The Paton Welding Journal, 2009, №05



2009 №05 (01)

2009 №05 (03)

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TPWJ, 2009, #5, 8-14 pages  
TECHNOLOGICAL FEATURES OF ELECTRON BEAM WELDING OF DRILL BITS


Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                       0957-798X (print)
Issue                       № 5, 2009 (May)
Pages                      8-14
 
 
Authors
V.M. NESTERENKOV, N.E. PROTOSEJ and Yu.A. ARKHANGELSKY
E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
 
 
Abstract
The peculiarities of electron beam welding of drill bits applied in oil production industry are considered. It is shown that the best quality of weld is achieved using elliptical scanning of electron beam at ratio of axes 2:1 and maximum amplitude equal to two radii of concentration of electron beam. To improve the quality of weld in a rotary part of drill bits, it is recommended to use inserts of modifying materials in the form of foil of up to 0.2 mm thickness.
 
 
Keywords: electron beam welding, rotary drill bits, hardening steels, keyhole, through penetration, electron beam scanning, modifier
 
 
Received:                13.01.09
Published:               28.05.09
 
 
References
1. Nazarenko, O.K., Kajdalov, A.A., Kovbasenko, S.N. et al. (1987) Electron beam welding. Kiev: Naukova Dumka.
2. Nesterenkov, V.M. (2003) Special features of capillary waves in the vapour-gas channel in electron beam welding of thick metal. The Paton Welding J., 4, 7-12.
3. Landau, L.D., Lifshits, E.M. (1986) Hydrodynamics. Moscow: Nauka.

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