Molybdenum-silicon-boron alloy and method for producing same, and component

Patent metadata

Field	Value
Publication number	US-10865467-B2
Application number	US-201615573398-A
Country	US
Kind code	B2
Filing date	Apr 27, 2016
Priority date	May 26, 2015
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

The use of a specific molybdenum-silicon-boron alloy and a particular production process in which powder is used makes it possible to achieve components which have a particular fiber-matrix structure and can be used for high-temperature applications and can also be produced inexpensively.

First claim

The invention claimed is:

1. An alloy comprising a composition Mo-(x)Si-(y)B-(z)Zr, wherein:
x=13 at % to 18 at %,
y=8 at % to 12 at %, and
z=0.5 at % to 2 at %.

2. An alloy consisting essentially of the composition as claimed in claim 1 .

3. The alloy as claimed in claim 1 , consisting essentially of Mo, Si, B and Zr and formed by a selective laser melting process such that the alloy comprises a fiber-matrix structure in which individual phases are present as a Mo ss /Mo 5 SiB 2 /Mo 3 Si structure.

4. A component comprising the alloy as claimed in claim 1 , wherein the alloy further comprises a fiber-matrix structure formed by an energy beam melting process.

5. A process for producing a component composed of the alloy of claim 1 , the process comprising applying powder comprising Mo, Si, B and Zr with a selective energy beam melting process.

6. The process as claimed in claim 5 , wherein at least 80%, of particles of the powder have respective sizes in a range from 10 μm to 60 μm.

7. The process as claimed in claim 5 , wherein the powder has been gas-atomized or milled.

8. The process as claimed in claim 5 , wherein the selective energy beam melting process is controlled to achieve a temperature gradient effective to form a fiber-matrix structure.

9. A component formed by the process of claim 8 .

10. The process of claim 8 , further comprising controlling the selective energy beam melting process to achieve a temperature gradient effective to form the fiber-matrix structure in which individual phases are present as Mo ss /Mo 5 SiB 2 /Mo 3 Si.

11. A component formed by the process of claim 10 .

12. The process of claim 8 , wherein a scanning speed between the powder and a laser energy beam is between 400 mm/s and 2000 mm/s.

13. The process of claim 12 , wherein the scanning speed is between 1000 mm/s and 1500 mm/s.

14. The process of claim 8 , wherein the selective energy beam melting process utilizes a laser energy beam power of from 80 W to 250 W.

15. The process of claim 14 , wherein the selective energy beam melting process utilizes a laser energy beam power of from 100 W to 170 W.

Assignees

• Siemens Ag

Inventors

• Ott Michael
• Piegert Sebastian

Classifications

• B22F10/28

  Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] · CPC title

• B22F10/36

  of energy beam parameters · CPC title

• Y02P10/25

  Process efficiency · CPC title

• C22C27/04 Primary

  Alloys based on tungsten or molybdenum · CPC title

• C22C49/10 Primary

  Refractory metals · CPC title