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Tribology Letters

, Volume 54, Issue 1, pp 15–23 | Cite as

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

  • Kaihong Zheng
  • Yimin Gao
  • Shuli Tang
  • Yefei LiEmail author
  • Shengqiang Ma
  • Dawei Yi
  • Zhiyun Zhang
Original Paper

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.

Keywords

Composite Cast tungsten carbide particles Wear behavior Casting infiltration process 

Notes

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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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Kaihong Zheng
    • 1
    • 2
  • Yimin Gao
    • 1
  • Shuli Tang
    • 1
  • Yefei Li
    • 1
    Email author
  • Shengqiang Ma
    • 1
  • Dawei Yi
    • 3
  • Zhiyun Zhang
    • 3
  1. 1.State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and EngineeringXi’an Jiaotong UniversityXi’anPeople’s Republic of China
  2. 2.Research Institute of Metal Processing and Formation TechnologyGuangzhou Research Institute of Non-ferrous MetalsGuangzhouPeople’s Republic of China
  3. 3.School of Materials Science and EngineeringXi’an University of Science and TechnologyXi’anPeople’s Republic of China

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