Heat Treatment of a Ni3Al-based Single Crystal Alloy IC32

摘要：

　　IC32 is a new type of Ni3Al-based single crystal alloy,which has been designed to serve at 1200℃.The effect of heat treatment on the microstructure of single crystal superalloy IC32 was investigated.The microstructure after heat treatment under different solution and aging temperature was examined by using optical microscope (OM),scanning electron microscopy(SEM) and electron probe microscopic analyzer (EPMA).The as-cast microstructure of IC32 consisted of a two-phase γ/γ′ microstructure,and primary bulky γ′ phase which priciptated in the interdendritic region.The incipient melting temperature of IC32 is 1360℃,and the heat treatment window is about 40℃.Considering high contents of refractory elements Re and Ta,a complicated 18 hours solution heat treatment at different temperatures was conducted to elimate the segregation and dissolove the primary bulky γ′ phase.The optimum heat treatment of IC32 alloy is 1325℃/4h+1335℃/4h+1345℃ /10h,ac + 1165℃/2h,ac + 870℃/32h,ac.

关键词： Ni3Al-based single crystal alloy:Heat treatment:Microstructure

作者: Dongliang Cui Xiaoying Xie Shusuo Li Heng Zhang Shengkai Gong

作者单位: School of Materials Science and Engineering, Beihang University, Beijing 100191, China

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 665-671

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）