Effects of Holding Time on the Sintering of Cemented Tungsten Carbide Powder and Bonding with High-Strength Steel Wire

Authors

Mahadi Hasan, University of WollongongFollow
Jingwei Zhao, University of WollongongFollow
Zhenyi Huang, Anhui University of Science & Technology
Hui Wu, University of WollongongFollow
Fanghui Jia, University of WollongongFollow
Zhengyi Jiang, University of WollongongFollow

RIS ID

136914

Publication Details

Hasan, M., Zhao, J., Huang, Z., Wu, H., Jia, F. & Jiang, Z. (2019). Effects of Holding Time on the Sintering of Cemented Tungsten Carbide Powder and Bonding with High-Strength Steel Wire. Journal of Materials Engineering and Performance, 28 (7), 4074-4085.

Abstract

Cemented tungsten carbide (WC-10Co) and high-strength (AISI 4340) steel were successfully bonded by hot compaction diffusion bonding at a low temperature. The effects of holding time (5-50 min) on microstructure and mechanical properties of the sintered carbides and bonding strengths of the dissimilar bilayered composite materials were examined. The results show that the mechanical properties of the carbides increase, but the bonding strength increases firstly and then decreases with the increase in holding time. The maximum density and hardness achieved are 95.92 and 99.5%, respectively. A transitional layer forms at the interface as a result of elemental interdiffusion. The depth of the layer increases with the increase in holding time. The optimal bonding time is determined to be 40 min at a temperature of 1200°C and a pressure 160 MPa, by which the maximum bonding strength of 204 MPa of the WC-10Co/4340 steel joints can be achieved.