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采用高能球磨法,在球料比为15时合成了WC-10%Co(质量分数)纳米复合材料。为抑制烧结过程中WC颗粒的长大,在粉末中添加TaC和VC作抑制剂。结果表明:由于抑制剂有效减小了WC晶粒尺寸,添加TaC能增加硬质合金的韧性,添加VC增加其硬度;对同时添加0.6%TaC和0.7%VC对材料的物理、力学性能的影响也进行研究。结果表明:WC-10%Co-0.6%TaC-0.7%VC 烧结样品的硬度达到了HV_301787,比没有抑制剂的样品高24%;断裂韧性达到8.7MPa·m1/2,比没有抑制剂的样品高35%;0.6%TaC和0.7%VC共同抑制了晶粒的长大,烧结后晶粒尺寸为3.8μm。
High-energy ball milling method was used to synthesize WC-10% Co (mass fraction) nanocomposites at a ball / material ratio of 15. In order to suppress the growth of WC particles during sintering, TaC and VC were added as inhibitors in the powder. The results show that the addition of Ta increases the hardness of the cemented carbide due to the effective reduction of the WC grain size by the addition of TaC. The effect of addition of 0.6% TaC and 0.7% VC on the physical and mechanical properties of the material Also conducted research. The results show that the hardness of WC-10% Co-0.6% TaC-0.7% VC sintered samples reaches HV_301787, which is 24% higher than that of the samples without inhibitors and the fracture toughness reaches 8.7MPa · m1 / 2, High 35%; 0.6% TaC and 0.7% VC together inhibited the grain growth, the grain size after sintering 3.8μm.