摘要
目的分析热处理过程中高Nb-TiAl合金显微组织的演化规律,为高Nb-TiAl合金的应用提供理论指导。方法采用真空非自耗电弧熔炼Ti-46Al-8Nb-xN(x=0.7,1.4)合金铸锭,在α+γ两相区对合金进行固溶水淬,然后对合金进行不同时间的时效处理。运用OM,SEM等方法对合金的组织进行分析。结果与结论随着热处理时间的增加,合金组织片层团均有逐渐粗化现象,且存在一次析出物Ti2AlN的聚集现象。当热处理时间达到12 h后,在1.4N合金中有二次析出物Ti3AlN产生。
Purposes—To analyze the evolution law of microstructure of high Nb-TiAl alloy during heat treatment,and to provide theoretical guidance for the application of high Nb-TiAl alloys.Methods—Ti-46 Al-8 Nb-xN(x=0.7,1.4)alloy ingots are melted by vacuum non-consumable arc melting technology.The alloys are quenched by water after solid solution in the two-phase region ofα+γ,and then aged at different time.Finally,the microstructures of alloy are analyzed by OM and SEM.Result and Conclusion—With the time increase of heat treatment,the lamellar colony of alloy gradually coarsens.Moreover,there is an aggregation phenomenon of precipitate Ti2AlN.The secondary precipitate Ti3AlN is produced in 1.4 N alloy after 12 hours of heat treatment.
作者
张璠
吴泽恩
ZHANG Fan;WU Ze-en(College of Mechanical,Engineering Baoji University of Arts and Sciences,Baoji 721016,Shaanxi.China;Baoji Engineering Research Center of Robot Testing and Measuremenl,Baoji 721016,Shaanxi,China)
出处
《宝鸡文理学院学报（自然科学版）》
CAS
2020年第2期39-42,共4页
Journal of Baoji University of Arts and Sciences(Natural Science Edition)
基金
宝鸡文理学院重点项目(ZK2018064,ZK2018098)
宝鸡市科技计划项目(2018JH-30)。
