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Date of Publication:2013-01-01

Journal:金刚石与磨料磨具工程

Volume:33

Issue:1

Page Number:48-52

ISSN No.:1006-852X

Abstract:PCBN tool and ceramic tool were used to cut hardened die steel Cr12MoV at high speed. Tool life, tool wear forms and mechanisms were studied. Results showed that: under the same conditions, tool life of PCBN tool was 2 to 3 times than that of ceramic tool; when cutting speed increased from 153 m/min to 241 m/min, tool life of both tools decreased by more than 50%; wear form of both tools was crater and flank wear under relatively low speed, but it became breakage under the relatively high speed, including tipping and exfoliated, etc; wear mechanisms of PCBN tool were mainly adhesive wear, oxidation wear and diffusion wear, while those of ceramic tool were mainly abrasive wear, adhesive wear and diffusion wear; under the same cutting conditions, the abrasive wear resistance of PCBN tool was better than that of ceramic tool, but its oxidation resistance was lower. Cutting speed had a significant effect on wear mechanism, which was that as the cutting speed increased, abrasive wear and adhesive wear became weaker.

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