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2019 №12 (06) DOI of Article
10.15407/tpwj2019.12.07
2019 №12 (01)

The Paton Welding Journal 2019 #12
TPWJ, 2019, #12, 56-60 pages
 
Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                      0957-798X (print)
Issue                       #12, 2019 (December)
Pages                      56-60
 
Experience of repair of parts of TPS power unit equipment

A.V. Gruzevich1 and D.L. Nikiforov2
1Trypillya TPS 08720, Ukrajinka, Ukraine. E-mail: gruzevich@bigmir.net
2PSJC «Tsentrenergo» 120/4 Kozatska Str., 03022, Kyiv, Ukraine. E-mail: d.i.nikiforov.jsc.ce@gmail.com

Technology of welding and recovery of performance of the shaft of regulator of limiting number of revolutions in automatic safety device of turbo feed pump in No.1 power unit of Trypillya TPS is presented. Operating conditions of automatic safety device of 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 Tables, 5 Figures.
Keywords: reconditioning repair of power equipment, TIG welding, welded joints, heat treatment, microstructure, mechanical properties
 
 
Received:                09.10.19
Published:               30.01.19
 
 

References

1. Kosyak, Yu.F. (1982) Steam turbine K-300-240 KhTGZ. Moscow, Energoizdat [in Russian].
2. Filippov, A.A., Pachurin, G.V., Kuzmin, N.A. (2014) Stability of austenite at different temperatures and mechanical properties of hot-rolled steel 40Kh. Int. J. of Applied and Fundamental Research, 10, 27–32.
3. Pchelintsev, V.O., Govorun, T.P., Rab, V.M., Berladir, Kh.V. (2012) Thermocyclic treatment of 40Kh steel shaft of centrifugal pump of NKV type. Visnyk Sum. Derzh. Un-tu. Seriya Tekhnichni Nauky, 4, 123–132 [in Ukrainian].
4. Vasin, P.A., Vinokurov,V.A. (2013) Deposition of protective and hardening coatings on 40Kh steel by electric-spark alloying. In: Proc. of XIX Int. Sci.-Pract. Conf. on Modern Engineering and Technologies. Tomsk, 26–27.
5. (1988) RD 108.021.112.88: Repair of defects in cast housing parts of steam turbines and fittings using welding-up method without heat treatment. St.-Petersburg, NPO CKTI [in Russian].
6. (1990) RD 34.17.205–90: Instruction on welding of connecting branches to collectors from 12Kh1MF steel by austenitic electrodes without heat treatment. Moscow, VTI [in Russian].
7. Kasatkin, S.B., Musiyachenko, V.F., Smiyan, O.D. (1974) Effect of preheating on hydrogen distribution in welded joint of high-strength steel. Avtomatich. Svarka, 5, 72–73 [in Russian].