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JWJ > Volume 30(6); 2012 > Article
Journal of KWJS 2012 December;30(6) :92-97.
Published online December 23, 2012.
doi:https://doi.org/10.5781/KWJS.2012.30.6.92
Mechanical Properties and Fabrication of WC-Co Hard Materials by Rapid Sintering Method for Friction Stir Welding Tool Application
Hyun-Kuk Park*,**, Hee-Jun Youn*, Jung-Han Ryu*, Jun-Ho Jang*, In-Jin Shon**, Ik-Hyun Oh***
*Korea Institute of Industrial Technology (KITECH), Automotive Components R&D Group, Gwang-Ju, Gwang-ju 500-480, Korea
**Division of Advanced Materials Engineering and the Research Center of Advanced Materials Devlopment, Engineering College, Chonbuk National University, jeon-ju 561-756, Korea
***Korea Institute of Industrial Technology (KITECH), Honam, Gwang-Ju 500-480, Kor
Correspondence: Ik-Hyun Oh  Email: ihoh@kitech.re.kr
  Published online December 23, 2012
ABSTRACT
Using the pulsed current activated sintering method, the WC-10wt.% Co materials were densified using a WC and Co powder. The WC-Co almost completely dense with a relative density of up to 99.5 % after the simultaneous application of a pressure of 60 MPa and an electric current for 3 minutes almost without any significant change in the grain size. The average grain size of about 0.3 ㎛. The hardness and fracture toughness at 1000℃were about 2200 kg/mm2 and 9.8 MPa.m1/2, respectively.
Keywords: WC-Co | Rapid sintering | FSW-Tool application | Mechanical property
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