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<p>To address the issues of surface roughness and spheroidization in the internal channels of additively manufactured high-temperature alloys with a large aspect ratio, a study on abrasive water jet polishing using synthetic silicon carbide was conducted. A full factorial experimental design was employed to explore the effects of three sets of process parameters: polishing pressure, abrasive concentration, and polishing time, on the quality of the channel surfaces. Additionally, the finishing effects of two different abrasive particle sizes under these parameters were compared. A generalized factorial regression model was constructed, which indicated that the significant factors affecting the surface quality of the channels were, in order, pressure, concentration, and time. An analysis of the process parameters and measurement data was carried out, determining the optimal polishing parameters for the internal flow channels. When the polishing pressure was set at 8&#xa0;MPa, the abrasive concentration at 20%, and the polishing time at 15&#xa0;min, the surface roughness of the internal channels polished with 80 mesh silicon carbide abrasive was reduced from Ra 8.186 to Ra 0.422&#xa0;μm. The surface characteristics of the flow channel were analyzed using surface morphology. The experiments clearly enhanced the finishing and surface quality of internal flow channel in additively manufactured high-temperature alloys, effectively solving the problem of spheroidization that occurs during the printing process of additive metal components.</p>

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Optimization of abrasive water jet polishing parameters for internal channels in additively manufactured high-temperature alloys

  • 期刊论文

  • 发表日期：

    2025年4月3日

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  • Jinjin Liu,
  • Yanhao Hou,
  • Zhanshuang Wang,
  • Yizhou Wu,
  • Yajun Wang,
  • Weiwei Liu

摘要

To address the issues of surface roughness and spheroidization in the internal channels of additively manufactured high-temperature alloys with a large aspect ratio, a study on abrasive water jet polishing using synthetic silicon carbide was conducted. A full factorial experimental design was employed to explore the effects of three sets of process parameters: polishing pressure, abrasive concentration, and polishing time, on the quality of the channel surfaces. Additionally, the finishing effects of two different abrasive particle sizes under these parameters were compared. A generalized factorial regression model was constructed, which indicated that the significant factors affecting the surface quality of the channels were, in order, pressure, concentration, and time. An analysis of the process parameters and measurement data was carried out, determining the optimal polishing parameters for the internal flow channels. When the polishing pressure was set at 8 MPa, the abrasive concentration at 20%, and the polishing time at 15 min, the surface roughness of the internal channels polished with 80 mesh silicon carbide abrasive was reduced from Ra 8.186 to Ra 0.422 μm. The surface characteristics of the flow channel were analyzed using surface morphology. The experiments clearly enhanced the finishing and surface quality of internal flow channel in additively manufactured high-temperature alloys, effectively solving the problem of spheroidization that occurs during the printing process of additive metal components.