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Browse Prior Art Database

Collapsed Pin Fillet Repair

IP.com Disclosure Number: IPCOM000046044D
Original Publication Date: 1983-May-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Palmateer, PH: AUTHOR

Abstract

During the course of multiple heat treatments, the brazed joint between a pin and a substrate may collapse so that the joint is weakened and the product must be scrapped. Disclosed herein is a method for repairing a collapsed pin joint by positioning a washer element about the pin head, and heating to melt and reflow the washer.

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Collapsed Pin Fillet Repair

During the course of multiple heat treatments, the brazed joint between a pin and a substrate may collapse so that the joint is weakened and the product must be scrapped. Disclosed herein is a method for repairing a collapsed pin joint by positioning a washer element about the pin head, and heating to melt and reflow the washer.

Fig. 1 illustrates a pin 1 which is connected to a substrate 2 by a braze joint 3, typically formed of an alloy of 80% Au and 20% Sn. In Fig. 1, braze joint 3 has collapsed as a result of multiple heat treatments.

As illustrated in Fig. 2, the collapsed joint is repaired by positioning a washer 4 on the pin head. Preferably, the washer is made of the same braze material used in the joint. The structure is then heated to melt and reflow the washer, and form a strengthened pin braze joint 5, as illustrated in Fig. 3.

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