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<p>In this study, NiCr-based coatings deposited on H13 tool steel using the Gas Tungsten Arc Welding (GTAW) process were investigated. The coatings were applied in two stages: initially, a buffer weld layer was deposited using a Ni-based alloy, followed by the deposition of a second coating layer composed of a Cr-based filler material. Microstructural analysis performed through optical microscopy revealed a fine dendritic microstructure, attributed to the high solidification rate. The mechanical properties of the deposits were evaluated using Vickers microhardness testing under various loads (HV0.5, HV1, and HV5). To assess tribological performance, pin-on-disk wear tests were conducted. The results demonstrated that the addition of a Ni-based buffer layer to the Cr-based coatings enhances the tribological properties, as evidenced by lower coefficients of friction (COF) and reduced wear rates.</p> Graphical abstract <p></p>

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Tribological and mechanical performance of NiCr coatings deposited on H13 tool steel by GTAW process

  • 期刊论文

  • 发表日期：

    2026年2月5日

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  • Jorge Eduardo Hernandez-Flores,
  • Bryan Ramiro Rodriguez-Vargas,
  • Argelia Fabiola Miranda-Perez,
  • Josué Gómez-Casas,
  • Juan Carlos Ortiz-Cuellar

摘要

In this study, NiCr-based coatings deposited on H13 tool steel using the Gas Tungsten Arc Welding (GTAW) process were investigated. The coatings were applied in two stages: initially, a buffer weld layer was deposited using a Ni-based alloy, followed by the deposition of a second coating layer composed of a Cr-based filler material. Microstructural analysis performed through optical microscopy revealed a fine dendritic microstructure, attributed to the high solidification rate. The mechanical properties of the deposits were evaluated using Vickers microhardness testing under various loads (HV0.5, HV1, and HV5). To assess tribological performance, pin-on-disk wear tests were conducted. The results demonstrated that the addition of a Ni-based buffer layer to the Cr-based coatings enhances the tribological properties, as evidenced by lower coefficients of friction (COF) and reduced wear rates.

Graphical abstract