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Effects of Destabilization Temperature on the Microstructure and Mechanical Properties of High Chromium Cast Iron

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Abstract

The effect of destabilization temperature on the microstructure and impact toughness of high chromium cast iron was investigated. The result showed that the microhardness of matrix decreased from 860 to 332 HV with the increase of destabilization temperature from 950 to 1100 °C. The impact toughness of the alloy increased from 5.3 to 8.1 J/cm2 with the increase of destabilization temperature from 950 to 1050 °C, while it decreased with further increase of destabilization temperature. The former change of impact toughness was found to be due to the increase in volume fraction of retained austenite from 12.6 to 56.5%, whereas the latter was attributed to the increase of carbon content in retained austenite by analysis of fracture morphologies. The wear resistance decreased with the increase of destabilized temperature from 950 to 1050 °C and increased only slightly for the temperature from 1050 to 1100 °C.

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Acknowledgment

This work is financially supported by the Innovation Foundation of Central South University (No. 2016zzts028).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Central South University, Changsha, 410083, People’s Republic of China

    J. P. Lai, Q. L. Pan, H. R. Cui & X. D. Wang

  2. Powder Metallurgy Research Institute, Central South University, Changsha, 410083, People’s Republic of China

    Z. B. Wang

  3. Chang Gao Advanced Materials Co., Ltd, Changsha, 410083, People’s Republic of China

    Z. Z. Gao

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  1. J. P. Lai
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  2. Q. L. Pan
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Correspondence to Q. L. Pan.

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Lai, J.P., Pan, Q.L., Wang, Z.B. et al. Effects of Destabilization Temperature on the Microstructure and Mechanical Properties of High Chromium Cast Iron. J. of Materi Eng and Perform 26, 4667–4675 (2017). https://doi.org/10.1007/s11665-017-2943-9

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  • DOI: https://doi.org/10.1007/s11665-017-2943-9

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