中文摘要：

A 0.2C-1.5Mn-1.5Si-0.6Cr-0.05Nb (wt%) 钢被过程并且传统的熄灭和 tempering (Q&T ) 为比较处理的新奇 quenching-partitioning-tempering (Q-P-T ) 分别地对待。X 光检查衍射分析显示 Q-P-T 钢有大约 10% 保留的奥氏体，但是 Q&T 钢几乎没有一个。随从 7 nitic 的压缩紧张率的增加，铁酸盐，而是它与温度增加展出力量的更慢的减少。在小粒的 bainite 和 bainitic 铁酸盐的脱臼密度在高温度经由恢复和再结晶减少。然而， bainite 再热什么时候低于 600 在温度被执行？？

英文摘要：

A 0.2C-1.5Mn-1.5Si-0.6Cr-0.05Nb （wt%） steel is treated respectively by novel quenching-partitioning-tempering （Q-P-T） process and traditional quenching and tempering （Q＆T） process for comparison. X-ray diffraction analysis indicates that Q-P-T steel has about 10% retained austenite, but Q＆T steel hardly has one. With the increase of com- pression strain rate from 7 × 10^2 to 5 × 10^3 s^-1, the flow stress of Q-P-T steel increases, which demonstrates the positive strain rate effect, but does not exist in Q＆T steel. The characterization of scanning electron microscopy indicates that a large number of long, straight martensite laths in Q-P-T steel will bend or be destroyed by large compressive strain of 35% at 5 × 10^3 s^-1. However, relative small compressive s~xain of about 5% at 7× 10^2 s^-1 almost does not have any effect on the original lath morphology. The characterization of transmission electron microscopy further reveals the origin of the positive strain rate effect and the microstructural evolution during dynamic compressive deformation.