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Wear of cemented tungsten carbide percussive drill–bit inserts: Laboratory and field study

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Wear of cemented tungsten carbide percussive drill–bit inserts : Laboratory and field study. / Tkalich, Dmitry; Li, Charlie C.; Kane, Alexandre; Saai, Afaf; Tkalich, Dmitry; Yastrebov, Vladislav A.; Hokka, Mikko; Kuokkala, Veli-Tapani; Bengtsson, Maria; From, Anna.

In: Wear, Vol. 386-387, 15.09.2017, p. 106-117.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Tkalich, D, Li, CC, Kane, A, Saai, A, Tkalich, D, Yastrebov, VA, Hokka, M, Kuokkala, V-T, Bengtsson, M & From, A 2017, 'Wear of cemented tungsten carbide percussive drill–bit inserts: Laboratory and field study', Wear, vol. 386-387, pp. 106-117. https://doi.org/10.1016/j.wear.2017.05.010

APA

Tkalich, D., Li, C. C., Kane, A., Saai, A., Tkalich, D., Yastrebov, V. A., ... From, A. (2017). Wear of cemented tungsten carbide percussive drill–bit inserts: Laboratory and field study. Wear, 386-387, 106-117. https://doi.org/10.1016/j.wear.2017.05.010

Vancouver

Tkalich D, Li CC, Kane A, Saai A, Tkalich D, Yastrebov VA et al. Wear of cemented tungsten carbide percussive drill–bit inserts: Laboratory and field study. Wear. 2017 Sep 15;386-387:106-117. https://doi.org/10.1016/j.wear.2017.05.010

Author

Tkalich, Dmitry ; Li, Charlie C. ; Kane, Alexandre ; Saai, Afaf ; Tkalich, Dmitry ; Yastrebov, Vladislav A. ; Hokka, Mikko ; Kuokkala, Veli-Tapani ; Bengtsson, Maria ; From, Anna. / Wear of cemented tungsten carbide percussive drill–bit inserts : Laboratory and field study. In: Wear. 2017 ; Vol. 386-387. pp. 106-117.

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@article{66f9143d890a4eb1913f7400b3efd576,
title = "Wear of cemented tungsten carbide percussive drill–bit inserts: Laboratory and field study",
abstract = "Design of the drill–bit and selection of the Cemented Tungsten Carbide (CC) grade for drill–bit inserts are crucial for efficient percussive drilling. This study presents the results of an experimental campaign executed with the aim to identify the distinctive wear mechanisms and behaviour of different CC grades. Three laboratory and one full–scale drilling tests were performed using nine CC grades with different binder contents, binder chemical compositions, mean tungsten carbide (WC) grain sizes, and grain size distributions. Wear traces found on the drill–bit inserts after the full–scale drilling test show noticeable differences depending on their position on the drill–bit. Tensile forces present on the leading edge of the inserts due to the sliding contact with rock are suspected to play a significant role. Laboratory tests performed include: (i) single impact tests using a modified Split Hopkinson Pressure Bar (SHPB) apparatus, (ii) Abrasion Value (AV) rotating disk tests, and (iii) impact abrasion (LCPC) tests. Volume loss and shape change were used as macroscopic measures of wear. Greater volume losses were found for the grades with nickel–based binders compared to those with pure cobalt binder. The use of a narrower WC grain size distribution leads to lesser volume loss in drilling and AV tests. Surface analysis of the damaged microstructure was performed using scanning electron microscope. Distinct meso–scale (few dozens of WC grain sizes) patterns of damaged microstructure zones surrounded by the intact surface were found on the surfaces of specimens after single impact test. The pattern indicates the potential influence of a non–uniform contact due to the rock roughness and internal rock heterogeneities, which is supported by the study of the rock crater roughness. Size of such zones could be seen as a certain length–scale, which determines the insert–rock contact behaviour. A specific “peeling” mechanism of material removal was observed in the full–scale drilling test, where portion of the CC microstructure fused with the rock tribofilm gets removed when that tribofilm peels off.",
keywords = "Cemented tungsten carbide, Contact area, Impact abrasion, Rotary–percussive drilling, Roughness, SEM, Sliding abrasion, Split Hopkinson pressure bar, Surface deterioration mechanisms, Volume loss, Wear",
author = "Dmitry Tkalich and Li, {Charlie C.} and Alexandre Kane and Afaf Saai and Dmitry Tkalich and Yastrebov, {Vladislav A.} and Mikko Hokka and Veli-Tapani Kuokkala and Maria Bengtsson and Anna From",
year = "2017",
month = "9",
day = "15",
doi = "10.1016/j.wear.2017.05.010",
language = "English",
volume = "386-387",
pages = "106--117",
journal = "Wear",
issn = "0043-1648",
publisher = "Elsevier",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Wear of cemented tungsten carbide percussive drill–bit inserts

T2 - Laboratory and field study

AU - Tkalich, Dmitry

AU - Li, Charlie C.

