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设计了一种低层错能TWIP(Twinning Induced Plasticity)Fe-25Mn-1Al-0.2C钢,对该钢分别在900、1000和1100℃进行了固溶处理实验,研究了实验钢的微观组织和力学性能。结果表明:实验钢晶粒尺寸随着固溶温度的升高和时间的延长而增大。在1100℃时,退火孪晶贯穿整个晶粒。实验钢的抗拉强度随着固溶温度的升高而降低。当固溶温度为900℃时,随着真应变的增加,应变硬化率缓慢地降低。当固溶温度为1100℃时,均匀塑性变形分为三个阶段,并且观察到孪晶交割。
A TWIP (Twinned Induced Plasticity) Fe-25Mn-1Al-0.2C steel was designed and the microstructure and mechanical properties of the steel were studied at 900, 1000 and 1100 ℃, respectively. performance. The results show that the grain size of experimental steel increases with the increase of solution temperature and time. At 1100 ° C, the annealed twin runs through the entire grain. The tensile strength of experimental steel decreases with increasing solution temperature. When the solution temperature is 900 ° C, the strain hardening rate decreases slowly with increasing true strain. When the solution temperature is 1100 ℃, the uniform plastic deformation is divided into three stages, and twins delivery is observed.