The Preparation of H13 Steel for TBM Cutter and the Performance Test Close to Working Condition

Hu, Yong; Tian, Jiyu; Xu, Mingxu; Zhao, Hongwei; Wang, Mingze; Wang, Maosen; Zhang, Aiwu

doi:10.3390/app8101877

Cited by 16 publications

(6 citation statements)

References 18 publications

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“…With tempering at 350 • C, the martensite is transformed into a tempered troostite with a strip shape, and granular carbides gradually precipitate and grow (Figure 12c). The presence of troostite is believed to be beneficial to improving the elastic limit, yield limit and toughness of steel [44]. According to the test results, the tempered troostite phase presents a more positive influence on the fretting wear properties of quenched 25CrNi2MoVE steel, and both the K v value and CoF are at the lowest level of the series tempering temperature.…”

Section: Temperedmentioning

confidence: 97%

Effects of Microstructure Evolution on Fretting Wear Behaviors of 25CrNi2MoVE Steel under Different Tempering States

Lai

et al. 2020

Metals

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Increasing load requirements and harsh operating conditions have worsened the wear of drive shafts in special field vehicles. In this paper, the evolution of the microstructure and fretting wear behaviors of 25CrNi2MoVE torsion shaft steel and their influence on the wear mechanisms were investigated as a function of tempering temperature. The results showed that the coarse grain size, low matrix hardness and non-metallic inclusions in the as-received state lead to a high wear rate and serious adhesive wear. The grain refinement after normalizing and the formed M 5 C 2 carbide and bainite helped to improve the wear resistance and worn surface quality. Low temperature tempering is conducive to further improve the wear resistance of normalized samples, and the wear rate and worn surface roughness are increased gradually after tempering temperature increases. For quenching, although martensite structure can achieve a lower wear rate, the coefficient of friction is much higher; the wear mechanisms are primarily fatigue wear and adhesive wear. Although the adhesive wear degree and worn surface roughness were increased, the optimal anti-wear performances are obtained under tempering at 350 • C with good continuity of the surface oxide film. Excessive tempering temperature will make the softened matrix unable to form a beneficial "third-body wear".

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Section: Temperedmentioning

confidence: 97%

Effects of Microstructure Evolution on Fretting Wear Behaviors of 25CrNi2MoVE Steel under Different Tempering States

Lai

et al. 2020

Metals

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“…It is primarily responsible for the cutting action and wears out during mining. The cutter ring is usually made of hot-work tool steel, which is characterized by high strength and toughness with high hardness and wear resistance [29][30][31]. The other components of the disc cutter already mentioned are necessary for its proper function.…”

Section: Components and Design Of Disc Cuttersmentioning

confidence: 99%

“…Due to its favorable mechanical properties, hot-work tool steel is often used for the production of disc cutter rings [4,11,27,[29][30][31]. This steel grade has high hardness, toughness, and abrasion resistance and is therefore well suited to the demanding geological and geotechnical conditions of mechanized rock mining.…”

Section: Materials Selection and Heat Treatmentmentioning

confidence: 99%

Investigation of Disc Cutter Wear in Tunnel-Boring Machines (TBMs): Integration of Photogrammetry, Measurement with a Caliper, Weighing, and Macroscopic Visual Inspection

Janc,

Vižintin,

Pal

2024

Applied Sciences

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During the construction of tunnels using tunnel-boring machines (TBMs), the wear of disc cutters is an unavoidable process. The timely replacement of worn disc cutters can have a positive effect on construction time and therefore on costs. The wear of disc cutters can be assessed using various measurement methods. The aim of this article is to show different methods of measuring and evaluating the wear of disc cutters and to present their main advantages and disadvantages. In this study, four different wear-measuring methods were used and applied to a worn double disc cutter: a macroscopic visual inspection, profile measurement with a caliper, weighing, and close-range photogrammetry. The results of the measurements showed that the worn disc cutter was subject to normal abrasive wear, with local steel chipping occurring. Based on the close-range photogrammetry measurements, a profile of the worn disc cutter was also created and compared with the original profile. It was found that the best results for the wear assessment of a disc cutter can be achieved by using several measurement methods simultaneously. The integration of different measurement and evaluation methods is therefore recommended for a comprehensive understanding of disc cutter wear.

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“…The chemical composition of the H13 steel is shown in table 1. H13 steel was heat treated [1] and then cut into the required sample sizes by the WEDM machine before the tests. Figure 1 shows the microstructure of the steel after metallographic preparation.…”

Section: Experimental Setup 21 Materialsmentioning

confidence: 99%

“…TBM is an internationally advanced tunnel construction machine. It relies on the strong thrust and shearing force to break the rock, and thus achieving tunnel construction [1][2][3]. The tunnel construction using TBMs has little disturbance to surrounding rock and smooth excavation ground, which can effectively reduce the occurrence of geological disasters, and achieve continuous and fast construction.…”

Section: Introductionmentioning

confidence: 99%

Wear performance and mechanisms of H13 steels sliding against different Rock types

Tian¹,

Hu²,

Liu³

et al. 2020

Surf. Topogr.: Metrol. Prop.

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Disc cutters are the main working tools of full-face hard rock tunnel boring machine (TBM). They are in direct contact with rocks, sustaining enormous loads and vibrations in practical constructions. Therefore, The wear of the disc cutters is very severe and would cause huge economic costs. In this study, the abrasive wear performance of disc cutters' material (H13 steel) was analyzed by pin-on-disc wear tests in contact with three types of rocks (sandstone, granite and gneiss) under different loads (100 N and 200 N). The friction coefficient was recorded during the tests. The wear rate of H13 steel and maximum wear depth of rocks were calculated and measured. The worn surfaces of H13 steel were observed. Results showed that the friction coefficient, the wear rate of H13 steel and the maximum wear depth of rocks under the load of 100 N was lower than those of 200 N. The main wear mechanism of H13 steel in contact with sandstone was three-body wear, while the main wear mechanism of H13 steel in contact with high-strength rocks (granite and gneiss) was abrasive wear. The study of wear performance and mechanisms of H13 steels sliding against different rock types would provide theoretical supports for the construction of TBM under various geological conditions.

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The Preparation of H13 Steel for TBM Cutter and the Performance Test Close to Working Condition

Cited by 16 publications

References 18 publications

Effects of Microstructure Evolution on Fretting Wear Behaviors of 25CrNi2MoVE Steel under Different Tempering States

Effects of Microstructure Evolution on Fretting Wear Behaviors of 25CrNi2MoVE Steel under Different Tempering States

Investigation of Disc Cutter Wear in Tunnel-Boring Machines (TBMs): Integration of Photogrammetry, Measurement with a Caliper, Weighing, and Macroscopic Visual Inspection

Wear performance and mechanisms of H13 steels sliding against different Rock types

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