Influence of niobium on the hardening phenomenon and wear in the manganese steel \(12% Mn\) destined for the railway

Type : Publication
Auteur(s) :  manganese steel, effect of niobium, hardening, wear
Année :  2014
Domaine : Métallurgie
Revue : Materials science, engineering and chimistry.
Résumé en PDF :  (résumé en pdf)
Fulltext en PDF :  (.pdf)
Mots clés :  manganese steel, effect of niobium, hardening, wear.

Résumé : 

This study relates to the manufacture of austenitic manganese steel for the heartswitching crossings of railways in all industrial countries where heavy loads are movedby rail. This steel is characterized by a high surface hardness service yard caused by thephenomenon of hardening. According to the microstructure formed after quenching, thetransformation of austenite into martensite during working, determine the operating life.The rate of transformation of austenite into martensite can force a compromise betweenductility and wear resistance of the steel in order to withstand large forces without breaking.The objective of this study is to improve the resistance to abrasion and friction to cast stateand after heat treatment by the addition of niobium. This study permitted to develop a newshade of manganese steel can be integrated into the production of heart of railway switcheswith better lifecycle.