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<p>The present study investigates the correlation between the geometric characteristics of micro-textures and the processing parameters of maskless abrasive air jet machining (AAJM), successfully achieving the creation of micro-textures arrays on cast iron surfaces. Experimental validation confirmed the improved tribological performance. The results indicate that jet pressure is the most significant factor influencing the geometric characteristics of micro-textures, which can be attributed to the combined effects of increased particle kinetic energy and enhanced jet divergence. Abrasive flow rate has a minimal impact on diameter (F = 4.95) and circularity error (F = 21.37), while standoff distance has a negligible effect on depth. Compared to non-textured surfaces, microtextured cast iron surfaces exhibited a maximum reduction of approximately 40.7% in friction coefficient and 47.2% in wear mass. The wear mechanism transitions from ploughing wearing in non-textured plates to coexistence of flake peeling, pitting corrosion, and residual ploughing wearing on micro-textured surfaces.</p>

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Friction-reducing and wear-resistant micro-textures on cast iron via shape-controlled maskless abrasive air jet machining

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • Yue Dai,
  • Dun Liu,
  • Hankun Bao,
  • Jize Zhao,
  • Ruyi Zhao,
  • Hongtao Zhu,
  • Chuanzhen Huang,
  • Yifei Zhang,
  • Weijie Zhang

摘要

The present study investigates the correlation between the geometric characteristics of micro-textures and the processing parameters of maskless abrasive air jet machining (AAJM), successfully achieving the creation of micro-textures arrays on cast iron surfaces. Experimental validation confirmed the improved tribological performance. The results indicate that jet pressure is the most significant factor influencing the geometric characteristics of micro-textures, which can be attributed to the combined effects of increased particle kinetic energy and enhanced jet divergence. Abrasive flow rate has a minimal impact on diameter (F = 4.95) and circularity error (F = 21.37), while standoff distance has a negligible effect on depth. Compared to non-textured surfaces, microtextured cast iron surfaces exhibited a maximum reduction of approximately 40.7% in friction coefficient and 47.2% in wear mass. The wear mechanism transitions from ploughing wearing in non-textured plates to coexistence of flake peeling, pitting corrosion, and residual ploughing wearing on micro-textured surfaces.