PTA Vertical Screw Hardfacing Machine

Screws in mining, cement, chemical processing and recycling lines face constant abrasion, impact, corrosion and high-temperature wear. Every unplanned screw replacement means production downtime, procurement lead time and added labor cost.

Plasma Transferred Arc welding solves this at the source: it produces dense, wear-resistant overlays with strong bonding strength and tight, repeatable process control — extending component life well beyond what manual welding or flame spraying can achieve.

Key Benefits

•  Fully automatic PTA welding process — minimal operator dependency
•  Stable, repeatable overlay quality, run after run
•  Low dilution (typically under 5–8%) with strong metallurgical bonding
•  Excellent wear and corrosion resistance across abrasive and corrosive environments
•  Lower total cost of ownership through reduced maintenance and replacement frequency
•  Suitable for both OEM production and field/workshop repair

Automatic PTA Welding System The machine automatically synchronizes welding current, torch travel speed, powder feed rate and screw rotation, ensuring consistent weld quality with minimal manual intervention — reducing both scrap rate and skilled-labor dependency.

Precision Powder Feeding A high-accuracy powder feeder maintains a consistent alloy delivery rate, improving deposition uniformity and material utilization (reducing powder waste versus manual feeding).

Servo-Controlled Rotation Synchronized movement between the welding torch and the rotating workpiece keeps coating thickness even across the entire screw surface — critical for parts with variable pitch or diameter.

Flexible Alloy Compatibility The system supports a wide range of alloy powders, including:

•  Nickel-based alloys
•  Nickel carbide reinforced alloys
•  Cobalt-based alloys
•  NiCrMo corrosion-resistant alloys
•  Customized wear-resistant powder formulations

Our engineers help select the optimal powder based on the specific wear mechanism and operating environment.