WC-Co composite powder with nano‑cobalt coatings doped with rhenium (Re) varying from 0 to 3 wt% were prepared by a novel sol-gel method. The effects of Re on the microstructure and mechanical properties of WC-10(Co, xRe) cemented carbides fabricated by composite powder were studied by XRD, SEM and TEM. The results indicated that C₄H₆CoO₄·4H₂O with or without NH₄ReO₄ was homogenously distributed on WC powder particles. After reduction in H₂ atmosphere, nano‑cobalt with Re was coated on WC particles with a uniform distribution in composite powder. WC-10(Co, xRe) cemented carbide containing Re exhibited homogeneous grain distribution. Moreover, no stabilization effect for hexagonal close-packed (hcp) cobalt by Re addition was found mainly due to the minor additive amount and the unique preparation method. WC grains were refined and binder phases were strengthened due to the dissolved Re in binder phases. With increasing the content of Re from 0 to 3 wt%, an improved microstructure led to better mechanical properties, the hardness increased from 87.8 ± 0.1 HRA to 89.4 ± 0.2 HRA, transverse rupture strength (TRS) increased from 2810 ± 89 MPa to 3410 ± 113 MPa.

通过新型的溶胶-凝胶法制备了掺有0％至3％（重量）varying（Re）的纳米钴涂层的WC-Co复合粉末。通过XRD，SEM和TEM研究了Re对复合粉末制备的WC-10（Co，x Re）硬质合金组织和力学性能的影响。结果表明，具有或不具有NH ₄ ReO _4的C ₄ H ₆ CoO ₄ ·4H ₂ O均匀分布在WC粉末颗粒上。在减少H ₂气氛后，将具有Re的纳米钴涂覆在WC颗粒上，并在复合粉末中均匀分布。WC-10（Co，xRe）含Re的硬质合金表现出均匀的晶粒分布。此外，未发现通过添加稀土对六方密堆积（hcp）钴的稳定作用，这主要是由于添加量少和制备方法独特。由于溶解在粘结剂相中的Re，细化了WC晶粒并增强了粘结剂相。随着Re含量从0增加到3 wt％，改善的微观结构导致更好的机械性能，硬度从87.8±0.1 HRA增加到89.4±0.2 HRA，横向断裂强度（TRS）从2810±89 MPa增加到3410 ±113兆帕