Abstract：The traditional method of preparing cemented carbide products with complex components is difficult and costly, which affects the sustainable development of cemented carbide. The cemented carbide samples were formed by extrusion 3D printing. The sintered cemented carbide samples of WC-10Co were prepared by solvent degreasing, hot degreasing and air pressure sintering. The effects of printing parameters, degreasing process and sintering temperature on the microstructure and mechanical properties of the samples were studied. The results show that the surface roughness and dimensional accuracy of the printed samples can be adjusted by using different nozzle sizes. The shape and size of the blank are stable after degreasing by solvent-thermal two-step degreasing method. The microstructure of the alloy is uniformly distributed after sintering. After sintering at 1 450 ℃, the hardness of the alloy is 87.3 HRA, the bending strength is more than 3 500 MPa, and the performance is comparable to that prepared by conventional powder metallurgy method.
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2023, Vol. 28 
