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| Mechanical Properties of Steels Treated by Q-P-T Process Incorporating Carbide-free-bainite/martensite Multiphase Microstructure |
| Zhun-li TAN1,Kai-kai WANG1,Gu-hui GAO1,Xiao-lu GUI1,Bing-zhe BAI1,2,Yu-qing WENG3 |
1. Materials Science and Engineering Center, Beijing Jiaotong University, Beijing 100044, China
2. Key Laboratory of Advanced Materials, School of Materials Science and Engineering, TsinghuaUniversity, Beijing 100084, China
3. The Chinese Society for Metals, Beijing 100044, China |
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Abstract 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��%, 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.
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Received: 19 June 2013
Published: 20 February 2014
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| Fund:National Outstanding Youth Science Foundation of China;Project guided by science and technology in Inner Mongolia Autonomous Region |
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Corresponding Authors:
Zhun-Li TAN
E-mail: tzli@bjtu.edu.cn;02lzhtan@163.com
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2014, Vol. 21 
