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Metals and Materials International

, Volume 24, Issue 2, pp 301–305 | Cite as

Defect Control of the WC Hardmetal by Mixing Recycled WC Nano Powder and Tungsten Powder

  • Man Gyu Hur
  • Mi Kyung Shin
  • Deug Joong Kim
  • Dae Ho Yoon
Article

Abstract

Tungsten metal powder was added to recycled WC nano powder to control the macro and micro defects of WC hardmetal. The macro and micro defects caused by the excess carbon in the recycled WC powder were markedly removed after the addition of tungsten metal powder ranging from 2 to 6 wt%. The density and hardness of the WC hardmetals also increased due to the removal of defects after adding the tungsten metal powder. The density and hardness of WC hardmetals with the addition of W metal powder ranged from 8 to 12 wt% increased linearly as the W metal powder content increased due to the formation of a new (Co- and W-rich WC) composition. The surface morphology of the WC hardmetals was observed via field emission scanning electron microscopy, and a quantitative elemental analysis was conducted via X-ray fluorescence spectrometry and energy dispersive X-ray analysis. The density and hardness of the WC hardmetals were respectively measured using an analytical balance and a Vikers hardness tester. The effect on the defects in the recycled WC hardmetals through the addition of the tungsten metal powder was discussed in detail.

Keywords

Defects Recycling WC hardmetal Hardness test Sintering 

Notes

Acknowledgements

This work was supported by the “Global Excellent Technology Innovation” of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry and Energy, Republic of Korea (No. 20125010100020).

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Copyright information

© The Korean Institute of Metals and Materials 2018

Authors and Affiliations

  • Man Gyu Hur
    • 1
  • Mi Kyung Shin
    • 1
  • Deug Joong Kim
    • 1
  • Dae Ho Yoon
    • 1
  1. 1.School of Advanced Materials Science and EngineeringSungkyunkwan UniversitySuwonRepublic of Korea

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