Method of finishing ferromagnetic articles by ferromagnetic abrasive powders in magnetic field

A method for finishing ferromagnetic articles by ferromagnetic abrasive powders in a magnetic field, wherein an external magnetic field is formed by electromagnets of different polarities, comprising the steps of:

• magnetizing said ferromagnetic abrasive powder and said ferromagnetic article to saturation induction;
• placing said magnetized ferromagnetic article in said external magnetic field so that a gap is formed between the poles of the electromagnets and said magnetized ferromagnetic article, wherein a total magnetic field is created, said total magnetic field being the sum of the external magnetic field and the field of said magnetized article;
• introducing said magnetized ferromagnetic abrasive powder into the gap formed by the poles of the electromagnets and said magnetized ferromagnetic article;
• and
• imparting a relative motion to said magnetized ferromagnetic article and the external magnetic field formed by said electromagnets of different polarities.