PTA Welding Machine | Plasma Transferred Arc Welding

(Plasma Transferred Arc)& System

PTA welding machine (Plasma transferred arc welding machine)  is a thermal process for applying wear- and corrosion-resistant layers on surfaces of metallic materials.

WALDUN are expert on production and sales of PTA welding machine. WALDUN PTA welding machines have higher quality with moderate price. If you have budget to purchase one, don’t hesitate to contact us.

PTA Welding is a versatile method of depositing high-quality metallurgically fused deposits on relatively low-cost surfaces.

The PTA process is used in instances of extreme demands on wear resistance.

Plasma transferred arc welding machine is mainly used in high quality large flat surface spray welding.

After surface hardness can reach HRC58-60, within the scope of the 1000 x1000 weld layer does not crack, not obvious deformation.

Can work out a complete plane without defects, can be used in the manufacture of rolling mill bearing high hardness skateboard.

PTA Welding Machine Features:

  • High automation, one button start and stop, simple operation, greatly simplifies the operation process
  • Barreled welding wire located above the beam, to ensure smooth wire feeding
  • Water cooling effect is good; ensure welding wear-resistant plate, plate deformation after welding is very small
  • CNC systemis used to control the operation of the machine, AC variable frequency speed regulation, improve equipment reliability
  • IPC control the stability of the platform, in order to ensure the long time stable operation of welding system
  • Machine parameters can be set to make any combination of the welding torch welding
  • The integration of multi welding torch swing, driven by AC servo motor, stable swinging, weld forming beautiful
  • Breakpoint welding function
  • Air-cooled torch improve consumable life

Plasma-transferred arc (PTA) welding

PTA Welding Machine Technique Data:

Main technical parameters PH-V03BD
impulse welding continuous welding
pilot arc current (A) 3-20 3-20
welding current (A) 2-300 2-300
basic current (A) 2-110
current-rise time (s) 0-2.0 0-2.0
Current fall time (s) 0-2.0 0-2.0
Pulse welding time(ms) 1-999
welding interval(ms) 10-990
Gas protection time(s) 1.0-20.0 1-20.0
 Input Voltage (V) 3PHASE,380V,50HZ AC
Rate input power capacity (KVA) 17.8
Cooling capacity(W) 5200
Duty cycle (%) 60%
Rated flow of cooling water m³/h 1
Cooling water rated head m 15
Weight(KG) 161
Dimension (mm) 800*500*1558
Gas flow control range 0.2~2L/min
Powder gas flow regulating range 0.5~2L/min
Shielding gas flow regulating range 2~12L/min
Powder bucket capacity 10Kg
Powder quantity adjusting range 0~50g/min
Distance 3~12mm
Thickness of the surfacing at a time 1-4mm
Width of the surfacing at a time 2-13mm
Powder size 50-200 mesh
Powder surfacing welding efficiency ≥90%




  • Plasma-transferred arc (PTA) welding is a thermal process for applying wear- and corrosion-resistant layers on surfaces of metallic materials. It is a versatile method of depositing high-quality metallurgically fused deposits on relatively low-cost surfaces. The PTA process is used in instances of extreme demands on wear resistance.

Enclosed Type Plasma Cladding Machines


  • Enclosed plasma cladding machine can be used for welding the head, cutter, valve and other shaft parts, pipe parts of the outer circle, the inner hole and the end face. Surface strengthening and repair of wear-resistant layer overlays and damaged surfaces and disc parts.

plasma welding machine for thick plates


  • For pressure vessel, high-pressure pipe, thick plate, rare metal zirconium-titanium-nickel-copper thick plate welding, we introduction of the highly efficient stig high penetration plasma welding machine and automated circular seam tooling for single-sided and double-sided welding through 14 mm. Forming, no beveling required.

Plasma transferred arc coating


  • Plasma transferred arc coating machine is automated specialized in the production of lead screws, applicable to screws, spiral parts, all kinds of shafts, and extended shaft OD coating plasma surfacing reinforced.

Valve hardfacing machine


  • Valve hardfacing machine can be used as a jig for shafts and bores, and with the operating machine, it can be programmed to strengthen and repair plasma surfacing for specific parts.

