PTA welding




PTA welding is done fully-automatically by a 12-axis robot. Here are the key facts:




max. Ø: 3,500 mm
max. length: 10,000 mm
max. piece weight: 10 t

Inside welding: from ø 50 mm to 3,000 mm length




PTA welding - process description:




During PTA welding the surface of the workpiece is partially melted by a plasma arc used as heat source. The weld consumable is supplied by a carrier gas.




Advantages of this procedure:




We also offer any other standardized welding (TIG welding, MAG welding etc.) in our facility.




The advantages of this procedure are a low fusion degree (ca. 5%) and a small heat affected zone. Machining allowances are considerably lower than in other welding processes. Lamination strength may be very much smaller (> 1mm). Additionally, we offer a wide range of materials including tailor-made powder blends.




Weld consumables are divided into three categories:




·       Iron-based alloys (e.g. 1.4571, 1.4313, Tristell)

·       Cobalt-based alloys (e.g. Stellite, Tribaloys)

·       Nickel-based alloys (with or without tungsten carbides)




Typical applications:


Weld consumable application




Guide bushes (Stellite)

Moulds for the plastics industry (nickel-based alloy)

Forging dies (Stellite)

Extruder screws (nickel-based alloy with tungsten carbide)

Spherical valves (Stellite)

Sealing surface of wedge gate valve plates (Stellite)

Diverse parts of the chemical industry (Hastelloy)










Finishing layers of resistant materials implies experience therein and special tools. IMC Extrudertechnology accepts any orders from you to entirely finish your work.