Rezumat
The investigation is made of structure and properties of sealing rings made from iron (Si - 2,8-3,0; Mn - 0,4-0,6; Cr - 0,1-0,2; Ni - 0,5-0,6; Cu - 0,7-0,9; Mg - 0,04-0,06; C - 2,8-3,0 mass. %) under their expo- sure to 5.28-MHz pulsed magnetic field. The changes observed are associated with eutectoid morphology, internal structure of graphite inclusions as well as with free cementite inclusion sizes which result in hard- ness increase. On their pulse magnetic processing the compressive stresses are initiated in sealing rings. Physicomechanical ring properties are periodically changed with varying the number of processing cycles. The optimum mode corresponds to two cycles.