Avtomaticheskaya Svarka (Automatic Welding), #12, 2019, pp.61-64
Experience of repair of equipment parts of TPS power unit
A.V. Gruzevich1, D.L. Nikiforov2
Trypillya TPS, 08720, Ukrajinka. E-mail: email@example.com
PSJC «Tsentrenergo», 120/4 Kozatska Str., 03022, Kyiv, Ukraine.
Technology of welding and recovery of performance of the shaft of regulator of limiting number of revolutions in overspeed governor of turbo feed pump in No.1 power unit of Trypillya TPS is presented. Operating conditions of overspeed governor regulator shaft and causes for its damage have been analyzed. Parameters of the mode of welding and heat treatment of the regulator shaft from steel 40Kh were optimized. Microstructure and mechanical properties of witness-samples were studied, and optimum technological conditions of producing a sound repair welded joint were determined. Obtained results were confirmed by successful operation of the turboset for 2743 h. 7 Ref., 3 Tabl., 5 Fig.
Keywords: reconditioning repair of power equipment, TIG welding, welded joints, heat treatment, microstructure, mechanical properties
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