In case of welding problems, such as temperature, corrosion and/or abrasion /shock, high quality steel is not always adequate protection. That is why we now normally use

• Small filled pipes
• Filler wire
• Welding powder made of hard nickel, FeCr or tungsten carbide

using

• GMA
• Open Arc
• Electrodes
• Oxacetylene

for wear plating.

At EIPA Eisen Palmen we have decided to offer even better protection using the PTA process for resurface welded parts for wear protection.

Opposite a schematic drawing of PTA welding.

Process Description

• Non-fusing electrodes as primary heat source
• Two arcs with independent power sources
• First arc between electrode and plasma nozzle, acting as the basis for ignition of the main arc, which burns between the workpiece and electrode.
• For resurface welding, powder is fed from the store tank using gas for internal or external application.

Micrograph of EIPA NiWC60

What are the benefits if you use PTA for your components?

• Complex protection of surfaces
• Low mixing with basic material
• Meaning increased wear protection to the basic material
• Thin wear layers of 2-3mm single-layer,
• Saving weight on the component
• High investment when coating with high quality materials
• However this will then mean a long service life

An Example of an Application with PTA