| 摘要 |
Alloy compositions for nickel-base superalloys having the qualities of weldability, castability and foregeability together with improved high temperature strength and rupture properties are disclosed. The weldability is improved by varying the Al, Ti, Nb and Ta content so as to insure that only the favorable gamma '' precipitates are formed in the alloy. The high temperature properties of the alloy compositions are optimized by controlling the content of the major alloying elements Co and Cr. The alloy contains, in wt.%:- Cr 12 - 24 Co 5 - 20 Mo/W/Rh 1 - 8 Ta 2 - 23 Nb - 10.5 Al - 2.7 Ti - 3.7 B 0.003 - 0.05 C - 0.1 Zr - 0.1 Fe - 5 Si - 0.5 Mn - 0.5 Ni balance. a |
