Hadfield's austenitic manganese steel is still commonly used for railroad components such as frogs and crossings and also for rock-handling materials. This material contains approximately 1.2% carbon and 12 to 14% Mn. This paper presents the microstructural development of the austenitic manganese steel-3401 due to different heating regimes followed by rapid cooling process. The material is heated to 1050°C followed by a rapid cooling process which caused the solid solution of the carbides to be precipitated in the grain of the pure austenite phase. The tempering temperature is set between 400°C to 550°C at 50° C interval. The microstructural examination of the samples showed that the formation of austenite begins by precipitation of iron and manganese carbides at the grain boundaries, progressively followed by the appearance of a new constituent which later extended to the interior of the grains. The new phase formation increased with increasing temperature, showing temperature dependence of formation.
|Number of pages||4|
|Journal||International Journal of Mechanical and Materials Engineering|
|Publication status||Published - 1 Dec 2007|
- Austenitic manganese steel-3401
- Microstructural mapping
- Rapid cooling