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<p>A novel surface treatment was developed to enhance the tribological properties of AISI H13 tool steel. The process combines in-situ urea-assisted nitriding during electrical discharge machining with subsequent TiAlN PVD coating. Pin-on-disk tests demonstrate a fivefold increase in the sliding wear resistance compared to untreated steel. This improvement is attributed to the formation of a unique multi-layered structure containing iron and titanium nitrides (Fe<sub>11</sub>N, TiN), offering improved load-bearing capacity and high surface hardness (fivefold increase compared to control sample). The presence of TiO<sub>2</sub> phase formed during PVD coating contributes to the reduction in the friction coefficient. This innovative approach offers a promising advancement for extending the service life of AISI H13 components operating under sliding wear and frictional losses.</p>

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Enhanced wear resistance and frictional behavior of AISI H13 tool steel through in-situ urea-assisted EDM nitriding and TiAlN PVD coating

  • 期刊论文

  • 发表日期：

    2025年5月14日

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  • Sinval Pedroso da Silva,
  • Alexandre Mendes Abrão,
  • Ernane Rodrigues da Silva,
  • Marcelo Araújo Câmara

摘要

A novel surface treatment was developed to enhance the tribological properties of AISI H13 tool steel. The process combines in-situ urea-assisted nitriding during electrical discharge machining with subsequent TiAlN PVD coating. Pin-on-disk tests demonstrate a fivefold increase in the sliding wear resistance compared to untreated steel. This improvement is attributed to the formation of a unique multi-layered structure containing iron and titanium nitrides (Fe11N, TiN), offering improved load-bearing capacity and high surface hardness (fivefold increase compared to control sample). The presence of TiO2 phase formed during PVD coating contributes to the reduction in the friction coefficient. This innovative approach offers a promising advancement for extending the service life of AISI H13 components operating under sliding wear and frictional losses.