Project Report on Reverse Austenitic Formation in 301 in Steel

Abstract

In recent years there has been an increasing interest in improving the mechanical properties of commercially available austenitic steels, so that these highly corro-sion resistant material cans be utilized in structural applications and automotive safety components. Nitrogen alloying and cold rolling are typically utilized to incr-ease the strength. However In conventional austenitic stainless steels, there is a low limit for nitrogen solubility, and cold working reduces ductility and forma-bility properties. In this context, a novel technique, the reversion annealing of heavily cold deformed metas-table austenitic Cr-Ni steels, has been employed. In this technique, upon annealing the strain induced martensite transforms to austenite, and the reverted has shown to have submicron grain structure, which leads to a higher strength. In this project work, effect of cold working and the annealing temperature and time on the evolved properties have been studied.