Plasma Transferred Arc - PTA

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 of PTA

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

Learn about CASL’s service and technology offerings. Our industry solutions provide the best in class services to meet the demands of your business.

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    Weld Overlay

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    Thermal Spray

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    Component Remanufacturing

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    HaloJet ID HVOFTM System

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    Overlaid Spools

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    Field Service

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    Machining & Finishing

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    Research & Development

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    Coating Materials