Study on the performance and evaluating indexes of magnetic abrasive grains

Magnetic abrasive grains (MAG) are of importance to magnetic abrasive finishing. However, the theoretical studies on MAG are lack in depth and extents, till today, the researches on performance indexes of MAG have been part of blank space. At present, the indexes of evaluating properties of MAG are inconsistent, which, to a great extent, results in imperfection of preparation of MAG. In view of this situation, some technological parameters, which are chemical compositions, microstructure and thermostability, etc., are recommended through studying on bonded MAG. On the above basis, seven performance indexes related to MAG are suggested by studying on process parameters which influence the properties of MAG. Following is a quick survey of each: (1) Grain size; (2) Grain shape; (3) Loose density; (4) Ingredient ratio; (5) permeability; (6) Service life; (7) Economy. Furthermore, the performance indexes of MAG are somewhat different to its preparation process, for example, work temperature is another index for bonded MAG. Finally, some thought and tentative ideas are presented for further developing MAG.