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PTA Cladding/Hardfacing

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PTA Cladding/Hardfacing

PTA Cladding

Plasma transferred arc (PTA) Cladding/Hardfacing is a versatile method of depositing high-quality metallurgically fused deposits on relatively low-cost surfaces. Soft alloys, medium and high-hardness materials, and carbide composites can be deposited on a variety of substrates to achieve diverse properties, including wear and corrosion resistance at ambient or elevated temperatures. PTA hard facing has several advantages over traditional welding processes, such as oxyfuel (OFW) and gas tungsten arc (GTAW) welding.

PTA Process

  • PTA is easily automated, providing a high degree of reproducibility.
  • It allows precise metering of metallic powder material, making it highly efficient and cost-effective compared to traditional welding processes.
  • It permits precise control of important weld parameters, such as powder feed rates, gas flow rates, amperage, voltage, and heat input, ensuring a high degree of consistency from lot to lot and component to component.
  • It produces deposits of a given alloy that are tougher and more corrosion-resistant than counterparts laid down by GTAW or OFW processes. Weld deposits are characterized by very low inclusions, oxides, and discontinuities.
  • It produces relatively smooth deposits that significantly reduce the amount of post-weld machining required.
  • Its parameters can be adjusted to provide a variety of deposits in thicknesses from 1.2 to 2.5 mm (0.050 to 0.100 in.) or higher.
  • Depending upon the torch, powder, and application, these can be deposited by a single pass at a rate of 2lb/hr up to 10lb/hr.
PTA Hardfacing process

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