Fusion weldability
Fusion weldability is the ability of a metal to create a crack-free and ductile joint during fusion welding. It depends on the material composition.
Physical-Chemical Mechanism of Action
The fusion weldability of a metal refers to its ability to create a crack-free and soft joint during fusion welding. This is achieved by adding deoxidizers like silicon or titanium, which help deoxidize the material and increase the strength of the joint.
Metallurgical Relevance & Risks in Welding
Poor fusion weldability leads to porosity and cracks in the joint. This can cause brittleness and reduced service life of the component. It is important to follow the correct filler materials and process parameters to produce a high-quality weld.
Workshop Practice & Instructions
To improve fusion weldability, silicon or titanium can be added to the melt. The temperature and time of the melting process must be precisely controlled. For steels with high carbon content, cooling after welding should be slow to obtain a soft joint.