Influence of oxygen on the tool wear in machining

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Abstract

High temperatures generated in machining are known to facilitate oxidation wear. A controlled atmosphere chamber was developed to investigate the effects of oxygen on tool wear and high speed machining tests were conducted on air and in argon. Cemented carbide, cermet and cubic boron nitride tooling was used on alloyed steel, hardened tool steel and superalloy Alloy 718. Machining in argon resulted in higher flank wear, higher cutting forces, and larger tool–chip contact length on the rake face. However, in hard machining, argon atmosphere reduced rake cratering. Transmission electron microscopy of tools worn on air showed formation of nanocrystalline Al2O3 film on the rake when machining aluminium containing Alloy 718, while no oxide films was detectable in the other cases.

Original languageEnglish
Pages (from-to)79-82
Number of pages4
JournalCIRP Annals - Manufacturing Technology
Volume67
Issue number1
DOIs
Publication statusPublished - 2018 Jan 1

Subject classification (UKÄ)

  • Other Materials Engineering

Free keywords

  • Machining
  • Oxidation
  • Wear

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