EML2322L-Soldering and Brazing

EML2322L-Soldering and Brazing - EML 2322L - MAE Design and...

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EML 2322L -- MAE Design and Manufacturing Laboratory Soldering and Brazing Soldering and brazing are liquid-solid phase bonding processes . Liquid means that the filler metal is melted; solid means that the base material(s) are not melted. The phase is the state at which bonding takes place between the solid base material and the liquid filler material. The bond between the base material and filler metal is a metallurgical bond because no melting or alloying of the base metal occurs . If done correctly, this bond results in a joint having 2 or 3 times the tensile strength of the filler metal itself. Soldering and brazing differ only in that soldering takes place at a temperature below 840°F and brazing occurs at a temperature above 840°F. In brazing, the parts being joined must be fitted so that the joint (gap) spacing is very small ( less than 0.025” ). This small spacing allows a capillary action to draw the filler metal into the joint when the parts reach the proper temperature. ( Capillary action is the result of adhesion and surface tension. Adhesion of water to the walls of
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EML2322L-Soldering and Brazing - EML 2322L - MAE Design and...

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