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介绍了传统硬质合金晶粒生长抑制机理-吸附机理与溶解度机理所面临的挑战以及硬质合金晶粒生长抑制机理研究的突破途径。指出,VC+Cr3C2+Ln(稀土)新型高效晶粒生长复合抑制剂的开发与V-Cr-Ln自润滑功能基元的最新发现为硬质合金晶粒生长抑制机理研究与功能导向高性能超细硬质合金研发提供了获得重要突破的可能,抑制剂掺杂硬质合金烧结过程中合金组元之间的溶解与界面偏析协同行为研究是晶粒生长抑制机理、合金强韧化机理以及稀土掺杂硬质合金服役过程中稀土定向迁移机理研究的关键环节与亟待解决的重要科学问题。同时也介绍了抑制剂掺杂硬质合金烧结过程中合金组元之间溶解与界面偏析协同行为的研究方法与研究意义。
The mechanism of grain growth inhibition of traditional cemented carbide, the challenge of adsorption mechanism and solubility mechanism, and the breakthrough of the study on the growth inhibition mechanism of cemented carbide grain are introduced. It is pointed out that the latest discovery of VC + Cr3C2 + Ln (rare earth) novel high efficient grain growth compound inhibitor and the latest discovery of V-Cr-Ln self-lubricating functional element are the research on the mechanism of grain growth inhibition of Cemented carbide Research and development of fine cemented carbide offers the possibility of obtaining important breakthroughs. The study on the synergistic behavior of dissolution and interfacial segregation between the alloy elements during the sintering process of the inhibitor-doped cemented carbide is a mechanism of grain growth inhibition, the mechanism of strengthening and toughening of the alloy, Key Links in the Study of Mechanism of Directional Migration of Rare Earths During Operation of Doped Cemented Carbides and Important Scientific Problems to be Solved. At the same time, the research methods and research significance of the synergistic behavior of dissolution and interfacial segregation between alloy elements during the sintering of inhibitor-doped cemented carbide are also introduced.