Effect of Zr addition on precipitates in K4169 superalloy

查看全文 作　　者：Li [1]Yamin;Liu [1]Hongjun;Liu [1]Jie;Wang [1]Zhipeng;Hao [1]Yuan

机构地区：[1]Key Laboratory of Non-ferrous Metal Alloys and Processing,Ministry of Education,Lanzhou University of Technology,Lanzhou730050,China

出　　处：《China Foundry》索引2012年第9卷第1期,共5页

基　　金：financially supported by the Natural Science Foundation of Gansu Province,China (No.3ZS042-B25-028) 摘　　要：In order to investigate the effect of Zr addition on the precipitations of K4169 superalloy,a manual electric arc furnace was used to prepare the superalloy with different Zr addition from 0.03wt.% to 0.07wt%.After standard heat treatment and long-time aging,the microstructures of the alloys were observed using XRD,SEM and TEM.The results show that Zr not only inhibits the precipitation of Laves phase at the grain boundary,but also significantly promotes the precipitation of earlobe-like γ' and γ″ phases.After long time aging at 680℃ for 500 h,the γ″ phase grows up obviously and forms a γ'/γ'' clad microstructure when the Zr addition is 0.03 wt.%.A large number of fine orbed γ' particles precipitate in the grains and some γ″ phase transforms to disk-like δ phase when the Zr addition increases to 0.05wt.%.The nano-polycrystalline γ' phase precipitates in the grains and there is a little δ phase when the Zr addition is 0.07wt.%.As the Zr addition increases,the amount of Laves phase at the grain boundary decreases at first,and then increases and forms flaky morphology. 关键词：K4169 superalloy PRECIPITATION ZR long time aging heat treatment

相关文献

参考文献（11）
引证文献（3）
耦合文献（40）

参考文献(11)

引证文献(3)

耦合文献(40)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Effect of Zr addition on precipitates in K4169 superalloy

参考文献(11)

引证文献(3)

耦合文献(40)

用户提示