The Paton Welding Journal, 2012, №08



2012 №08 (06)

2012 №08 (08)

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The Paton Welding Journal, 2012, #8, 36-41 pages  

DEVELOPMENT OF FORGE-WELDED COMBINED MEDIUM-PRESSURE ROTOR FOR 325 MW STEAM TURBINE

A.K. TSARYUK¹, S.I. MORAVETSKY¹, V.Yu. SKULSKY¹, N.N. GRISHIN², A.V. VAVILOV², A.G. KANTOR² and E.D. GRINCHENKO²

¹E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
²OJSC «Turboatom», Kharkov, Ukraine
 
 
Abstract
A forge-welded medium pressure rotor for 325 MW steam turbine is described, which is made from 20Kh3MVFA steel (high-temperature operation conditions) and 25Kh2NMFA steel (low-temperature conditions). Welding consumables were selected, and technology of mechanized submerged-arc welding of joints of 25Kh2NMFA + EI 415 steels was developed and certified. Physico-mechanical properties of welded joint metal in the condition after high-temperature tempering in the case of application of both local and imported welding consumables were assessed.
 
 
Keywords: submerged-arc welding, low-alloyed steel, thermal power engineering, steam turbine, rotor, combined welded joint, welding consumables, mechanical properties of joints
 
 
Received:                21.05.12
Published:               28.08.12
 
 
References
 
 
1. Shige, T., Magoshi, R., Ito, S. et al. (2001) Development of large-capacity, highly-efficient welded rotor for steam turbines. Mitsubishi Heavy Industries Techn. Rev., 38(1).
2. (2005) Proc. of PWR ASME 50348 (April 5-7, Chicago).
3. (2005) Welding filler metals: Welding guide of Boehler Thyssen Schweisstechnik Deutschland GmbH. Sept.
4. Kozlov, R.A. (1986) Welding of heat-resistant steels. Leningrad: Mashinostroenie.

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