INFLUENCE OF SPINODAL DECOMPOSITION ON MAGNETIC-PROPERTIES OF FE28CR16CO

For two iron alloys with 25-28% Cr, 16-18% Co and additions of alumini um and titanium a microstructure of phases or and gamma was obtained a fter quenching from annealing at 1200 degrees C. Hardness and magnetic properties grow up to 30-40 min of annealing at spinodal decompositio n temperature 630 degrees C. By longer annealing hardness remains virt ually unchanged, while magnetic properties decrease slightly. By isoch romal annealing in a temperature range of 620 to 650 degrees C the max imal hardness in attained at 620-630 degrees C and best magnetic prope rties at 640 degrees C. The optimal combination of magnetic properties and ductility is attained after spinodal decomposition at 640 degrees C.