Details
| Original language | English |
|---|---|
| Title of host publication | THE "A" Coatings - Selected peer-reviewed papers from the 14th International Conference 2020, THE A COATINGS |
| Editors | Marion Merklein, Konstantinos Dionysios Bouzakis, Konstantinos Dionysios Bouzakis, Nikolaos Michailidis, Berend Denkena, Kirsten Bobzin |
| Pages | 28-35 |
| Number of pages | 8 |
| Volume | 404 DDF |
| Publication status | Published - Oct 2020 |
| Event | 14th International Conference on THE A Coatings, 2020 - Nuremberg, Germany Duration: 19 Nov 2020 → 20 Nov 2020 |
Publication series
| Name | Defect and Diffusion Forum |
|---|---|
| ISSN (Print) | 1662-9507 |
Abstract
The machining of difficult-to-cut materials such as titanium plays a key role in several industries such as aerospace or medical. Approaches to overcome many difficulties when machining these materials, such as the long-chipping behaviour and tool wear due to the work hardening of titanium, can be an appropriate coating system for cemented carbide cutting tools. However, the atmosphere under which machining takes place, influencing the chemical tool wear, has not been taken into consideration. This work examines the tribochemical wear resistance of TiN, TiAlN and CrAlN coated carbide tools under different atmospheric conditions when cutting Ti6Al-4V. Air, technically pure argon and silane-doped argon is used to determine the influence of different oxygen levels on the wear behaviour of the tools. It has been found that oxidation of tools and tool coatings plays a significant role in tool wear when dry cutting titanium. Best results were generated using CrAlN and uncoated inserts where an increase in tool life up 60 % can be achieved when cutting in oxygen levels corresponding to extreme high vacuum (XHV) adequate atmospheres by using silane-doped argon. The benefits of XHV adequate atmospheres also have an effect on TiAlN-and TiN based coatings, but the chemical interaction of Ti element in the coating with the workpiece material, which presumably reduces wear resistance of cutting tools, cannot be outweighted or equalised by applying oxygen free atmospheres.
Keywords
- Cemented carbide, Chemical wear, Coating, Titanium
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Radiation
- Materials Science(all)
- Physics and Astronomy(all)
- Condensed Matter Physics
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THE "A" Coatings - Selected peer-reviewed papers from the 14th International Conference 2020, THE A COATINGS. ed. / Marion Merklein; Konstantinos Dionysios Bouzakis; Konstantinos Dionysios Bouzakis; Nikolaos Michailidis; Berend Denkena; Kirsten Bobzin. Vol. 404 DDF 2020. p. 28-35 (Defect and Diffusion Forum).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Wear behaviour of coated cemented carbide inserts in an oxygen-free atmosphere when machining ti-6al-4v
AU - Denkena, Berend
AU - Dittrich, Marc André
AU - Krödel, Alexander
AU - Worpenberg, Sebastian
AU - Matthies, Jonas
AU - Schaper, Florian
N1 - Funding information: The work presented in this paper has been supported within the framework of the Collaborative Research Centre (Sonderforschungsbereich - SFB 1368) entitled “oxygen free production” of the German Research Foundation (Deutsche Forschungsgemeinschaft - DFG). The authors gratefully acknowledge the financial support of the German Research Foundation (DFG) within the project.
PY - 2020/10
Y1 - 2020/10
N2 - The machining of difficult-to-cut materials such as titanium plays a key role in several industries such as aerospace or medical. Approaches to overcome many difficulties when machining these materials, such as the long-chipping behaviour and tool wear due to the work hardening of titanium, can be an appropriate coating system for cemented carbide cutting tools. However, the atmosphere under which machining takes place, influencing the chemical tool wear, has not been taken into consideration. This work examines the tribochemical wear resistance of TiN, TiAlN and CrAlN coated carbide tools under different atmospheric conditions when cutting Ti6Al-4V. Air, technically pure argon and silane-doped argon is used to determine the influence of different oxygen levels on the wear behaviour of the tools. It has been found that oxidation of tools and tool coatings plays a significant role in tool wear when dry cutting titanium. Best results were generated using CrAlN and uncoated inserts where an increase in tool life up 60 % can be achieved when cutting in oxygen levels corresponding to extreme high vacuum (XHV) adequate atmospheres by using silane-doped argon. The benefits of XHV adequate atmospheres also have an effect on TiAlN-and TiN based coatings, but the chemical interaction of Ti element in the coating with the workpiece material, which presumably reduces wear resistance of cutting tools, cannot be outweighted or equalised by applying oxygen free atmospheres.
AB - The machining of difficult-to-cut materials such as titanium plays a key role in several industries such as aerospace or medical. Approaches to overcome many difficulties when machining these materials, such as the long-chipping behaviour and tool wear due to the work hardening of titanium, can be an appropriate coating system for cemented carbide cutting tools. However, the atmosphere under which machining takes place, influencing the chemical tool wear, has not been taken into consideration. This work examines the tribochemical wear resistance of TiN, TiAlN and CrAlN coated carbide tools under different atmospheric conditions when cutting Ti6Al-4V. Air, technically pure argon and silane-doped argon is used to determine the influence of different oxygen levels on the wear behaviour of the tools. It has been found that oxidation of tools and tool coatings plays a significant role in tool wear when dry cutting titanium. Best results were generated using CrAlN and uncoated inserts where an increase in tool life up 60 % can be achieved when cutting in oxygen levels corresponding to extreme high vacuum (XHV) adequate atmospheres by using silane-doped argon. The benefits of XHV adequate atmospheres also have an effect on TiAlN-and TiN based coatings, but the chemical interaction of Ti element in the coating with the workpiece material, which presumably reduces wear resistance of cutting tools, cannot be outweighted or equalised by applying oxygen free atmospheres.
KW - Cemented carbide
KW - Chemical wear
KW - Coating
KW - Titanium
UR - http://www.scopus.com/inward/record.url?scp=85096412180&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/ddf.404.28
DO - 10.4028/www.scientific.net/ddf.404.28
M3 - Conference contribution
AN - SCOPUS:85096412180
SN - 9783035736953
VL - 404 DDF
T3 - Defect and Diffusion Forum
SP - 28
EP - 35
BT - THE "A" Coatings - Selected peer-reviewed papers from the 14th International Conference 2020, THE A COATINGS
A2 - Merklein, Marion
A2 - Bouzakis, Konstantinos Dionysios
A2 - Bouzakis, Konstantinos Dionysios
A2 - Michailidis, Nikolaos
A2 - Denkena, Berend
A2 - Bobzin, Kirsten
T2 - 14th International Conference on THE A Coatings, 2020
Y2 - 19 November 2020 through 20 November 2020
ER -