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Characterization of tool wear when machining Alloy 718 with high pressure cooling using conventional and surface-modified WC-Co tools

Philipp Hoier (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; Uta Klement (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; Nageswaran Tamil Alagan ; Tomas Beno ; Anders Wretland
Conference Proceedings of the 7th International Swedish Production Symposium (2016)
[Konferensbidrag, refereegranskat]

Coolant supplied by high pressure into the cutting zone has shown to lower thermal loads on the tool when machining difficult-to-cut materials as Alloy 718. In this study, we investigate how the combination of high pressure cooling and tool-surface modifications can lead to further improvements regarding tool life. The general approach is to enhance the coolant-tool interaction by increasing the contact area. Therefore, we machined cooling features into flank and rake faces of commercially available cemented tungsten carbide inserts. In this way, the surface area was increased by ~ 12%. After the cutting tests, the tools were analyzed by scanning electron microscopy combined with energy-dispersive X-ray spectroscopy. Compared with conventional tools, the tool modifications reduced the flank wear by 45% for the investigated cutting parameters. Furthermore, we were able to significantly increase the cutting speed and feed rate without failure of the tool. The investigated surface modifications have great potential to enhance the productivity of metal cutting processes.

Nyckelord: Superalloy, high-pressure jet assisted machining, tool modification, wear characterization



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Denna post skapades 2016-12-12. Senast ändrad 2017-06-28.
CPL Pubid: 246048

 

Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik (2005-2017)

Ämnesområden

Materialvetenskap
Produktion
Mekanisk tillverkningsteknik
Metallurgisk produktionsteknik

Chalmers infrastruktur