关键词: cBN;涂覆;陶瓷结合剂

Abstract: By using scanning electron microscopy (SEM), differential scanning calorimetry-thermogravimetry(DSC-TG)and mechanical strength tester,the properties of cBN abrasive with different coatings for vitrified cBN grinding tools were compared.The result shows that the thermal and mechanical properties of cBN grains with corundum coating are not significantly changed, but the bend strength is decreased for vitrified cBN grinding tool.The bend strength of titanium coated cBN grains for vitrified grinding tool is increased,but the thermal and mechanical properties of titanium coated cBN grains are worse than before.The thermal and mechanical properties of cBN grains with glass coating are increased. The interface of abrasive and vitrified bond is strengthened and the grinding performance is improved.

Key words: cBN;coating;vitrified bond