STRUCTURE, MECHANICAL AND MAGNETIC-PROPERTIES OF STEEL 30KHGSA AFTER COMBINATION COLD-WORKING AND HEAT-TREATMENT

We have experimentally investigated the structure, mechanical and magn etic properties in steel 30KhGSA which has been deformed by hydrostati c extrusion to different degrees and is found in three different initi al states attained by refining (quenching + high-temperature tempering ), isothermal decomposition at 650 degrees C, and normalizing. We have shown that the studied magnetic properties (H-c, B-r, mu(max)) change most considerably in the initial stages of deformation (by up to 20%) , remaining practically constant in the 20-60% strain range. At the sa me time, the strength properties monotomically increase over the entir e range of studied strains.