γ, γ′ cobalt based alloys for additive manufacturing methods or soldering, welding, powder and component

1. A cobalt-based superalloy,

for additive manufacturing processes, soldering or welding,

which comprises in percent by weight:

7% of tungsten (W),

7% of aluminum (Al),

21%-23% of nickel (Ni),

2.5%-3% of titanium (Ti),

1%-3% of tantalum (Ta),

10%-14% of chromium (Cr),

0.010%-0.015% of boron (B), and

0.10%-0.15% of carbon (C).

2. A powder comprising the cobalt-based superalloy as claimed in claim 1 .

3. A component comprising at least the cobalt-based superalloy as claimed in claim 1 .

4. A process for heat treatment, in particular for the cobalt-based superalloy as claimed in claim 1 , wherein the alloy is subjected to at least a two-stage heat treatment:

solution heat treatment at 1573° K,

γ′ precipitation at 1173° K and

then the grain boundary carbide precipitation at 1073° K and a concluding aging heat treatment to precipitate grain boundary strengtheners.

5. A process for heat treatment, in particular for the cobalt-based superalloy as claimed in claim 1 ,

wherein the alloy is subjected to a solution heat treatment and precipitation of γ′ in an at least a two-stage heat treatment 1423° K and 1193° K

at the end optionally a heat treatment at 1073° K for boride precipitation.

6. The cobalt-based superalloy,

for additive manufacturing processes, soldering or welding, of claim 1

which comprises in percent by weight:

7% of tungsten (W),

7% of aluminum (Al),

23% of nickel (Ni),

2.5% of titanium (Ti),

2% of tantalum (Ta),

12% of chromium (Cr),

0.010% of boron (B), and

0.10% of carbon (C).

7. The cobalt-based superalloy,

for additive manufacturing processes, soldering or welding, of claim 1

which comprises in percent by weight:

0.05%-0.15% of silicon (Si).

8. The cobalt-based superalloy,

for additive manufacturing processes, soldering or welding, of claim 7

which comprises in percent by weight:

0.10% of silicon (Si).