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<p>To meet the increasing demand for flexible tools in precision machining, this study reports the fabrication of brazed diamond abrasive belts on ultra-thin flexible substrates—an area that remains underexplored. Herein, ultra-thin nickel-plated diamond belts are fabricated via a brazing process employing a 304 stainless steel mesh as the flexible substrate. The effects of brazing temperature (850–950&#xa0;°C) and holding time (25-45&#xa0;min) on the interfacial microstructure and wear performance were systematically investigated. Brazing experiments were conducted in an argon atmosphere using a Cu-Sn-Ti filler alloy. The interfacial reaction products and wear morphology after grinding against an ultra-hard A359-SiCp/Fe composite were characterized by scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), and X-ray diffraction (XRD). The results indicate that TiC forms due to a metallurgical reaction between Ti and diamond. An increase in the brazing temperature promotes TiC formation, which saturates at 900&#xa0;°C. Holding time primarily influences the brazing morphology; a 30-minute duration achieves optimal wetting with a suitable diamond exposure area. Metallographic analysis of the 304 stainless steel mesh substrate reveals that after brazing at 900&#xa0;°C for 30&#xa0;min, the austenite grains are refined from 12.6 to 6.8&#xa0;μm, and the initially banded ferrite becomes spheroidized and uniformly distributed. This microstructural evolution demonstrates that the substrate undergoes no thermal degradation but instead exhibits improved metallurgical uniformity under the optimized brazing condition. Consequently, the belt brazed at 900&#xa0;°C exhibits a 26.25% reduction in wear compared to that at 850&#xa0;°C, indicating significantly improved grinding performance. The primary diamond wear mechanisms are grain dulling, fracture, and detachment. Nickel plating was applied to the diamond particles as a pretreatment to reduce thermal damage during brazing. This study determines the optimal brazing parameters for diamond abrasive belts, thereby providing both fundamental experimental evidence and practical technical guidance for their application in precision machining.</p>

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The Influence of Brazing Temperature and Holding Time on the Microstructure and Frictional Wear Performance of Ultra-Thin Abrasive Diamond Belts

  • 期刊论文

  • 发表日期：

    2026年4月17日

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  • Qing Meng,
  • Guoqiu He,
  • Xiaoshan Liu,
  • Ruoyun Li,
  • Yinfu Liu,
  • Zhiqiang Zhou

摘要

To meet the increasing demand for flexible tools in precision machining, this study reports the fabrication of brazed diamond abrasive belts on ultra-thin flexible substrates—an area that remains underexplored. Herein, ultra-thin nickel-plated diamond belts are fabricated via a brazing process employing a 304 stainless steel mesh as the flexible substrate. The effects of brazing temperature (850–950 °C) and holding time (25-45 min) on the interfacial microstructure and wear performance were systematically investigated. Brazing experiments were conducted in an argon atmosphere using a Cu-Sn-Ti filler alloy. The interfacial reaction products and wear morphology after grinding against an ultra-hard A359-SiCp/Fe composite were characterized by scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), and X-ray diffraction (XRD). The results indicate that TiC forms due to a metallurgical reaction between Ti and diamond. An increase in the brazing temperature promotes TiC formation, which saturates at 900 °C. Holding time primarily influences the brazing morphology; a 30-minute duration achieves optimal wetting with a suitable diamond exposure area. Metallographic analysis of the 304 stainless steel mesh substrate reveals that after brazing at 900 °C for 30 min, the austenite grains are refined from 12.6 to 6.8 μm, and the initially banded ferrite becomes spheroidized and uniformly distributed. This microstructural evolution demonstrates that the substrate undergoes no thermal degradation but instead exhibits improved metallurgical uniformity under the optimized brazing condition. Consequently, the belt brazed at 900 °C exhibits a 26.25% reduction in wear compared to that at 850 °C, indicating significantly improved grinding performance. The primary diamond wear mechanisms are grain dulling, fracture, and detachment. Nickel plating was applied to the diamond particles as a pretreatment to reduce thermal damage during brazing. This study determines the optimal brazing parameters for diamond abrasive belts, thereby providing both fundamental experimental evidence and practical technical guidance for their application in precision machining.