Abstract
The formation of electro-explosive alloying zone with the thickness up to 50 μm has been revealed. It has been shown that it has a gradient structure, characterized by the decrease of carbon and boron concentration with the increase of the distance up to the treatment surface. The subsequent electron-beam treatment of alloying zone leads to flattening of alloying surface relief and is accompanied by the formation of a multilevel structure at the depth up to 30 μm, characterized by the interchange of some layers with a different level of alloying, having structure of a submicro- and nanoscale level.
Highlights
The shortcomings of titanium alloys are their low antifriction properties
The elemental composition of a surface layer has been analyzed by the methods of X-ray spectral microanalysis
The elemental composition of a surface layer has been analyzed by the methods of X-ray spectral microanalysis [6]
Summary
The shortcomings of titanium alloys are their low antifriction properties. To increase the metal and alloy wear resistance different surface modification methods (coating formation, surface alloying and mechanical treatment, etc.) are used. Pulsed electron beams with such parameters provide remelting and high-speed crystallization of material surface layers with cooling rates up to 106 K/s and give the possibility to form nanoscale surface layers with a low roughness level and the increase of physical-mechanical properties. The aim of work is the analysis of a structural state of a surface layer of VT6 titanium alloy, formed as a result of electro-explosive alloying with boron carbide powder and the subsequent irradiation with high-intensive pulsed electron beam. Materials and research methods In the capacity of the research material the alloy based on VT6 titanium has been used
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