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Microstructure and Mechanical Properties of c-BN Reinforced (Ti,W)C-Based Cermet Tool Materials

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Abstract

(Ti,W)C-based cement tool materials with c-BN particles as additive phase are fabricated by the hot press sintering. The effect of c-BN addition on the microstructure and mechanical properties of (Ti,W)C-based cement tool materials are investigated. With the addition of c-BN, the fracture mode of composite transform from intergranular to transgranular fracture. The main toughening mechanism is particle bridging, crack deflection and crack bifurcation, which improve the fracture toughness of cement tool material. The proper addition of c-BN can improve the mechanical properties of the composites. When the content of c-BN is 1.5 wt %, (Ti,W)C-based cement tool materials reaches the optimum comprehensive mechanical properties. The hardness, the flexural strength and the fracture toughness is 19.78 GPa, 987 MPa and 9.44 MPa m1/2, respectively.

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Funding

This work was supported by National Natural Science Foundation of China (projects no. 51675289 and 52075275), Agricultural Key Applied Project of China (no. SD2019NJ015) and Project for the Innovation Team of Universities and Institutes in Jinan of China (no. 2018GXRC005).

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Authors and Affiliations

  1. School of Mechanical and Automotive Engineering, Qilu University of Technology (Shandong Academy of Sciences), 250353, Jinan, China

    Bin Fang, Zhonghang Yuan, Liying Gao, Depeng Li & Yuanbin Zhang

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  1. Bin Fang
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  2. Zhonghang Yuan
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  3. Liying Gao
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  4. Depeng Li
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  5. Yuanbin Zhang
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Contributions

Bin Fang: methodology, conceptualization, writing (review and editing), data curation, and general supervision. Zhonghang Yuan: writing (original draft). Depeng Li: resources, writing (review and editing), and data curation. Yuanbin Zhang: writing (editing).

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Correspondence to Bin Fang.

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Bin Fang, Yuan, Z., Gao, L. et al. Microstructure and Mechanical Properties of c-BN Reinforced (Ti,W)C-Based Cermet Tool Materials. J. Superhard Mater. 43, 415–422 (2021). https://doi.org/10.3103/S1063457621060046

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