Heat Treatment of Metals ›› 2021, Vol. 46 ›› Issue (7): 72-78.DOI: 10.13251/j.issn.0254-6051.2021.07.014

• MATERIALS RESEARCH • Previous Articles     Next Articles

Research progress of BL/M and AR/M multiphase controlling methods in martensitic steel and their influence on performance

Wei Xinhong1, Li Zhimin2, Zhang Xu1, He Wenchao1, Wang Yongheng1, Guo Han1, Li Shaohong1   

  1. 1. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming Yunnan 650093, China;
    2. Yunnan University of Business Management, Kunming Yunnan 650106, China
  • Received:2021-02-21 Online:2021-07-25 Published:2021-12-10

Abstract: The research progress of the lower bainite/martensite (BL/M) and retained austenite/martensite (AR/M) multiphase controlling methods to improve the properties of steels and the corresponding strengthening and toughening mechanisms were summarized in detail. The new heat treatment methods such as bainite isothermal quenching, quenching & partitioning (Q&P), quenching-partitioning-tempering (Q-P-T) were introduced. Also, the effects of multiphase controlling methods on microstructural characteristics and mechanical properties, as well as the key breakthrough problems in industrial application of the new heat treatments, were analyzed.

Key words: multiphase controlling, bainite isothermal quenching, quenching & partitioning process, quenching-partitioning-tempering process

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