Abstract Properties of three different kinds of low-temperature vitrified bonds were studied.It was found that vitrified bond V2,of which refractory was 775^oC,fluidity was 110％～1 30％thermal expansion was 5.79�10^-6oC^-1,had good colligation properties.TG and TGA analysis results showed that no crystals were observed in bond in the testing temperature.The flexural strength of CBN tools made with vitrified bond V2 were 67.5 MPa when sintered under temperature 800 CC.Vitrified bond CBN tools were tested and showed good sharpness,long life and no need of dressing during the machining.The ground surface of vitrified bond CBN tool was investigated by means of scanning electron microscope(SEM),and it was found that CBN grits were bonded firmly by vitrified bond and with uniform microstructure.

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