Brazing Eutectic Composition
A solder joint eutectic is an alloy with a fixed melting point, leading to rapid liquefaction and flow. This improves filling accuracy and joint strength.
Physical-Chemical Mechanism of Action
A solder eutectic has a distinct melting point at which all components become liquid simultaneously. This prevents the occurrence of phases and leads to rapid melting and flow of the alloy structure.
Metallurgical Relevance & Welding Risks
A eutectic promotes precise filling of the braze gaps because it flows quickly and adapts well. This reduces the risk of porosity and improves the mechanical properties of the joint. However, too rapid cooling after melting can lead to a too hard structure, which impairs toughness.
Workshop Practice & Action Guidelines
Use solder eutectic for filling joints to achieve a precise and finely filled connection. Make sure the solder cools slowly after melting to get a softer structure. A typical cooling time is 10-20 seconds per cm³ of filling.