高密度 W-Ni-Fe合金因其具备许多优异性能，作为一种重要的军民两用合金材料，广泛应用于国防军工、航空航天、先进制造业等众多领域。稀土元素作为工业的“维生素”，因其独特的性质及活性，添加在合金中，能有效的抑制晶粒长大、细化晶粒组织和提高合金力学性能，已成为制备高强韧、超细晶钨合金的重要途径和研究热点。综述了国内外采用稀土元素及其氧化物强化细晶钨合金的研究进展，分析了目前存在的问题，并对未来进一步提高合金的性能提出了展望。
W-Ni-Fe heavy alloys were widely used in national defense military industry,aerospace,advanced manufacturing industry and other fields due to its excellent properties.Moreover,as the vitamin for industry, the rare earth elements with their unique performance and activity could effectively restrain grain growth,refine grain organization and improve the mechanical properties.Therefore,adding rare earth elements into W-Ni-Fe heavy alloys became one of the important approach and hottest researches.The present paper reviews the do-mestic and abroad research progress in which reinforcement fine grain tungsten alloys by using the rare earth el-ements and its oxide,analyzes the existing problems,and looks forward to further improve the performance of alloys in future.
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