Structure and tribological properties of steel after non-vacuum electron beam cladding of Ti, Mo and graphite powders

Journal Article · Mon Feb 15 00:00:00 EST 2016 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2015.11.028· OSTI ID:22587093

Bataev, I. A.; Mul, D. O.; Bataev, A. A. ^[1]; Golkovski, M. G. ^[2]; Lizunkova, Ya. S. ^[3]; Dostovalov, R. A. ^[1]

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1. Novosibirsk State Technical University, K. Marks 20, 630073 Novosibirsk (Russian Federation)
2. Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, Lavrentyev pr., 11, 630090 Novosibirsk (Russian Federation)
3. Leibniz Universität Hannover, An der Universität, 2, 30823 Garbsen (Germany)

The non-vacuum electron beam cladding technique was used to fabricate layers alloyed with Ti, Mo and C on the surface of low-alloyed steel. Two types of experiments were carried out. In the first experiment, a mixture of Ti and graphite powders was used for cladding; in the second, a mixture of Ti, Mo and graphite powders was used for cladding. CaF{sub 2} powder or a mixture of CaF{sub 2} and LiF powders was used as flux. The thickness of the cladded layers was in the range of 2–2.2 mm. The structure of the layers was studied using optical microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). The microhardness after cladding of the layers fabricated by cladding of Ti and graphite powders was 8–9 GPa, while the microhardness of layers with Mo additions reached 11–12 GPa. The highest wear resistance at sliding friction and friction in abrasive environment was reached in the samples fabricated using Ti, Mo and graphite mixture due to the higher hardness and the martensite–austenite structure of the matrix. The wear resistance against fixed abrasive particles was 2.4 times higher compared to that of carburized and quenched steel. - Highlights: • Ti, C and Mo mixture of powders was cladded using non-vacuum electron beam treatment. • The depth of the cladded layers was 2.0 … 2.2 mm. • The microhardness of layer with Mo, Ti and C additions reached ~ 11 … 12 GPa. • The hardening of the layers caused by the formation of TiC particles and martensitic matrix • Wear resistance of cladded coatings was 2.4 higher than carburized steel.

• OSTI ID: 22587093
• Journal Information: Materials Characterization, Vol. 112; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
AUSTENITE
COATINGS
ELECTRON BEAMS
GRAPHITE
HARDENING
LAYERS
LITHIUM FLUORIDES
LOW ALLOY STEELS
MARTENSITE
MARTENSITIC STEELS
MICROHARDNESS
MICROSTRUCTURE
POWDERS
SCANNING ELECTRON MICROSCOPY
TITANIUM CARBIDES
TRANSMISSION ELECTRON MICROSCOPY
WEAR RESISTANCE
X-RAY DIFFRACTION