摘要
在多晶铸造高温合金中加入铼并观察其铸态组织,发现在(γ+γ′)共晶附近有μ相和类树枝晶γ′相析出,测定合金中各种相的形成顺序和共晶反应偏析,分析了初生μ相和类树枝晶γ′相的形成机理,研究了Re在多晶铸造高温合金凝固过程中的作用和对合金凝固组织的影响.
The solidification behavior and as-cast microstructure feature of a nickel-base Recontaining superalloy for conventional casting have been investigated. The results show that because of the adding of Re, the （γ＋γ＇） eutectic temperature, MC carbide formation temperature and γ＇ precipitating temperature are increased, and the eutectic reaction segregation as well as solidification segregation is enhanced. There is a eutectic reaction segregation region around eutectic caused by eutectic forming. The pseudo-dendritic γ＇ precipitates form, resulting from latent heat of eutectic reaction and impact of Re in γ＇ precipitating temperature together.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2009年第1期98-102,共5页
Chinese Journal of Materials Research
关键词
金属材料
含铼多晶高温合金
凝固
共晶反应偏析
类树枝晶γ’相
metallic materials, Re-containing superalloy for CCs, solidification, eutectic reaction, pseudo-dendrite γ＇
