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| Effect of Mg addition on temper embrittlement in 2.25Cr–1Mo steel doped with 0.056% P–Mg segregation behavior at grain boundary |
| Xiao-bing Li1,2, Xin Dong1,3, Peng-xiang Zhao1,4, Wei-wei Xing1,2, Lei-lei Ding1,2, Nan-nan Zhang1,3, Ying-che Ma1,2, Kui Liu1,2 |
| 1 Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, Liaoning, China; 2 CAS Key Laboratory of Nuclear Materials and Safety Assessment, Shenyang 110014, Liaoning, China; 3 School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, Liaoning, China; 4 School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, Anhui, China |
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Abstract To verify the microalloying function and segregation behavior of trace Mg at grain boundary in steel, the 2.25Cr–1Mo steel doped with 0.056% P containing different Mg contents was refined with a vacuum-induction furnace. The effects of trace Mg addition on the temper embrittlement susceptibility of 2.25Cr–1Mo steel were studied by step-cooling test and the segregation behavior of Mg at grain boundary was explored by Auger electron spectroscopy. It is shown that P-induced temper embrittlement susceptibility can be reduced after subjecting to step-cooling treatment with trace Mg addition, mainly benefited from the segregation of Mg at grain boundary. This segregation can decrease the segregation amounts of P and S, especially for P, and increase the grain boundary cohesion, reducing the adverse effect on temper embrittlement caused by P and S.
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| Cite this article: |
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Xiao-bing Li,Xin Dong,Peng-xiang Zhao, et al. Effect of Mg addition on temper embrittlement in 2.25Cr–1Mo steel doped with 0.056% P–Mg segregation behavior at grain boundary[J]. Journal of Iron and Steel Research International, 2021, 28(10): 1259-1267.
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2021, Vol. 28 
