The effect of solid-solution temperature on phase composition and tensile properties of vanadium-alloyed high interstitial steels

Abstract

Using different solid solution treatments, two structural states were produced in high-interstitial austenitic Fe-19Cr-22Mn-1.6V-0.4C-0.8N and Fe-22Cr-26Mn-1.3V-0.7C-1.2N (all in wt %) steels. Room temperature tensile properties of both steels are determined by a combination of several factors: solid-solution hardening of austenite with carbon and nitrogen, size and distribution of precipitates and grain size. Increase in solid-solution temperature from 1100 to 1200°C increases solid-solution hardening, decreases the particle strengthening effect in the steels and causes grain growth. The relation of these factors governs the value of a yield strength, ultimate tensile strength and elongation in the steel’s specimens.