文档介绍：热处理对Ni。Al基单晶合金IC6SX组织和性能的影响 131 热处理对Ni3 Al基单晶合金IC6SX组织和性能的影响 Effect ofH eat Treatment on Microstructure and Stress Rupture Properties of aNi3 A1 Base Single Crystal Alloy IC6SX 李萍1,李树索1,韩雅芳1’2 (1北京航空航天大学,北京100191;2北京航空材料研究院,北京100095) LIPin91。LI Shu-su01,HAN Ya—fan91’2 (1Beij ingUniversity ofAeronautics and Astronautics, Beijing 100191,China;2 Beijing Institute ofAeronautical Materials,Beijing 100095,China) 摘要:研究了热处理对Ni。Al基单晶合金IC6SX的微观组织和持久性能的影响。实验结果表明:IC6SX单晶合金的铸态组织具有典型的树枝晶结构,由7’相、7相和NiMo相组成。合金经过1280℃/10h,风冷固溶处理后,7 7相全部固溶, 合金组织均匀,了’"m。合金在1340℃固溶处理后发生了少量的初熔。对固溶后的合金进行了870℃/ 32h,空冷的时效处理,’相。对不同状态的IC6SX单晶合金在1100℃/130MPa 条件下进行持久性能测试,结果表明,经过时效处理后的合金具有最长的持久寿命,高达120h。关键词:Ni3A1;单晶合金;热处理;显微组织;持久性能中图分类号: 文献标识码:A 文章编号:1001—4381(2009)Suppll-0131-05 Abstract:The effectofheat treatment on microstructures and stress rupture properties of aNi3 AIbase single crystal superalloy IC6SX has been investigated experimental results showed thatthisalloy as—cast exhibited atypical dendritic structure with three phases:7’,7 solution heat treatment at 1280℃for 10h。all ofthe7’phase dissolved and a uniform microstructure was small amount ofincipient melting occurred inthealloy aftersolution heat treatment at 1340"( was found that the sizes,morphologies and distributions of7’phase change greatly by theaging heat treatment of870℃/