Plasma Hardfacing

Plasma Hardfacing: Plasma powder surfacing uses a plasma arc as a heat source. The alloy powder and the substrate surface are rapidly heated, melted, mixed, diffused, and solidified by applying the high temperature generated by the plasma arc.

After the plasma beam leaves, it cools down and forms a high-performance alloy layer. Thus the surface of the part is strengthened and hardened.

Due to the plasma arc has a high arc temperature, high heat transfer rate, excellent stability, melt depth controllability. By adjusting the relevant surfacing parameters, the thickness, width, and hardness of the surfacing layer can be freely adjusted within a specific range.

Plasma powder surfacing after the formation of a fusion interface between the base material and the surfacing material, the combination of high strength. Surfacing layer organization dense, corrosion resistance, and excellent wear resistance. The dilution of the base material and surfacing material is reduced, and the material properties change little.

The use of powder as surfacing material can improve the selectivity of alloy design. In particular, the ability to smoothly surfacing refractory materials. Improve the wear resistance, high temperature resistance, and corrosion resistance of the workpiece.

Plasma powder surfacing offers high productivity and aesthetically pleasing shapes and can easily mechanize and automate surfacing.




  • WALDUN have 15 years of experience. Committed to wear plate, wear pipes, parts, and related equipment production and sales.
  • Our equipment used by significant suppliers of wear-resistant plates in many countries. Contact us to get some references.
  • We use our R & D and manufactured hardfacing equipment to produce wear-resistant plate, our annual wear-resistant plate production value reach more than 20 million US dollars. Therefore, we are experts in the production of wear-resistant plates. Only in the creation of the wear-resistant plate, we can provide you with the best wear-resistant production types of equipment.
  • In total, we sold over 500 surfacing machines in the past ten years.
  • Our lead time is short because we have a very mature supply chain.
  • According to your unique production requirements, we can provide custom-made corresponding non-standard equipment. Contact us for more information.
  • We have an excellent after-sales service team. To make sure you use the equipment properly after you buy it.
  • We have excellent quality assurance on our machines. All the tools we produce has a one-year warranty.
  • Our package can meet your shipping, air transport requirements.

Plasma Hardfacing – The Complete FAQ Guide

Many people still do not know what plasma hardfacing is. You might even be perplexed as to what it is.

This is perfect because in this guide, we will discuss everything you need to know about plasma hardfacing.

From what it is, what techniques are involved, and where you can get equipment for it – we’ll cover it here for you!

Understanding Plasma Arc Welding (PAW)

Plasma arc welding, is a welding process where the electrode is within the torch’s body.

Plasma Arc Welding

You can find it similar to Tungsten Inert Gas (TIG) welding; and the only key difference is with the location of the electrode.

What this does is it separates the shielding gas envelope from the plasma or the electric arc.

What is Hardfacing in Welding?

Hardfacing is a metalworking procedure where you strengthen a base or a parent metal through deposition of tougher and harder materials.

Hardfacing in Welding

Oftentimes, you’d apply wear plates and other thick coatings to base or parent metals. This is to improve and enhance durability, resistance, and lifespan.

What is Plasma Hardfacing?

PTA or plasma transferred arc hardfacing is a process of depositing tough materials to base metals using plasma.

Plasma Hardfacing

Plasma hardfacing utilizes plasma powder, melts it, and uses the heat from the arc to complete the deposition.

Once the area heated cools down, you’ll see that the outside layer has been formed.

What are the Different Hardfacing Techniques?

You can accomplish plasma hardfacing by utilizing a bunch of techniques and processes.

Different Hardfacing Techniques

But, the most common ones include:

Welding Processes

There are many welding processes you can do to complete hardfacing.

You can choose to utilize plasma transferred arc welding (PTAW), oxyfuel welding (OFW), submerged arc welding (SAW), and many more!

Spray Fuse

Out of all hardfacing processes, spray fuse is known to be the most common.

In spray fusing, you’ll force metal alloys via a gun type of torch; the powder will be molten and will be deposited to the part or component.

Thermal Sprays

Unlike spray fusing, thermal sprays join two elements together mechanically. The material you’ll add would not pass through high heat.

Those are the primary procedures of hardfacing; there are others, but those are the most common.

Applications of Plasma Cladding or Hardfacing

You can use plasma hardfacing or cladding in a lot of applications.

Applications of Plasma Hardfacing

However, the typical uses you can have for it include the following:

  • Engines (automotive, aircraft, marine, etc.)
  • Valves and valve seats
  • Chutes and liners
  • Power and generation industry
  • Welding and fabrication
  • Pressure tanks and vessels
  • And many more!

What are the Advantages of PTA Hardfacing?

You can get a ton of benefits in doing PTA hardfacing over the usual welding processes.

Advantages of PTA Hardfacing

Some of these advantages include, but are not limited to:

Easy Automation

PTA hardfacing can easily be automated; giving you better chances of replicating the same result over and over again.

Wide Range of Material Capability

Unlike thermal sprays, plasma hardfacing is applicable to more types of metals and alloys.

It’s a lot more compatible than sprays and it sticks better to a myriad of substrates.

Better Control

You will be able to maneuver it better with much more control; you’ll be able to toggle the heat input, amperes, powder feeder rates, etc.

Smoother Deposits of Material

Plasma hardfacing can give you a better guarantee that the deposits will be smoother.

Because you’ll be able to control it better, there’ll be less post-weld procedures.

These are just some of the benefits of plasma or PTA hardfacing; there are others, and they’ll depend on what you need it for.

Welding Rods Used For Hardfacing

For hardfacing, the welding rod you’d have to use will depend on the results you’re looking for.

Welding Rods for Hardfacing

There’s a specific type of welding rod for restoration and recreation, and there’s a particular type for wear and corrosion resistance, for durability and strength, and so on.

What Welding Electrodes Can You Use With Plasma Hardfacing?

Akin to welding, you can use a wide range of electrodes for PTA hardfacing.

Welding Electrodes

You can use stainless steel electrodes, carbon steel electrode, wires, powder form electrodes, and so on.

The most common type of material to deposit in PTA hardfacing, though, would be powder.

Plasma Hardfacing Machines and Equipment

There are a lot of plasma and PTA hardfacing equipment and machines you can use.

Plasma Hardfacing Equipment

You can use singular machines, CNC systems, as well as PTA mechanisms and equipment.

The best machines and equipment you can get will depend on your requirement. If you prefer thermal spraying, then you need to purchase machinery that has this capability.

If you, on the other hand, prefer welding, you’d want a welding machine that can perform the hardfacing you need.

Plasma Hardfacing Machines and Equipment Price

The rates and prices of heavy-duty machines like this aren’t stagnant.

You can’t just find them online, you’d have to ask your supplier or your manufacturer for it.

But, you can get plasma hardfacing machines for prices that range from $8,000 to $20,000.

Where Can You Get the Best Plasma Hardfacing Machines and Equipment?

Out of all manufacturers globally, China still has the best and the most renowned companies.

Here in China, Waldun is known as the best and the most trusted plasma hardfacing expert.

We can help you perform the plasma hardfacing you need, as well as provide the equipment for it. You can also ask us to specify a certain machine, following what you need!

Why Choose Waldun?  

For many years, Waldun has dominated the market in providing plasma hardfacing machines and equipment.

We’re ISO 9001 and ISO 14001 certified, guaranteeing you safe and quality products and services.

All our plasma and PTA hardfacing machines and equipment are checked and assessed before distribution. You’ll never have any problems with it!

Contact us now and get the plasma hardfacing equipment you need for a reasonable and a competitive rate!