摘要
利用Thermo-Calc热力学计算软件,对K488合金平衡相和合金元素对析出相的影响规律进行了计算和实验两方面的分析。计算和实验结果均表明:合金的平衡相主要有γ、γ'、σ、碳化物,合金凝固过程中Mo,Ti偏析比较严重;随着C和Nb含量的增加,MC的析出量增加而析出温度降低,Ti元素则相反;Al、Ti元素含量的增加,γ'相析出量和析出温度逐渐增加;Cr含量对σ相的析出量和析出温度影响最大;计算和实验结果具有较好的一致性。
The influence of equilibrium and alloy elements on the precipitation phases of K488 alloy was calculated and experimental analyzed by using Thermo-Calc thermodynamic calculation software. The results of calculation and experiment are shown that the alloy equilibrium phases are γ,γ＇,σ and carbides. In the alloy solidification process,Mo,Ti segregations are more serious. With the increase of C and Nb content,MC precipitation increased,but precipitation temperature decreased,the content of Ti is on the contrary.the increase of Al,Ti contents,γ＇ phase precipitations amount and precipitation temperature gradually increased. The content of Cr has most influence on the precipitation amount and precipitation temperature of the sigma phase. The calculation and experimental results have good consistency.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2018年第1期40-46,共7页
Journal of Aeronautical Materials
关键词
K488合金
平衡相图
析出量
析出温度
K488 alloy
equilibrium phase diagram
precipitation amount
precipitation temperature
