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| Effect of heat treatments on Charpy impact properties of 15Cr12MoVWN ferritic/martensitic steel |
| Ting-wei Ma1,2, Xian-chao Hao3, Ping Wang1 |
1 Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, Liaoning, China
2 Yingkou Institute of Technology, Yingkou 115014, Liaoning, China
3 CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China |
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Abstract The Charpy impact properties of 15Cr12MoVWN ferritic/martensitic steel for sodium-cooled reactors with variation in heat treatment factors and parameters are reported. The results show that the ductile-to-brittle transition temperature (DBTT) increased and the upper shelf energy (USE) decreased with increase in normalizing temperature. However, the variation tendency of DBTT and USE was the opposite with increase in tempering temperature. The tempering temperature showed a greater influence on USE than the normalizing temperature, and normalizing and tempering temperatures had the equally significant effects on DBTT, but the cooling method was not a significant factor for DBTT and USE. The prior austenite grain and M23C6 size were the main influences on DBTT, and the dislocation density was the main factor affecting the variation of USE. The heat-treatment regime recommended for 15Cr12MoVWN steel was composed of normalizing at 1000–1050 °C for 0.5 h followed by water quenching or air cooling and tempering at 760 °C for 1.5 h.
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Received: 26 September 2020
Published: 25 March 2022
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| Cite this article: |
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Ting-wei Ma,Xian-chao Hao,Ping Wang. Effect of heat treatments on Charpy impact properties of 15Cr12MoVWN ferritic/martensitic steel[J]. Journal of Iron and Steel Research International, 2022, 29(3): 512-518.
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2022, Vol. 29 
