Nanometer WC and Co powders were used as raw materials, gradient former of V(C, N) and traditional gradient former of Ti(C, N) were added respectively to prepare gradient cemented carbide by a two-step sintering process. The results showed that nanocrystalline gradient cemented carbide was prepared by adding gradient former of V(C, N), and ultrafine gradient cemented carbide was prepared by adding gradient former of Ti(C, N). Growth of WC grains were inhibited and the gradient layer was thickened by adding the gradient former of V(C, N). The mechanical properties of the alloy with V(C, N) were better than those of alloy with Ti(C, N).

中文翻译：

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添加V(C,N)梯度形成剂制备纳米晶梯度硬质合金

以纳米WC和Co粉为原料，分别加入V(C,N)梯度形成剂和Ti(C,N)传统梯度形成剂，通过两步烧结法制备梯度硬质合金。结果表明，加入V(C,N)梯度形成剂制备纳米晶梯度硬质合金，加入Ti(C,N)梯度形成剂制备超细梯度硬质合金。V(C,N)梯度形成剂的加入抑制了WC晶粒的生长，使梯度层增厚。V(C,N)合金的力学性能优于Ti(C,N)合金。