Difficult Problems and Its Countermeasures of Brazed Bonded Monolayer Diamond Grinding Wheel

Monolayer diamond grinding wheel Manufactured by brazing diamond grit to steel substrate of grinding wheel with active brazing filler mental has distinct advantages over traditional electroplated monolayer diamond grinding wheel.The paper pointed out the existing technical difficult problems,which are how to increase bond strength,how to improve the uniform of the brazing layer thickness,and how to realize regular distribution of diamond grit.Some countermeasures to solve them are discussed.Firstly,Ni-Cr or Ag-Cu-Cr alloy was used as an active filler mental for brazing diamond grit,which can provide high bond strengththrough Cr₇C₃ and Cr₂₃C₇ produced by interaction between Cr atom of Ni-Cr or Ag-Cu-Cr alloy and C stom of diamond surface at elevated temperature.Secondly,regular grits were distributed in accordance with optimized topography.On the analyses,a diamond grit wheel with high bond strength,regular grit distribution and uniform layer thickness of the brazed alloy was developed.