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用扫描电镜(SEM)、表面轮廓仪、X射线衍射仪(XRD)、电子探针(EPMA)和显微硬度计等方法,研究了强流脉冲离子束辐照WC-Co硬质合金的组织与性能。结果表明,HIPIB辐照使硬质合金表面发生快速重熔和Co粘结相的优先烧蚀,导致六方α-WC相向立方β-WC_(1-x)相转变,形成丘状凸起重熔烧蚀形貌;硬质合金表面硬度随束流密度和辐照次数的增加先增加后减小,归因于辐照硬质合金表面重熔致密化、Co粘结相优先烧蚀、β-WC_(1-x)相转变以及表面微裂纹的产生。
The microstructure of WC-Co cemented carbide irradiated by high-intensity pulsed ion beam was studied by scanning electron microscope (SEM), surface profiler, XRD, EPMA and microhardness tester. And performance. The results show that HIPIB irradiation causes rapid remelting on the cemented carbide surface and preferential ablation of the Co binder phase, resulting in the transformation of the hexagonal α-WC phase cubic β-WC_ (1-x) phases to form dome-shaped raised remelt Ablation morphology. The hardness of the cemented carbide surface firstly increases and then decreases with the increase of the beam current density and the number of irradiation, which is attributed to the remelting densification of the irradiated cemented carbide surface, the preferential ablation of the Co binder phase, the β- WC_ (1-x) phase transformation and the generation of surface microcracks.