DETERMINATION OF MICROHARDNESS MULTILAYER METAL MATERIAL OBTAINED BY ELECTROSLAG REMELTING
https://doi.org/10.17073/0368-0797-2015-4-284-286
Abstract
The multilayer preform production is possible with the use of
electroslag technology that is highly variable and allows to varify the
infl uence ways to the structure of the resulting casting. According to
the proposed technology the forming of layers with new composition
was made by supply of carbonaceous material with specifi c weight into the liquid-metal bath at specifi ed intervals. In order to determine the changes caused by the introduction of additives, a series of mechanical tests were conducted, in particular – the defi nition of microhardness of the resulting material. Metallographic studies of microhardness with yield results that are not possible in macroscopic mechanical tests. For example, it can be used to identify the pattern of change of hardness values in a multi-metal composition. Analysis of the data allows to conclude: microhardness of the material, with a lot of additives is higher than with a smaller mass-carburizers additives; on transverse specimens – microhardness is higher than longitudinal; samples were subjected to a deeper degree of deformation and heat treatment and annealing conditions for annealing hardening + microhardness results show values almost two times higher. Also worth mentioning - profound
degree of deformation leads to a smearing of the material layers
in the structure, and defi nes the maximum degree of deformation of the material in which the multilayer structure is preserved.
About the Authors
I. V. Chumanov
South Ural State University (Zlatoust branch) 16, Turgeneva str., Zlatoust, Chelyabinsk region, 456200, Russia
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor, Head of the Chair “General Metallurgy”
M. A. Matveeva
South Ural State University (Zlatoust branch) 16, Turgeneva str., Zlatoust, Chelyabinsk region, 456200, Russia
Russian Federation
Postgraduate of the Chair “General Metallurgy”
Russian Federation
Postgraduate of the Chair “General Metallurgy”
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Review
For citations:
Chumanov I.V., Matveeva M.A. DETERMINATION OF MICROHARDNESS MULTILAYER METAL MATERIAL OBTAINED BY ELECTROSLAG REMELTING. Izvestiya. Ferrous Metallurgy. 2015;58(4):284-286. (In Russ.) https://doi.org/10.17073/0368-0797-2015-4-284-286
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