Re及时效时间对耐腐蚀镍基定向合金组织和持久寿命的影响  

Effect of Re and Aging Time on Microstructure and Stress Rupture Life of Corrosion Resistance Directionally Solidified Ni-base Superalloy

作　　者：杨海青[1] 李青[1] 肖程波[1] 胡聘聘[1] 林山峰 

机构地区：[1]北京航空材料研究院先进高温结构材料重点实验室 [2]中国人民解放军61267部队

出　　处：《材料工程》2015年第6期31-37,共7页Journal of Materials Engineering

基　　金：国防基础科研项目(A0520133013);国家863计划(2012AA03A511)

摘　　要：优化设计了三种含Re分别为0%,2%,3%(质量分数)的耐腐蚀定向镍基高温合金,分析了三种合金在900℃高温时效过程中组织的变化,测试了三种合金在不同时效时间980℃/200MPa下的持久寿命。结果表明:随着Re含量和时效时间的增加,合金析出σ相的倾向增大,合金高温持久性能下降;Re明显细化持久性能试样的筏排结构,随着Re含量的增加,合金性能下降的幅度变小。Three corrosion resistance directionally solidified Ni-base superalloys with varying mass fraction of Re （0％,2％ and 3％,respectively） were optimally designed,microstructural evolution during high temperature aging at 900℃ was analyzed and the stress rupture life of three alloys was tested at 980℃/200MPa after different aging time.The results show that the tendency of σ phase precipitating grows and the high temperature rupture performance of the alloy decreases due to the increase of Re content and the aging time.The rafting structure of stress rupture specimen,which is obviously refined with the addition of Re,as Re content increases,the decrease of stress rupture performance becomes smaller.

关 键 词：RE 耐腐蚀合金 高温时效 组织 持久寿命 

分 类 号：TG142.2[一般工业技术—材料科学与工程]