Chromium - Iron - Manganese

Jan Vrestal

Introduction

The first extensive investigation of the Cr-Fe-Mn system was the determination of the polytherms at Cr content up to 20 mass% and Mn up to 30 mass% by [1934Koe] which made possible to determine the solidus univariant reaction lines and to draw a hypothetical liquidus projection relied upon interpolation between the binary axes. [1938Bur] deduced the isothermal section at 650°C from microscopic examination of alloys annealed for very long period of time at temperatures between 600°C and 1000°C. In this section the σ phase region was denoted. [1939Sch] confirmed the σ phase region in their isothermal section at 700°C. Unfortunately, their work was performed using alloys of the low-purity. Further experimental results were reported by [1949Gri...