Technology for repairing working blades of steam turbines. Part 2. Repair by the combined welding and surfacing method

Khromchenko, F. A.; Lappa, V. A.; Fedina, I. V.; Karev, A. N.; Dolzhanskii, P. R.

doi:10.1080/09507119909447429

Cited by 4 publications

(2 citation statements)

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“…The main difficulty in the technological recovery process of turbine blades of CHP is the process of forming the optimal structural-phase state of the metal, eliminating the occurrence of cold-drawn cracks and providing vibration resistance to dynamic loads [6][7][8]. At present, significant results have been achieved in studies of plasma recovery of turbine blades of CHP [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…and Spellman, D.L. [13][14][15][16] included the removal of blades from the rotor, removal of protective pads, mechanical removal of the damaged edge section, multilayer surfacing of the restored edge section, furnace heat treatment, mechanical treatment of the blade and welding-on of stellite protective plates. A significant disadvantage of this method is the lack of heat treatment after welding of the protective pads, as a result of which the blade material retains the high heterogeneity of the structural-phase composition and a high level of tensile residual stresses.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of the Turbine Blade Surface Phase Structure Recovered by Plasma Spraying

et al. 2020

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This paper presents the results of research on the construction, technological parameters and criteria that control the process of formation of optimal phase structure of austenitic- and martensitic-class material for steam turbine blades. The hypothesis that the established correlation could increase the quality of blade recovery and its resistance against dynamic and vibrational loads was proved. The efficiency of the developed implantation method for the recovery of steam turbine blades was demonstrated. The optimal technological parameters of the process of laser plasma recovery were established empirically, allowing the development of the system for the fine tuning of the phase composition of austenitic- and martensitic-class steel.

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Section: Introductionmentioning

confidence: 99%