摘要
用金相显微镜和扫描电镜研究了镍基高温合金K465在1530-1540℃下进行1-10min熔体处理后碳化物尺寸、分布以及枝晶杆区γ'相尺寸、形态立方化效果的变化,并研究了其对合金室温拉伸性能和高温持久性能的影响。结果表明,熔体处理5-7min能减小碳化物和枝晶杆区γ'相尺寸,改善碳化物分布和γ'相立方化程度,而使合金得到良好的室温塑性和高温持久性能。
The changes of size, distribution and morphology of carbides and γ′ phases in Ni-based superalloy K465 after 1-10 min melt treatment were investigated by optical metallography and scanning electron microscopy. The tensile properties at RT and high temperature stress rupture properties of alloy K465 were carried out to evaluate the effect of melt treatment. The results show that the size of carbides and γ′ phases in dendritic areas can be decreased by melt treatment. The good comprehensive properties can be achieved by the melt treatment of 5-7 min by improving the homogeneity distribution of carbides and cubic effect of γ′ phases in dendritic areas.
出处
《航空材料学报》
EI
CAS
CSCD
2005年第1期1-4,共4页
Journal of Aeronautical Materials
关键词
熔体处理
NI基合金
组织结构
力学性能
等轴晶镍基铸造
航空材料
High temperature properties
Mechanical properties
Metal casting
Metal melting
Metallographic microstructure
Nickel alloys
Optical microscopy
Scanning electron microscopy
Tensile properties
