The welding quality of flux-cored welding wire is highly dependent on the matching of process parameters, mainly including the following key parameters:
Current and Voltage
Low carbon steel welding: Current range 150-300A, voltage 22-32V (refer to AWS A5.20 standard). Too low a current can easily lead to incomplete fusion, while too high a current may cause burn-through.
Stainless steel welding: Current needs to be reduced by 10%-15% (e.g., 130-260A), voltage 18-28V, to reduce intergranular corrosion caused by heat input.
Wire Feed Speed
Generally positively correlated with current, for example, 200A current corresponds to a wire feed speed of 4-6 m/min (data source: Lincoln Electric technical manual).
Shielding Gas
CO₂ is suitable for low-cost applications but produces more spatter;
Ar+CO₂ mixture (75%Ar+25%CO₂) can reduce spatter and improve weld formation.
The main cylinder operates at a pressure of 21 MPa and is equipped with an 11 kW main motor and auxiliary motor. It supports solid solder wire, three-core solder wire, and thin strip extrusion molding. It can achieve mass production of high-strength steel, stainless steel, and nickel-based alloy welding materials.
