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<p>The wear modes of Ni-based superalloy (K418) rotating shaft respectively paired with a diamond-like carbon (DLC) seal ring, a chromium-based ceramic composite coated steel (CKS) seal ring and a high-speed steel (HSS) seal ring in a turbocharger was investigated. Under dry friction and oil lubrication conditions, the DLC-K418 tribopair exhibited excellent friction reduction and wear resistance with only minor damage on its worn surface. Under dry friction conditions, the CKS-K418 tribopair exhibited poor friction and wear performance with severe adhesive tearing and plastic flow on the worn surface. Under oil lubrications, its wear resistance was significantly enhanced with only minor fatigue spalling observed on the worn surface. Under dry friction and oil lubrication conditions, the HSS-K418 tribopair exhibited the worst performance, with severe adhesive wear occurring on its worn surface. This provides a theoretical basis for the matching design of turbine end seal rings and rotating shafts.</p>

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Wear Analysis of Different Seal Ring Paired with K418 Rotating Shaft in Turbocharger

  • 期刊论文

  • 发表日期：

    2025年11月10日

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  • Jie Liu,
  • Yan Shen,
  • Hui Qiang,
  • Zhixiang Liu,
  • Baihong Yu,
  • Jinghao Qu,
  • Tongshan Zhang

摘要

The wear modes of Ni-based superalloy (K418) rotating shaft respectively paired with a diamond-like carbon (DLC) seal ring, a chromium-based ceramic composite coated steel (CKS) seal ring and a high-speed steel (HSS) seal ring in a turbocharger was investigated. Under dry friction and oil lubrication conditions, the DLC-K418 tribopair exhibited excellent friction reduction and wear resistance with only minor damage on its worn surface. Under dry friction conditions, the CKS-K418 tribopair exhibited poor friction and wear performance with severe adhesive tearing and plastic flow on the worn surface. Under oil lubrications, its wear resistance was significantly enhanced with only minor fatigue spalling observed on the worn surface. Under dry friction and oil lubrication conditions, the HSS-K418 tribopair exhibited the worst performance, with severe adhesive wear occurring on its worn surface. This provides a theoretical basis for the matching design of turbine end seal rings and rotating shafts.