Tool Wear of Aluminum/Chromium/Tungsten-Based-Coated Cemented Carbide Tools in Cutting Sintered Steel

In this study, to clarify the effectiveness of an aluminum/chromium/tungsten-based-coated tool for cutting sintered steel, tool wear was experimentally investigated. The sintered steel was turned with the (Al60,Cr25,W15)N-, (Al60,Cr25,W15)(C,N)- and (Al64,Cr28,W8)(C,N)-coated cemented carbide tools according to the physical vapor deposition (PVD) method. Moreover, the tool wear of the aluminum/chromium/tungsten-based-coated item was compared with that of the (Al,Cr)N coated tool. Furthermore, to clarify the tool wear mechanism of the aluminum/chromium/tungsten-coating film for cutting sintered steel, Scanning Electron Microscope observation and Energy Dispersive x-ray Spectroscopy mapping analysis were conducted on the abraded surface. The following results were obtained: (1) The wear progress of the (Al64,Cr28,W8)(C,N)-coated tool was the slowest among that of the five coated tools. (2) Adding carbon (C) to the aluminum/chromium/tungsten-based-coating film was effective for improving the wear-resistance. (3) The main wear mechanism of the (Al60,Cr25,W15)N-, the (Al60,Cr25,W15)(C,N)- and the (Al64,Cr28,W8)(C,N)-coating films was abrasive wear.

Authors:

• Tadahiro Wada
• Hiroyuki Hanyu

Keywords:

• Cutting
• physical vapor deposition coating method
• tool wear
• tool wear mechanism
• sintered steel.

References:

[1] Tadahiro Wada, Koji Iwamoto, Hiroyuki Hanyu and Kinya Kawase,
"Tool wear of (Al,Cr)N coated cemented carbide in cutting sintered
steel”, Journal of the Japan Society of Powder and Powder Metallurgy,
Vol. 58, 2011, pp.459-462 (in Japanese).
[2] Tadahiro Wada, Mitsunori Ozaki, Hiroyuki Hanyu, and Kinya Kawase,
“Tool Wear of Aluminum-Chromium Based Coated Cemented Carbide in
Cutting Hardened Sintered steel”, IACSIT International Journal of
Engineering and Technology, Vol. 6, No. 3, 2014, pp.223-226.
[3] Tadahiro Wada and Hiroyuki Hanyu, “Tool Wear of
Aluminum/Chromium/Tungsten-based-coated Cemented Carbide in
Cutting Hardened Steel”, Proceedings of 2014 IMSS International
Conference on Future Materials Engineering (ICME 2014), October
27-28, 2014, Paris, France.
[4] Tadahiro Wada and Hiroyuki Hanyu, “Tool Wear of
Aluminum/Chromium/Tungsten-based-coated Cemented Carbide in
Cutting Hardened Sintered Steel”, Proceedings of 2014 International
Conference on Power Science and Engineering (ICPSE 2014), December
18 - 20, 2014, Barcelona, Spain.
[5] Tadahiro Wada and Hiroyuki Hanyu, “Wear Mechanism of
Aluminum/Chromium/Tungsten-based-coated Cemented Carbide Tools
in Dry Cutting of Hardened Sintered Steel”, Proceedings of 3rd
International Conference on Aerospace, Mechanical, Automotive and
Materials Engineering (ICAMME'15), March 29-30, 2015, Singapore.