| 2009 №06 (05) | 2009 №06 (07) |
The Paton Welding Journal, 2009, #6, 31-35 pages
Peculiarities of low-amperage argon-arc and microplasma powder cladding on narrow substrate
A.V. Yarovitsyn1, K.A. Yushchenko1, A.A. Nakonechny1, L.A. Petrik2
1E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.2Open Joint Stock Company «Motor-Sich», Zaporozhie, Ukraine
Abstract
Comparative analysis of technological characteristics of low-amperage argon-arc and microplasma powder cladding processes is conducted for a case of multilayer cladding on a narrow substrate 3.5 mm wide. Increase in viscosity of the weld pool metal provided by a dispersed additive in multilayer microplasma powder cladding allows increasing the effective heat input and thickness of the deposited layer, as well as reducing the risk of cracking of heat-resistant nickel alloys, which may be caused by re-heating in multilayer cladding.
Keywords: low-amperage argon-arc cladding, microplasma powder cladding, multilayer cladding on narrow substrate, technological characteristics of arc, energy and thermal characteristics, hydrodynamic model of weld pool
References
1. Peremilovsky, I.A., Gejchenko, V.S., Frumin, I.I. (1976) Cladding repair of turbine blades of aircraft engines. Avtomatich. Svarka, 5, 54-56.2. Arzhakin, A.N., Stolyarov, 1.1., Turov, A.V. (2003) Development of technology for repair of 8th stage blades of higli-pressure turbine of aircraft engine by automatic cladding method. Svarshchik, 4, 8-9.
3. Martyshin, G.V., Trunova, V.B. (1993) Argon-arc cladding with pulse feed of filler wire in repair of parts. Svarochn. Proizvodstvo, 10, 16-17.
4. Krause, C. (2003) Improved technology of repair: laser powder cladding. Gazoturb. Tekhnologii, 5, 24-26.
5. Savchenko, V.S., Yushchenko, K.A., Savolej, N.I. et al. (1993) Specifics of welding of high-nickel dispersion-hardened heat-resistant alloys and repair of parts made from them. Avtomatich. Svarka, 10, 31-33.
6. Yushchenko, K.A., Savchenko, V.S., Chervyakova, L.V. et al. (2005) Investigation of weldability of nickel superalloys and development of repair technology for gas turbine blades. The Paton Welding J., 6, 2-5.
7. Yushchenko, K.A., Yarovitsyn, A.V. (2007) Experience of application of microplasma powder cladding. In: Proc. of 4th All-Ukr. Sci.-Techn. Conf. of Junior Scientists and Specialists on Welding and Related Technologies (23-25 May, 2007. Kiev). Kiev: PW1.
8. Gladky, P.V., Pereplyotchikov, E.F., Ryabtsev, I.A. (2007) Plasma claddinq. Kiev: Ekotekhnologiya.
9. Frolov, V.V., Vinokurov, V.A., Volchenko, V.N. et al. (1970) Theoretical principles of welding. Ed. by V.V. Frolov. Moscow: Vysshaya Shkola.
10. Rykalin, N.N. (1950 Calculations of thermal processes in welding. Moscow: Mashgiz.
11. Shneerson, V.Ya. (1979) Formation of welds of flanged joints. Avtomatich. Svarka, 2, 5, 6, 9.
12. Kapitsa, P.L. (1948) Wave flow of thin layers of viscous fluid. Zhurnal Elektrotekhn. Fiziki, 18, Issue 1, 3-28.
13. Frenkel, Ya.I. (1975) Kinetic theory of fluids. Leningrad: Nauka.
14. Ivochkin, I.I. (1965) Suppression of columnar grain growth by method of welding pool «freezing». Svarochn. Proizvodstvo, 12, 1-3.