Plasma Transferred Arc Welding (PTAW)

Plasma Transferred Arc Welding (PTAW)

Teknokraft has been working with PTAW since 1995.  Plasma Transferred Arc Welding (PTAW) is a type of arc welding process that is like gas tungsten arc welding (GTAW). In PTAW, the electric arc is formed between an electrode (usually made of sintered tungsten) and the workpiece, and the plasma arc is separated from the shielding gas envelope by positioning the electrode within the body of the torch. The plasma is then forced through a small copper nozzle which constricts the arc, and the plasma exits the orifice at high velocities and high temperatures. PTAW is unique among surfacing processes as it gives True Metallurgical Bonds, meaning the weld deposit cannot chip off the base metal. The alloy used in PTAW is 65% Macro Crystalline Tungsten carbide alloy, mixed in a NiCrBSi matrix, which offers the best combination of abrasion and impact resistance and cosmetic appearance. PTAW is an inexpensive process, with the cost depending on the surface area to be coated and the thickness of the deposit, and the savings come during the repair of the PTA coating which is often very inexpensive.
Plasma Transferred Arc Welding (PTAW) offers several benefits over other welding processes.
High precision: The use of a small copper nozzle allows for a high degree of precision in the welding process, resulting in minimal distortion of the workpiece.
High travel speed: The high velocity of the plasma allows for faster travel speeds during welding, increasing productivity.
Low dilution: The low dilution rate of PTAW, usually less than 5%, means that the surfacing alloy is of the highest purity. This leads to better wear life in the field.
High bond strength: The metallurgical bonding mechanism of PTAW results in excellent bond strength between the substrate and the alloy, making it ideal for applications that require high abrasion and impact resistance.
High abrasion resistance: The use of Tungsten carbide alloy as a surfacing material results in excellent abrasion resistance, particularly against fine particle abrasion accompanied by impact.

Easy repairability: PTA deposits are easy to repair, allowing for partial repairs or welding over the deposit, which can save time and cost.

High impact resistance: The high bond strength between the substrate and the alloy results in excellent impact resistance.
Versatility: PTAW can be used on a wide range of materials including metals.

For further Inquiries, Contact Us at 0817-7959-0046 (Teknokraft WhatsApp Hotline) or fill out the contact form page. Please include your name, phone number, email, and equipment description, and we will get back to you as soon as possible. Thank you for considering Teknokraft for your repair needs.