Experimental investigation on wear behaviors of TBM disc cutter ring with different cooling methods

Fu, Jie; Zeng, Guiying; Zhang, Hao; Zhang, Ling; Yin, Xuanwei; Xia, Yimin

doi:10.1016/j.engfailanal.2022.106076

Cited by 20 publications

(3 citation statements)

References 14 publications

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“…The influencing factors on wear mechanisms included hardness, structure composition, carbide, roughness, etc. [27][28][29][30][31]. Among them, the quantity, the morphology, and the distribution of carbides could have a significant impact on the wear resistance [32].…”

Section: Discussionmentioning

confidence: 99%

Effect of N on the Microstructure and Wear Resistance of 4Cr13 Corrosion-Resistant Plastic Mold Steel

Fan,

Zhou,

et al. 2024

Materials

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The effect of N content on the microstructure and wear resistance of 4Cr13 corrosion-resistant plastic mold steel were investigated by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and tribometer. The results showed that the influence mechanism of nitrogen on the hardness of the test steels responded to the changes in the quenching temperature. When the quenching temperature was below 1050 °C, the solid solution strengthening of N played a dominant role as a wear mechanism, and as the N content increased, the hardness of the steel increased. When the quenching temperature was higher than 1050 °C, N increased the residual austenite content, resulting in a decrease in hardness. The addition of N reduced the optimal quenching temperature of the test steels. The N addition promoted the transformation of large-sized M23C6 to M23C6 and fine Cr2N, resulting in an increase in the hardness of the test steels. The influence on the wear resistance of the experimental steels differed according to the varied N contents. The addition of 0.1% N delayed the precipitation of large- sized particles in the second phase, increased the hardness of the steel, and reduced the degree of wear. However, an excessive addition of N (0.18%) led to the excessive precipitation of the second-phase particles, and the second-phase particles then gradually flaked during the wear process and continued to participate in the wear process as third-body abrasives, reducing wear resistance.

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Section: Discussionmentioning

confidence: 99%

Effect of N on the Microstructure and Wear Resistance of 4Cr13 Corrosion-Resistant Plastic Mold Steel

Fan,

Zhou,

et al. 2024

Materials

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“…Full-scale LCM tests have been widely used to predict TBM cutter performance 7 – 13 . Several LCM rock breaking experiments have also been conducted at Central South University 14 – 16 to help describe load variations as a CCS disc cutter breaks the rock mass and establish functional relationships between cutter geometric parameters and force.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the specific energies of sinusoidal VCS cutter rings and CCS cutter rings in breaking rock-like materials based on the FEM

Zhao,

Zhu,

Zhang

et al. 2024

Sci Rep

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Disc cutters are essential for full-section hard-rock tunnel boring machines. The performance of these devices directly affects tunnel engineering costs and duration. This paper proposes a sinusoidal variable cross-section (VCS) cutter ring and design method and establishes a digital model. Rock-like materials are simulated with a finite element model, and the model validity is verified via rock simulation mechanics tests. A disc cutter rolling rock simulation model for a linear cutting machine is also established, and simulation tests are performed for single- and three-cutter rolling using sinusoidal VCSs and constant cross-section (CCS) cutter models, respectively. The stress and energy changes for the cutters and rock-like material damage area were compared via simulation, confirming that some sinusoidal VCS cutter rings do less work on rock-like materials and cause larger crushing areas under the same engineering parameters; therefore, these cutter rings have smaller specific energies. The sinusoidal VCS cutter ring performance is 7% greater than that of CCS on average under single-cutter simulation, and the intermediate cutter performance of the intermediate cutter is 9% greater than that of CCS on average under three-cutter simulation. Thus, sinusoidal VCS cutter rings offer improved rock damage performance, and further research and application of this technology will improve the working efficiency of tunnel boring machines.

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“…Cutting tool wear is the main factor restricting the e ciency of deep excavation. Reducing the cutting tool wear and improving the service life of cutting tools are crucial to improve the tunneling e ciency [2][3][4] .…”

Section: Introductionmentioning

confidence: 99%

Influence of confining pressure on rock fracture propagation under particle impact

Wang,

Li,

Niu

et al. 2023

Preprint

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Revealing the influence of confining pressure on the propagation and formation mechanism of rock cracks under particle impact is significant to deep rock excavation. In this study, we conducted laboratory testing and numerical simulations to analyze the stress and crack field evolution in rock under particle impact. The results demonstrate that after particles impact, a fracture zone and intergranular main crack propagation zone are formed in the rock. The shear stress and tensile stress caused by compressive stress are the main reasons for the formation of the fracture zone, while the formation of the intergranular main crack propagation zone is mainly due to tangential derived tensile stress. The confining pressure induces prestress between rock particles such that the derived tensile stress needs to overcome the initial compressive stress between the particles to form tensile fractures. And the increase in the confining pressure leads to increases in the proportion of shear cracks and friction effects between rock particles, resulting in an increase in energy consumption for the same number of cracks. From a macroscopic perspective, the confining pressure can effectively inhibit the generation of cracks.

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Experimental investigation on wear behaviors of TBM disc cutter ring with different cooling methods

Cited by 20 publications

References 14 publications

Effect of N on the Microstructure and Wear Resistance of 4Cr13 Corrosion-Resistant Plastic Mold Steel

Effect of N on the Microstructure and Wear Resistance of 4Cr13 Corrosion-Resistant Plastic Mold Steel

Comparison of the specific energies of sinusoidal VCS cutter rings and CCS cutter rings in breaking rock-like materials based on the FEM

Influence of confining pressure on rock fracture propagation under particle impact

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