| 2000 №06 (07) | 2000 №06 (09) |
The Paton Welding Journal, 2000, #6, 34-37 pages
New method for the manufacture of thermochemical cathodes for plasmatrons
V.V. Arsenyuk
E.O. Paton Electric Welding Institute of the NASU 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.Abstract
Results of investigations on vacuum percussion welding of zirconium and hafnium to copper for the manufacture of thermochemical cathodes for plasmatrons are given. Thechnological parameters of welding and forming of parts are determined. The technology and equipment developed for the manufacture of four types of the thermochemical cathodes are described. The new method for the manufacture of the thermochemical cathodes allows substantial saving of scarce metals, improvement in reliability and extension of service life of plasma installations.
Keywords: percussion welding, thermochemical cathodes, technology, plasmatron, erosion tests
References
1. O’Brien, R.L., Wickham, P.J., Keam, W.R. (1964) Advances in plasma arc cutting. Welding J., 12, 114 - 116.2. Matsuda, F., Ushio, M. (1990) Comparative study of air-plasma cathode durability new cathode materials for air. Plasma Cutting, 3, 132 - 136.
3. Lakomsky, V.I. (1997) Oxide cathodes of the electric arc. Zaporozhie: Integral.
4. Ignatenko, A.I., Kharchenko, G.K. Method for pressure welding. USSR authors’ certificate 404588, Int. Cl. В 23 К 19/00. Publ. 22.10.73.
5. Ignatenko, A.I., Kharchenko, G.K., Gurienko, V.P. et al. (1989) Vacuum percussion welding of dissimilar metals. In: News letter, 7. Series of welding equipment. Kyiv: PWI.
6. Arsenyuk, V.V., Danilchenko, B.V., Ignatenko, A.I. et al. (1995) Vacuum percussion welding of zirconium and hafnium to copper to manufacture electrodes for plasmatrons. In: Proc, of «Welding-95» Russian Sci.-Techn. Conf, on Modern Problems in Welding Science and Technology. Perm.