PTAW Welding

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PTAW Welding
WALKSON can provide specially formulated Tungsten Carbide Overlay (TCO) applied by Plasma Transferred Arc Welding (PTAW) process on any casting or fabrication part surface to increase the wear-resistant property of the part.

For extremely abrasive applications, the overlay properties in the following chart will be used. The lifecycle of this type of overlay by PATW welding is 5-6 times longer than Chrome Carbide Overlay. Typical Applications of this kind of overlay are Slurry line, slurry pump suction and discharge spool, wear spool, spray nozzles.

Why Choose WALKSON PTAW Welding

For heavy load applications, the tungsten carbide is 60-70 wt % and the balance is NiB matrix. The particle size of prime carbide is in the range of 60-325 mesh (44-250 micron) with hardness HV 2700-2900. The bulk hardness of NiB matrix is HRC 45-55.

This formula is designed for medium to heavy load application. The combination of high hardness of the prime carbide and high toughness of the matrix make the wear products excellent for high-impact applications. Its lifecycle is 5-6 times longer than AR plates.


Under the same parameters, the MZ or HAZ cannot be observed in the NPAW weld, indicating that the total heat input distribution of TPAW is much larger than that of NPAW . This trend provides a possible way to better control the energy of the plasma arc and expand the application of the plasma arc.

We can also offer kinds of shovel replacement parts for sale, if you have needs, please contact us.

PTAW Welding