CIRP Encyclopedia of Production Engineering

Living Edition
| Editors: The International Academy for Production Engineering, Sami Chatti, Tullio Tolio

Superhard Tools

  • Eckart Uhlmann
  • Fiona Sammler
  • John Barry
  • Javier Fuentes
  • Sebastian Richarz
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-35950-7_6411-4

Synonyms

Definition

Superhard materials for defined edge tooling may be defined as materials with a hardness exceeding 3,000 HV.

Introduction

Superhard materials also exhibit other properties which are favorable in tooling materials such as high thermal conductivity, low coefficients of thermal expansion, and low coefficient of friction on most materials. All commercial superhard materials fall within the two broad categories of diamond or cubic boron nitride (CBN). Diamond is well known as the hardest material, with single crystal diamond exhibiting hardness values of approximately 10,000 HV. Diamond materials however can be most conveniently categorized according to their microstructure/structure and corresponding method of manufacture. The five categories of “synthetic” diamond materials can thus be identified as:
  • Polycrystalline diamond or “PCD” is produced by sintering micron diamond powders under ultrahigh pressure (>5 GPa) in the presence of a metal...

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References

  1. Clark IE, Sen PK (1998) Fortschritte bei der Entwicklung ultraharter Schneidstoffe [Proceedings in the development of ultra-hard cutting materials]. Ind Diam Rundsch 32(4):274–284 (in German)Google Scholar
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  4. Reuter U (2001) Verschleißmechanismen bei der Bearbeitung von Gusseisen mit PCBN-Schneidstoffen [Wear mechanism of PcBM cutting material for the machining of cast iron]. Dissertation, TU Darmstadt, pp 3–9 (in German)Google Scholar
  5. Tönshoff HK (2011) Cutting, fundamentals. In: CIRP encyclopedia of production engineering. Springer, HeidelbergGoogle Scholar
  6. Uhlmann E, Oyanedel Fuentes JA, Keunecke M (2009) Machining of high performance workpiece materials with cBN coated cutting tools. Thin Solid Films 518:1451–1454CrossRefGoogle Scholar
  7. VDI 2840 (2005) Carbon films: basic knowledge, film types and properties. Beuth, BerlinGoogle Scholar
  8. VDI 2841 (2008) CVD diamond tools: categorisation, production and characterisation. Beuth, BerlinGoogle Scholar
  9. VDI 3824 (2002) PVD and CVD hard coatings: quality assurance: characteristic profiles and fields of application of hard coatings. Beuth, BerlinGoogle Scholar

Copyright information

© CIRP 2018

Authors and Affiliations

  • Eckart Uhlmann
    • 1
  • Fiona Sammler
    • 3
  • John Barry
    • 2
  • Javier Fuentes
    • 3
  • Sebastian Richarz
    • 3
  1. 1.Fraunhofer Institut für Produktionsanlagen und KonstruktionstechnikBerlinGermany
  2. 2.Advanced MaterialsElement Six LtdShannonIreland
  3. 3.BerlinGermany

Section editors and affiliations

  • Garret O'Donnell
    • 1
  1. 1.Trinity College DublinDublinIreland