| 2000 №04 (09) | 2000 №04 (11) |
The Paton Welding Journal, 2000, #4, 41-44 pages
Structure of martensitic-ferritic steels after surface plasma hardening
A.V. Tugolukov1, O.N. Klyuchnik1, E.D. Budyuk2
1Concern Stirol, Artemivsk, Ukraine2Ukrainian State Chemical-Technological University, Dnipropetrovsk, Ukraine
Abstract
Surface plasma treatment provides a fundamental increase in hardness of steel 20Kh17N2. This is achieved by varying power of the plasma jet and increasing its concentration. Metallography revealed three characteristic regions formed as a result of the plasma jet effect. An increase in the concentration of the heat flow affecting the sample surface causes a decrease in the hardened and transition zones, decrease in the amount of carbides in the bulk of the main phases and reduction in grain size.
Keywords: surface plasma hardening, plasma jet, hardness, martensitic and ferritic phases, carbides, hardened and transition zones
References
1. Leshchinsky, L.K., Camotugin, S.S., Pirch, I.I. et al. (1990) Surface plasma hardening. Kyiv: Tekhnika.2. Karpov, L.P. (1993) Effect of quenching conditions on carbide network in steel 07Kh16N6. Metallovedeniye i Term. Obrabotka Metallov. 1, 13 - 15.
3. Blanter, M.E. (1962) Phase transformations in heat treatment of steel. Moscow: Goschertsvetmet