MIG Welding with Active Wire
Metal inert gas welding with active wire is a special MIG process where specially alloyed cored wires control metallurgical reactions in the weld pool despite inert shielding gas. This optimizes the mechanical properties of the joint.
Physical-Chemical Mechanism of Action
In metal-cored arc welding with active wire, a specially alloyed cored wire is used while the weld pool is protected by inert gas. This allows precise control of metallurgical reactions in the weld pool by introducing the additives directly into the process.
Metallurgical Relevance & Risks in Welding
This method optimizes the mechanical properties of the joint through precisely controlled alloying. However, incorrect selection or handling of the active wire can lead to unwanted phase formations, which can affect strength and toughness. Additionally, the inert shielding gas must be set correctly to avoid porosity.
Workshop Practice & Instructions
To successfully perform metal-cored arc welding with active wire, choose a specially alloyed cored wire according to the desired alloy. Set the inert shielding gas so that it optimally protects the welding process and avoids porosity. Pay attention to correct temperature and voltage control during welding to ensure a homogeneous joint.