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| Research Progress of Microstructure Control and Strengthening Mechanism of QPT Process Advanced Steel with High Strength and Toughness |
LI Wei( ), JIA Xingqi, JIN Xuejun |
| Institute of Phase Transformation and Structure, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China |
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Cite this article:
LI Wei, JIA Xingqi, JIN Xuejun. Research Progress of Microstructure Control and Strengthening Mechanism of QPT Process Advanced Steel with High Strength and Toughness. Acta Metall Sin, 2022, 58(4): 444-456.
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Abstract Advanced high-strength steels have undergone rapid development from the first to third generation, which has considerably contributed to the continuous improvement of lightweight materials and safety in the automotive industry. The third generation representative steels, including quenching-partitioning (QP) and quenching-partitioning-tempering (QPT) steels have rapidly developed in the past 10 years. This article summarizes the preparation process as well as the strengthening and toughening mechanisms of QP and QPT steels from the following perspectives: (1) process design development and principles from QP to QPT, (2) carbon distribution and microstructure evolution during the partitioning process, (3) stability of metastable austenite and its influence on transformation-induced plasticity, (4) microstructure and heat-treatment process design of nanoprecipitation-strengthened QPT steel, (5) the integrated process of hot-forming QPT steel, and (6) the strengthening and toughening mechanisms and the service performance of QP and QPT steels. Finally, future prospects for manufacturing and using QP and QPT steels are discussed.
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Received: 01 December 2021
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| Fund: National Natural Science Foundation of China(52071209);National Natural Science Foundation of China(51831002);National Key Research and Development Program of China(2017YFB0703003) |
About author: LI Wei, associate professor, Tel: (021)54745567, E-mail: weilee@sjtu.edu.cn
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