Heat Treatment of Metals ›› 2022, Vol. 47 ›› Issue (3): 239-244.DOI: 10.13251/j.issn.0254-6051.2022.03.044

• NUMERICAL SIMULATION • Previous Articles     Next Articles

JMatPro calculation and experimental study of microstructure transformation of B1800HS hot-formed steel

Guo Yazhou1, Song Ninghong2, Ni Lei1, Ling Hua1, Bi Wenzhen3, Wei Xicheng2   

  1. 1. Passenger Vehicle Company, SAIC Motor, Shanghai 201804, China;
    2. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;
    3. State Key Laboratory of Development and Application(Baosteel) Research Institute, Baoshan Iron & Steel Co., Ltd., Shanghai 200126, China
  • Received:2021-11-13 Revised:2022-01-20 Online:2022-03-25 Published:2022-04-22

Abstract: Taking B1800HS series prototype hot-formed steel as an example, the reliability of thermodynamic data calculated by JMatPro software was investigated. The austenitizing temperature, minimum critical cooling rate and phase transformation temperature range were obtained from the calculated TTT curves of the steels, and compared with that of experimental CCT curves measured by thermal dilatometer. The effects of Mo and V on microstructure and properties of the steel were studied. The results show that the austenitizing temperature and critical cooling rate calculated by JMatPro software are in good agreement with the experimental results, and the predicted range of microstructure transformation temperature has a slight deviation, indicating that the JMatPro software can provide guidance for the formulation of heat treatment scheme of the B1800HS series hot-formed steels. In addition, through the performance test, it is confirmed that molybdenum vanadium multi-microalloying can make the tested steels have more excellent comprehensive service performance.

Key words: hot-formed steel, JMatPro software, thermal analysis, CCT curve

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