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<p>In this work, Ti-ZrB<sub>2</sub> metal matrix composite (MMC) cladding thick layers were successfully fabricated on 316 stainless steels (SS) by plasma transfer arc (PTA) cladding process. The impact of PTA currents and coating powder composition on the tribological properties and microstructure of coatings has been investigated. The fabricated samples have been analyzed for quantitative analysis like microhardness, wear and qualitative analysis like x-ray diffractometer (XRD), scanning electron microscopy (SEM), energy-dispersive spectrometer (EDS). The XRD result shows that the composite coatings be made up of TiB<sub>2</sub>, ZrB<sub>2</sub>, TiB, ZrB, FeZr<sub>2</sub>, ZrB<sub>12</sub>, Fe<sub>8</sub>B, Zr and Ti<sub>2</sub>Zr hard phases. The maximum average microhardness value of composite coating has been found as 1827 HV<sub>0.1</sub>. The wear rate of coated sample has been determined to be 1.86 × 10<sup>−8</sup>&#xa0;g/N-m. Therefore, the optimum microhardness of the composite coating has been increased approximately 7.5 times, while wear resistance has increased approximately 22.5 times. It is expected that these improvements will make AISI 316 stainless steel more useful in tough industrial applications.</p>

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Microstructure and Tribological Performance of Ti/ZrB2 Composite Coating Developed on AISI 316 Stainless Steel by Plasma Cladding

  • 期刊论文

  • 发表日期：

    2025年11月10日

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  • Chandan Kumar,
  • Anil Kumar Das

摘要

In this work, Ti-ZrB2 metal matrix composite (MMC) cladding thick layers were successfully fabricated on 316 stainless steels (SS) by plasma transfer arc (PTA) cladding process. The impact of PTA currents and coating powder composition on the tribological properties and microstructure of coatings has been investigated. The fabricated samples have been analyzed for quantitative analysis like microhardness, wear and qualitative analysis like x-ray diffractometer (XRD), scanning electron microscopy (SEM), energy-dispersive spectrometer (EDS). The XRD result shows that the composite coatings be made up of TiB2, ZrB2, TiB, ZrB, FeZr2, ZrB12, Fe8B, Zr and Ti2Zr hard phases. The maximum average microhardness value of composite coating has been found as 1827 HV0.1. The wear rate of coated sample has been determined to be 1.86 × 10−8 g/N-m. Therefore, the optimum microhardness of the composite coating has been increased approximately 7.5 times, while wear resistance has increased approximately 22.5 times. It is expected that these improvements will make AISI 316 stainless steel more useful in tough industrial applications.