中文

Journal of Applied Sciences ›› 2002, Vol. 20 ›› Issue (1): 10-13.

• Articles • Previous Articles     Next Articles

A Research on the Framework of Organization of Brazed Mono-layer Diamond Grinding Wheel with Ni-Cr Alloy

WU Zhi-bin1, XU Hong-jun1, YAO-Zheng-jun1, XIAO Bing1, FU Yu-can2   

  1. 1. School of Mechanical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China;
    2. Open Lab of Material Design and Material Mechanical Properties, University of Science and Technology of China, Hefei 230001, China
  • Received:2000-11-15 Revised:2001-05-15 Online:2002-03-31 Published:2002-03-31

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Abstract: We have successfully developed a brazed mono-layer diamond grinding wheel with Ni-Cr alloy under Ar atmosphere. SEM-EDS microanalyses have shown that during brazing the chromium present in the alloy segregated preferentially to the surface of the diamond to form a chromium-rich reaction product. X-ray diffraction revealed that the wetting and bonding behavior on the diamond surface by Ni-Cr alloy melt is realized through Cr7C3 which is produced by interaction between Cr atoms of Ni-Cr alloy and C atoms of the diamond surface at elevated temperatures.The analyses also revealed that the bond between the alloy and the steel substrate was established through a cross-diffusion of iron and chromium and the formation of (Fex Cry) C-type carbides.Finally a grinding test show ed that the wear modes of such a brazed grinding wheel were mainly grit fracture and attrition rather than grit dislodgment from the bond.

Key words: mono-layer diamond abrasive wheels, framework of organization, braz

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