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Interlayer Dilution Zone Elemental Profiling and Microhardness Measurements for Individual Laser Clads

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Abstract

A detailed study of microstructure and microhardness distribution at clad-to-substrate interlayer dilution zone as well as elemental profiling were carried out for individual laser clads. Tungsten carbide (44 712-10) and nickel alloy (1560) powders were used for individual clad synthesis at the surface of low alloy steel by coaxial laser cladding technique. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) revealed partial tungsten carbide (WC) melting and secondary chromium carbides formation near WC grains. Iron and nickel elemental profiles were quantified by EDX technique to estimate interlayer dilution zone dimensions. Interlayer zone depth in the clad center increased from 15 to 80 µm when laser power was changed from 0.8 to 1.5 kW while at the outer clad regions it varied in 3–20 µm range. Interlayer clad-to-substrate zone microhardness study revealed a non-uniform dependence of hardness distribution for single clads synthesized with varying laser power.

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Funding

The authors gratefully acknowledge the financial support of the Russian Science Foundation (agreement no. 16-19-10656) for cladding experiments and sample cross-section preparation. M.N. Filippov thanks funding of the Russian Foundation for Basic Research (project 19-03-00271) for SEM and EDX measurements.

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Authors and Affiliations

  1. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow, Russia

    V. N. Lednev, P. A. Sdvizhenskii, M. Ya. Grishin & S. M. Pershin

  2. National University of Science and Technology MISiS, Moscow, Russia

    V. N. Lednev, P. A. Sdvizhenskii & M. N. Filippov

  3. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russia

    M. N. Filippov

  4. Moscow Institute of Physics and Technology (State University), Dolgoprudny, Moscow oblast, Russia

    M. Ya. Grishin

  5. Bauman Moscow State Technical University, Moscow, Russia

    A. Ya. Stavertiy, R. S. Tretyakov & R. D. Asyutin

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  1. V. N. Lednev
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  2. P. A. Sdvizhenskii
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  3. M. N. Filippov
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  4. M. Ya. Grishin
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  8. S. M. Pershin
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Correspondence to V. N. Lednev.

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Lednev, V.N., Sdvizhenskii, P.A., Filippov, M.N. et al. Interlayer Dilution Zone Elemental Profiling and Microhardness Measurements for Individual Laser Clads. Phys. Metals Metallogr. 121, 1473–1477 (2020). https://doi.org/10.1134/S0031918X20130098

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  • DOI: https://doi.org/10.1134/S0031918X20130098

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