Amorphous ductile braze alloy compositions, and related methods and articles

Patent metadata

Field	Value
Publication number	US-12428713-B2
Application number	US-202318454365-A
Country	US
Kind code	B2
Filing date	Aug 23, 2023
Priority date	Dec 23, 2016
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

A nickel-based braze alloy composition is described, including nickel, about 1 weight % to about 5 weight % boron (B); and about 1 weight % to about 20 weight % germanium (Ge). The composition is free of any silicon. Superalloy articles that contains a crack or other type of void or gap filled with the nickel-based braze alloy composition are also described, along with methods for filling such a gap. Related articles of manufacture and brazing processes to join metal components are also disclosed.

First claim

What is claimed:

1. A method for joining a first metal component to a second metal component by brazing, the method comprising:
introducing a braze alloy composition between the first metal component and the second metal component, wherein the braze alloy composition consists of:
at least 40 weight % nickel;
1 weight % to 5 weight % boron;
7 weight % to 15 weight % chromium;
1 weight % to 20 weight % germanium; wherein said braze alloy composition is free of silicon, hafnium, and zirconium; and
optionally, at least one element selected from 0.5 weight % to 40 weight % cobalt, 0.05 weight % to about 10 weight % gold, 0.01 weight % to 0.2 weight % carbon, 0.01 weight % to 0.2 weight % yttrium, 5 weight % to 28 weight % manganese, 0.5 weight % to 8 weight % iron, 0.5 weight % to 8 weight % niobium, 0.5 weight % to 8 weight % tantalum, 0.5 weight % to 8 weight % molybdenum, 0.5 weight % to 8 weight % tungsten, or combinations thereof; and

heating the first metal component, the second metal component, and the braze alloy composition to form a braze joint between the first metal component and the second metal component.

2. The method of claim 1 , wherein 14 weight % to 15 weight % of chromium is present in the braze alloy composition.

3. The method of claim 1 , wherein 0.5 weight % to 30 weight % of cobalt is present in the braze alloy composition.

4. The method of claim 1 , wherein 1 weight % to about 7 weight % of gold is present in the braze alloy composition.

5. The method of claim 1 , wherein at least one element selected from 0.01 weight % to 0.2 weight % carbon or 0.01 weight % to 0.2 weight % yttrium is present in the braze alloy composition.

6. The method of claim 1 , wherein 1 weight % to 3.4 weight % of boron is present in the braze alloy composition.

7. The method of claim 1 , wherein 2 weight % to 18 weight % of germanium is present in the braze alloy composition.

8. The method of claim 1 , wherein an atomic ratio of manganese to germanium is greater than 1.1:1.0.

9. The method of claim 1 , wherein the braze alloy composition has an amorphous microstructure.

10. The method of claim 1 , wherein the braze alloy composition is free of aluminum.

11. The method of claim 1 , wherein the braze alloy composition is free of palladium.

12. The method of claim 1 , wherein the braze alloy composition has a melting point of 870° C. to 1260° C.

Assignees

• Gen Electric

Inventors

• Adharapurapu Raghavendra Rao
• Gigliotti Jr Michael Francis Xavier
• Budinger David Edwin
• Subramanian Pazhayannur Ramanathan
• Schoonover Jeffrey Jon

Classifications

• B23K2101/00

  Articles made by soldering, welding or cutting · CPC title

• F05D2300/175

  Superalloys · CPC title

• F01D5/005

  Repairing methods or devices · CPC title

• F05D2230/80

  Repairing, retrofitting or upgrading methods · CPC title

• B23K2103/08

  Non-ferrous metals or alloys · CPC title