Influence of Substrate Preheating on the Structural and Phase Composition of a Nickel-Based Cermet Coating
M. A. Gulov1, I. E. Vitoshkin1, A. A. Filippov1, A. P. Zavyalov1,2, A. G. Malikov1
1Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: laser cladding, direct laser growth, tungsten carbide, synchrotron radiation, metal ceramics
Abstract
The deposition of a nickel-based cermet coating containing 60 % tungsten carbide has been studied. The effect of substrate preheating up to 500 °С on the intensity of the in-situ synthesis of secondary ceramic particles obtained by dissolving the initial particles in a metallic matrix has been investigated. It has been shown that preheating contributes to the prevention of cracks and pores in the coating. Using synchrotron radiation, it has been found that additional heating of the sample during surfacing to a temperature of 500 °С does not cause significant changes in the phase composition of the resulting composite.
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