Bases for the Development of Nickelbase Flux-Cored Wires (MCL-J1)

Interviews with different customers of welding consumables resulted in a demand for Nickelbase Flux-Cored Wires, due to their advantages compared to solid wires: weldability in position; minor oxidation of the welds through protective covering slag (lower pickling efforts); better flow out and penetration of the welding bead; less repair and restoring work on account of low spattering; usage of the same shielding gas for unalloyed and high-alloyed Flux-Cored Wires (e.g. M21); no pulsed welding current required; possibilities of small lot sizes relieves special applications; larger value range of welding parameters (Current/Voltage) for optimal solutions of welding jobs using just one wire diameter (thin and thick plates). Because of the novelty of this product, it is first proven which technical problems can occur. After this there will be the planning of the composition and the manufacture. For the first welding experiments a small tube will be formed and filled with the existing facilities. With the help of an equiped welding stall (high speed camera, measurement of current and voltage) the welding behavior of these Flux-Cored Wires are quantified (e.g. by the measurement of troplet size and frequency, analysis of the welding current graph). Based on the emerged scientific knowledge, a step by step improvement of the flux-cored wires should be possible.