Mechanical Properties of Steels Treated by Q-P-T Process Incorporating Carbide-free-bainite/martensite Multiphase Microstructure

作者：Tan Zhun li^*; Wang Kai kai; Gao Gu hui; Gui Xiao lu; Bai Bing zhe; Weng Yu qing

来源：Journal of Iron and Steel Research International, 2014, 21(2): 191-196.

• carbide-free bainite
• multiphase microstructure
• quenching-partitioning-tempering
• partitioning time
• mechanical property

Quenching-partitioning-tempering (Q-P-T) process were applied to a quenched carbide-free bainite/martensite (CFB/M) multiphase steel 40Mn2Si2Cr and its effect on the mechanical properties was studied. The results showed that the partitioning time of Q-P-T treatment can be increased greatly to 90 min or even longer. The tensile strength, elongation and product of strength and elongation (PSE) of the experimental steel can achieve 1650 MPa, about 20% and over 33 GPa . 5/a, respectively. The significant increase of partitioning time and excellent mechanical properties could be related to the CFB microstructure introduced in the quenching process during the Q-P-T treatment.

• 出版日期2014-2
• 单位北京交通大学; 清华大学