粉末冶金制备Laves相NbCr2化合物的强韧化研究进展
Research Progress on Strengthening for Laves NbCr2 Intermetallics Prepared by Powder Metallurgy
聂小武, 何 燕, 熊顺林, 刘振德
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作者单位：湖南铁路科技职业技术学院 机械工程系, 湖南 株洲 412000
中文关键字：Laves相； Nb-Cr系合金； 粉末冶金； 断裂韧性
英文关键字：Laves phase; Nb-Cr system alloy; powder metallurgy; fracture toughness
中文摘要：综述了采用粉末冶金法制备Laves相NbCr2合金的历史及现状，包括粉末冶金工艺以及合金的组织演变及其特征、力学性能及合金化元素的作用，并将粉末冶金Laves相NbCr2合金的力学性能与铸造法制备的合金性能进行对比。发现采用粉末冶金法制备的合金力学性能及抗氧化性显著优于铸造法制备合金的性能。
英文摘要：The development of NbCr2 alloy prepared by powder metallurgy technology is described in details, including powder metallurgy technology, the evolution and characteristic of microstructure and mechanical properties, and the effects of alloying element additions on the Nb-Cr system. The mechanical properties of NbCr2 prepared by powder metallurgy are compared with that by casting technology. It can be obtained that the mechanical properties and oxidation behavior of the samples prepared by powder metallurgy are more than that by casting technology.