Physicochemical and triboengineering properties of melted iron using a pulsed-plasma jet

Alexander D. Pogrebnjak, S. N. Bratushka, A. D. Mikhalev, Н.К. Ердыбаева, Oleg Kolisnichenko, O. P. Kul’ment’eva, Yu. N. Tyurin

2007

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DOI 10.3103/s1068366607050030

Data confidence 70 medium

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Abstract

The results are presented of studies on how plasma jets affect the physicochemical and triboengineering properties of Fe specimens melted and alloyed with a plasma jet. The microhardness of the molten specimens increased by 2.5 times compared with the original specimens and their wear during friction by cylinder-on-plane pairs turned out to be two times less than that of the original specimens. The subsurface iron is alloyed with elements that the electrode contains, such as W, Co, and Cu. In addition to α-Fe, finely dispersed Fe 6 W 6 C carbides and, possibly, W 6 Co 6 C form in the subsurface layers. After wear tests, up to ≈ 1.2 at. % were found at a depth of 15 µm beneath the friction surface of the alloyed Fe.