航空材料学报2017，Vol.37Issue(3)：9-15,7.DOI:10.11868/j.issn.1005-5053.2016.000126
C含量对第二代单晶高温合金组织的影响
Effect of C Content on Microstructure of Second Generation Single Crystal Superalloy
刘世忠 1史振学 1李嘉荣1
作者信息
- 1. 北京航空材料研究院 先进高温结构材料重点实验室, 北京 100095
- 折叠
摘要
Abstract
The single crystal superalloy with different C contents was casted using master alloy of DD6 in the directionally solidified furnace.The effect of C content on the microstructure of the second generation single crystal superalloy was investigated.The results show that C content has no obvious effect on the dendrite arm spacing.With the increase of C content,the volume fraction and size of γ/γ′ eutectic decrease.However,the volume fraction of carbide increases,and its morphologies change from blocky shape to frame work-like and Chinese-script-like with the increase of C content.With the increase of carbon content,the segregation of Ta decreases while the segregation of Re,W,Mo,Nb increases.C content has no obvious effect on the shape and size of γ′ phase in as cast microstructure or after heat treatment.The morphology of carbide has no distinct change after heat treatment.关键词
单晶高温合金/C含量/组织Key words
single crystal superalloy/C content/microstructure分类
矿业与冶金引用本文复制引用
刘世忠,史振学,李嘉荣..C含量对第二代单晶高温合金组织的影响[J].航空材料学报,2017,37(3):9-15,7.
