Reducing metals as a brazing flux

• US 6,858,050 B2
• Filed: 04/15/2003
• Issued: 02/22/2005
• Est. Priority Date: 02/20/2001
• Status: Expired due to Fees

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Palmgren, Gary M.
• Primary Examiner(s): Jones, Deborah
• Assistant Examiner(s): Savage, Jason L
• Application Number:
  US10/413,682
• Publication Number:
  US 20030201308A1
• Time in Patent Office: 679 Days
• Field of Search: 513/09, 512/95, 512/97, 228/120, 228/226, 228/122.1, 428/615, 428/621, 428/632, 428/685, 428/539.5
• US Class Current: 51/297
• CPC Class Codes: B23K 1/008 Soldering within a furnace B23K1/012 takes precedence
• CPC Class Codes: B23K 1/19 taking account of the properties of the materials to be soldered
• CPC Class Codes: B23K 35/001 Interlayers, transition pieces for metallurgical bonding of workpieces
• CPC Class Codes: B23K 35/0238 layered
• CPC Class Codes: Y10T 428/12535 with additional, spatially distinct nonmetal component
• CPC Class Codes: Y10T 428/12611 Oxide-containing component
• CPC Class Codes: Y10T 428/12736 Al-base component
• CPC Class Codes: Y10T 428/12979 Containing more than 10% nonferrous elements [e.g., high alloy, stainless]

Abstract

The present invention comprises a method of manufacturing a brazed body. The method comprises forming a multi-layer assembly comprising: a first material capable of forming a first oxide and having a melting temperature higher than 660° C.; a first reducing metal adjacent the first material, the reducing metal capable of reducing at least a portion of the first oxide on the first material a braze adjacent to the reducing metal; and a second material adjacent the braze, the second material comprising a material having a melting temperature higher than 660° C. The method then comprises creating a vacuum around the assembly, and heating the assembly to melt the reducing metal and the braze. The assembly is then subject to cooling to thereby form the brazed body.

Claims

1. An abrasive article comprising

(a) a first layer comprising a material having a melting temperature higher than 660°

C.;

(b) a second layer comprising a fused abrasive body; and

(c) a filler layer between the first layer and the second layers, the filler layer comprising a multi-phase alloy comprised of a braze and a reducing metal oxide.

2. The abrasive article of claim 1 wherein the fused abrasive body has a melting temperature higher than 660°

C.

3. The abrasive article of claim 1 wherein the first layer material is a metal.

4. The abrasive article of claim 3 wherein the metal is stainless steel.