Tool Wear of Multi-Layer AlCrWN/AlCrWSiN-Coated Cemented Carbide in Cutting Hardened Sintered Steel

Abstract:

In order to clarify the effectiveness of the multi-layer AlCrWN/AlCrWSiN-coated cemented carbide tool, the wear progress was investigated in cutting hardened sintered steel using three types of coated tool. Namely, Tool I had the dual-layer (Al60,Cr25,W15)(C,N)/(Al53,Cr23,W14,Si10)(C,N)-coating film, Tool II had the multi-layer (Al60,Cr25,W15)(C,N)/(Al53,Cr23,W14,Si10)(C,N)-coating film and Tool III had the multi-layer (Al60,Cr25,W15)N/(Al53,Cr23,W14,Si10)N-coating film. The following results were obtained: (1) The main tool failure of the three types of coated tools were the flank wear within the maximum value of the flank wear width of 0.2 mm. (2) The critical scratch load of the three types of coated tools was 130 N or more. (3) The micro-hardness of Tool III 3000 HV0.25N was the highest among the three types of coated tools. (4) The mean value of the friction coefficient of the (Al53,Cr23,W14,Si10)N coating film, 0.21, was approximately half that of the (Al53,Cr23,W14,Si10)(C,N) coating film, 0.41. (5) In the case of the higher cutting speed, the wear progress of the multi-layer coating system was slower than that of the dual-layer coating system. (6) In the case of the cutting hardened sintered steel using the multi-layer coated tool, the wear progress of the Type III coated tool was slower than that of the Type II coated tool.

• Periodical: Solid State Phenomena (Volume 266)
• Pages: 69-75
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.266.69
• Online since: October 2017
• Authors: Tadahiro Wada*
• Keywords: (Al,Cr,W)-Based Coating Film, (Al,Cr,W,Si)-Based Coating Film, Cutting, Hardened Sintered Steel, Multi-Layer Coating System, Physical Vapor Deposition Coating Method

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