Study on grinding nickel-based superalloy GH4169 with ceramic bond CBN wheel controlling abrasive orientation by magnetic field

Ceramic cubic boron nitride (CBN) wheel is widely used in grinding field for its superior grinding performance. The random grain orientation of CBN grinding wheel with ceramic bond affects its grinding performance to a certain extent. In this paper, magnetically controlled ceramic CBN grinding wheel was prepared by magnetic field and sintering process. In order to improve the magnetic conductivity of the abrasive grains, nickel-plated CBN was used to replace the abrasive particles. It was found that the direction of the abrasive particles could be effectively controlled by adjusting the strength and properties of the magnetic field, so that the abrasive particles presented a chain distribution under the magnetic field. The experimental results showed that the nickel-plated CBN abrasive grains have good orientation and chain distribution in the bond power by using alternating magnetic field. Finally, experiments were carried out to study the grinding of GH4169 with magnetically controlled ceramic CBN grinding wheel, and the experimental results were compared with common ceramic CBN grinding wheel. It was confirmed that the grinding temperature and grinding force of GH4169 with magnetically controlled ceramic CBN grinding wheel were slightly lower than that of common grinding wheel, and the grinding surface quality is better than that of ordinary grinding wheel. In this paper, the method of preparing ceramic CBN grinding wheel with controllable grain orientation was established, and the system of evaluating the grinding wheel performance was constructed. It enriched the preparation process of ceramic bond CBN grinding wheel, and would have important significance for further expanding the application of ceramic CBN grinding wheel.