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YANG Zhibo, XU Jiuhua, LIU Aiju. Analysis on interfacial microstructure of laser brazing diamond grits[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2010, (10): 9-12.
Citation: YANG Zhibo, XU Jiuhua, LIU Aiju. Analysis on interfacial microstructure of laser brazing diamond grits[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2010, (10): 9-12.
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Analysis on interfacial microstructure of laser brazing diamond grits

  • 1.

    School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454000, China

  • 2.

    College of Mechanical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

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  • Received Date: May 31, 2009
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    • Abstract
  • Diamond grits was brazed to steel substrate by using Ni-based filler alloy via laser in an argon atmosphere.The brazed diamond grits were detected by scanning electron microscopes(SEM),X-ray diffraction(XRD) and energy dispersive X-ray spectroscopy(EDS).The formation mechanism of carbide layers between the brazing filler metal and the diamond was discussed.All the results indicate that high strength bonding between diamond grits and the steel substrate has been successfully realized because the chromium in the Ni-based alloy segregated preferentially to the surface of the diamond to form a chromium-rich reaction product,and the bond between the alloy and the steel substrate is established through a cross-diffusion of iron and Ni-based alloy.
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