Principle analysis for PTA welding equipment
PTA welding is the English abbreviation for Plasma Transferred Arc. It uses the tungsten electrode of the torch as the current negative, and use workpiece as current anode, then generate plasma as thermal energy. it transfers the thermal energy to the workpiece to be welded, and feeds the welding powder material to the thermal energy area. An overlay welding process which make the powder melted and deposited on the surface of the workpiece.
Technical advantages
The most significant advantage of plasma transfer arc (PTA) is that its heat affected area is small, the thermal influence on the substrate is small, and the dilution rate is low, which makes the workpiece less deformed during the welding process. Secondly, the plasma arc can be precisely adjusted, and the process controllability is strong, it can engage in delicate welding operations, and it can weld workpieces which is very thin. Third, the arc stream has high temperature, high energy density, concentrated heating, strong penetration, high-speed welding, and high productivity.
These technical advantages bring the following improvements in welding layer performance and operating costs:
Residual stress is 25% lower than OA, FLUX, MIG, etc.
Low carbon loss.
The actual hardness can be achieved on the 110 surface of the welding layer.
Perfect welding geometrical morphology.
Time saving can reach up to 65%, material savings can reach up to 65%.
Post-processing costs are reduced.
WISDOM provides fully automatic plasma welding equipment for the valve industry. The finished product rate is 99.9%. Our domestic and oversea customers are highly praised. Following are the PTA equipment introductions of our company. If you are interested, please contact us.
