Due to their high hardness and high strength, VC reinforced hard materials such as high vanadium high-speed steel (HVHSS) are not suitable for machining to obtain complex shape with low cost. Therefore, 3D gel printing (3DGP) was employed to print HVHSS parts, using highly loaded slurry with 60% solid content as printing slurry. After printing parameters optimization, the printing sample had good surface quality, and obvious printing lines were observed. The extruded filament was in-situ cured, thus enough to maintain the designed shape. Uniform sintering shrinkage with a shrinkage rate of about 15% was obtained in the as-sintered sample with relative density of 99%. The surface roughness decreased from 6.5 µm to 3.8 µm. Fine carbides (<1 µm) and dense microstructure were achieved. Besides, the as-sintered sample had comprehensive performance of HRC60 in hardness, 3000 MPa in bend strength, and 20–26 J in impact energy. This study proposed one promising method to directly manufacture complex-shaped hard materials without subsequent machining.

由于其高硬度和高强度，VC增强硬质材料（例如高钒高速钢（HVHSS））不适合用于机加工以低成本获得复杂形状。因此，使用3D凝胶印刷（3DGP）来印刷HVHSS零件，使用具有60％固体含量的高负荷浆料作为印刷浆料。优化印刷参数后，印刷样品的表面质量良好，观察到明显的印刷线条。将挤出的长丝原位固化，从而足以保持设计的形状。在相对密度为99％的烧结样品中获得了约15％的收缩率的均匀烧结收缩率。表面粗糙度从6.5μm降低到3.8μm。获得了细小的碳化物（<1 µm）和致密的组织。除了，烧结后的样品具有HRC60的综合性能，硬度，3000 MPa的弯曲强度和20–26 J的冲击能。这项研究提出了一种有前途的方法，可以直接制造复杂形状的硬质材料而无需随后的机械加工。