A study was carried out to investigate the influence of the initial powder features on the microstructure, the phase composition, and on the mechanical properties of WC-12%Co samples produced by binder jetting and densified by sintering in vacuum at 1400 °C and by sinter-HIPing. The initial powder consisted of a mixture of fine-grained and coarse-grained WC-based particles, and W₂C-based ones. The density of the printed samples was 97.4% and 99.3% after sintering and sinter-HIPing, respectively. Layer-oriented porosity was observed only in sintered samples. The microstructure of the samples consisted of a mixture of fine and coarse WC grains, which can be the result of the coalescence of grains from anomalous coarse grains in the powder particles. Vickers hardness and transverse rupture strength of sinter-HIPed samples are 1205 HV and 2257 MPa, respectively, which is coherent with the microstructural analysis and close to coarse-grained commercial products.

进行了一项研究，以研究初始粉末特征对 WC-12%Co 样品的微观结构、相组成和机械性能的影响，这些样品是通过粘合剂喷射生产的，并通过在 1400 °C 下真空烧结和通过烧结-HIPing。初始粉末由细粒和粗粒 WC 基颗粒的混合物组成，W ₂基于 C 的。烧结和烧结热等静压后印刷样品的密度分别为 97.4% 和 99.3%。仅在烧结样品中观察到层取向的孔隙。样品的微观结构由细颗粒和粗 WC 颗粒的混合物组成，这可能是粉末颗粒中异常粗颗粒的颗粒聚结的结果。烧结 HIPed 样品的维氏硬度和横向断裂强度分别为 1205 HV 和 2257 MPa，这与显微组织分析一致并且接近粗粒商业产品。