Alloy for cast iron repair

Patent metadata

Field	Value
Publication number	US-9975208-B1
Application number	US-201615380703-A
Country	US
Kind code	B1
Filing date	Dec 15, 2016
Priority date	Dec 15, 2016
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

An alloy for cladding cast iron is disclosed. The alloy may include on a weight basis, about 6.2% to about 9.3% of chromium (Cr), about 3.0% to about 4.5% of iron (Fe), about 1.4% to about 2.15% of silicon (Si), about 0.5% to about 0.8% of boron (B), about 0.1% of carbon (C), and a balance of nickel (Ni) and incidental impurities.

First claim

What is claimed is:

1. An alloy for cladding cast iron, comprising, on a weight basis:
Cr: 6.2-9.3 wt %,
Fe: 3.0-4.5 wt %,
Si: 1.4-2.1 wt %,
B: 0.5-0.8 wt %,
C: about 0.1 wt %, and
a balance of Ni and incidental impurities.

2. The alloy of claim 1 , wherein a hardness of the alloy ranges between Rockwell hardness of about HRC 25 to about HRC 40.

3. The alloy of claim 1 , wherein a melting point of the alloy ranges between about 980° C. and 1200° C.

4. The alloy of claim 1 , wherein Cr is about 7.75 wt %.

5. The alloy of claim 4 , wherein Fe is about 3.75 wt %.

6. The alloy of claim 5 , wherein Si is about 1.8 wt %.

7. The alloy of claim 6 , wherein B is about 0.7 wt %.

8. An alloy for cladding a cast iron substrate, comprising, on a weight basis:
Cr: about 7.75 wt %,
Fe: about 3.75 wt %,
Si: about 1.8 wt %,
B: about 0.7 wt %,
C: about 0.1 wt %, and
a balance of Ni and incidental impurities.

9. The alloy of claim 8 , wherein a hardness of the alloy ranges between Rockwell hardness about HRC 25 to about HRC 40.

10. A cast iron wheel, comprising:
a hub;
a flange extending from the hub; and
a cladding layer disposed on at least one worn out portion of the flange to repair the worn out portion, the cladding layer including an alloy having, on a weight basis:
Cr: 6.2-9.3 wt %,
Fe: 3.0-4.5 wt %,
Si: 1.4-2.1 wt %,
B: 0.5-0.8 wt %,
C: about 0.1 wt %, and
a balance of Ni and incidental impurities.

11. The wheel of claim 10 , wherein Cr in the alloy is about 7.75 wt %.

12. The wheel of claim 11 , wherein Fe in the alloy is about 3.75 wt %.

13. The wheel of claim 12 , wherein Si in the alloy is about 1.8 wt %.

14. The wheel of claim 13 , wherein B in the alloy is about 0.7 wt %.

15. The wheel of claim 10 , wherein a first hardness of the cladding layer is about equal to a second hardness of the cast iron at an interface of the cladding layer and the cast iron of the flange.

16. The wheel of claim 15 , wherein the first hardness and the second hardness ranges between Rockwell hardness about HRC 25 to about HRC 40.

17. The wheel of claim 15 , wherein there is little to no carbide formation at the interface of the cladding layer and the cast iron of the flange.

Assignees

• Caterpillar Inc

Inventors

• Chojnacki Tomasz J
• Efta Deven John
• Veliz Mark D

Classifications

• B21C33/004

  Composite billet · CPC title

• C22C19/00

  Alloys based on nickel or cobalt · CPC title

• B32B15/015

  the said other metal being copper or nickel or an alloy thereof · CPC title

• B60B3/06

  formed by casting · CPC title

• Y10T428/12993

  Surface feature [e.g., rough, mirror] · CPC title