The Paton Welding Journal, 2001, №07

2001 №07 (09)

2001 №07 (11)

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The Paton Welding Journal, 2001, #7, 44-47 pages

Autovacuum brazing of steel impellers of centrifugal compressors

V.N. Radziyevsky, G.G. Tkachenko, Yu.F. Gartsunov

VNIIkompressormash, Sumy, Ukraine.

Abstract
It is shown that argon-arc welding combined with brazing to form a large fillet of a metal powder can provide a reliable T-joint in hard-of-access channels in the centrifugal compressor impellers. Simple-to-perform autovacuum heating applied for brazing allows cleaning of surfaces prior to melting of a brazing filler alloy, promotes formation of the frame of a powder in a large fillet and creates conditions for formation of a composite metal structure with required mechanical properties.
Keywords: argon-arc welding, brazing, autovacuum heating, surface cleaning, structurization, formation of a fillet, formation of a frame, impeller, T-joint, metal powder, brazing filler alloy

References

1. Myers, L.W., LaFlamme, G. (1998) Electron beam braze welding of compressor impellers. IIW Doc. IV-732-98.
2. Radziyevsky, V.N., Bondarev, A.A., Rymar, V.I. (1971) Brazing of centrifugal machine impellers. Svarochnoye Proizvodstvo, 3, 40-41.
3. Radziyevsky, V.N., Lotsmanov, S.N., Rymar, V.I. (1974) Brazed centrifugal compressor impellers of low-alloyed steels. Khim. i Neft. Mashinostroyeniye, 8, 3 - 8.
4. Radziyevsky, V.N., Rymar, V.I., Chernov, V.Yu. (1976) Technology for fabrication of all-brazed centrifugal compressor impellers. Ibid., 12, 10-12.
5. Radziyevsky, V.N., Rymar, V.I. (1978) Vacuum brazing of centrifugal compressor impellers of steel 07K1116N6. Ibid., 5,9- 11.
6. Radziyevsky, V.N., Rymar, V.I., Bespalov, V.K. (1991) Vacuum brazing of T-joints with a large fillet of a powder. Svarochnoye Proizvodstvo, 8, 5 - 6.
7. Rymar, V.I., Lotsmanov, S.N., Radziyevsky, V.N. et al. (1973) Interaction of manganese, chromium and titanium with air under conditions of auto vacuum heating during brazing. Ibid., 11, 6-8.
8. Kuchuk-Yatsenko, S.I., Kharchenko, G.K., Falchenko Yu.V. et al. (1998) Self-cleaning of the mating surfaces from oxides in solid-state welding using heating. Avtomaticheskaya Svarka, 2, 16 - 23.
9. Radziyevsky, V.N., Gartsunov, Yu.F. (1990) Cleaning of surface of carbon steel from an oxide film in autovacuum heating. Svarochnoye Proizvodstvo, 5, 31 - 33.
10. Rymar, V.I., Radziyevsky, V.N. Sorbent for autovacuum brazing of hard-to-braze materials. USSR author’s certificate 803962, Int. Cl. В 01 J 1 22, В 23 К 35 22. Publ. 15.02.81.
11. Radziyevsky, V.N., Gartsunov, Yu.F., Tkachenko, G.G. (1997) Brazing of steel using copper-manganese cored filler alloy in a wide gap. Avtomaticheskaya Svarka, 11, 18-21.
12. Radziyevsky, V.N., Gartsunov, Yu.F., Tkachenko, G.G. (1997) Effect of dispersion of the iron powder core by a copper filler allov on properties of the brazed joint. Ibid., 8, 18-22.

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Suggested Citation

V.N. Radziyevsky, G.G. Tkachenko, Yu.F. Gartsunov (2001) Autovacuum brazing of steel impellers of centrifugal compressors. The Paton Welding J., 07, 44-47.

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