| 摘要 |
<p>A Ni—Co alloy includes 30 to 65 wt % Ni, >0 to max. 10 wt % Fe, >12 to <35 wt % Co, 13 to 23 wt % Cr, 1 to 6 wt % Mo, 4 to 6 wt % Nb+Ta, >0 to <3 wt % Al, >0 to <2 wt % Ti, >0 to max. 0.1 wt % C, >0 to max. 0.03 wt % P, >0 to max. 0.01 wt % Mg, >0 to max. 0.02 wt % B, >0 to max. 0.1 wt % Zr, which fulfils the following requirements and criteria: a) 900° C.<γ′solvus temperature<1030° C. with 3 at %<Al+Ti (at %)<5.6 at % and 11.5 at %<Co<35 at %; b) stable microstructure after 500 h of ageing annealing at 800° C. with a ratio Al/Ti>5 (on the basis of the contents in at %).</p> |
