强磁场陶瓷结合剂CBN砂轮制备及磨削性能

针对陶瓷结合剂CBN砂轮磨粒取向随机，砂轮强度低的问题，将强磁场引入砂轮制备工艺.制备过程中添加了镀镍CBN磨粒，研究发现，适当磁场强度可以实现镀镍CBN磨粒的偏转；另外，适宜的磁场强度有利于提高陶瓷CBN复合材料的强度，当磁感应强度为6 T时，陶瓷CBN复合材料的抗折强度最高，强度值达到79.5MPa.通过开展磨削试验，证实了强磁场陶瓷结合剂CBN砂轮在磨削钛合金TC4时，其磨削比能略低于普通陶瓷结合剂CBN砂轮的比能，此项研究对提高陶瓷结合剂CBN砂轮性能以及探索新的制备工艺均有现实意义.

Preparation and Grinding Performance of High Magnetic Field Vitrified Bond CBN Grinding Wheel

In view of the random grain orientation and low strength of vitrified bond CBN wheel， a high magnetic field was introduced into the preparation process of grinding wheel. During the preparation process， the Ni-plating CBN abrasive grains were added. It was found that the appropriate magnetic field strength could achieve the deflection of the Ni-plating CBN. In addition， the appropriate magnetic field strength is conducive to improving the strength of vitrified CBN composite materials. When the magnetic field strength was 6 T， the bending strength of vitrified CBN composite materials was the highest， and the value reached 79.5 MPa. Finally， it is proved that the specific grinding energy of CBN grinding wheel with high magnetic field was slightly lower than that of ordinary vitrified bond grinding wheel when grinding titanium alloy TC4. This research may have important practical significance for improving the properties of CBN grinding wheel and exploring new preparation technology.