# US 2020/0399740 A1 · High-performance metal alloy for additive manufacturing of machine components

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- Number: US 2020/0399740 A1
- Document ID: US20200399740A1
- Status: Published application
- Kind: A1
- Application number: 17/014,361
- Filed: 2020-09-08
- Published: 2020-12-24
- Earliest claimed: 2018-03-15
- Assignees: Nuovo Pignone Tecnologie Srl
- Applicants: Nuovo Pignone Tecnologie - S.r.l.
- Inventors: Antonella DIMATTEO; Iacopo GIOVANNETTI
- Web page: https://patentgrep.com/patent/US20200399740A1

## CPC

- C22C 19/07: based on cobalt
- B33Y 10/00: Processes of additive manufacturing
- B33Y 70/00: Materials specially adapted for additive manufacturing
- B33Y 80/00: Products made by additive manufacturing
- C22C 1/02: by melting {(C22C1/1036 takes precedence)}
- F01D 5/28: Selecting particular materials; {Particular measures relating thereto;} Measures against erosion or corrosion
- F01D 9/041: {using blades (F01D5/148 takes precedence)}
- B22F 5/009: {of turbine components other than turbine blades (of turbine blades B22F5/04)}
- F05D 2220/3212: the first stage of a turbine
- F05D 2230/22: by sintering
- F05D 2230/234: Laser welding
- F05D 2230/31: Layer deposition
- F05D 2300/175: Superalloys
- Y02P 10/25: Process efficiency
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A high-performance metal alloy is disclosed being suitable for additive manufacturing of machine components, in particular machine components which are subjected to high gas temperature stress. Exemplary machine components are statoric components of gas turbines, such as nozzles.

## Claims

### Claim 1

A high-performance metal alloy having a nominal composition consisting of:
O
up to 0.1 wt %
N
up to 0.03 wt %
S
less than 0.004 wt %
C
up to 0.20 wt %
Mn
0.6-1.4 wt %
Si
0.76-2.0 wt %
P
less than 0.05 wt%
Cr
25-35 wt %
Ni
10.6-15.6 wt %
W
2-10 wt %
Fe
0.3-0.9 wt %
Ta
less than 0.04 wt %
B
less than 0.008 wt %
Cu
less than 0.02 wt %
Zr
less than 0.003 wt %
Co
balance, based on
the alloy weight.

### Claim 2 (depends on 1)

The high-performance metal alloy of claim 1, wherein C is present in an amount up to 0.15 wt %, preferably in an amount up to 0.10 wt %, more preferably in an amount of 0.001-0.07 wt %.

### Claim 3 (depends on 1)

The high-performance metal alloy of claim 1, wherein B is present in an amount less than 0.004 wt %.

### Claim 4 (depends on 1)

The high-performance metal alloy of claim 1, wherein N is present in an amount of 0.001-0.025 wt %.

### Claim 5 (depends on 1)

The high-performance metal alloy of claim 1, wherein Mn is present in an amount of 0.6-1.0 wt %.

### Claim 6 (depends on 1)

The high-performance metal alloy of claim 1, wherein Si is present in an amount of 0.8-1.5 wt %.

### Claim 7 (depends on 1)

The high-performance metal alloy of claim 1, wherein Ni is present in an amount of 10.8-13.5 wt %.

### Claim 8 (depends on 1)

The high-performance metal alloy of claim 1, wherein Fe is present in an amount of 0.4-0.8 wt %.

### Claim 9 (depends on 1)

The high-performance metal alloy of claim 1, having a nominal composition consisting of:
O
up to 0.1 wt %
N
0.001-0.025 wt %
S
less than 0.004 wt %
C
0.001-0.07 wt %
Mn
0.6-1.0 wt %
Si
0.8-1.5 wt %
P
less than 0.05 wt %
Cr
25-35 wt %
Ni
10.8-13.5 wt %
W
2-10 wt %
Fe
0.4-0.9 wt %
Ta
less than 0.04 wt %
B
less than 0.004 wt %
Cu
less than 0.02 wt %
Zr
less than 0.003 wt %
Co
balance, based on
the alloy weight.

### Claim 10 (depends on 9)

The high-performance metal alloy of claim 9, having a nominal composition consisting of:
O
0.01-0.05 wt %
N
0.005-0.025 wt %
S
less than 0.003 wt %
C
0.005-0.07 wt %
Mn
0.6-0.8 wt %
Si
0.8-1.0 wt %
P
less than 0.04 wt %
Cr
27-33 wt %
Ni
11-12 wt %
W
5-9 wt %
Fe
0.4-0.7 wt %
Ta
less than 0.001 wt %
B
less than 0.003 wt %
Cu
less than 0.001 wt %
Zr
less than 0.003 wt %
Co
balance, based on
the alloy weight.

### Claim 11 (depends on 10)

The high-performance metal alloy of claim 10, having a nominal composition consisting of:
O
0.036 wt %
N
0.024 wt %
S
less than 0.003 wt %
C
0.009 wt %
Mn
0.71 wt %
Si
0.91 wt %
P
less than 0.04 wt %
Cr
29.76 wt %
Ni
11.04 wt %
W
6.98 wt %
Fe
0.55 wt %
Ta
less than 0.001 wt %
B
less than 0.003 wt %
Cu
less than 0.001 wt %
Zr
less than 0.003 wt %
Co
balance, based on
the alloy weight.

### Claim 12 (depends on 10)

The high-performance metal alloy of claim 10, having a nominal composition consisting of:
O
0.026 wt %
N
0.007 wt %
S
less than 0.003 wt %
C
0.039 wt %
Mn
0.71 wt %
Si
0.91 wt %
P
less than 0.04 wt %
Cr
29.73 wt %
Ni
11.05 wt %
W
6.98 wt %
Fe
0.54 wt %
Ta
less than 0.001 wt %
B
less than 0.003 wt %
Cu
less than 0.001 wt %
Zr
less than 0.003 wt %
Co
balance, based on
the alloy weight.

### Claim 13 (depends on 1)

The high-performance metal alloy of claim 1, obtainable by an additive manufacturing process selected from electron beam melting (EBM), selective laser melting (SLM), selective laser sintering (SLS), laser metal forming (LMF), direct metal laser sintering (DMLS), and direct metal laser melting (DMLM).

### Claim 14 (depends on 1)

A gas turbine component, said component being a nozzle, made of the alloy of claim 1.