Robotic Hardfacing


  • Manipulator + 600 kg welding positioner (360 degrees rotatable) is programmable and controlled to achieve a variety of shaped parts, conventional parts surface coating repair, and intensive plasma surfacing and welding treatment.

Why us?

We Got Reliabe Tools

WALDUN has very high precison machines for manufacturing different parts for our plasma welding machine since it’s established in 2006.

Certified Experience

WALDUN plasma welding machine sold worldwide and meet local certification requirements, including Europe, America, South America, Australia, Asia and etc.

Moderate price

WALDUN plasma welding machine market positioning is always of better quality and affordable. Contact us for a solution now!

Longtime Guarantee

WALDUN plasma welding machine of high quality and can be used for quite a long time. All series equipment with a one-year warranty and lifetime maintenance.

15 Years Experience

WALDUN specialized in providing solutions for wear resistance for 15 years, and have many successful projects in cement, power plant, mining, glass, ATMs, etc.

Great Service Support

WALDUN has a sound service system, including pre-sale, mid-sale, and after-sale. We are committed to answering your request within 8 hours.

Customers & Partners


PTA Welding Machine – The Ultimate FAQ Guide

Hardfacing mechanical parts, components, and workpieces isn’t an easy thing to do. In fact, it requires special equipment that can get the job done swiftly.

Are you in this type of business? If so, then it’s best to choose a company that uses PTA Welding Machine.

What is PTA Welding?

PTA, or Plasma Transferred Arc Welding, is a welding process that uses a tungsten electrode to create a high-density arc.

PTA Welding

In most cases, it’s the welding process you will use for hardfacing on mechanical surfaces.

What are PTA Welding Equipment?

PTA Welding Equipment are the machineries or equipment used for PTA Welding.

PTA Welding Equipment

These are the types of machines you need to use to perform hardfacing or cladding to your machines.

The most common parts or units PTA welding equipment has include:

  • Column & Boom
  • Powder Feeder
  • Water Chiller or Recirculator
  • Power Source
  • Weaver or Welding Oscillator
  • PTA Torch
  • Welding Positioner
  • Process Control Panel

What is the PTA Process?

It’s a liquid-state welding process, where the metal-to-metal joint forms into a molten state.

PTA Welding Process

In the process, you use the hot ionized gases to heat the workpiece or the surface. Due to the heat, fusion happens and the weld is completed.

What is Plasma Arc Welding (PAW)?

Plasma Arc Welding or PAW is a welding process almost the same as the PTA.

Plasma Arc Welding

They use the same method but differ on the materials utilized.

The difference is with the filler material you will use:

  • PAW uses filler metal in wire form
  • PTA uses filler material in powder form

What are the Fields of Application of PTA Welding?

Whatever industrial sector you are in, you can greatly benefit from PTA Welding.

PTA Welding Applications

The most common applications you can have for it include, but not limited to:

  • Forging of Matrix Dies and Moulds
  • Making Corrosion or Abrasion Resistant Industrial Equipment
  • Improvement of Automotive, Petrochemical, and Marine Valves
  • Enhancement of Lamination Rollers and Rollers
  • Enhancement of Cutting and Milling Tools
  • Development of Parts for Nuclear Plants
  • Developing Industrial Cutters and Blades
  • And Many More

What are the Advantages and Disadvantages of Plasma Arc Welding?

Hole From Welding (Disadvantage)

Plasma arc welding has a ton of advantages, some of which include:

  • High Rate of Deposition
  • High Heat Concentration
  • More Freedom to See and Observe the Weld
  • Low Pollution
  • Less Expensive or Costly
  • Controlled Penetration

Apart from that, though, it also has certain disadvantages, which are:

  • Generation of Smoke and Noise
  • Difficult to Make Sharp Corners
  • Wider Heat Affected Zones and Weld Areas
  • Produces Infrared and Ultraviolet Radiation

What is Plasma in Welding?

In welding, the hot ionized gas that forms in the process is called the plasma.

Plasma Sample

Plasma is formed due to the ionization of Argon that passes through the electric arc.

Is Plasma Safe?

Yes, plasma is safe to use and it’s not different from other compounds.

But, just like others, there are precautionary standards you have to follow.

