Study on Diffusion Wear Mechanism of Ni, Fe and Cr Atoms in Cutting Nickel-based Superalloys in WC-Co Cemented Carbide Cutting Tools and Its Influence on Tools Properties
FAN Yihang, LI Zhengyi, HAO Zhaopeng*
School of Mechanical and Electrical Engingeering, Changchun University of Technology, Changchun 130012, China
Abstract: In the process of cutting nickel-based superalloy, the influence of Ni, Fe and Cr atoms diffusing into WC-Co cemented carbide cutting tools was studied by first principles calculation. The binding energy, lattice distortion, electronic properties, diffusion transition state, diffusion coefficient and mechanical properties were analyzed. The results show that the binding energy of atoms at different interstitial positions is negative, and the lattice distortion caused by octahedral interstitial spaces is lower. Ni, Fe, Cr atoms can enhance the gold properties of tungsten carbide WC-Co, but do not conducive to bonding between atoms, so the mechanical stability of the cutting decreases; the diffusion barriers of the three kinds of atoms are 0.82, 0.79 and 1.17 eV respectively, and the relationship of diffusion coefficients is DFe＞DNi ＞DCr. The experimental result shows that element diffusion leads to the deterioration of cutting performance and the abrasive wear of the tool.
范依航, 李政译, 郝兆朋. 切削镍基高温合金Ni、Fe、Cr原子在WC-Co硬质合金刀具中的扩散机制及对刀具性能的影响[J]. 材料导报, 2024, 38(23): 23070211-9.
FAN Yihang, LI Zhengyi, HAO Zhaopeng. Study on Diffusion Wear Mechanism of Ni, Fe and Cr Atoms in Cutting Nickel-based Superalloys in WC-Co Cemented Carbide Cutting Tools and Its Influence on Tools Properties. Materials Reports, 2024, 38(23): 23070211-9.
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2024, Vol. 38 
