Self-adjusting welding wire for welding application

A self-adjusting, welding wire technology used in the field of alignment of materials and objects
CN103817455AInactive Publication Date: 2014-05-28GM GLOBAL TECH OPERATIONS LLC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GM GLOBAL TECH OPERATIONS LLC
Publication Date
2014-05-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a self-adjusting welding wire for welding application, and particularly discloses a self-adjusting welding wire, a method for manufacturing the self-adjusting welding wires, a heating bonding process (such as gas metal arc welding or laser beam braze welding) and other processes using the self-adjusting welding wires. The welding wire is provided with a metal or metal alloy core suitable for serving as a bonding material in the bonding process and an outer layer of shape memory alloy, and the outer layer such as one or multiple longitudinal straps can encircle the external portion of the core continuously or discontinuously. The shape memory alloy of the self-adjusting welding wire is 'trained' to be in a straight welding wire shape in austenite. In the processes using the self-adjusting welding wires, bent end portions of the self-adjusting welding wires are straightened by heating the self-adjusting welding wires to the temperature higher than the austenite phase transition temperature of the shape memory alloy.
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Description

technical field

[0001] The present invention relates to methods of welding and joining and materials and articles for use in such methods. In another aspect, the present invention relates to procedures relating to alignment of welding wires and the like. Background technique

[0002] This section provides information that may be helpful in understanding the present invention but is not necessarily prior art.

[0003] Gas metal arc welding (GMAW), often also referred to as metal inert gas (MIG) welding, is an arc welding process using a continuous, consumable welding or filler wire as the electrode. In metal inert gas arc welding, a consumable wire electrode made of a conductive metal such as a copper alloy is passed through the welding torch or torch and out of the torch contact tip. An electrical potential applied between the contact tip and the metal workpiece to be welded results in a current in the wire that supports the arc between the wire end and the metal workpiece...

Claims

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