期刊
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
卷 209, 期 14, 页码 5377-5386出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2009.03.013
关键词
Glass-ceramic bond; cBN submicrocrystalline abrasive grains; Fracture toughness
This paper presents the results of research concerning the radial wear of super hard grinding wheels in the process of internal grinding of bearing rings. The new-developed grinding wheel is designed for bonding the abrasive grains of submicrocrystalline boron nitride using a glass-ceramic bond. This grinding wheel is compared to cBN grinding wheels composed from ceramic bonding systems, currently having application in industry. A crystalline phase from a group of single-diagonal pyroxenes of an XYSi2O6 type was generated at the glass-ceramic bond from a CaO-MgO-Al2O3-B2O3-SiO2 system. An influence of the presence of this phase on the bond fracture toughness coefficient K-Ic and the elastic modulus E of cBN grinding wheels was examined. Compared to grinding wheels comprising the commercial bond from a Na2O-K2O-Al2O3-B2O3-SiO2 system, the microcrystalline structure of the new-developed bond limits the range of its fragmentation in the process of grinding. It exerts a marked influence on the formation of different roughness profiles on the wheel working surface and the wear resistance, compared to a grinding wheel composed from a commercial bond. (C) 2009 Elsevier B.V. All rights reserved.
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