Plasma Transferred Arc

PTA is a high energy, low heat inert gas weld overlay process that provides minimal interaction with the substrate material while allowing application of very thick coatings, often up to 3/8”. Commonly applied coatings include tungsten carbide, chrome carbide, Stellite and stainless steels.

Features and Benefits

Low heat input

Benefit: The arc plasma’s concentrated heat source leaves a small weld puddle resulting in minimal dissolution of the base material

Small heat affected zone (<0.150”)

Benefit: Decreases the detrimental impact of a heat

Low dilution, typically 2% – 5%

Benefit: Allows the overlay deposit to maintain its properties through the thickness of the overlay

Metallurgical bond increases adhesion of the overlay to the base material

Benefit: Increases impact resistance of the overlay

Wide variety of materials can be applied

Benefit: Allows selection of alloy type, size and matrix optimized for specific application

Minimal distortion of the substrate

Benefit: Reduced finishing work needed to maintain dimensional specifications lowers cost and improves product quality

Services and Technologies

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