Microstructure and performance of self-lubrication CBN grinding wheels

作者：Ding Wenfeng^*; Xu Jiuhua; Chen Zhenzhen; Yang Changyong; Su Honghua; Fu Yucan

来源：International Journal of Abrasive Technology, 2012, 5(1): 62-71.

DOI：10.1504/IJAT.2012.046817

• cBN grinding wheel
• Composite blocks
• Difficult-to-cut materials
• Fracture morphology
• Graphite films
• Graphite particles
• Grinding temperatures
• Interfacial microstructure
• Self-lubrication

Cu-Sn-Ti alloy, CBN grains and graphite particles were mixed, moulded and sintered to prepare the self-lubrication CBN abrasive composite blocks and grinding wheels. The mechanical strength of the composite blocks was measured. The fracture morphology and the interfacial microstructure of blocks were characterised. Dressing experiments were conducted. The graphite film was observed on the working surface. Finally, the grinding temperature of self-lubrication CBN grinding wheel was compared with that of the vitrified counterpart. The obtained results show that the bending strength of the composite blocks reaches 116 MPa in case of 5 wt.% graphite particles. Chemical joining has happened within the interface of CBN/Cu-Sn-Ti and graphite/Cu-Sn-Ti. Graphite film has been formed successfully and spread to the working layer surface after dressing. The grinding temperature of the self-lubrication CBN wheel is lower than that of the vitrified counterparts. All this indicates the potential of the graphite self-lubrication CBN grinding wheels in machining difficult-to-cut materials.

• 出版日期2012
• 单位南京航空航天大学