Critical Damage Analysis of WC-Co Tip of Conical Pick due to Coal Excavation in Mines
WC-Co based tools are widely used in the field of coal and rock excavation because of their unique combination of strength, hardness, and resistance to abrasive wear. Conical pick is one of the coal cutting tools. The tip of the pick is made of WC-Co material. As coal and rock are heterogeneous elem...
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Wiley
2015-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2015/292046 |
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| author | Saurabh Dewangan Somnath Chattopadhyaya Sergej Hloch |
| author_facet | Saurabh Dewangan Somnath Chattopadhyaya Sergej Hloch |
| author_sort | Saurabh Dewangan |
| collection | DOAJ |
| description | WC-Co based tools are widely used in the field of coal and rock excavation because of their unique combination of strength, hardness, and resistance to abrasive wear. Conical pick is one of the coal cutting tools. The tip of the pick is made of WC-Co material. As coal and rock are heterogeneous elements, they pose various constraints during excavation. As a result the tools wear out during the process. Other parameters like cutting techniques, tool orientation, and environmental conditions also affect the tool significantly. The wearing phenomenon greatly reduces the service life of the tools and thereby cuts down the production rate. To prevent such wearing process, it is important to investigate the different wear mechanisms in WC-Co. Simultaneously, there has to be an ongoing endeavour for the development of better quality WC-Co. This paper focuses on different wear mechanisms in a conical pick which has been used in a continuous miner machine for coal cutting. The worn out surface has been observed by using FE-SEM (field emission scanning electron microscopy) and EDS (energy dispersive X-ray spectroscopy). The mechanisms, namely, coal/rock intermixing, cracking and crushing of WC grains, and adhesion of rock particles, have been predominantly investigated in this study. A little indication of corrosive decay in the WC grain has also been reported. The EDS has detected material concentration in a selected area or point of the worn-out surface. The spectrograph confirms the presence of coal/rock materials. Elements such as W, C, Ca, K, O, and Co have been mainly found in different concentrations at different positions. |
| format | Article |
| id | doaj-art-07d8ab577e0348bb9bed47975921f423 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
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| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-07d8ab577e0348bb9bed47975921f4232025-08-20T03:55:28ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422015-01-01201510.1155/2015/292046292046Critical Damage Analysis of WC-Co Tip of Conical Pick due to Coal Excavation in MinesSaurabh Dewangan0Somnath Chattopadhyaya1Sergej Hloch2Department of Mechanical Engineering, Indian School of Mines, Dhanbad 826004, IndiaDepartment of Mechanical Engineering, Indian School of Mines, Dhanbad 826004, IndiaFaculty of Manufacturing Technologies, Technical University of Košice with a Seat in Prešov, 080 01 Presov, SlovakiaWC-Co based tools are widely used in the field of coal and rock excavation because of their unique combination of strength, hardness, and resistance to abrasive wear. Conical pick is one of the coal cutting tools. The tip of the pick is made of WC-Co material. As coal and rock are heterogeneous elements, they pose various constraints during excavation. As a result the tools wear out during the process. Other parameters like cutting techniques, tool orientation, and environmental conditions also affect the tool significantly. The wearing phenomenon greatly reduces the service life of the tools and thereby cuts down the production rate. To prevent such wearing process, it is important to investigate the different wear mechanisms in WC-Co. Simultaneously, there has to be an ongoing endeavour for the development of better quality WC-Co. This paper focuses on different wear mechanisms in a conical pick which has been used in a continuous miner machine for coal cutting. The worn out surface has been observed by using FE-SEM (field emission scanning electron microscopy) and EDS (energy dispersive X-ray spectroscopy). The mechanisms, namely, coal/rock intermixing, cracking and crushing of WC grains, and adhesion of rock particles, have been predominantly investigated in this study. A little indication of corrosive decay in the WC grain has also been reported. The EDS has detected material concentration in a selected area or point of the worn-out surface. The spectrograph confirms the presence of coal/rock materials. Elements such as W, C, Ca, K, O, and Co have been mainly found in different concentrations at different positions.http://dx.doi.org/10.1155/2015/292046 |
| spellingShingle | Saurabh Dewangan Somnath Chattopadhyaya Sergej Hloch Critical Damage Analysis of WC-Co Tip of Conical Pick due to Coal Excavation in Mines Advances in Materials Science and Engineering |
| title | Critical Damage Analysis of WC-Co Tip of Conical Pick due to Coal Excavation in Mines |
| title_full | Critical Damage Analysis of WC-Co Tip of Conical Pick due to Coal Excavation in Mines |
| title_fullStr | Critical Damage Analysis of WC-Co Tip of Conical Pick due to Coal Excavation in Mines |
| title_full_unstemmed | Critical Damage Analysis of WC-Co Tip of Conical Pick due to Coal Excavation in Mines |
| title_short | Critical Damage Analysis of WC-Co Tip of Conical Pick due to Coal Excavation in Mines |
| title_sort | critical damage analysis of wc co tip of conical pick due to coal excavation in mines |
| url | http://dx.doi.org/10.1155/2015/292046 |
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