MICRODIFFRACTION PHASE COMPOSITION ANALYSIS OF LAYER DEPOSITED ON HARDOX 450 STEEL BY WIRE
https://doi.org/10.17073/1997-308X-2017-3-75-82
Abstract
The paper describes single and crosswise (double) surfacing of Hardox 450 steel using the C–Mn–Si–Cr–Nb–W flux-cored wire, and the analysis of the microhardness, phase composition, and defective substructure of built-up layers. The microhardness profile is obtained at a distance from the surface. It is shown that a high-strength surface layer with a microhardness of 10,2 GPa is formed as a result of surfacing. Material microhardness decreases to 6 GPa at a greater distance from the surface of the built-up layer. An increase in the number of built-up layers up to 2 causes thickening of the hardened layer. The paper shows that the microhardness value of this layer does not depend on the number of built-up layers of the weld flux-cored wire. The paper describes the study of the phase composition and defective substructure of a built-up layer by transmission electronic diffraction microscopy methods. It is shown that the thickness of the hardened layer varies from 6,0–6,5 to 7,5 mm for single and double surfacing. It was found that the increase in the built-up layer microhardness was attributable to the formation of a multiphase submicro- and nanosized structure with hardening preconditioned by the hardening effect and the presence of submicron-sized niobium carbide inclusions, the morphology of which essentially depended on the place of formation in the steel structure. It was found that the contact area between the surfacing and the base metal was similar to the structure of the original steel, but hardening of the transition layer occurred due to the presence of carbide phase particles formed by elements of the flux-cored wire.
About the Authors
S. V. Konovalov
Samara National Research University;
Siberian State Industrial University (SibSIU)
Russian Federation
Russian Federation
Dr. Sci. (Tech.), Associate professor, Head of the Department of metals technology and aviation materials, 443086, Samara, Moskovskoye Shosse, 34;
Chief researcher, Scientific Department, 654007, Novokuznetsk, Kirova str., 42
V. E. Kormyshev
SibSIU
Russian Federation
Engineer of the Physics Department
Russian Federation
Engineer of the Physics Department
V. E. Gromov
SibSIU
Russian Federation
Dr. Sci. (Phys. Math.), Prof., Head of the Physics Department
Russian Federation
Dr. Sci. (Phys. Math.), Prof., Head of the Physics Department
Yu. F. Ivanov
Institute of High Current Electronics Siberian Branch Russian Academy of Sciences (IHCE SB RAS);
National Research Tomsk State University (NR TSU)
Russian Federation
Russian Federation
Dr. Sci. (Phys. Math.), Prof., Leading researcher, Laboratory of plasma emission electronics, 634021, Tomsk, Akademicheskii av., 2/3;
Leading researcher, Laboratory of low-temperature plasma, 634050, Tomsk, Lenina av., 36
E. V. Kapralov
SibSIU
Russian Federation
Cand. Sci. (Tech.), Engineer, Physics Department
Russian Federation
Cand. Sci. (Tech.), Engineer, Physics Department
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Review
For citations:
Konovalov S.V., Kormyshev V.E., Gromov V.E., Ivanov Yu.F., Kapralov E.V. MICRODIFFRACTION PHASE COMPOSITION ANALYSIS OF LAYER DEPOSITED ON HARDOX 450 STEEL BY WIRE. Powder Metallurgy аnd Functional Coatings (Izvestiya Vuzov. Poroshkovaya Metallurgiya i Funktsional'nye Pokrytiya). 2017;(3):75-82. (In Russ.) https://doi.org/10.17073/1997-308X-2017-3-75-82
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