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Welding of Electroless Nickel Plated Parts

IP.com Disclosure Number: IPCOM000090555D
Original Publication Date: 1969-May-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Goodrich, RA: AUTHOR

Abstract

This process meets a requirement that electroless nickel-plated parts be joined without adversely affecting the plated component or its corrosion protection. The problems encountered during the welding of low carbon components which are electroless nickel-plated are brittleness of the resultant weld. Such is caused by the phosphorous present in this type of plating material and the compromising of the corrosion protection of the components and welded joint.

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Welding of Electroless Nickel Plated Parts

This process meets a requirement that electroless nickel-plated parts be joined without adversely affecting the plated component or its corrosion protection. The problems encountered during the welding of low carbon components which are electroless nickel-plated are brittleness of the resultant weld. Such is caused by the phosphorous present in this type of plating material and the compromising of the corrosion protection of the components and welded joint.

The procedure utilizes a MIG spray arc power supply, gun, and wire feed unit which supplies a shielding gas. The shielding gas used is an argon-oxygen mixture containing 1 to 5 percent oxygen. The procedure deviates from conventional MIG spray arc welding in the use of a rate of wire feed which is 50 to 100% greater than that indicated in normal practice. This elevated feed rate increases the amperage and the amount of heat generated per unit time, but the increase in the welding rate results in a significant reduction in joule input per inch of weld.

The procedure is directed to short welds such as those 1 to 2 inches in length. The weld arc has a harsh start and is initiated at an intermediate location along the length of the weld. The gun is held in a plane through the axis of the weld and bisecting the angle between the component surfaces being joined and inclined at an angle of about 20 to 30 degrees away from the direction of travel to cause the gas shielding en...