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Interface Structure and Wear Behavior of Cr26 Ferrous Matrix Surface Composites Reinforced with CTCP

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Abstract

Using cast tungsten carbide particles (CTCP) and reduced iron powders as raw materials, the porous ceramic preforms with honeycomb, strip, and layer structure, respectively, were prepared by loose sintering process; then, the CTCP/Cr26 ferrous matrix composites were fabricated by casting infiltration process. The microstructure of the composites was analyzed by SEM, XRD, and EDS. The results show that a sintered shell forms as a result of the reaction of Fe and W2C in the CTCP during loose sintering process; the inner part of the shell around the CTCp consists of WC and Fe3W3C phases, while the outer part between the particles is dominated by Fe3W3C. Therefore, the strength of preforms is enhanced because the particles are connected with each other by sintered shell. During casting infiltration process, a transition layer constituted by WC and Fe3W3C formed at the interface of CTCp and the matrix due to the dissolution and precipitation of the sintered shell in the high-temperature liquid iron. The three-body abrasive wear behavior of the composites was investigated. The result shows the wear resistance of honeycomb structure composite is comparable to that of whole layer (WL) structure composite, which is three times of heat-treated Cr26. However, the honeycomb structure composite has higher performance/cost ratio owing to the lower CTCp volume fraction and higher strength and toughness compared with the WL structure composite.

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Acknowledgments

This work was supported by the Natural Science Foundation of Shaanxi Province of China (No. 2013JQ6009), the Fundamental Research Funds for the Central Universities of China, the 863 project in China (No. 2013AA031203), the Special Funds for Strategic Emerging Industries Core Technology Research of Guangdong Province in China (No. 2012A090100018), the Scientific Research Program Funded by Shaanxi Provincial Education Department (No. 2013JK0919), and the Research Foundation of Xi’an University of Science and Technology (No.2013QDJ026, 2012QDJ034, 201202).

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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, 28 Xianning West Road, Xi’an, 710049, Shaanxi Province, People’s Republic of China

    Kaihong Zheng, Yimin Gao, Shuli Tang, Yefei Li & Shengqiang Ma

  2. Research Institute of Metal Processing and Formation Technology, Guangzhou Research Institute of Non-ferrous Metals, Guangzhou, 510650, People’s Republic of China

    Kaihong Zheng

  3. School of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an, 710054, People’s Republic of China

    Dawei Yi & Zhiyun Zhang

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  1. Kaihong Zheng
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  2. Yimin Gao
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  3. Shuli Tang
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  4. Yefei Li
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Correspondence to Yefei Li.

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Zheng, K., Gao, Y., Tang, S. et al. Interface Structure and Wear Behavior of Cr26 Ferrous Matrix Surface Composites Reinforced with CTCP . Tribol Lett 54, 15–23 (2014). https://doi.org/10.1007/s11249-014-0303-6

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  • DOI: https://doi.org/10.1007/s11249-014-0303-6

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