STEELS WITHOUT SUBSEQUENT HEAT TREATMENT


Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                       0957-798X (print)
Issue                       № 12, 2009 (December)
Pages                      32-36
 
 
Authors
A.K. TSARYUK¹, V.D. IVANENKO¹, V.V. VOLKOV¹, S.I. MAZUR², A.A. TROJNYAK², A.V. VAVILOV³, A.G. KANTOR³ and N.P. VOLICHENKO^3
1E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
²Tripolskaya TPP, Ukrainka, Ukraine
³OJSC «Turboatom», Kharkov, Ukraine
 
 
Abstract
The paper deals with the issues of repair welding of damaged case parts of turbines after long-term operation at steam working parameters. A technology of welding with pearlitic electrodes without subsequent heat treatment (high tempering) is proposed. For repair of damaged components of case equipment of turbo units from cast heat-resistant steels a technology of manual arc welding with pearlitic electrodes of E-09Kh1M type is recommended. This technology involves application of preheating and concurrent heating with subsequent thermal recovery. Welded joints made by the developed technology have high crack resistance and required mechanical properties. The proposed technology has been successfully tested in repair welding of HPC of K-300-240 turbine.
 
 
Keywords: repair welding, damage, heat-resistant cast steels, turbine case parts, electrodes, preheating, thermal recovery, residual life
 
 
Received:                05.06.09
Published:               28.12.09
 
 
References
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