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<p>In this study, samples obtained from 1.3343 high-speed steel punches with TiN coatings were tested. The samples were subjected to heat treatment at different cryogenic temperatures (&lt;196 °C) and durations (12, 24 and 36 h), followed by tempering at two different temperatures (200, 500 °C). For performance testing, a ball-on-disk wear test setup was utilized and a total of 6 groups of samples were examined. The effects of cryo-treatment and tempering on microstructure were revealed through microstructural analysis with scanning electron microscopy (SEM), X-ray (XRD diffraction), and Rietveld analysis. Additionally, the hardness of the punches was measured with microhardness measurements. The optimal wear resistance was observed in the 36 h deep cryo-treated and 200 °C tempered samples. The characterization study indicates that by cryogenic treatment a significant portion of the retained austenite transformed into martensite and secondary carbides formed, resulting in improved wear resistance and a slight increase in hardness.</p>

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Enhancing wear resistance of TiN-coated 1.3343 high-speed steel punches through deep cryogenic treatment and tempering

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • Ferhat Cerıtbınmez,
  • Fatih Hayati Çakir,
  • Berkent Parım

摘要

In this study, samples obtained from 1.3343 high-speed steel punches with TiN coatings were tested. The samples were subjected to heat treatment at different cryogenic temperatures (<196 °C) and durations (12, 24 and 36 h), followed by tempering at two different temperatures (200, 500 °C). For performance testing, a ball-on-disk wear test setup was utilized and a total of 6 groups of samples were examined. The effects of cryo-treatment and tempering on microstructure were revealed through microstructural analysis with scanning electron microscopy (SEM), X-ray (XRD diffraction), and Rietveld analysis. Additionally, the hardness of the punches was measured with microhardness measurements. The optimal wear resistance was observed in the 36 h deep cryo-treated and 200 °C tempered samples. The characterization study indicates that by cryogenic treatment a significant portion of the retained austenite transformed into martensite and secondary carbides formed, resulting in improved wear resistance and a slight increase in hardness.