The effects of annealing conditions on microstructure evolution and strengthening mechanisms are investigated based on microalloyed medium manganese steel. The diffusion of C and Mn atoms is altered with increase in annealing temperatures or annealing time. Microstructure and mechanical properties are studied. It is found that the retained austenite generated by the reverse transformation of martensite is used to improve the strength and ductility during the intercritical temperature region. The total elongation (TE) is related to the fraction and stability of retained austenite. High strength is also obtained when there is almost no retained austenite below Ac₁ temperature.

中文翻译：

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退火工艺对中微锰钢组织和力学性能的影响

基于微合金化中锰钢，研究了退火条件对组织演变和强化机理的影响。C和Mn原子的扩散随着退火温度或退火时间的增加而改变。研究了组织和力学性能。已经发现，由马氏体的逆相变产生的残余奥氏体被用来提高临界温度范围内的强度和延展性。总延伸率（TE）与残余奥氏体的分数和稳定性有关。当在Ac ₁温度以下几乎没有残留奥氏体时，也可以获得高强度。