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Volume 39 Issue 4
Aug.  2021
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GU Jing-hong, XIAO Ping-an, XIAO Li-yang, LÜ Rong, GU Si-min, ZHAO Ji-kang. Microstructure and mechanical properties of TiC particle enhanced high chromium iron[J]. Powder Metallurgy Technology, 2021, 39(4): 319-325. DOI: 10.19591/j.cnki.cn11-1974/tf.2020080001
Citation: GU Jing-hong, XIAO Ping-an, XIAO Li-yang, LÜ Rong, GU Si-min, ZHAO Ji-kang. Microstructure and mechanical properties of TiC particle enhanced high chromium iron[J]. Powder Metallurgy Technology, 2021, 39(4): 319-325. DOI: 10.19591/j.cnki.cn11-1974/tf.2020080001
shu

Microstructure and mechanical properties of TiC particle enhanced high chromium iron

  • College of Materials Science and Engineering, Hunan University, Changsha 410080, China

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  • Corresponding author:

    XIAO Ping-an, E-mail: changcluj@163.com

  • Received Date: August 02, 2020
  • Available Online: July 19, 2021
    Graphical Abstract
    • Abstract
  • TiC particle (TiCP) reinforced-sintered high chromium cast iron (HCCI) composites containing 20% Cr by mass were prepared by powder metallurgy (PM) and super solid phase line liquid phase sintering (SLPS). The effect of TiC particle content (mass fraction) on the phase composition, microstructure, and mechanical properties of the TiCP/HCCI composites was systematically studied by means of optical microscope, scanning electron microscope (SEM), and X-ray diffraction (XRD). The subsequent heat treatment research was also carried out. The results show that, the relative density of the TiCP/HCCI composites prepared by SLPS is above 97%, and the phase composition is composed of martensite, austenite, M7C3 carbide, and TiC. The TiC particles mainly distribute along the interface between the metal matrix and carbide in HCCI. With the increase of TiC content, the hardness of the composites increases to HRC 67.2, while the impact toughness decreases gradually. The fracture mechanism of the composites changes from the quasi cleavage fracture to the inter-granular cleavage fracture. After the quenched treatment, the hardness of the TiCP/HCCI composites can be further increased to HRC 69.3, which are expected to be the excellent wear-resistant materials with the hardness between HCCI and cemented carbide.
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    • References (15)
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