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2019 №08 (01) DOI of Article
2019 №08 (03)

The Paton Welding Journal 2019 #08
TPWJ, 2019, #8, 7-11 pages
Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                      0957-798X (print)
Issue                       #8, 2019 (September)
Pages                      7-11
Structure and properties of wear-resistant materials based on Co–Mo–Cr–Si–B alloying system

A.M. Kostin and V.A. Martynenko
Admiral Makarov National University of Shipbuilding 9 Heroiv Ukrainy Prosp., 54000, Mykolaiv, Ukraine. E-mail: volodymyr.martynenko@nuos.edu.ua

The aim of the work was to study the structure and properties of Co–Mo–Cr–Si–B alloying system for the case of its application as a wear-resistant material for hardening the contact surfaces of blades of ship gas turbine engines. The studies were performed with application of the methods of high-temperature differential thermal analysis, electron microscopy, X-Ray micro and X-Ray structural analyses. Hardness and microhardness of phase components were measured, adhesion activity of experimental alloys was investigated using the sessile drop method. It is shown that experimental compositions have a balanced structure based on solid solution of cobalt alloyed with molybdenum and chromium, with hardening by complex silicides, borides and carbides, have acceptable mechanical properties and melting temperature below the temperature of irreversible softening of high-temperature nickel alloys, and are characterized by high adhesive activity, which creates favourable prerequisites for their use in ship gas turbine construction. 10 Ref., 1 Table, 4 Figures.
Keywords: high-temperature nickel alloys, wear-resistant materials, structure phase composition, hardness, melting temperature, adhesive activity
Received:                04.06.19
Published:               24.09.19


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