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Effects of Chromium Addition on Microstructure and Abrasion Resistance of Fe–B Cast Alloy

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Abstract

This research work studies the effects of chromium on microstructure and abrasion resistance of Fe–B cast alloy. The results show that eutectic boride changes from continuous network to less continuous and matrix changes from pearlite to martensite with the increase in chromium content in the alloy. Meanwhile, an increase in chromium addition in the alloy leads to an increase in the chromium content in M2B-type boride because chromium can enter boride by substituting for iron in Fe2B. Under two-body wear, Fe–B cast alloy exhibits excellent wear resistance. When alloys are tested against soft abrasive, chromium can markedly improve the wear resistance of Fe–B cast alloy, whereas excessive chromium can reduce the wear resistance. The wear resistance of Fe–B cast alloy increases first and then decreases with the increase in chromium. But when tested against hard abrasive, since the hardness of SiC is much higher than that of M2B boride, an increase in chromium content marginally increases the wear resistance. Weight losses of Fe–B cast alloy increase with the increase in the load and exhibit the linear relationship.

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Acknowledgments

The authors would like to thank the financial support for this work from the National High-Tech R&D Program under Grant No. 2007AA03Z510, P.R. China.

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Authors and Affiliations

  1. State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi Province, 710049, People’s Republic of China

    Jianjun Zhang, Yimin Gao, Jiandong Xing, Shengqiang Ma, Dawei Yi & Jingbo Yan

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  1. Jianjun Zhang
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  2. Yimin Gao
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  3. Jiandong Xing
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  4. Shengqiang Ma
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Correspondence to Jianjun Zhang or Yimin Gao.

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Zhang, J., Gao, Y., Xing, J. et al. Effects of Chromium Addition on Microstructure and Abrasion Resistance of Fe–B Cast Alloy. Tribol Lett 44, 31–39 (2011). https://doi.org/10.1007/s11249-011-9823-5

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  • DOI: https://doi.org/10.1007/s11249-011-9823-5

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