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The Effects of Cr2O3 on the Melting, Viscosity, Heat Transfer, and Crystallization Behaviors of Mold Flux Used for the Casting of Cr-Bearing Alloy Steels

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Abstract

An investigation was conducted to study the effects of Cr2O3 on the melting, viscosity, heat transfer, and crystallization behaviors of mold flux used for casting high-carbon-chromium steel (Cr12MoV) by using single/double hot thermal-couple technology (SHTT/DHTT), rotary viscosity, and infrared emitter technique (IET). The results showed that both the melting temperature and viscosity increased significantly with the addition of Cr2O3 content, while the general heat transfer rate was reduced with the increase of Cr2O3 due to the decrease of liquid layer and the reduction of radiative heat transfer. Meanwhile, results of IET and DHTT tests indicated that Cr2O3 would inhibit crystallization of mold flux. The results of this study can elucidate the effects of Cr2O3 on the properties of mold flux and provide guidelines for the new mold flux design for the casting of Cr-bearing alloy steels.

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Acknowledgments

The financial supports from NSFC (51274244, 51322405) and Hunan Excellent Young Scholar Funding (14JJ1005) are greatly acknowledged.

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Authors and Affiliations

  1. School of Metallurgy and Environment, Central South University, Changsha, 410083, Hunan, P.R. China

    Chao Xu (Graduate Student), Wanlin Wang (Professor), Lejun Zhou (Post Doctor) & Senlin Xie (Doctor Student)

  2. Steelmaking Research Department, Research Institute, Baosteel Group Corporation, Shanghai, 201900, P.R. China

    Chen Zhang (Senior Engineer)

Authors
  1. Chao Xu
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  2. Wanlin Wang
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  3. Lejun Zhou
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  4. Senlin Xie
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  5. Chen Zhang
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Corresponding author

Correspondence to Wanlin Wang.

Additional information

Manuscript submitted August 21, 2014.

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Xu, C., Wang, W., Zhou, L. et al. The Effects of Cr2O3 on the Melting, Viscosity, Heat Transfer, and Crystallization Behaviors of Mold Flux Used for the Casting of Cr-Bearing Alloy Steels. Metall Mater Trans B 46, 882–892 (2015). https://doi.org/10.1007/s11663-014-0258-x

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