Magnetically Controlled Arc Welding
Magnetically controlled arc welding is a pressure welding process for pipes where the arc is redirected by a magnetic field onto the end faces. After the parts are melted, they are pressed together axially.
Physical-Chemical Working Principle
The magnetic field influences the arc so that it follows a precise and controlled path. This enables uniform melting of the materials to be joined.
Metallurgical Relevance & Welding Risks
Inaccurate control of the magnetic field can lead to uneven melting, resulting in stresses and possible cracks in the weld area. Too high a melting speed increases the risk of hot cracking.
Workshop Practice & Instructions
Make sure the magnetic field is set correctly to ensure a straight and constant arc movement. Keep the melting speed below 20 m/s to avoid hot cracking. Press the parts together with an axial force of at least 100 N/mm².