Summary of differences in microstructure and properties between hot-rolled and cold-rolled annealing processes of medium manganese steel
As a representative of the third-generation advanced high-strength steel,medium manganese steel has become a hot research topic due to its excellent mechanical properties.The same type of medium manganese steel undergoes different rolling and heat treatment to produce different microstructure,resulting in differences in its mechanical properties.Therefore,it is very important to study the relationship between microstructure and mechanical properties of the medium manganese steel under different hot working processes.This article reviews the microstructure evolution of the medium manganese steel under hot rolling and cold rolling annealing processes,focusing on the research progress in the relationship between microstructure and static tensile mechanical properties,hydrogen embrittlement resistance,and low-temperature impact toughness.It also compares various methods to improve the mechanical properties of the medium manganese steel,and finally looks forward to the future research and development direction of strength and toughness of the medium manganese steel.
medium manganese steelhot rolled annealingcold rolled annealingmicrostructure