It was first made by British R.A. Hadfield in 1882, so it is also called Hadfield steel. It contains about 1.2% carbon and 13% manganese. After quenching in water at 1000-1050℃, it can obtain a full austenite structure, so it is also called austenitic high manganese steel.
High manganese steel is a kind of wear-resistant steel specially provided for heavy industry. After anti-wear technology treatment, the surface of the material can reach 500-550 Brinell hardness and continue to maintain internal flexibility.
The cast structure of high manganese steel is usually composed of austenite, carbide and pearlite, and sometimes contains a small amount of phosphorus eutectic. When the number of carbides is large, they often appear in a network on the grain boundary. Therefore, the high manganese steel with cast structure is very brittle and cannot be used, and needs to be solution treated. The commonly used heat treatment method is solution treatment, that is, heating the steel to 1050-1100℃, keeping the cast structure to eliminate the cast structure, obtaining a single-phase austenite structure, and then quenching it with water to keep this structure at room temperature.
High manganese steel has good toughness and strong work hardening tendency, and shows excellent wear resistance under impact conditions. High manganese steel is mainly used to make jaw crusher tooth plates, excavator bucket teeth and railway turnouts. Application areas include quarrying, mining, excavation, coal industry, casting and steel industry.
After anti-wear technology treatment, the material surface can reach 500-550 Brinell hardness, continue to maintain internal flexibility, minimize surface friction, can be welded with high manganese steel or similar materials, can be cut by acetylene oxygen torch, non-magnetic, etc.
