The effects of different heat treatment processes on microstructure evolution and tensile properties of Fe-0.11C-5.23Mn-1.11Al-0.10Si medium-Mn steel were investigated. The uniaxial tensile properties of tension specimens after heat treatment were tested, and the relationship between different annealed microstructures and tensile properties was analyzed; furthermore, the optimum heat treatment parameters were explored. Besides, the water-quenched sample exhibited an extensive TRIP effect than the furnace-cooled sample. The optimum microstructure and mechanical properties can be obtained when the sample is intercritically annealed at 625 °C for 4 h and then water-quenched. At the same time, the work hardening rate of the experimental steel is expounded, which provides theoretical reserve and technical support for the practical application of this kind of steel.

研究了不同热处理工艺对Fe-0.11C-5.23Mn-1.11Al-0.10Si中锰钢组织演变和拉伸性能的影响。测试了热处理后拉伸试样的单轴拉伸性能，分析了不同退火组织与拉伸性能之间的关系。此外，探索了最佳热处理参数。此外，水淬样品比炉冷样品表现出更大的TRIP效应。当样品在625°C下进行临界退火4小时，然后水淬时，可以获得最佳的显微组织和机械性能。同时阐述了实验钢的加工硬化率，