Abstract
The brazing is a joint process between two or more metallic parts, by using a nonferrous filler metal, having a melting point below that of the Base Metal. The filler metal is distributed between the closely fitted surface of the joint by wettability and capillarity attraction.In the present work the filler metal (FM) was DIN 8513: L-Ag30Cd and the base metal (BM) was electrolytic Cu (Figure 1). In the rod of the filler metal the following phases were identified: αZn(Cu), ordered β’(CuZn) and brittle β(Cu2Cd). The larger part of the matrix was composed by βCd(Ag). In this research two brazed structures were studied, obtained in the same experimental conditions, with the single exception of the post-brazing cooling cycle. Probe I suffered a slow solidification process at room temperature. Probe II was rapidly cooled by immersion in cold water.Probe I. In order to estimate the thickness of the diffusion zone in the braze-metal interfaces the specimen was arranged with its joint clearance not completely refilled ( Fig.2). As it may be observed one clear gap between the affected zone and the unaltered base metal appears.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call