CN 41-1243/TG ISSN 1006-852X
Volume 45 Issue 4
Aug.  2025
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LI Wei, XIAO Bing, HE Xu, ZHANG Zili, ZHOU Lulu, XIAO Haozhong. Study on performance of brazed micronized diamond grinding head[J]. Diamond & Abrasives Engineering, 2025, 45(4): 479-485. doi: 10.13394/j.cnki.jgszz.2024.0025
Citation: LI Wei, XIAO Bing, HE Xu, ZHANG Zili, ZHOU Lulu, XIAO Haozhong. Study on performance of brazed micronized diamond grinding head[J]. Diamond & Abrasives Engineering, 2025, 45(4): 479-485. doi: 10.13394/j.cnki.jgszz.2024.0025

Study on performance of brazed micronized diamond grinding head

doi: 10.13394/j.cnki.jgszz.2024.0025
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  • Received Date: 2024-01-30
  • Accepted Date: 2024-06-19
  • Rev Recd Date: 2024-05-02
  • Available Online: 2024-06-21
  •   Objectives  The use of brazing micro-powder diamond tools can achieve high-precision and efficient processing of ceramic materials. However, there are currently problems such as thin brazing layers, large abrasive damage during brazing, and poor bonding between the brazing material and the base metal. Current research has not been able to analyze the brazing effect from the micro-interface.  Methods  Brazing samples are prepared, and the surface morphology and the morphology of diamond abrasive particles and surface products are observed with a scanning electron microscope (SEM). The phases of the compounds on diamond are analyzed with an X-ray diffractometer. The cross-sectional structure of the brazing samples are observed with the backscattered electron imaging mode of SEM. The elemental composition of the bonding interface of the brazing samples is analyzed with an energy dispersive spectrometer (EDS). A grinding head is prepared to machine an alumina ceramic plate on a JDHGT type engraving machine, and it is compared with an electroplated grinding head.  Results  The exposure height of the micro-diamond abrasive is reasonable with no accumulation. The diamond is not over-consumed, and a plate-like Cr3C2 is generated on the diamond surface. There is sufficient elemental diffusion between the brazing alloy and the base metal. Products at the interface between the steel substrate and the brazing alloy are a γ-phase solid solution formed by Cr and Fe, and a Ni-Fe substitutional solid solution by Fe and Ni, which ensures a firm combination between the brazing alloy and the base metal.  Conclusions  The life of the brazed micro-diamond head is three times longer than that of the electroplated grinding head. The situation of abrasive particle breakage and shedding in the brazed grinding head is less, and there is no phenomenon of brazing alloy layer peeling. This proves that the brazing effect of micro-diamond is better, and the method of processing ceramics with brazed micro-diamond tools is feasible.

     

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