Non-magnetic, strong carbide forming alloys for powder manufacture

Patent metadata

Field	Value
Publication number	US-10851444-B2
Application number	US-201615258710-A
Country	US
Kind code	B2
Filing date	Sep 7, 2016
Priority date	Sep 8, 2015
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

Disclosed herein are embodiments of non-magnetic, strong carbide forming alloys. In particular, the alloys can be advantageously used for powder manufacturing. Embodiments of the disclosure can have low FCC-BCC transition temperatures in combination with hard particles having a hardness of 1000 Vickers or greater. The alloys can be used in conjunction with, for example, drill pipe tool joints, drill collars, down hole stabilizers, or oilfield components, particularly as a hardbanding component.

First claim

What is claimed is:

1. An alloy comprising:
a matrix having a FCC-BCC transition temperature at or below 950K; and
extremely hard particles exhibiting a hardness of 1000 Vickers or greater, the extremely hard particles having:
an extremely hard particle fraction of 5 mole % or greater; and
an extremely hard particle melt range of 200K or less;

wherein the alloy comprises Fe and, in weight percent:
C: 2.25 to 4.95;
Cr: 9 to 18.15;
Mn: 7.65 to 15.95; and
V: 9.0 to 17.6.

2. The alloy of claim 1 , wherein the matrix comprises at least 7 mole % chromium.

3. The alloy of claim 1 , the alloy comprising:
at least 90% volume fraction austenite in the matrix;
a fraction of the extremely hard particles is 5 volume % or greater;
an ASTM G65 abrasion loss of 1.5 g or less;
a relative magnetic permeability of 1.03μ or lower; and
a corrosion resistance of 5 mpy or less in salt water according to ASTM G31;
wherein the matrix does not contain any extremely hard particles that begin to form at a temperature greater than 200K above a formation temperature of the matrix.

4. The alloy of claim 1 , further comprising, in weight percent:
V: 12.15 to 17.6.

5. The alloy of claim 1 , wherein the alloy is a powder.

6. The alloy of claim 1 , wherein a powder feedstock forming the alloy comprises Fe and, in weight %:
C: 3.0, Cr: 12.0, Mn: 12.0, V: 15.0;
C: 4.0, Cr: 16.0, Mn: 12.0, V: 15.0;
C: 4.0, Cr: 16.0, Mn: 13.4, V: 15.1;
C: 3.0, Cr: 12.1, Mn: 9.8, V: 14.9;
C: 3.8, Cr: 16.0, Mn: 13.7, V: 14.7;
C: 2.8, Cr: 12.5, Mn: 10.4, V: 15.3;
C: 3.9, Cr: 16.1, Mn: 14.0, V: 15.6;
C: 2.9, Cr: 12.1, Mn: 9.6, V: 14.4;
C: 2.6, Cr: 11.9, Mn: 11.6, V: 10.0; or
C: 2.6, Cr: 11.9, Mn: 8.5, V: 10.6.

7. A drill pipe tool joint, drill collar, down hole stabilizer or oilfield component used in directional drilling applications with the alloy of claim 1 applied as a hardfacing layer.

8. An alloy comprising:
Fe;
C: 2.25 to 4.95;
Cr: 9 to 18.15;
Mn: 7.65 to 15.95; and
V: 9.0 to 17.6
a matrix comprising at least 90% volume fraction austenite; and
extremely hard particles exhibiting a hardness of 1000 Vickers or greater, the extremely hard particles having a fraction of 5 volume % or greater;
wherein the matrix does not contain any extremely hard particles that begin to form at a temperature greater than 200K above a formation temperature of the matrix.

9. The alloy of claim 8 , wherein the matrix comprises at least 7 weight % chromium.

10. The alloy of claim 8 , further comprising, in weight percent:
V: 12.15 to 17.6.

11. The alloy of claim 8 , wherein the alloy is a powder.

12. The alloy of claim 8 , wherein a powder feedstock forming the alloy comprises Fe and, in weight %:
C: 3.0, Cr: 12.0, Mn: 12.0, V: 15.0;
C: 4.0, Cr: 16.0, Mn: 12.0, V: 15.0;
C: 4.0, Cr: 16.0, Mn: 13.4, V: 15.1;
C: 3.0, Cr: 12.1, Mn: 9.8, V: 14.9;
C: 3.8, Cr: 16.0, Mn: 13.7, V: 14.7;
C: 2.8, Cr: 12.5, Mn: 10.4, V: 15.3;
C: 3.9, Cr: 16.1, Mn: 14.0, V: 15.6;
C: 2.9, Cr: 12.1, Mn: 9.6, V: 14.4;
C: 2.6, Cr: 11.9, Mn: 11.6, V: 10.0; or
C: 2.6, Cr: 11.9, Mn: 8.5, V: 10.6.

13. A drill pipe tool joint, drill collar, down hole stabilizer or oilfield component used in directional drilling applications with the alloy of claim 8 applied as a hardfacing layer.

14. The alloy of claim 1 , wherein the alloy is a wire.

15. The alloy of claim 1 , wherein the alloy comprises 10.8 wt. % to 13 wt. % chromium.

16. The alloy of claim 1 , wherein the alloy comprises 9.4 wt. % to 12 wt. % chromium.

17. The alloy of claim 8 , wherein the alloy is a wire.

18. The alloy of claim 8 , wherein the alloy comprises 10.8 wt. % to 13 wt. % chromium.

19. The alloy of claim 8 , wherein the alloy comprises 9.4 wt. % to 12 wt. % chromium.

Assignees

• Oerlikon Metco Us Inc

Inventors

• Vecchio James
• Cheney Justin Lee

Classifications

• C22C37/08

  with nickel · CPC title

• C22C37/06

  containing chromium · CPC title

• C22C38/56

  with more than 1.7% by weight of carbon · CPC title

• C21D2211/001

  Austenite · CPC title

• C22C38/46

  with vanadium · CPC title