What is Plasma Welding Used For?

Plasma Welding Uses

Generally, you would want to use plasma welding if you want to achieve the following:

  • Better Control and Quality of the Output
  • Cleaner, Smoother, and More Specific Designs
  • Higher Heat Tolerance
  • Lower Cost of Welding

What is TIG Welding?

TIG is short for Tungsten Inert Gas Welding.

TIG Welding

It is a type of welding that produces the weld using a non-consumable tungsten electrode.

Is TIG Welding the Same as Plasma Welding?

No, TIG welding and PTA welding are two different welding processes. In TIG welding, you would form the arc using a tungsten electrode.

TIG welding is the process you can use for workpieces and surfaces that are thin and brittle.

In plasma welding, you would place the electrode in the torch and the arc is gas-infused. This ionizes the gas, forming the electrical arc.

Plasma welding is a process that is better known to cut materials and surfaces.

Can You Use TIG Welding Machines as a Plasma Cutter?

Yes, you actually can.

TIG Welding Machine Plasma Cutter

TIG welding machines have features that you can use to cut metal or steel. However, it might not be as good as a plasma cutter.

Can PTA Welding be Done Using Tungsten Carbide?

Yes, in fact, it’s the usual type of carbide used in the PTA welding process.

Tungsten Carbie PTA Welding

Tungsten has tough and resistant properties. So, they are the perfect material to help improve the durability of your machines.

What are the Best Welding Brands?

There are dozens of welding brands in the world – but what are the best ones?

The best welding brands that you can actually take advantage of include:

  • Lincoln Electric
  • Miller
  • Elektriska Sventsnings-Aktiebolaget (ESAB)
  • Hobart Welding Products
  • AHP
  • Everlast
  • Fronius

What is PTA Hardfacing?

It’s the process of applying metallurgic deposits on workpieces.

It uses the plasma transferred arc method for deposition and for the coating procedure.

PTA Hardfacing

Hardfacing’s goal is to improve the properties and the durability of a part or component.

What is Hardfacing?

Hardfacing is the application of material to a surface or a workpiece through welding.

Hardfacing Sample

The most common materials you would need to overlay your parts are:

  • Corrosion Resistant
  • Wear Resistant
  • Abrasion Resistant
  • Erosion Resistant

Who Can Help You With PTA Welding?

There are lots of companies out in the market from all around the world.



If you’re looking for the best, China should be your first option. They have the best and the most advanced firms and organizations.

We here at Waldun have the best PTA welding equipment that you can use for your projects.

We’re the best in the region and we serve many clients both locally and abroad.

What are Our PTA Welding Machine Features?

Some of the best features that all our PTA welding equipment have include:

  • Breakpoint welding function
  • Satisfactory water cooling effect
  • Stop and start with just one button
  • Simple operations
  • CNC-controlled operations
  • And many more

What are the features of a PTA welding machine?

PTA hardfacing machine for lead screw

  • The cladding alloy layer added to the workpiece matrix with high bond strength.
  • It has fast cladding speeds with low dilution rates.
  • The cladding layer is dense and beautifully formed.
  • Plasma welding can directly use on the surface of rusted and oiled metal parts.
  • Easy mechanization and automation.
  • It has a simple structure, energy-saving, and easy operation.

What are the applications of PTA welding machine?

Tungsten Carbie PTA Welding

People are using PTA welding machine in petroleum, chemical, engineering, mining, and other industries.

Sealing welding of various types of valves.

Repair of worn oil drill pipes, bearings, shafts, rollers, wrenches, etc.

What is the classification of PTA welding machine?

PTA Hardfacing

PTA welding machine has several types.

(1) Cold-wire plasma welding

Use cold wire plasma welding wire as a filler material, without preheating directly into the welding zone for welding.

(2) Hotwire plasma welding

Hotwire plasma welding uses welding wire resistance of its own preheating and then sent to the plasma area for welding, single wire, or double wire feeding.

(3) Prefabricated plasma welding

Alloy is prefabricated into a specific shape and placed on the surface to be surfaced, which is then plasma melted to form the welding layer.

(4) Powder plasma welding

Powder plasma welding is a welding method in which alloy powder is fed into a plasma arc and melted to create a welding layer. Alloys are mostly made into powder, so powder plasma welding is available in a wide range of materials and is not limited by the ductility of materials like wire.

