Plasma Transferred Arc (PTA)

Description

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 & Benefits

Low heat input

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”)

Decreases the detrimental impact of a heat

Low dilution, typically 2% – 5%

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

Increases impact resistance of the overlay

Wide variety of materials can be applied

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

Minimal distortion of the substrate

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

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