| Autor: |
Shipeng LI, Hongyang SUN, Xuda QIN, Hao LI, Qing ZHAO |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Journal of Advanced Mechanical Design, Systems, and Manufacturing, Vol 15, Iss 1, Pp JAMDSM0004-JAMDSM0004 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
1881-3054 |
| DOI: |
10.1299/jamdsm.2021jamdsm0004 |
| Popis: |
Dry drilling gives a higher request to the anti-friction property of cutting tools. However, most tool coatings commonly have less lubricant effect. In present paper, WS2/Cr layer was deposited on AlCrN layer by a radio frequency magnetron sputtering system, forming the WS2/Cr-AlCrN lubricant-hard coatings. Its microstructure was studied using scanning electric microscope (SEM) and X-ray diffraction (XRD). Dry sliding tests were carried out against Ti6Al4V balls to evaluate the lubricant effect of the lubricant-hard coatings with different Cr contents in WS2/Cr layer. Dry drilling performance of WS2/Cr-AlCrN coating was also studied compared with uncoated and AlCrN coated tool in dry drilling of Ti6Al4V and 7075Al. It is found that as Cr contents increased, WS2/Cr became denser but the crystallinity decreased. The coating with Cr content of ~9.8 at.% had the best lubricant effect with the lowest friction coefficient and the narrowest wear track. Dry drilling tests show that WS2/Cr-AlCrN coated tool had the longest tool life and produced the lowest surface roughness. The high wear resistance of AlCrN layer was mainly played near cutting edge. While the anti-friction role of the lubricant layer was mainly played on drill flute, resulting in less material adhesion and improved chip removal. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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