What is powder PTA welding?

PTA hardfacing for lead screw

The alloy powder commonly used in powder plasma arc welding is mainly self-fusing alloy powder and composite powder.

Self-fusing alloy powder

Self-fusing alloy powders include nickel-based, cobalt-based, iron-based, copper-based, etc. The iron-based alloy powders are widely used because of the vast raw materials, low price, and good performance.

The iron-based alloy powder is widely used because of the complete raw materials, low price, and good performance.

However, nickel and cobalt are scarce metals with high costs and are generally only used for welding with unique surface properties.

(1) Nickel-based self-fusing alloy powders are divided into nickel boron silicon series and nickel-chrome boron silicon series.

(2) Cobalt-based self-melting alloy powder: B and Si elements are added to the cobalt-chromium-tungsten alloy to form. The cobalt-based self-fusing alloy has excellent high-temperature performance, good hot strength, corrosion resistance, and thermal fatigue resistance. It is more suitable for a high temperature of 600 ℃ ~ 700 ℃ work of oxidation resistance, corrosion resistance, wear-resistant surface coating. Such as high-pressure valve sealing surface welding.

(3)Iron-based self-fusing alloy powder can be divided into two types: austenitic stainless steel type self-fusing alloy and high chromium cast iron type self-fusing alloy.

(4) Copper-based self-fusing alloy powder: copper-based alloy scratch resistance, good plasticity, easy to process. Mainly tin-phosphor bronze powder and add nickel white copper powder.

Composite alloy powder

Composite powders are composed of two or more solid phases with different properties.

The composite powder structure can generally be divided into coated, non-coated, and sintered, and other different categories of powder.

What is PTA powder welding?

Tungsten Carbie PTA Welding

PTA powder welding, using the high temperature generated by the plasma arc, the alloy powder, and the substrate’s surface, will be rapidly heated and melted, mixed, diffused, and solidified together. The plasma beam leaves and cools itself to form a high-performance alloy layer. It strengthens and hardens the surface of your parts.

Plasma overlay welding VS Plasma spraying


In principle, the plasma arc is used to generate back to the heat source will be melted powder attached to the workpiece’s surface after the process.

Plasma arc welding consumables and the workpiece bonding strength is better. The metallurgical bonding, the welding layer thickness is thicker.

Plasma arc spraying is suitable for a thin layer, extensive area welding; the arc column is long and can be far from the workpiece welding.

Plasma welding VS laser welding

Plasma is arc welding, the laser is photothermal welding, and plasma is generally more efficient than laser. But extreme field lasers are more suitable.

Laser welding is the process of adding a cladding material to the surface of a substrate, using a high energy density laser beam to melt and condense it together with a thin layer. To form an additional cladding layer on the substrate’s surface, which is a metallurgical combination with the material.

What is the difference between two layers and one layer of the PTA welding machine?
plasma cladding machine

Welding one layer is better in terms of strength.

If the dilution rate in terms of welding two layers better.

Another defect with the base material is what the material is related to the base material’s general hardness is less welding defects.

The thicker the cladding layer, the greater the probability of defects.

Plasma cladding VS Plasma welding VS Plasma spraying

Although they are all plasma welds, cladding, overlays, and blasting are not one process.

Plasma cladding is when alloy powder is used as filler metal, which is heated and melted together with the substrate surface to form an alloy layer.

Plasma welding is applied to repair thicker base materials, such as coal mills, cement mills, and rolls.

Plasma welding is used to repair components with thin base material or suitable for weldings, such as high-pressure boiler tube wall spraying and fan blade spraying.

What gases are used for PTA powder welding?

Advantages of Plasma Welding

PTA powder welding is not recommended to use a mixture of gas. It is recommended to use argon gas. It is better to use mixed gas for welding only.

What is the reason that the hardness of plasma powder welding does not meet the standard?

First: different grades of alloy powder (welding consumables) have a corresponding hardness; you can see if the alloy powder problems.

Second, if a specific grade of powder hardness of HRC50, but the hardness after welding is not 50 degrees, it is possible to surface the thickness of too thin.

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