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<p>Dry sliding of C235 steel against quench-hardened C45 steel is performed at a&#xa0;high-density alternating electric current. The contact layer is subjected to plastic deformation. The formation of a&#xa0;tribolayer consisting mainly of FeO and α‑Fe phases is demonstrated. The contact surface is found to contain two sectors with different morphological features. One of the sectors shows the signs of melt formation. Using an EDX analysis, higher oxygen content is demonstrated in the melt zone, compared with that in the other sector. Oxygen serves as an indicator of FeO formation. A&#xa0;decrease in the oxygen concentration is found with the increasing distance from the sliding surface. It is noted that this is not indicative of a&#xa0;gradient structure. These data are used to calculate the melt layer thickness, which decreases with the decreasing electrical power at the contact spot. The maximum power at the contact spots causes the formation of a&#xa0;melt layer thinner than 7 μm under mild wear conditions. The calculation serves as the evidence for melt formation due to Joule heat, but not due to electric arc formation. A&#xa0;tribolayer scheme consisting of three sublayers is proposed.</p>

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On the possibility of melting the contact layer of steel in dry sliding against steel under electric current

  • 期刊论文

  • 发表日期：

    2026年6月23日

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  • M. I. Aleutdinova,
  • V. V. Fadin

摘要

Dry sliding of C235 steel against quench-hardened C45 steel is performed at a high-density alternating electric current. The contact layer is subjected to plastic deformation. The formation of a tribolayer consisting mainly of FeO and α‑Fe phases is demonstrated. The contact surface is found to contain two sectors with different morphological features. One of the sectors shows the signs of melt formation. Using an EDX analysis, higher oxygen content is demonstrated in the melt zone, compared with that in the other sector. Oxygen serves as an indicator of FeO formation. A decrease in the oxygen concentration is found with the increasing distance from the sliding surface. It is noted that this is not indicative of a gradient structure. These data are used to calculate the melt layer thickness, which decreases with the decreasing electrical power at the contact spot. The maximum power at the contact spots causes the formation of a melt layer thinner than 7 μm under mild wear conditions. The calculation serves as the evidence for melt formation due to Joule heat, but not due to electric arc formation. A tribolayer scheme consisting of three sublayers is proposed.