Micro Plasma Arc Welding
Micro plasma welding is a plasma welding process with very low current, designed for precise joining of thin foils and fine wires in the micrometer range. It requires tight control of process parameters.
Physical-chemical mechanism of action
Micro plasma welding uses the energy of a microscopic plasma generated by a very low current. This plasma is very hot and reacts with the metals to create a fine, sharp joint.
Metallurgical relevance & risks in welding
Precision in micro plasma welding is very important. Too high a current can lead to overheating and distortion of the materials, while too low a current can affect the quality of the joint. There is also the risk of porosity if the weld is not cooled properly.
Workshop practice & instructions
For micro plasma welding, use a current between 0.1 and 5 amps. The standoff distance should be between 20 and 100 microns. Make sure the weld cools slowly and continuously to avoid porosity. Constantly monitor the process parameters and adjust them as needed.