AU - Kane, Alexandre

AU - Saai, Afaf

AU - Tkalich, Dmitry

AU - Yastrebov, Vladislav A.

AU - Hokka, Mikko

AU - Kuokkala, Veli-Tapani

AU - Bengtsson, Maria

AU - From, Anna

PY - 2017/9/15

Y1 - 2017/9/15

N2 - Design of the drill–bit and selection of the Cemented Tungsten Carbide (CC) grade for drill–bit inserts are crucial for efficient percussive drilling. This study presents the results of an experimental campaign executed with the aim to identify the distinctive wear mechanisms and behaviour of different CC grades. Three laboratory and one full–scale drilling tests were performed using nine CC grades with different binder contents, binder chemical compositions, mean tungsten carbide (WC) grain sizes, and grain size distributions. Wear traces found on the drill–bit inserts after the full–scale drilling test show noticeable differences depending on their position on the drill–bit. Tensile forces present on the leading edge of the inserts due to the sliding contact with rock are suspected to play a significant role. Laboratory tests performed include: (i) single impact tests using a modified Split Hopkinson Pressure Bar (SHPB) apparatus, (ii) Abrasion Value (AV) rotating disk tests, and (iii) impact abrasion (LCPC) tests. Volume loss and shape change were used as macroscopic measures of wear. Greater volume losses were found for the grades with nickel–based binders compared to those with pure cobalt binder. The use of a narrower WC grain size distribution leads to lesser volume loss in drilling and AV tests. Surface analysis of the damaged microstructure was performed using scanning electron microscope. Distinct meso–scale (few dozens of WC grain sizes) patterns of damaged microstructure zones surrounded by the intact surface were found on the surfaces of specimens after single impact test. The pattern indicates the potential influence of a non–uniform contact due to the rock roughness and internal rock heterogeneities, which is supported by the study of the rock crater roughness. Size of such zones could be seen as a certain length–scale, which determines the insert–rock contact behaviour. A specific “peeling” mechanism of material removal was observed in the full–scale drilling test, where portion of the CC microstructure fused with the rock tribofilm gets removed when that tribofilm peels off.

AB - Design of the drill–bit and selection of the Cemented Tungsten Carbide (CC) grade for drill–bit inserts are crucial for efficient percussive drilling. This study presents the results of an experimental campaign executed with the aim to identify the distinctive wear mechanisms and behaviour of different CC grades. Three laboratory and one full–scale drilling tests were performed using nine CC grades with different binder contents, binder chemical compositions, mean tungsten carbide (WC) grain sizes, and grain size distributions. Wear traces found on the drill–bit inserts after the full–scale drilling test show noticeable differences depending on their position on the drill–bit. Tensile forces present on the leading edge of the inserts due to the sliding contact with rock are suspected to play a significant role. Laboratory tests performed include: (i) single impact tests using a modified Split Hopkinson Pressure Bar (SHPB) apparatus, (ii) Abrasion Value (AV) rotating disk tests, and (iii) impact abrasion (LCPC) tests. Volume loss and shape change were used as macroscopic measures of wear. Greater volume losses were found for the grades with nickel–based binders compared to those with pure cobalt binder. The use of a narrower WC grain size distribution leads to lesser volume loss in drilling and AV tests. Surface analysis of the damaged microstructure was performed using scanning electron microscope. Distinct meso–scale (few dozens of WC grain sizes) patterns of damaged microstructure zones surrounded by the intact surface were found on the surfaces of specimens after single impact test. The pattern indicates the potential influence of a non–uniform contact due to the rock roughness and internal rock heterogeneities, which is supported by the study of the rock crater roughness. Size of such zones could be seen as a certain length–scale, which determines the insert–rock contact behaviour. A specific “peeling” mechanism of material removal was observed in the full–scale drilling test, where portion of the CC microstructure fused with the rock tribofilm gets removed when that tribofilm peels off.

KW - Cemented tungsten carbide

KW - Contact area

KW - Impact abrasion

KW - Rotary–percussive drilling

KW - Roughness

KW - SEM

KW - Sliding abrasion

KW - Split Hopkinson pressure bar

KW - Surface deterioration mechanisms

KW - Volume loss

KW - Wear

U2 - 10.1016/j.wear.2017.05.010

DO - 10.1016/j.wear.2017.05.010

M3 - Article

VL - 386-387

SP - 106

EP - 117

JO - Wear

JF - Wear

SN - 0043-1648

ER -