EFFECT OF CARBON, CHROMIUM, AND NICKEL ON THE ALPHA-REVERSIBLE-ARROW-GAMMA TRANSFORMATION AND PROPERTIES OF CR-NI-MO-V STEELS

The aim of the present investigation is to determine some regular feat ures of alloying Cr - Ni - Mo - V steels for critical parts with allow ance for the structure, hardenability, level of properties, and semibr ittleness temperature. For this purpose the concentration of carbon in Cr - Ni - Mo - V steels was varied from 0.03 to 0.47%, chromium from 0 to 4%, and nickel from 0 to 5% at a constant concentration of the ot her elements (similar to 0.5% Mo, 0.6% Mn, 0.25% Si, similar to 0.1% V , 0.015% S, 0.012% P), and the cooling rate from the austenitization t emperature was varied from 25 to 1000 degrees C/h.