Ni—Al base material having optimized oxidation resistant at high temperatures and furnace transfer rolls made therefrom

Patent metadata

Field	Value
Publication number	US-11060169-B2
Application number	US-201313738257-A
Country	US
Kind code	B2
Filing date	Jan 10, 2013
Priority date	Jan 10, 2012
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

Abstract

A high temperature oxidation resistant nickel-aluminide alloy composition and furnace rolls formed therefrom. The inventive nickel-aluminide alloy composition comprises 0.08-0.1 wt. % Zr, 2.5-3.0 wt. % Mo, 7.5-8.5 wt. % Al, 7.5-8.5 wt. % Cr, about 0.01 wt. % B and the balance being substantially nickel.

First claim

What is claimed:

1. A nickel-aluminide ahoy comprising:
0.15 wt % or less Zr{circumflex over ( )}
2.5 to 3.0 wt. % Mo;
7.5 to 8.5 wt. % Cr; and
7.5 to 8.5 wt. % Al; and the balance being Ni.

2. The nickel-aluminide alloy of claim 1 , wherein said Zr ranges from about 0.08 to 0.1 wt %.

3. The nickel-aluminide alloy of claim 1 , wherein said ahoy comprises about 2.8 wt % Mo.

4. The nickel-aluminide alloy of claim 1 , wherein said alloy further comprises about 0.015 wt. % B or less.

5. The nickel-aluminide alloy of claim 4 , wherein said alloy further comprises about 0.01 wt. % B.

6. The nickel-aluminide alloy of claim 1 , wherein said alloy further comprises in wt. %: C—0.05 max; Si—0.1 max; Fe—0.3 max; S—0.005 max; Mn—0.1 max; P—0.01 max; and Cu—0.3 max.

7. The nickel-aluminide alloy of claim 6 , wherein said alloy contains no more than trace amounts of the other elements from group IVB, VB and VIB of the periodic table.

8. A furnace roll comprising: a Cast roll of a nickel-aluminide alloy comprising:
0.15 wt % or less Zr
2.5 to 3.0 wt. % Mo;
7.5 to 8.5 wt. % Cr; and
7.5 to 8.5 wt. % Al; and the balance being Ni.

9. The furnace roll of claim 8 , wherein said Zr ranges from about 0.08-0.1 wt %.

10. The furnace roll of claim 8 , wherein said alloy further comprises about 2.8 wt % Mo.

11. The furnace roll of claim 8 , wherein said alloy further comprises from about 0.015 wt. % B or less.

12. The furnace roll of claim 11 , wherein said alloy further comprises about 0.01 wt. % B.

13. The furnace roll of claim 8 , wherein said alloy further comprises in wt. %: C—0.05 max; Si—0.1 max; Fe—0.3 max; S—0.005 max; Mn—0.1 max; P—0.01 max; and Cu—0.3 max.

14. The furnace roll of claim 13 , wherein said alloy contains no more than trace amounts of the other elements from group IVB, VB and VIB of the periodic table.

15. The furnace roll of claim 8 , further comprising a protective Al 2 O 3 layer after oxidation.

16. The furnace roll of claim 8 , wherein after oxidation, NiO nodules are not present.

17. A nickel-aluminide ahoy comprising:
0.15 wt % or less Zr
2.5 to 3.0 wt. % Mo;
7.5 to 8.5 wt % Cr; and
7.5 to 8.5 wt % Al; and the balance being Ni,
wherein the alloy contains no more than trace amounts of the other elements from group IVB, VB and VIB of the periodic table.

18. A furnace roll for comprising: a cast roll of a nickel-aluminide alloy comprising:
0.15 wt. % or less Zr
2.5 to 3.0 wt. % Mo;
7.5 to 8.5 wt. % Cr; and
7.5 to 8.5 wt. % Al; and the balance being Ni,
wherein the alloy contains no more than trace amounts of the other elements from group IVB, VB and VIB of the periodic table.

19. The furnace roll of claim 8 , further comprising:
a continuous protective layer of Al 2 O 30 n a surface of the nickel-aluminide alloy after oxidation of the furnace roll.

20. The furnace roll of claim 8 , wherein NiO nodules do not form on a surface of the nickel-aluminide alloy during oxidation of the furnace roll.

Assignees

• Arcelormittal
• ArcelorMital

Inventors

• Yanez Tanya Ros
• De Amar Kumar

Classifications

• C22C19/057 Primary

  with the maximum Cr content being less 10% · CPC title

• C22C19/007

  with a light metal (alkali metal Li, Na, K, Rb, Cs; earth alkali metal Be, Mg, Ca, Sr, Ba, Al Ga, Ge, Ti) or B, Si, Zr, Hf, Sc, Y, lanthanides, actinides, as the next major constituent · CPC title