Mechanical Properties and Fabrication of WC-Co Hard Materials by Rapid Sintering Method for Friction Stir Welding Tool Application

Park, Hyun-Kuk; Youn, Hee-Jun; Ryu, Jung-Han; Jang, Jun-Ho; Shon, In-Jin; Oh, Ik-Hyun

doi:2012.30.6.92

J Weld Join > Volume 30(6); 2012 > Article

Research Paper

Journal of KWJS 2012;30(6):92-97.
DOI: https://doi.org/10.5781/KWJS.2012.30.6.92 Published online December 23, 2012.

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^***

Correspondence: Ik-Hyun Oh,
Email: ihoh@kitech.re.kr

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.m^1/2, respectively.

Key Words: WC-Co, Rapid sintering, FSW-Tool application, Mechanical property