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Microstructure and Mechanical Properties of a Wear-Resistant As-Cast Alloyed Bainite Ductile Iron

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

An as-cast bainite ductile iron with excellent mechanical properties and wear resistance was fabricated by alloying and centrifugal casting method, and the alloyed chemical composition was optimized by using the thermodynamic software Thermo-Calc. By using optical microscopy, transmission electron microscopy, scanning electron microscopy, and X-ray diffraction, the microstructure of the as-fabricated bainite ductile cast iron was characterized pertinent to the elements distribution in matrix and features of ferrite and retained austenite. The results of mechanical properties test show that the hardness and compressive strength of this alloyed ductile iron are 52 HRC and 2,200 MPa, respectively. The as-cast bainite ductile iron possesses highly abrasive wear resistance and the reason can be ascribed to the solid solution of the elements Si, Ni, Cu, and Mn in the austenite and the formation of carbides of elements Cr and Mo. The strength of bainite ductile iron is increased by the acicular bainitic ferrite in the matrix.

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Acknowledgments

This work was financially supported by the National High Technology Research and Development Program (No. 2012AA03A508) and the National Natural Science Foundation of China (No. 51271051).

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Authors and Affiliations

  1. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, China

    Junjun Cui, Hongyun Zhang & Liqing Chen

  2. College of Mechanical and Vehicle Engineering, Shenyang Institute of Technology, Fushun, 113122, China

    Junjun Cui

  3. Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang, 110819, China

    Haizhi Li & Weiping Tong

Authors
  1. Junjun Cui
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  2. Hongyun Zhang
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  3. Liqing Chen
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  4. Haizhi Li
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Correspondence to Liqing Chen.

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Available online at http://link.springer.com/journal/40195

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Cui, J., Zhang, H., Chen, L. et al. Microstructure and Mechanical Properties of a Wear-Resistant As-Cast Alloyed Bainite Ductile Iron. Acta Metall. Sin. (Engl. Lett.) 27, 476–482 (2014). https://doi.org/10.1007/s40195-014-0067-x

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  • DOI: https://doi.org/10.1007/s40195-014-0067-x

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