湖南大学学报（自然科学版）2011，Vol.38Issue(9)：64-69,6.
ZnO/Na2O(mol)对cBN陶瓷砂轮性能的影响
Effect of ZnO/Na2O (mol) on the Properties of cBN Vitrified Bond Grinding Wheel
摘要
Abstract
The effect of ZnO/Na2O molar ratio(Z)on the properties of Li2O-K2O-SiO2-Al2Q3-BgO3 system vitrified bonds and Cbn grinding wheels were studied with TG-DSC, X-ray diffraction analysis, scanning electron microscopy and thermal expansion coefficient tests. The results showed that the lower inflation crystalline phase ( Li2 OAl2 O37.5 SiO2)appeared in the vitrified bond. And by increasing the ratio of Z, all the vitrified bonds' topographic crystal temperature, softening temperature, crystal quantity and density increased while the crystal size was reduced. When the wheel formula was fixed, the porosity of wheel decreased by increasing the ratio of Z while the bulk density, hardness and bending strength all increased. But G-ratio(dry-rubbing QT400)increased at the beginning, and then became lower. When the ratio of Z was 0. 75, the values of vitrified bonds' expansion coefficient and softening temperature were 6. 902 9× 10-6K-1 and 805 °C , respectively. Meanwhile, the bending strength, the porosity and G-ratio of Cbn grinding wheel were 73. 97 Mpa,15. 65% and 156. 42%, respectively.关键词
砂轮/陶瓷结合剂/立方氮化硼/抗折强度/磨耗比Key words
grinding wheel/ vitrified bonder/ Cbn/ bending strength/ abrasive ratio分类
矿业与冶金引用本文复制引用
万隆,翟浩冲,胡伟达,刘小磐,张国威,王志起..ZnO/Na2O(mol)对cBN陶瓷砂轮性能的影响[J].湖南大学学报（自然科学版）,2011,38(9):64-69,6.基金项目
湖南省科技厅资助项目(2009GK3140) （2009GK3140）
长沙市科技计划项目(K09050121-11) （K09050121-11）
