Influence of WC grain size and Co mass content on mechanical properties of WC-Co cemented carbides

Shingo Okamoto, Kakuroh Ohtuka, Yuji Nakazono, Yoshinobu Shimoitani, Jun Takada

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The mechanical properties of WC-Co cemented carbides were investigated in order to find the way to lengthen the lives of the bits including WC-Co cemented carbides, installed in tunnel boring machines. The compression and bending tests were first carried out using the test pieces made of the WC-Co cemented carbides including Co of 10%, of which grain size was 3, 6, 20 or 30 [μm], and the ones of which grain size was 20 [μm], including Co of 5, 10, 15 or 20%. The finite-element analysis was performed to find the tensile strength using the results of the compression and bending tests. We were able to draw an interesting results as follows: WC-Co cemented carbides of which grain size is 20 or 30 [μm] has the property of ductility, while the ones of which grain size is 3 or 6 [μm] has the property of brittleness.

Original languageEnglish
Pages (from-to)447-452
Number of pages6
JournalZairyo/Journal of the Society of Materials Science, Japan
Volume54
Issue number4
DOIs
Publication statusPublished - Apr 2005

Keywords

  • Brittleness
  • Co mass content
  • Ductility
  • Strength
  • WC grain size
  • WC-Co cemented carbides

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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