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Effects of quenching and partitioning process on mechanical properties of TRIP780 steel

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Abstract

A transformation-induced plasticity (TRIP) steel was applied to test its mechanical properties in quenching and partitioning (Q&P) process. A series of Q&P experiments followed by tensile tests, Charpy impact tests, fracture morphology analyses and microstructure observations were conducted. The experimental results showed that the Q&P treatment could increase the mechanical properties of TRIP steel evidently. The strength of tested TRIP780 after Q&P process reaches more than 1500 MPa with elongation of 17.8%, which is obviously greater than that of 22MnB5 after hot stamping. The microstructure observations indicate that the good combination of high strength and plasticity of TRIP steel after Q&P process is attributed to the multi-phase microstructure of hard martensite matrix and soft retained austenite.

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Acknowledgements

The authors would like to acknowledge the support by the National Natural Science Foundation of China under grant Nos. 51775336, U1564203, and Shanghai Pujiang Program under Grant No. 17PJD019.

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Authors and Affiliations

  1. National Engineering Research Center of Die and Mold CAD, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200030, China

    Xian-hong Han, Cheng-long Wang & Yuan-yuan Li

  2. Shanghai Marine Equipment Research Institute, Shanghai, 200031, China

    Gang Liu

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  1. Xian-hong Han
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  2. Cheng-long Wang
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  3. Yuan-yuan Li
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  4. Gang Liu
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Correspondence to Xian-hong Han.

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Han, Xh., Wang, Cl., Li, Yy. et al. Effects of quenching and partitioning process on mechanical properties of TRIP780 steel. J. Iron Steel Res. Int. 26, 991–999 (2019). https://doi.org/10.1007/s42243-018-0183-3

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  • DOI: https://doi.org/10.1007/s42243-018-0183-3

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