Wear of Coated Tungsten Carbide Tool In Cutting H.S. Steel Ⅲ

In last part we know that tungsten carbide tools are ideal for machining hardened sintered steel, and the coating film TiN, Ti(C,N) and (Ti,Al)N are already broadly studied. This part goes on explaining why the author choose tungsten carbide tool coated with (Al,Cr)N and hardened sintered steel as study objects.

An aluminum-chromium based coating film, namely (Al,Cr)N coating film, which exhibits a superior critical scratch load, has been developed. The aluminum-chromium based coated tungsten carbide tool was evaluated through the machining of sintered steel, and showed greatly improved performance. However, the effectiveness of the aluminum-chromium coating film is unclear when cutting hardened sintered steel.

In this study, to clarify the effectiveness of aluminum-chromium coating film for cutting hardened sintered steel, tool wear was experimentally investigated. The hardened sintered steel was turned with an aluminum-chromium based coated tungsten carbide tool according to a physical vapor deposition (PVD) method. Moreover, the tool wear of the aluminum-chromium based coated item was compared with that of (Ti,Al)N coated tools.

(To be continued. This article is divided into several parts. Here is part 3. For part 2, please refer to ; for part 4, please refer to )

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