Heavy Wear Hardfacing & Thermal Surfacing
Plasma Transferred Arc (PTA) Hardfacing Prepress Calculator
Determine dilution percentage, net linear heat input, powder deposition efficiency, and multi-pass serpentine CAM oscillation parameters for Stellite, tungsten carbide, and Colmonoy wear cladding.
Process Parameters & Inputs
Main transferred arc welding current in Amperes (A).
Constricted plasma arc voltage in Volts (V).
Wear-resistant powder feed rate in grams per minute (g/min).
Linear torch travel feed speed in mm/s.
Transverse weave oscillation width in mm.
Calculated Engineering Metrics
Substrate Dilution Ratio
5.8%
Net Linear Heat Input
0.73kJ/mm
Single-Pass Overlay Height
2.6mm
Build Deposition Rate
1.85kg/hr
Toolpath & Geometry Simulation
Engineering Reference:
→ Read the Plasma Transferred Arc (PTA) Hardfacing Prepress CAM Vector Guide
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Plasma Transferred Arc (PTA) uses a constricted pilot arc and high-velocity argon plasma column to melt powder consumables. PTA achieves ultra-low dilution ($< 8\%$) compared to submerged arc or MIG cladding ($15-30\%$).
Dilution Ratio & Overlay Layer Height:
Dilution\% = \frac{A_{penetration}}{A_{bead} + A_{penetration}} \times 100\%HI = \eta_{thermal} \cdot \frac{V_{arc} \cdot I_{arc}}{v_{travel}}t_{overlay} = \frac{\dot{m}_{powder} \cdot \eta_{catch}}{\rho_{alloy} \cdot W_{osc} \cdot v_{travel}}
Low dilution ensures full hardness and maximum carbide retention in single-pass overlays on oil & gas valve gates, extruder screws, and mining excavator teeth.