Abstract
The paper presents analytical models of a fixed magnetic field interaction with a ferromagnetic workpiece (hardened steel) during magnetoabrasive polishing. Analytical models assume that during an object's machining surface-adjacent zones of the surface layer are subject to temperature ranging from room temperature to temperature above the Curie point. A movement of a steel, hardened object in the magnetic field causes magnetoabrasive impact of the field upon ferromagnetic martensite, and the magnetic field energy disturbs the primary thermodynamic balance state of the surface layer zones subject to temperatures from the martensite transformation temperature range. Experimental research with Roentgen spectroscopy confirmed direct influence of a magnetic field upon the phase composition of hardened steel, and structural research of thin layers of c.a. 100nm with the application of Mosbauer spectroscopy indicate at decreasing amount of rudimentary austenite in the surface layer of a steel object after magnetoabrasive polishing. On the basis of the model prepared we have presented an interpretation of the object's surface layer physical features aiming at the explanation of the reasons from the increase of the abrasive wear resistance in the case of steel workpieces after magnetoabrasive polishing.
