The Paton Welding Journal, 2002, №02

2002 №02 (13)

2002 №02 (02)

---

The Paton Welding Journal, 2002, #2, 2-5 pages

Heterogeneity of pipe steel joints made by flash butt welding

S.I. Kuchuk-Yatsenko, G.K. Kharchenko, G.M. Grigorenko, Yu.V. Falchenko, T.G. Taranova, Ya.P. Gritskiv, V.F. Zagadarchuk, S.G. Grigorenko

E.O. Paton Electric Welding Institute of the NASU 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.

Abstract
Results of examination of physical, chemical and structural inhomogeneity of joints from low-alloyed low-carbon pipe steels made by the flash butt welding are presented. It is shown that changes in chemical composition and metal structure and also the decrease in its density is occurred in the butt at the area corresponding to the location of a light band. Ferritic band and joint line are revealed inside the dark band after appropriate heat treatment and etching.
Keywords: flash butt welding, pipe steel, metal density, decarburized zone, butt, light band, ferritic band, joint line

References

1. Kuchuk-Yatsenko, S.I. (1992) Flash-butt resistance welding. Kyiv: Naukova Dumka.
2. Slavinsky, M.P. (1952) Physico-chemical properties of ele¬ments. Moscow: Metallurgizdat.
3. Livshits, V.T. (1959) Physical properties of metals and alloys. Moscow: Mashgiz.
4. Novikov, I.V., Goncharov, V.G., Obydalo, K.I. et al. (1978) Density and linear expansion factor of higher heat resistance tool steels. Metally, 5, 73-75.
5. Kupriyanov, A.A., Filipov, S.I. (1968) Density and structural changes in iron and iron alloys with carbon. Izv. Vuzov, Chem. Metailurgia, 1, 10-15.
6. Smirnova, E.K. (1979) Electron microscope examination of defects formed in joints in pressure welding of steels and alloys. Synopsis of Thesis for Cand. Sci. Degree. Moscow.
7. Cheremskoj, P.T., Slezov, V.V., Betekhtin, V.I. (1990) Pores in solids. Moscow: Energoatomizdat.
8. Geguzin, Ya.E. (1962) Macroscopic defects in metals. Moscow: Metallurgizdat.
9. Lebedev, V.K., Tabelev, V.D., Pismenny, A.S. (1983) Butt brazing of steel pipelines under pressure. Avtomatich. Svarka, 9, 25-27.
10. Forostavets, B.A., Kirdo, I.V. (1970) Influence of high temperature strain of steel at presence of liquid phase on structure and properties of welded joints. Ibid., 6, 14-17.
11. Zak, J., Rys, P. (1972) The origin of «Light area» in upset weld of rolled carbon steel. Welding J., 5, 272-279.
12. Takamura, T., Shimomura, T. Suzuki, S. (1984) Formation mechanism of white line in butt welded joints by resistance heating. J. Iron and Steel Inst, of Jap., 10, 153-159.
13. Forostovets, B.A. (1968) Conditions of formation of light band in continuous flash-butt welding. Avtomatich. Svarka, 9, 18-22.
14. Pujko, V.A., Zubareva, V.A., Blinkova, I.P. et al. (1983) Study of heterogeneity of flash-butt welded joints. In: Voprosy Svarochn. Proizvodstva. Chelyabinsk: ChPI.
15. Polosukhin, N.A. (1952) Structure and strength of pressure-gas welded joints. Moscow: Mashgiz.
16. Gelman, A.S. (1970) Fundamentals of pressure welding. Moscow: Mashinostroyeniye.
17. Bochvar, A.A. (1940) Principles of heat treatment of alloys. Moscow: Metallurgizdat.
18. Falkevich, A.S. ( 1952) Conditions of formation and properties of ferritic band in pressure methods of welding. Avtogen. Delo, 8, 8-12.
19. Kuchuk-Yatsenko, S.I., Kharchenko, G.K., Falchenko, Yu.V. et al. (2000) Features of ferrite band formation in vacuum pressure welding of steel. The Paton Welding J., 6, 10-15.
20. Kofstad, P. (1969) High-temperature oxidation of metals. Moscow: Mir.
21. Malinochka, Ya.N., Shmelev, Yu.S., Olikhova, M.A. et al. (1981) Formation of oxides in hard steel in diffusion of oxygen in it. Izv. AN SSSR, Metally, 5, 110-119.

---

Suggested Citation

S.I. Kuchuk-Yatsenko, G.K. Kharchenko, G.M. Grigorenko, Yu.V. Falchenko, T.G. Taranova, Ya.P. Gritskiv, V.F. Zagadarchuk, S.G. Grigorenko (2002) Heterogeneity of pipe steel joints made by flash butt welding. The Paton Welding J., 02, 2-5 .

---