The Paton Welding Journal, 2017, №12



2017 №12 (06)

DOI of Article 10.15407/tpwj2017.12.07

2017 №12 (08)

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The Paton Welding Journal, 2017, #12, 38-41 pages
 

Improvement of impact toughness of metal of combined welded joints of alloyed bainite steels

S.I. Moravetsky¹, A.K. Tsaryuk¹, A.V. Vavilov² and A.G. Kantor²

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazimir Malevich Str., 03150, Kiev, Ukraine. E-mail: office@paton.kiev.ua
²PJSC «Turboatom» 199 Moscow Ave., 61037, Kharkov, Ukraine. Е-mail: office@turboatom.com.ua
 
Abstract
A possible approach in the development of technology of producing combined welded joints of bainite steels was formulated as-applied to critical welded units, based on the purposeful presetting the optimum content of alloying elements and impurities in the base and filler metal within their grade composition according to the standard documents and contributing to improvement of their service characteristics. The comparison of results of experimental investigations obtained within the standard certification of welding technology, allows assuming that the implemented approach is effective. 9 Ref., 2 Tables.
Keywords: alloyed steel, rotor steel, combined welded joints, welding consumables, chemical composition, submerged arc welding, heat treatment, tempering brittleness, impact toughness
 
Received:                22.09.17
Published:               16.01.18
 
 
References

1. Subotin, V.G., Levchenko, E.V., Shvetsov, V.L. et al. (2009) Development of steam turbines of new generation of 325 MW power. Kharkiv, Folio [in Ukrainian].
2. Tsaryuk, A.K., Moravetsky, S.I., Skulsky, V.Yu. et al. (2012) Development of forge-welded combined medium-pressure rotor for 325 MW steam turbine. The Paton Welding J., 8, 36–41.
3. Goldshtejn, Ya.E. (1963) Low-alloyed steels in machine-building. Moscow-Sverdlovsk, MAShGIZ [in Russian].
4. Braun, M.P. (1965) Complexly-alloyed structural steels. Kiev, Naukova Dumka [in Russian].
5. Novikov, I.I. (1978) Theory of heat treatment of metals: Manual. Moscow, Metallurgiya [in Russian].
6. Zemzin, V.N., Shron, R.Z. (1978) Heat treatment and properties of welded joints. Leningrad, Mashinostroenie [in Russian].
7. Timofeev, M.M., Vasilchenko, G.S. (1962) Development of discs from dissimilar steels for gas turbine EGTU 1000. Problems of welding in power machine-building. In: of TsNIITMASH. Book 104. Ed. by L.M. Yarovinsky. Moscow, MAShGIZ, 100–109 [in Russian].
8. German, S.I. (1972) Electric arc welding of heat-resistant steels of pearlitic class. Moscow, Mashinostroenie [in Russian].
9. Shorshorov, M.Kh, Belov, V.V. (1972) Phase transformations and changes of properties in welding: Atlas. Moscow, Nauka [in Russian].

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