Primary Austenite Dendrite
The primary austenite dendrite forms as the first crystal in the liquid melt phase and has a face-centered cubic lattice. It is typical for unalloyed and low-alloy steels.
Physical-Chemical Mechanism of Action
The primary austenite dendrite forms as the liquid melt solidifies during cooling. It has a face-centered cubic lattice and forms a mixed crystal tree with various steel constituents.
Metallurgical Relevance & Welding Risks
The primary austenite dendrite plays an important role in the strength and mechanical properties of the steel. However, an excessive number or overly large dendrites can lead to poor toughness, affecting service life and behavior under load.
Workshop Practice & Action Guidelines
To ensure optimal primary austenite dendrite formation, it is important to control melt temperature and cooling rate. Too fast cooling can result in a fine dendrite structure, while too slow cooling leads to large dendrite formation and poor toughness.