Open AccessModification of the surface of steel 3Kh2V8F by application B-Al-coatings by methods of thermal-chemical treatment and electron-beam processing
Author(s) -
Undrakh Mishigdorzhiyn,
Nikolay Ulakhanov,
A. S. Milonov,
А. П. Семенов
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/759/1/012017
Subject(s) - materials science , tungsten , boron , diffusion , aluminium , surface modification , carbide , metallurgy , x ray photoelectron spectroscopy , boron carbide , chemical composition , cathode ray , surface layer , microstructure , indentation hardness , layer (electronics) , analytical chemistry (journal) , electron , composite material , chemical engineering , chemistry , physics , organic chemistry , quantum mechanics , chromatography , engineering , thermodynamics
The development of new protective coatings is of great fundamental and applied importance for increasing operational properties of surface layers in machine parts, increasing their durability and expanding their functionality. The study is devoted to the creation of coatings based on boron and aluminum on the surface of alloyed steel using a method, combining diffusion saturation (DS) and subsequent electron beam processing (EBP). DS was carried out in saturating pastes based on boron carbide and aluminum at temperature of 1050 °C for 2 hours. As a result of processing, a diffusion layer with thickness of up to (5.6-5.8) × 10 2 μm and complex structure with depth-heterogeneous composition was formed on the steel surface. The subsequent EBP led to a complete transformation of the primary diffusion layer and an increase in its thickness to 10 3 μm. XRD analysis showed significant differences in composition before and after EBP: after EBP tungsten borides (WB, W 2 B 9 ) and iron (Fe 2 B) were detected. In addition, it was determined that the distribution of microhardness and elemental composition (B, Al, W) over the depth of the layer after EBP have a more favorable profile without significant fluctuations compared to the sample after DS.