Open AccessDuplex surface modification of tool steel - deposition of a WN film and subsequent electron-beam modification
Author(s) -
Stefan Valkov,
Maria Ormanova,
N. P. Ivanov,
Д. Дечев,
R. Bezdushnyi,
Petеr Petrov
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2240/1/012043
Subject(s) - microstructure , materials science , coating , scanning electron microscope , indentation hardness , carbide , deposition (geology) , cathode ray , surface modification , energy dispersive x ray spectroscopy , phase (matter) , composite material , metallurgy , electron , chemical engineering , chemistry , paleontology , physics , organic chemistry , quantum mechanics , sediment , engineering , biology
In this study, we demonstrate a combined treatment technique of R18 high-speed tool steel comprising deposition of a WN coating followed by electron-beam surface treatment (EBT). In order to understand the influence of the deposited WN coating on the resultant structure and properties, an uncoated specimen was directly electron-beam treated under the same EBT technological conditions. The structure of the specimens was studied by X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The microhardness was also investigated. The phase composition consisted of a double phase structure of Fe and M 6 C carbides in both cases. The microstructure was significantly finer in the case of an EBT of the steel with WN coating, leading to a much higher microhardness in comparison with the case without WN.