Qin H.,Chinese National Engineering Research Center for Special Mineral Materials |
Qin H.,Guilin Research Institute Oj Geology for Mineral Resources |
Xie Z.,Chinese National Engineering Research Center for Special Mineral Materials |
Xie Z.,Guilin Research Institute Oj Geology for Mineral Resources |
And 7 more authors.
Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering | Year: 2010
The sample of the second generation FeCuCo pre-alloyed powder matrix were prepared by using vacuum sintering machine, and the fracture morphology, relative density, hardness and bending strength of matrix at different sintering temperatures were investigated. The results showed that the fracture morphology of matrix was inter granular fracture and trans granular fracture and the grain size of matrix was uniform at different sintering temperatures. With the sintering temperature increasing, the grain size of matrix gradually increased, and no abnormal coarsening of grains was observed. The relative density of matrix slightly increased then kept constant, the hardness of matrix gradually decreased, the beading strength of matrix increased then followed by a decrease. Under the pressure of 30VIPa and a dwell time of 6 minutes, the optimum sintering temperature of the second generation FeCuCo pre-alloyed powder is 850 °C, the relative density of matrix is 97. 5 % y the hardness of matrix is 105.5 11KB and the bending strength of matrix is 1839. 14 MPa. The second generation KeCuCo pre-alloyed powder demonstrates great application potential in replacing pure cobalt powder.