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Beneficial Effect of Microalloyed Rare Earth on S Segregation in High-Purity Duplex Stainless Steel

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Abstract

S segregation at the α/γ interface remains in duplex stainless steel with only 10 ppm S. The interfacial brittle tearing appears during hot deformation due to S segregation. Minor rare earth additions can effectively eliminate the S contamination. In particular, RE enrichment at the α/γ interface indicating its microalloying effect is an important cause.

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The authors are grateful for the financial support by National Natural Science Foundation of China (Grant No. 51101136), Natural Science Foundation of Hebei province, China (Grant No. E2012203013), College science and technology research project of Hebei province, China (Grant No. QN2014107), and College innovation team leader training program of Hebei province, China (Grant No. LJRC012).

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Authors and Affiliations

  1. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao, 066004, P.R.China

    Lei Chen

  2. School of Mechanical Engineering, Yanshan University, Qinhuangdao, 066004, P.R.China

    Xiaocong Ma, Miao Jin, Jianfeng Wang, Hongjun Long & Tianqiao Mao

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  1. Lei Chen
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  2. Xiaocong Ma
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  3. Miao Jin
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  4. Jianfeng Wang
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Correspondence to Lei Chen.

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Manuscript submitted March 21, 2015.

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Chen, L., Ma, X., Jin, M. et al. Beneficial Effect of Microalloyed Rare Earth on S Segregation in High-Purity Duplex Stainless Steel. Metall Mater Trans A 47, 33–38 (2016). https://doi.org/10.1007/s11661-015-3245-1

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