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

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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).