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<p>The present study investigated dry-sliding wear of two Cu-added (0.60 and 1.10&#xa0;wt pct) martensitic steels under 10 and 50&#xa0;N loads for railway applications. Initial hardness and load affected frictional heating, influencing oxide formation at the pin-disc interface. At 10&#xa0;N, the 0.60&#xa0;wt pct Cu specimen formed brittle Fe<sub>2</sub>O<sub>3</sub> layer, having specific wear rate (SWR: 3.09 × 10<sup>−5</sup> mm<sup>3</sup> m<sup>−1</sup> N<sup>−1</sup>). Contrary to earlier reports, the 1.10&#xa0;wt pct Cu-steel at 50 N formed a self-lubricating Fe<sub>2</sub>O<sub>4</sub> layer, significantly reducing the SWR (1.61 × 10<sup>−6</sup>&#xa0;mm<sup>3</sup>&#xa0;m<sup>−1</sup>&#xa0;N<sup>−1</sup>).</p>

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Unlocking Superior Wear Resistance in Cu-Modified Steels Through Enhanced Oxide Layer Adhesion

  • 期刊论文

  • 发表日期：

    2025年11月29日

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  • Kapil Dev Sharma,
  • Arnab Sarkar,
  • Suruj Protim Neog,
  • Sudipta Patra,
  • Anish Karmakar

摘要

The present study investigated dry-sliding wear of two Cu-added (0.60 and 1.10 wt pct) martensitic steels under 10 and 50 N loads for railway applications. Initial hardness and load affected frictional heating, influencing oxide formation at the pin-disc interface. At 10 N, the 0.60 wt pct Cu specimen formed brittle Fe2O3 layer, having specific wear rate (SWR: 3.09 × 10−5 mm3 m−1 N−1). Contrary to earlier reports, the 1.10 wt pct Cu-steel at 50 N formed a self-lubricating Fe2O4 layer, significantly reducing the SWR (1.61 × 10−6 mm3 m−1 N−1).