Features of high-speed wear of WC-steel 11G13 material in contact with cast tool steel

Савченко, Н. Л.; Gnyusov, S. F.; Kulkov, S. N.

doi:10.3103/s1068366609010085

Cited by 16 publications

(9 citation statements)

References 8 publications

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“…The CoF values of all WC/Y-TZP-Al 2 O 3 hybrid ceramic-matrix composites with dispersed Hadfield steel particles obtained at sliding speed 37 m/s and contact pressure 5 MPa were lower than those of Y-TZP-20 wt.% Al 2 O 3 [11] and ZrB 2 -20 vol.% SiC [8] (Figure 20a). In particular, the CoF of the 65 W composite was at the level of that of WC-30 wt.% Hadfield steel MMC [10].…”

Section: Discussionmentioning

confidence: 93%

“…In our case, there is another factor facilitating the agglomeration because sinter-forging was carried out at 1350 °C , i.e., above the 1143 °C that is the WC-Fe eutectic point [37]. Therefore, some liquid phase sintering might have occurred when Hadfield steel preferentially interacted with the WC grains, and possibly partially infiltrated into the already formed WC grain agglomerates due to its better wettability of the WC [7,10,47] as compared to that of ZrO2 [48] or Al2O3 [49], i.e., of Y-TZP-Al2O3 components, which formed their own agglomerates outside of the regions occupied by WC-Hadfield steel cermet. From the viewpoint of its chemical composition, the TrZ looks like a transition from undeformed as-sintered base material to the TL.…”

Section: Structure Of As-sintered Composites Fracture Toughening Mech...mentioning

confidence: 86%

“…All of this allowed preparing the WC/Y-TZP-Al 2 O 3 hybrid ceramic-matrix composites with a unique structure combining regions structurally similar to the WC-Hadfield steel MMCs [10] with microcomposite eutectic Y-TZP-Al 2 O 3 core structures inside the micron-thickness spherical shells similar to those found in the source ceramic powders (Figure 1c-f).…”

Section: Discussionmentioning

confidence: 99%

“…High-speed sliding usually means unlubricated sliding at speeds in the range of 5-90 m/s and only a limited number of materials can be capable of sustaining that harsh condition [7][8][9][10][11][12][13][14][15][16][17][18][19]. Those may be hybrid sliding pairs with ceramics, ceramic matrix (CMCs), or metallic matrix (MMCs) composites rubbed against hardened alloyed steel counterbodies [7][8][9][10][11][12][13][14][15][16][17][18][19]. It is worthwhile noting that despite temperatures as high as 1500-3000 • C that the melted Hadfield steel.…”

Section: Introductionmentioning

confidence: 99%

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Self-Lubricating Effect of WC/Y–TZP–Al2O3 Hybrid Ceramic–Matrix Composites with Dispersed Hadfield Steel Particles during High-Speed Sliding against an HSS Disk

et al. 2022

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WC/Y–TZP–Al2O3 hybrid ceramic–matrix composites (CMCs) with dispersed Hadfield steel particles were sintered and then tested at sliding speeds in the range of 7–37 m/s and contact pressure 5 MPa. Fast and low-temperature sinter-forging allowed obtaining micron-sized WC grains, submicron-sized alumina-reinforced yttria partially stabilized polycrystalline tetragonal zirconia (Y–TZP–Al2O3), and evenly distributed Hadfield steel grains. Such a microstructure provided new hybrid characteristics combining high hardness with high fracture toughness and tribological adaptation. The CMCs demonstrated low friction and high wear resistance that were better than those demonstrated by other composite materials such as, for example, MAX-phase composites, zirconia-base ceramics, ZrB2-SiC ceramics, and metal matrix WC–(Fe–Mn–C) composites. These good tribological characteristics were obtained due to the in situ mechanochemical formation of iron tungstates FeWO4 and Fe2WO6 on the worn surfaces of composite samples. These mixed oxides were included in multilayer subsurface structures that provided the self-lubricating and self-healing effects in high-speed sliding because of their easy shear and quasi-viscous behavior.

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Section: Discussionmentioning

confidence: 93%

Section: Structure Of As-sintered Composites Fracture Toughening Mech...mentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Self-Lubricating Effect of WC/Y–TZP–Al2O3 Hybrid Ceramic–Matrix Composites with Dispersed Hadfield Steel Particles during High-Speed Sliding against an HSS Disk

et al. 2022

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“…2, изм. 5,6,11). В условиях сильного разогрева и интенсивной пластической деформации поверхности структурно-фазовое состояние подложки материала, на которой формируется этот трибослой, оказывается очень важным.…”

Section: значения нанотвердости эффективного модуля юнга и соотношени...unclassified

Elastoplastic properties of tribological layers of WC – (Fe – Mn – C) composites formed after high-speed sliding on steel

Савченко

Sevostyanova

Tarasov

2022

Izv. vysš. učebn. zaved., Čern. metall.

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In this work, the authors studied the elastoplastic properties of the formed tribological layers of WC – (Fe – Mn – C) composites with matrices consisting of γ-iron (containing 4 % Mn (WC – 80G20)) and γ + α′ (containing 20 % Mn (WC – 80G4)) after friction on a high-speed steel disk at contact pressure of 5 MPa and sliding speeds in the range from 10 to 37 m/s. It was established that the main factor determining the morphology of the worn surface is sliding speed. At sliding speeds of 10 and 20 m/s, finely dispersed mechanically mixed tribolayers 3 – 4 µm thick are formed. As the sliding speed increases to 30–37 m/s, the thickness of the tribolayers reaches 10 – 15 µm, and the structure consists of oxidized fragments of WC – (Fe – Mn – C) composites and FeWO4 complex oxide and does not have a sharp boundary, like the tribolayers formed at lower sliding speeds. The highest values of nanohardness (~33 GPa) and effective Young’s modulus (~523 GPa) were achieved in the WC – 80G4 tribolayer after friction at 10 m/s when the nanoindenter was embedded into agglomerates of fragmented WC grains. This contrasted with the properties of the tribolayers formed at sliding speeds above 20 m/s. The results of nanoindentation showed an obvious effect of tribochemically induced softening in the emerging tribolayer after high-speed sliding at a speed of 37 m/s. Such a layer had a composite microstructure consisting of fragmented composite components cemented in-situ by tribochemically formed FeWO4 and, in addition to antifriction properties, had an increased indentation fracture resistance.

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Adaptation and self-healing effect of tribo-oxidizing in high-speed sliding friction on ZrB2-SiС ceramic composite

Савченко

Mirovoy

Buyakov

et al. 2020

Wear

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Features of high-speed wear of WC-steel 11G13 material in contact with cast tool steel

Cited by 16 publications

References 8 publications

Self-Lubricating Effect of WC/Y–TZP–Al2O3 Hybrid Ceramic–Matrix Composites with Dispersed Hadfield Steel Particles during High-Speed Sliding against an HSS Disk

Self-Lubricating Effect of WC/Y–TZP–Al2O3 Hybrid Ceramic–Matrix Composites with Dispersed Hadfield Steel Particles during High-Speed Sliding against an HSS Disk

Elastoplastic properties of tribological layers of WC – (Fe – Mn – C) composites formed after high-speed sliding on steel

Adaptation and self-healing effect of tribo-oxidizing in high-speed sliding friction on ZrB2-SiС ceramic composite

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