NI-BASED SINGLE CRYSTAL SUPERALLOY AND TURBINE BLADE

摘要

The present invention provides a Ni-based single crystal superalloy which hasthefollowing composition by weight: 0.1 wt% or more and 9.9 wt% or less of Co,5.1 wt% ormore and 10.0 wt% or less of Cr, 1.0 wt% or more and 4.0 wt% or less of Mo,8.1 wt% ormore and 11.0 wt% or less of W, 4.0 wt% or more and 9.0 wt% or less of Ta, 5.2wt% ormore and 7.0 wt% or less of Al, 0.1 wt% or more and 2.0 wt% or less of Ti,0.05 wt% ormore and 0.3 wt% or less of Hf, 1.0 wt% or less of Nb and less than 3.0 wt% ofRe withthe remainder including Ni and unavoidable impurities. This Ni-based singlecrystalsuperalloy has a low Re content and also has excellent high-temperaturestrength, mainlycreep strength.