In the PTA welding process the plasma arc is focused on the anode with significant increase in arc density, energy and temperature. The alloying powder is supplied directly to the plasma arc and shielding gas ensures protection of the welding pool against atmospheric impact. Energy of highly-concentrated plasma arc is almost completely consumed in the metal melting process. Heat input into the base metal and interfusion ratio are eliminated.

Examples

PTA welding equipment EuTronic® GAP by Castolin Eutectic is perfectly fit for welding and building-up purposes. Castolin Eutectic developed special powders for plasma transferred arc welding of EuTroLoy series to be applied with equipment for EuTronic® GAP plasma transferred arc welding.

Advantages

PTA technology provides a range of opportunities and offers numerous advantages as compared to electric arc welding:

• lowest metal interfusion;
• lowest heat input into the part;
• complete control of plasma arc;
• smooth surface with minimum mechanical treatment;
• highest purity of the alloyed layer;
• pit-free and blister-free coatings;
• high adhesion.