The Paton Welding Journal, 2013, №06



2013 №06 (06)

2013 №06 (08)

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The Paton Welding Journal, 2013, #6, 38-42 pages  

WELDS FORMATION IN EBW OF HEAT-RESISTANT STEELS OF THE GRADES 10Kh9MFBA AND 10Kh12M

V.M. NESTERENKOV, L.A. KRAVCHUK, Yu.A. ARKHANGELSKY and A.A. BONDAREV

E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine. E-mail: office@paton.kiev.ua
 
 
Abstract
The influence of both the conditions of electron beam welding of heat-resistant steels 10Kh12M and 10Kh9MFBA 30 mm thick without preheating and also the spatial arrangement of electron beam relatively to the part being welded on weld formation and tendency to crack formation was investigated. It was established that in EBW of the mentioned heat-resistant steels without preheating the elimination of cracks and elongated cavities is achieved at the speed of welding of not more than 3 mm/s. The reproducibility of quality welds and formation of narrow and deep welds with parallel walls of cast zone is possible by application of technological scanning of electron beam around the circle and elliptic trajectory, and also arrangement of electron beam focus at the level of 2/3 of the specimen thickness. In the development of EBW technology of heat-resistant steels the non-destructive method of ultrasonic testing can be recommended for application. 6 Ref., 1 Table, 6 Figures.
 
 
Keywords: electron beam welding, heat-resistant steels, electron beam, welding scheme, energy input, welding speed, focusing, defects, middle cracks, face and reverse weld beads
 
 
Received:                25.03.13
Published:               28.06.13
 
 
References
1. Nazarenko, O.K., Shapoval, V.I., Loskutov, G.A. et al. (1993) Observation of electron beam welding process and automatic seam tracking. Avtomatich. Svarka, 5, 35-38.
2. Sayegh, G. (1986) State of the art of high energy density beam welding: Houdremont Lecture. Tokyo: IIW.
3. Fritz, D. (1988) Electron beam welding of today. In: Proc. of 2nd Int. Conf. on Electron Beam Technologies (Varna, 31 May-4 June 1988), 1048-1063.
4. Morochko, V.P., Sorokin, L.I., Zorin, N.Ya. (1975) Influence of electron beam welding mode on weld shape and properties of heat-resistant alloy welded joints 10-15 mm thick. Svarochn. Proizvodstvo, 6, 32-36.
5. Shida, T., Kita, H., Okamura, H. et al. (1978) Effects of welding parameters and prevention of defects in deep penetration EBW of heavy section steel. IIW Doc. IV-239-78.
6. Petrenko, V.R., Olshansky, N.A., Lopatko, A.P. et al. (1985) Study of influence of beam focus deepening in titanium specimens on weld formation stability in EBW. In: Proc. of 2nd All-Union Conf. on Current Problems of Welding of Non-Ferrous Metals. Kiev: Naukova Dumka, 223-226.

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