Journal
CERAMICS INTERNATIONAL
Volume 48, Issue 10, Pages 13695-13705Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2022.01.251
Keywords
Al2O3-WC-TiC-graphene ceramic tool; Cutting performance; Wear mechanisms; Anti-friction and wear resistance performances
Categories
Funding
- National Natural Science Founda-tion of China [51775315]
- Key Technology Research and Develop-ment Program of Shandong Province [2019JZZY010114]
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The Al2O3-WC-TiC-graphene composite ceramic tool fabricated by two-step hot pressing shows superior cutting performance and good anti-friction and wear resistance properties. The contributions of graphene to the mechanical properties, lubricating properties and thermal conductivity of the tool are responsible for its enhanced cutting performance.
The Al2O3-WC-TiC-graphene composite ceramic tool (AWTG0.5) fabricated by two-step hot pressing was used to continuously turn the hardened 40Cr steel at different cutting speeds, and its cutting performance and wear mechanisms were compared with the homemade graphene-free AWTG0 ceramic tool and the commercial ceramic tools SG4 and LT55. The cutting performance of the AWTG0.5 tool was significantly better than that of the AWTG0, SG4 and LT55 tools. The contributions of graphene to the mechanical properties, lubricating properties and thermal conductivity of the AWTG0.5 tool were responsible for its higher cutting performance. The main wear mechanisms of the AWTG0.5 tool were adhesive wear and abrasive wear. In addition, it was also found that the anti-friction and wear resistance performances of the AWTG0.5 tool were superior to those of the other three tools. Its good anti-friction and wear resistance performances could be attributed to the formation of a self-lubricating layer induced by graphene pull-out.
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